Best Free APIs Directory

Find free APIs for AI, weather, finance, and development projects in our curated directory.

The Best Free APIs for Developers

Find the perfect free API for your next project. Our curated directory features hundreds of free APIs across AI, weather, finance, and developer tools - all verified to offer genuine free tiers without credit card requirements.

Whether you need AI APIs for natural language processing, Weather APIs for forecasts and historical data, Finance APIs for stock and crypto data, or Developer APIs for GitHub integration and more - we have you covered.

Pro tip: Each API card includes a copy button for the endpoint URL. Click to copy and integrate into your projects quickly.

Showing 49-96 of 1467 APIs

Free

Google Safe Browsing is an API listed in the Anti-Malware category that provides access to google Link/Domain Flagging. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Google Safe Browsing a useful integration candidate when a project needs google Link/Domain Flagging through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
MalDatabase logo

MalDatabase

Anti-Malware

Free

MalDatabase is an API listed in the Anti-Malware category that provides access to provide malware datasets and threat intelligence feeds. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes MalDatabase a useful integration candidate when a project needs provide malware datasets and threat intelligence feeds through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
MalShare logo

MalShare

Anti-Malware

Free

MalShare is an API listed in the Anti-Malware category that provides access to malware Archive / file sourcing. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as No. This makes MalShare a useful integration candidate when a project needs malware Archive / file sourcing through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
MalwareBazaar logo

MalwareBazaar

Anti-Malware

Free

MalwareBazaar is an API listed in the Anti-Malware category that provides access to collect and share malware samples. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes MalwareBazaar a useful integration candidate when a project needs collect and share malware samples through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
Metacert logo

Metacert

Anti-Malware

Free

Metacert is an API listed in the Anti-Malware category that provides access to metacert Link Flagging. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Metacert a useful integration candidate when a project needs metacert Link Flagging through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
NoPhishy logo

NoPhishy

Anti-Malware

Free

NoPhishy is an API listed in the Anti-Malware category that provides access to check links to see if they're known phishing attempts. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes NoPhishy a useful integration candidate when a project needs check links to see if they're known phishing attempts through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
Phisherman logo

Phisherman

Anti-Malware

Free

Phisherman is an API listed in the Anti-Malware category that provides access to IP/domain/URL reputation. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Phisherman a useful integration candidate when a project needs IP/domain/URL reputation through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
Scanii logo

Scanii

Anti-Malware

Free

Scanii is an API listed in the Anti-Malware category that provides access to simple REST API that can scan submitted documents/files for the presence of threats. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes Scanii a useful integration candidate when a project needs simple REST API that can scan submitted documents/files for the presence of threats through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
URLhaus logo

URLhaus

Anti-Malware

Free

URLhaus is an API listed in the Anti-Malware category that provides access to bulk queries and Download Malware Samples. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as Yes. This makes URLhaus a useful integration candidate when a project needs bulk queries and Download Malware Samples through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-MalwareNotrue
URLScan.io logo

URLScan.io

Anti-Malware

Free

URLScan.io is an API listed in the Anti-Malware category that provides access to scan and Analyse URLs. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes URLScan.io a useful integration candidate when a project needs scan and Analyse URLs through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
VirusTotal logo

VirusTotal

Anti-Malware

Free

VirusTotal is an API listed in the Anti-Malware category that provides access to virusTotal File/URL Analysis. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes VirusTotal a useful integration candidate when a project needs virusTotal File/URL Analysis through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
Web of Trust logo

Web of Trust

Anti-Malware

Free

Web of Trust is an API listed in the Anti-Malware category that provides access to IP/domain/URL reputation. It is intended for developers who want to integrate this type of anti-malware data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Web of Trust a useful integration candidate when a project needs IP/domain/URL reputation through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Anti-Malware`apiKey`true
Améthyste logo

Améthyste

Art & Design

Free

Améthyste is an API listed in the Art & Design category that provides access to generate images for Discord users. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Améthyste a useful integration candidate when a project needs generate images for Discord users through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`apiKey`true
Free

