DOCUMENTATION

Developer documentation

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rocket_launch

Getting Started

Set up your account, keys and first request in minutes.

6 ARTICLES
key

Authentication

API keys, OAuth, scopes and rotating credentials safely.

4 ARTICLES
api

API Reference

Every endpoint, parameter and response, with examples.

38 ENDPOINTS
smart_toy

AI & Models

Models, prompting, RAG and streaming responses.

9 ARTICLES
webhook

Webhooks

Subscribe to events and verify signatures.

5 ARTICLES
code

SDKs

Official libraries for Node, Python and Go.

3 SDKS

Quick start

Authenticate, make your first request, and stream results. The API is REST + JSON with SDKs for Node, Python and Go.

request.sh
curl https://api.functionx.dev/v1/complete \
  -H "Authorization: Bearer $FX_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "model": "fx-1", "input": "Hello" }'