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 1249-1296 of 1467 APIs
English Random Words
Test Data
English Random Words is an API listed in the Test Data category that provides access to generate English Random Words with Pronunciation. It is intended for developers who want to integrate this type of test data 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 English Random Words a useful integration candidate when a project needs generate English Random Words with Pronunciation 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.
FakeJSON
Test Data
FakeJSON is an API listed in the Test Data category that provides access to service to generate test and fake data. It is intended for developers who want to integrate this type of test data 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 FakeJSON a useful integration candidate when a project needs service to generate test and fake 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.
FakerAPI
Test Data
FakerAPI is an API listed in the Test Data category that provides access to aPIs collection to get fake data. It is intended for developers who want to integrate this type of test data 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 FakerAPI a useful integration candidate when a project needs aPIs collection to get fake 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.
FakeStoreAPI
Test Data
FakeStoreAPI is an API listed in the Test Data category that provides access to fake store rest API for your e-commerce or shopping website prototype. It is intended for developers who want to integrate this type of test data 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 FakeStoreAPI a useful integration candidate when a project needs fake store rest API for your e-commerce or shopping website prototype 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.
GeneradorDNI
Test Data
GeneradorDNI is an API listed in the Test Data category that provides access to data generator API. Profiles, vehicles, banks and cards, etc. It is intended for developers who want to integrate this type of test data 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 GeneradorDNI a useful integration candidate when a project needs data generator API. Profiles, vehicles, banks and cards, etc 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.
ItsThisForThat
Test Data
ItsThisForThat is an API listed in the Test Data category that provides access to generate Random startup ideas. It is intended for developers who want to integrate this type of test data 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 ItsThisForThat a useful integration candidate when a project needs generate Random startup ideas 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.
Loripsum
Test Data
Loripsum is an API listed in the Test Data category that provides access to the "lorem ipsum" generator that doesn't suck. It is intended for developers who want to integrate this type of test data 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 Loripsum a useful integration candidate when a project needs the "lorem ipsum" generator that doesn't suck 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.
Mailsac
Test Data
Mailsac is an API listed in the Test Data category that provides access to disposable Email. It is intended for developers who want to integrate this type of test data 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 Mailsac a useful integration candidate when a project needs disposable Email 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.
Metaphorsum
Test Data
Metaphorsum is an API listed in the Test Data category that provides access to generate demo paragraphs giving number of words and sentences. It is intended for developers who want to integrate this type of test data 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 Metaphorsum a useful integration candidate when a project needs generate demo paragraphs giving number of words and sentences 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.
Mockaroo
Test Data
Mockaroo is an API listed in the Test Data category that provides access to generate fake data to JSON, CSV, TXT, SQL and XML. It is intended for developers who want to integrate this type of test data 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 Mockaroo a useful integration candidate when a project needs generate fake data to JSON, CSV, TXT, SQL and XML 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.
QuickMocker
Test Data
QuickMocker is an API listed in the Test Data category that provides access to API mocking tool to generate contextual, fake or random data. It is intended for developers who want to integrate this type of test data 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 QuickMocker a useful integration candidate when a project needs API mocking tool to generate contextual, fake or random 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.
Random Data
Test Data
Random Data is an API listed in the Test Data category that provides access to random data generator. It is intended for developers who want to integrate this type of test data 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 Random Data a useful integration candidate when a project needs random data 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.
Randommer
Test Data
Randommer is an API listed in the Test Data category that provides access to random data generator. It is intended for developers who want to integrate this type of test data 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 Randommer a useful integration candidate when a project needs random data 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.
RandomUser
Test Data
RandomUser is an API listed in the Test Data category that provides access to generates and list user data. It is intended for developers who want to integrate this type of test data 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 RandomUser a useful integration candidate when a project needs generates and list user 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.
RoboHash
Test Data
RoboHash is an API listed in the Test Data category that provides access to generate random robot/alien avatars. It is intended for developers who want to integrate this type of test data 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 RoboHash a useful integration candidate when a project needs generate random robot/alien avatars 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.
Spanish random names
Test Data
Spanish random names is an API listed in the Test Data category that provides access to generate spanish names (with gender) randomly. It is intended for developers who want to integrate this type of test data 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 Spanish random names a useful integration candidate when a project needs generate spanish names (with gender) randomly 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.
Spanish random words
Test Data
Spanish random words is an API listed in the Test Data category that provides access to generate spanish words randomly. It is intended for developers who want to integrate this type of test data 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 Spanish random words a useful integration candidate when a project needs generate spanish words randomly 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.
