API Reference

Core Endpoints

GET /api/v2/users

Retrieve user information with optional filters by ID or username.

Query Params id: string, username: string

POST /api/v2/actions

Trigger system actions with required payload and authentication.

Headers Authorization: Bearer [token], Content-Type: application/json

Authentication

OAuth 2.0 Flow

Request Authorization Code to your redirect URI
Obtain Access Token via Client Credentials
Use Bearer Token in Authorization Header

Code Example (Python)

{'import requests

headers = {
    "Authorization": "Bearer YOUR_ACCESS_TOKEN",
    "Content-Type": "application/json"
}

response = requests.get("https://api.epsilon.com/users/12345", headers=headers)

if response.status_code == 200:
    print(response.json())
else:
    print(f"Error: {response.status_code}")
}'}

Rate Limiting

Hard Limit

1000 requests/minute per client

Soft Limit

900 requests/minute with warning headers

HTTP Status Mapping

Code	Description
200	Successful request
401	Authentication required
429	Too many requests
503	Service temporarily unavailable

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API Endpoint Reference