API Overview

The Experiment Plus API is RESTful and returns JSON responses.

Base URL

https://api.experimentplus.io/v1

Authentication

All requests require an API key in the Authorization header:

curl -H "Authorization: Bearer YOUR_API_KEY" \
  https://api.experimentplus.io/v1/flags

Response Format

Successful responses:

{
  "data": { ... },
  "meta": {
    "requestId": "req_abc123"
  }
}

Error responses:

{
  "error": {
    "code": "invalid_request",
    "message": "Missing required field: userId"
  }
}

Rate Limits

Plan	Requests/second
Free	10
Pro	100
Enterprise	Unlimited

Endpoints

Endpoint	Description
Authentication	API keys and auth
Flags	Feature flag operations
Experiments	A/B test management
Events	Event tracking

SDKs

We provide official SDKs:

• JavaScript/TypeScript
• Python
• Go
• Ruby

See Getting Started for installation.