This Person Does not Exist
Test Data
This Person Does not Exist is an API listed in the Test Data category that provides access to generates real-life faces of people who do not exist. It is intended for developers who want to integrate this type of test data 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 This Person Does not Exist a useful integration candidate when a project needs generates real-life faces of people who do not exist 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.
Toolcarton
Test Data
Toolcarton is an API listed in the Test Data category that provides access to generate random testimonial data. It is intended for developers who want to integrate this type of test data 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 Toolcarton a useful integration candidate when a project needs generate random testimonial 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.
UUID Generator
Test Data
UUID Generator is an API listed in the Test Data category that provides access to generate UUIDs. It is intended for developers who want to integrate this type of test data 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 UUID Generator a useful integration candidate when a project needs generate UUIDs 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.
What The Commit
Test Data
What The Commit is an API listed in the Test Data category that provides access to random commit message generator. It is intended for developers who want to integrate this type of test data 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 Yes. This makes What The Commit a useful integration candidate when a project needs random commit message 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.
Yes No
Test Data
Yes No is an API listed in the Test Data category that provides access to generate yes or no randomly. It is intended for developers who want to integrate this type of test data 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 Yes No a useful integration candidate when a project needs generate yes or no randomly 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.
Code Detection API
Text Analysis
Code Detection API is an API listed in the Text Analysis category that provides access to detect, label, format and enrich the code in your app or in your data pipeline. It is intended for developers who want to integrate this type of text analysis 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 Code Detection API a useful integration candidate when a project needs detect, label, format and enrich the code in your app or in your data pipeline 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.
apilayer languagelayer
Text Analysis
apilayer languagelayer is an API listed in the Text Analysis category that provides access to language Detection JSON API supporting 173 languages. It is intended for developers who want to integrate this type of text analysis 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 apilayer languagelayer a useful integration candidate when a project needs language Detection JSON API supporting 173 languages 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.
Aylien Text Analysis
Text Analysis
Aylien Text Analysis is an API listed in the Text Analysis category that provides access to a collection of information retrieval and natural language APIs. It is intended for developers who want to integrate this type of text analysis 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 Aylien Text Analysis a useful integration candidate when a project needs a collection of information retrieval and natural language 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.
Audexum
Text Analysis
Audexum is an API listed in the Text Analysis category that provides access to text-to-speech REST API with 43 voices and 33 languages. It is intended for developers who want to integrate this type of text analysis 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 Audexum a useful integration candidate when a project needs text-to-speech REST API with 43 voices and 33 languages 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.
Cloudmersive Natural Language Processing
Text Analysis
Cloudmersive Natural Language Processing is an API listed in the Text Analysis category that provides access to natural language processing and text analysis. It is intended for developers who want to integrate this type of text analysis 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 Cloudmersive Natural Language Processing a useful integration candidate when a project needs natural language processing and text 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.
Detect Language
Text Analysis
Detect Language is an API listed in the Text Analysis category that provides access to detects text language. It is intended for developers who want to integrate this type of text analysis 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 Detect Language a useful integration candidate when a project needs detects text language 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.
ELI
Text Analysis
ELI is an API listed in the Text Analysis category that provides access to natural Language Processing Tools for Thai Language. It is intended for developers who want to integrate this type of text analysis 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 ELI a useful integration candidate when a project needs natural Language Processing Tools for Thai Language 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.
Google Cloud Natural
Text Analysis
Google Cloud Natural is an API listed in the Text Analysis category that provides access to natural language understanding technology, including sentiment, entity and syntax analysis. It is intended for developers who want to integrate this type of text analysis 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 Cloud Natural a useful integration candidate when a project needs natural language understanding technology, including sentiment, entity and syntax 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.
GeoScore
Text Analysis
GeoScore is an API listed in the Text Analysis category that provides access to score content for AI search citation readiness. Returns a 0-100 GEO score, 8 structural metrics, and improvement fixes. It is intended for developers who want to integrate this type of text analysis 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 GeoScore a useful integration candidate when a project needs score content for AI search citation readiness. Returns a 0-100 GEO score, 8 structural metrics, and improvement fixes 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.
Hirak OCR
Text Analysis
Hirak OCR is an API listed in the Text Analysis category that provides access to image to text -text recognition- from image more than 100 language, accurate, unlimited requests. It is intended for developers who want to integrate this type of text analysis 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 Hirak OCR a useful integration candidate when a project needs image to text -text recognition- from image more than 100 language, accurate, unlimited requests 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.
Hirak Translation
Text Analysis
Hirak Translation is an API listed in the Text Analysis category that provides access to translate between 21 of most used languages, accurate, unlimited requests. It is intended for developers who want to integrate this type of text analysis 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 Hirak Translation a useful integration candidate when a project needs translate between 21 of most used languages, accurate, unlimited requests 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.
