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Development APIs

Find APIs that support developer workflows, application integrations and testing. Start with the task your application needs to perform, then compare access requirements and documentation.

220APIs

1Categories

107No Authentication

218HTTPS Supported

Browse all 52 categories

APILayer APIs17 Animals24 Anime20 Anti-Malware17 Art & Design31 Authentication & Authorization7 Blockchain18 Books26 Business47 Calendar22 Cloud Storage & File Sharing19 Continuous Integration6 Cryptocurrency96 Currency Exchange27 Data Validation16 Development220 Dictionaries15 Documents & Productivity53 Email38 Entertainment19 Environment30 Events5 Finance97 Food & Drink36 Games & Comics111 Geocoding112 Government126 Health47 Jobs37 Machine Learning54 Music36 News26 Open Data79 Open Source Projects11 Patent4 Personality27 Phone8 Photography38 Programming5 Science & Math59 Security61 Shopping28 Social58 Sports & Fitness66 Test Data37 Text Analysis20 Tracking11 Transportation97 URL Shorteners21 Vehicle16 Video58 Weather47

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220 matching APIs · Loading full catalog…

Source listed

24 Pull Requests

Development

Project to promote open source collaboration during December

Auth: No Auth
HTTPS: Yes
CORS: Yes

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Source listed

Aether Bridge

Development

Autonomous agent team management and API workflow orchestration

Auth: API Key
HTTPS: Yes
CORS: Unknown

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Agent Nexus

Development

Continuously probed registry of APIs, MCP servers and CLIs callable by agents

Auth: No Auth
HTTPS: Yes
CORS: Yes

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AgentPay Domain Lookup

Development

DNS records, WHOIS/RDAP, IP ownership and domain reports for AI agents, paid per call via x402

Auth: No Auth
HTTPS: Yes
CORS: Yes

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Source listed

Agify.io

Development

Estimates the age from a first name

Auth: No Auth
HTTPS: Yes
CORS: Yes

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Allscreenshots

Development

Website screenshots and PDFs with full-page capture, dark mode and ad blocking

Auth: API Key
HTTPS: Yes
CORS: No

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Source listed

Amazonscraperapi

Development

Amazon product, search & batch scraping API with residential proxies (1000 free)

Auth: API Key
HTTPS: Yes
CORS: No

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AmberOne

Development

Turn any website into a build-ready Android, iOS, PWA or Electron app project

Auth: API Key
HTTPS: Yes
CORS: No

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AnswerLine

Development · Machine Learning

Answers, citations and sources from AI assistants and Google surfaces through one API

Auth: API Key
HTTPS: Yes
CORS: Yes

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API Grátis

Development

Multiples services and public APIs

Auth: No Auth
HTTPS: Yes
CORS: Unknown

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API Tool Calls

Development

API Tool Calls: Home cost planners, page to Markdown, SEO checks and recalls

Auth: No Auth
HTTPS: Yes
CORS: No

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ApicAgent

Development

Extract device details from user-agent string

Auth: No Auth
HTTPS: Yes
CORS: Yes

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ApiFlash

Development

Chrome based screenshot API for developers

Auth: API Key
HTTPS: Yes
CORS: Unknown

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APIs.guru

Development

Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs

Auth: No Auth
HTTPS: Yes
CORS: Unknown

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APIzone

Development

Independent uptime & status monitoring for 200+ popular APIs

Auth: No Auth
HTTPS: Yes
CORS: Yes

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Aquanode

Development

Live GPU rental prices and availability across nine cloud providers

Auth: No Auth
HTTPS: Yes
CORS: No

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Azure DevOps

Development

The Azure DevOps basic components of a REST API request/response pair

Auth: API Key
HTTPS: Yes
CORS: Unknown

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Base

Development

Building quick backends

Auth: API Key
HTTPS: Yes
CORS: Yes

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Beeceptor

Development

Build a mock Rest API endpoint in seconds

Auth: No Auth
HTTPS: Yes
CORS: Yes

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Source listed

Bitbucket

Development

Bitbucket API

Auth: OAuth
HTTPS: Yes
CORS: Unknown

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Blague.xyz

Development

La plus grande API de Blagues FR/The biggest FR jokes API

Auth: API Key
HTTPS: Yes
CORS: Yes

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Source listed

Blitapp

Development

Schedule screenshots of web pages and sync them to your cloud

Auth: API Key
HTTPS: Yes
CORS: Unknown

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Blynk-Cloud

Development

Control IoT Devices from Blynk IoT Cloud

Auth: API Key
HTTPS: No
CORS: Unknown

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Source listed

Bored

Development

Find random activities to fight boredom

Auth: No Auth
HTTPS: Yes
CORS: Unknown

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Before you integrate

Separate read-only lookups from operations that change a project or account.
Check pagination, error responses and versioning before coupling an application to a service.
Keep production credentials on a trusted backend; a public directory entry does not make a key safe to publish.

Source synchronized 2026-10-26 · Revision 82e763ed · Report a source problem