Art Institute of Chicago is an API listed in the Art & Design category that provides access to art. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as Yes. This makes Art Institute of Chicago a useful integration candidate when a project needs art through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue
Colormind logo

Colormind

Art & Design

Free

Colormind is an API listed in the Art & Design category that provides access to color scheme generator. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as unavailable. This makes Colormind a useful integration candidate when a project needs color scheme generator through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNofalse
ColourLovers logo

ColourLovers

Art & Design

Free

ColourLovers is an API listed in the Art & Design category that provides access to get various patterns, palettes and images. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as unavailable. This makes ColourLovers a useful integration candidate when a project needs get various patterns, palettes and images through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNofalse
Cooper Hewitt logo

Cooper Hewitt

Art & Design

Free

Cooper Hewitt is an API listed in the Art & Design category that provides access to smithsonian Design Museum. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Cooper Hewitt a useful integration candidate when a project needs smithsonian Design Museum through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`apiKey`true
Dribbble logo

Dribbble

Art & Design

Free

Dribbble is an API listed in the Art & Design category that provides access to discover the world’s top designers & creatives. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies OAuth as the authentication method; HTTPS support is listed as available. This makes Dribbble a useful integration candidate when a project needs discover the world’s top designers & creatives through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`OAuth`true
EmojiHub logo

EmojiHub

Art & Design

Free

EmojiHub is an API listed in the Art & Design category that provides access to get emojis by categories and groups. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as Yes. This makes EmojiHub a useful integration candidate when a project needs get emojis by categories and groups through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue
Europeana logo

Europeana

Art & Design

Free

Europeana is an API listed in the Art & Design category that provides access to european Museum and Galleries content. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Europeana a useful integration candidate when a project needs european Museum and Galleries content through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`apiKey`true
Free

Harvard Art Museums is an API listed in the Art & Design category that provides access to art. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as unavailable. This makes Harvard Art Museums a useful integration candidate when a project needs art through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`apiKey`false
Icon Horse logo

Icon Horse

Art & Design

Free

Icon Horse is an API listed in the Art & Design category that provides access to favicons for any website, with fallbacks. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as Yes. This makes Icon Horse a useful integration candidate when a project needs favicons for any website, with fallbacks through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue
Iconfinder logo

Iconfinder

Art & Design

Free

Iconfinder is an API listed in the Art & Design category that provides access to icons. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Iconfinder a useful integration candidate when a project needs icons through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`apiKey`true
Icons8 logo

Icons8

Art & Design

Free

Icons8 is an API listed in the Art & Design category that provides access to icons (find "search icon" hyperlink in page). It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes Icons8 a useful integration candidate when a project needs icons (find "search icon" hyperlink in page) through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue
Lordicon logo

Lordicon

Art & Design

Free

Lordicon is an API listed in the Art & Design category that provides access to icons with predone Animations. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as Yes. This makes Lordicon a useful integration candidate when a project needs icons with predone Animations through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue

Metropolitan Museum of Art is an API listed in the Art & Design category that provides access to met Museum of Art. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as No. This makes Metropolitan Museum of Art a useful integration candidate when a project needs met Museum of Art through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue
Noun Project logo

Noun Project

Art & Design

Free

Noun Project is an API listed in the Art & Design category that provides access to icons. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies OAuth as the authentication method; HTTPS support is listed as unavailable. This makes Noun Project a useful integration candidate when a project needs icons through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`OAuth`false
PHP-Noise logo

PHP-Noise

Art & Design

Free

PHP-Noise is an API listed in the Art & Design category that provides access to noise Background Image Generator. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as Yes. This makes PHP-Noise a useful integration candidate when a project needs noise Background Image Generator through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue
Pixel Encounter logo

