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Public APIs · by APILayerData from public-apis (MIT)
  1. Home
  2. /Machine Learning
  3. /OpenRouter
Machine Learning
OpenRouter logo

OpenRouter

Unified API for 300+ LLMs from OpenAI, Anthropic, Meta, Mistral and more, with a free tier.

OpenRouter API is a free Machine Learning API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.

Authentication
apiKey
HTTPS
Yes
CORS
Yes
Category
Machine Learning
Visit documentation ↗openrouter.ai

About OpenRouter Documentation

Get started with OpenRouter's unified API for hundreds of AI models. Learn how to integrate using the API directly, the Client SDKs, or the Agent SDK.

Provider
OpenRouter Documentation
Website
openrouter.ai ↗

Details from openrouter.ai.

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Unified API suite · now live

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OpenRouter API alternatives

onomeo logo

onomeo

OpenAI-compatible, about 30 free LLMs, 30 calls per 5 hours, optional pay-as-you-go, public beta

apiKeyHTTPSNo CORS
O

OpenVisionAPI

Open source computer vision API based on open source models

No authHTTPSCORS
Not Human Search logo

Not Human Search

AI tool discovery with agentic scoring for 8,600+ tools and MCP servers

No authHTTPSCORS
Perspective logo

Perspective

NLP API to return probability that if text is toxic, obscene, insulting or threatening

apiKeyHTTPSCORS ?
Nonobench logo

Nonobench

Open-source benchmark of how well LLMs solve nonogram puzzles

No authHTTPSCORS
QuelLLM logo

QuelLLM

Open-weight language model catalogue with memory requirements and installation metadata

No authHTTPSCORS

OpenRouter API FAQ

Who provides the OpenRouter API?

The OpenRouter API is provided by OpenRouter Documentation (openrouter.ai). Get started with OpenRouter's unified API for hundreds of AI models. Learn how to integrate using the API directly, the Client SDKs, or the Agent SDK.

Is the OpenRouter API free?

Yes. The OpenRouter API is listed in the Machine Learning category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.

Does the OpenRouter API require an API key?

Yes. The OpenRouter API uses apiKey authentication, so you need to register for credentials before making requests.

Can I call the OpenRouter API from the browser?

Yes. The OpenRouter API supports CORS, so front-end JavaScript can call it directly.

Does the OpenRouter API support HTTPS?

Yes. The OpenRouter API is served over HTTPS, so it's safe to use in production.