Lecto Translation
Text Analysis
Lecto Translation is an API listed in the Text Analysis category that provides access to translation API with free tier and reasonable prices. It is intended for developers who want to integrate this type of text analysis 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 Lecto Translation a useful integration candidate when a project needs translation API with free tier and reasonable prices 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.
LibreTranslate
Text Analysis
LibreTranslate is an API listed in the Text Analysis category that provides access to translation tool with 17 available languages. It is intended for developers who want to integrate this type of text analysis 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 LibreTranslate a useful integration candidate when a project needs translation tool with 17 available languages 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.
Semantria
Text Analysis
Semantria is an API listed in the Text Analysis category that provides access to text Analytics with sentiment analysis, categorization & named entity extraction. It is intended for developers who want to integrate this type of text analysis 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 Semantria a useful integration candidate when a project needs text Analytics with sentiment analysis, categorization & named entity extraction 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.
Sentiment Analysis
Text Analysis
Sentiment Analysis is an API listed in the Text Analysis category that provides access to multilingual sentiment analysis of texts from different sources. It is intended for developers who want to integrate this type of text analysis 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 Sentiment Analysis a useful integration candidate when a project needs multilingual sentiment analysis of texts from different sources 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.
Tisane
Text Analysis
Tisane is an API listed in the Text Analysis category that provides access to text Analytics with focus on detection of abusive content and law enforcement applications. It is intended for developers who want to integrate this type of text analysis 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; CORS is listed as Yes. This makes Tisane a useful integration candidate when a project needs text Analytics with focus on detection of abusive content and law enforcement 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.
Watson Natural Language Understanding
Text Analysis
Watson Natural Language Understanding is an API listed in the Text Analysis category that provides access to natural language processing for advanced text analysis. It is intended for developers who want to integrate this type of text analysis 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 Watson Natural Language Understanding a useful integration candidate when a project needs natural language processing for advanced text 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.
Aftership
Tracking
Aftership is an API listed in the Tracking category that provides access to API to update, manage and track shipment efficiently. It is intended for developers who want to integrate this type of tracking 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 Aftership a useful integration candidate when a project needs API to update, manage and track shipment efficiently 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.
Correios
Tracking
Correios is an API listed in the Tracking category that provides access to integration to provide information and prepare shipments using Correio's services. It is intended for developers who want to integrate this type of tracking 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 Correios a useful integration candidate when a project needs integration to provide information and prepare shipments using Correio's services 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.
Pixela
Tracking
Pixela is an API listed in the Tracking category that provides access to API for recording and tracking habits or effort, routines. It is intended for developers who want to integrate this type of tracking 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 X-Mashape-Key as the authentication method; HTTPS support is listed as available; CORS is listed as Yes. This makes Pixela a useful integration candidate when a project needs API for recording and tracking habits or effort, routines 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.
PostalPinCode
Tracking
PostalPinCode is an API listed in the Tracking category that provides access to API for getting Pincode details in India. It is intended for developers who want to integrate this type of tracking 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 PostalPinCode a useful integration candidate when a project needs API for getting Pincode details in India 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.
Postmon
Tracking
Postmon is an API listed in the Tracking category that provides access to an API to query Brazilian ZIP codes and orders easily, quickly and free. It is intended for developers who want to integrate this type of tracking 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 Postmon a useful integration candidate when a project needs an API to query Brazilian ZIP codes and orders easily, quickly and free 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.
PostNord
Tracking
PostNord is an API listed in the Tracking category that provides access to provides information about parcels in transport for Sweden and Denmark. It is intended for developers who want to integrate this type of tracking 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 PostNord a useful integration candidate when a project needs provides information about parcels in transport for Sweden and Denmark 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.
UPS
Tracking
UPS is an API listed in the Tracking category that provides access to shipment and Address information. It is intended for developers who want to integrate this type of tracking 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 UPS a useful integration candidate when a project needs shipment and Address information 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.
WeCanTrack
Tracking
WeCanTrack is an API listed in the Tracking category that provides access to automatically place subids in affiliate links to attribute affiliate conversions to click data. It is intended for developers who want to integrate this type of tracking 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 WeCanTrack a useful integration candidate when a project needs automatically place subids in affiliate links to attribute affiliate conversions to click 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.
WhatPulse
Tracking
WhatPulse is an API listed in the Tracking category that provides access to small application that measures your keyboard/mouse usage. It is intended for developers who want to integrate this type of tracking 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 WhatPulse a useful integration candidate when a project needs small application that measures your keyboard/mouse usage 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.
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.