Pixel Encounter

Art & Design

Free

Pixel Encounter is an API listed in the Art & Design category that provides access to SVG Icon Generator. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as No. This makes Pixel Encounter a useful integration candidate when a project needs SVG Icon Generator through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue
Rijksmuseum logo

Rijksmuseum

Art & Design

Free

Rijksmuseum is an API listed in the Art & Design category that provides access to rijksMuseum Data. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Rijksmuseum a useful integration candidate when a project needs rijksMuseum Data through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`apiKey`true
Word Cloud logo

Word Cloud

Art & Design

Free

Word Cloud is an API listed in the Art & Design category that provides access to easily create word clouds. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Word Cloud a useful integration candidate when a project needs easily create word clouds through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & Design`apiKey`true
xColors logo

xColors

Art & Design

Free

xColors is an API listed in the Art & Design category that provides access to generate & convert colors. It is intended for developers who want to integrate this type of art & design data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available; CORS is listed as Yes. This makes xColors a useful integration candidate when a project needs generate & convert colors through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Art & DesignNotrue
Auth0 logo

Auth0

Authentication & Authorization

Free

Auth0 is an API listed in the Authentication & Authorization category that provides access to easy to implement, adaptable authentication and authorization platform. It is intended for developers who want to integrate this type of authentication & authorization data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes Auth0 a useful integration candidate when a project needs easy to implement, adaptable authentication and authorization platform through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Authentication & Authorization`apiKey`true
GetOTP logo

GetOTP

Authentication & Authorization

Free

GetOTP is an API listed in the Authentication & Authorization category that provides access to implement OTP flow quickly. It is intended for developers who want to integrate this type of authentication & authorization data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as No. This makes GetOTP a useful integration candidate when a project needs implement OTP flow quickly through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Authentication & Authorization`apiKey`true
Micro User Service logo

Micro User Service

Authentication & Authorization

Free

Micro User Service is an API listed in the Authentication & Authorization category that provides access to user management and authentication. It is intended for developers who want to integrate this type of authentication & authorization data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as No. This makes Micro User Service a useful integration candidate when a project needs user management and authentication through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Authentication & Authorization`apiKey`true
MojoAuth logo

MojoAuth

Authentication & Authorization

Free

MojoAuth is an API listed in the Authentication & Authorization category that provides access to secure and modern passwordless authentication platform. It is intended for developers who want to integrate this type of authentication & authorization data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes MojoAuth a useful integration candidate when a project needs secure and modern passwordless authentication platform through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Authentication & Authorization`apiKey`true
SAWO Labs logo

SAWO Labs

Authentication & Authorization

Free

SAWO Labs is an API listed in the Authentication & Authorization category that provides access to simplify login and improve user experience by integrating passwordless authentication in your app. It is intended for developers who want to integrate this type of authentication & authorization data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes SAWO Labs a useful integration candidate when a project needs simplify login and improve user experience by integrating passwordless authentication in your app through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Authentication & Authorization`apiKey`true
Stytch logo

Stytch

Authentication & Authorization

Free

Stytch is an API listed in the Authentication & Authorization category that provides access to user infrastructure for modern applications. It is intended for developers who want to integrate this type of authentication & authorization data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as No. This makes Stytch a useful integration candidate when a project needs user infrastructure for modern applications through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Authentication & Authorization`apiKey`true
Warrant logo

Warrant

Authentication & Authorization

Free

Warrant is an API listed in the Authentication & Authorization category that provides access to aPIs for authorization and access control. It is intended for developers who want to integrate this type of authentication & authorization data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes Warrant a useful integration candidate when a project needs aPIs for authorization and access control through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Authentication & Authorization`apiKey`true
Bitquery logo

Bitquery

Blockchain

Free

Bitquery is an API listed in the Blockchain category that provides access to onchain GraphQL APIs & DEX APIs. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes Bitquery a useful integration candidate when a project needs onchain GraphQL APIs & DEX APIs through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Blockchain`apiKey`true
Chainlink logo

Chainlink

Blockchain

Free

Chainlink is an API listed in the Blockchain category that provides access to build hybrid smart contracts with Chainlink. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes Chainlink a useful integration candidate when a project needs build hybrid smart contracts with Chainlink through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

BlockchainNotrue
Chainpoint logo

Chainpoint

Blockchain

Free

Chainpoint is an API listed in the Blockchain category that provides access to chainpoint is a global network for anchoring data to the Bitcoin blockchain. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes Chainpoint a useful integration candidate when a project needs chainpoint is a global network for anchoring data to the Bitcoin blockchain through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

BlockchainNotrue
Covalent logo

Covalent

Blockchain

Free

Covalent is an API listed in the Blockchain category that provides access to multi-blockchain data aggregator platform. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Covalent a useful integration candidate when a project needs multi-blockchain data aggregator platform through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Blockchain`apiKey`true
Etherscan logo

Etherscan

Blockchain

Free

Etherscan is an API listed in the Blockchain category that provides access to ethereum explorer API. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes Etherscan a useful integration candidate when a project needs ethereum explorer API through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Blockchain`apiKey`true
Helium logo

Helium

Blockchain

Free

Helium is an API listed in the Blockchain category that provides access to helium is a global, distributed network of Hotspots that create public, long-range wireless coverage. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as available. This makes Helium a useful integration candidate when a project needs helium is a global, distributed network of Hotspots that create public, long-range wireless coverage through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

BlockchainNotrue
Nownodes logo

Nownodes

Blockchain

Free

Nownodes is an API listed in the Blockchain category that provides access to blockchain-as-a-service solution that provides high-quality connection via API. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes Nownodes a useful integration candidate when a project needs blockchain-as-a-service solution that provides high-quality connection via API through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Blockchain`apiKey`true
Steem logo

Steem

Blockchain

Free

Steem is an API listed in the Blockchain category that provides access to blockchain-based blogging and social media website. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing indicates that authentication is not required; HTTPS support is listed as unavailable; CORS is listed as No. This makes Steem a useful integration candidate when a project needs blockchain-based blogging and social media website through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

BlockchainNofalse
The Graph logo

The Graph

Blockchain

Free

The Graph is an API listed in the Blockchain category that provides access to indexing protocol for querying networks like Ethereum with GraphQL. It is intended for developers who want to integrate this type of blockchain data or functionality into websites, mobile applications, dashboards, automation workflows, research projects, prototypes, or backend services without building the underlying data source or service from scratch. From the supplied API metadata, the supplied listing identifies apiKey as the authentication method; HTTPS support is listed as available. This makes The Graph a useful integration candidate when a project needs indexing protocol for querying networks like Ethereum with GraphQL through a programmatic interface. Because API capabilities, quotas, authentication rules, endpoints, and availability can change over time, the provider documentation should be treated as the current technical reference.

Blockchain`apiKey`true

Frequently Asked Questions About Free APIs

What are the best free APIs for developers?

The best free APIs include OpenAI API (free tier), GitHub REST API, OpenWeather API, and Alpha Vantage for finance data. Our directory lists hundreds of free APIs across AI, weather, finance, and developer categories.

Do these APIs require a credit card?

Most APIs in our directory offer free tiers that don't require a credit card. Some may require registration for an API key, but you won't be charged for basic usage within their free limits.

How do I integrate these APIs into my project?

Each API listing includes the endpoint URL with a copy button. Click to copy the endpoint, then use it in your HTTP requests. Visit the API's documentation (linked on each page) for authentication details and usage examples.

What's the difference between free and paid API tiers?

Free API tiers typically have rate limits (requests per minute/day) and may offer fewer features. They're perfect for development, testing, and small projects. Paid tiers offer higher limits, more features, and SLAs for production use.

Can I use these APIs for commercial projects?

Most APIs allow commercial use on their free tiers, but check each API's terms of service. Some may require attribution or have specific usage restrictions for commercial applications.