API Reference

Every endpoint, every parameter, every response shape — generated live from our OpenAPI 3.1 spec. The "Try it" panel on each operation runs a real request against your account when you paste an API key.

Base URL https://api.relayly.io Auth X-API-Key: ek_… OpenAPI /v1/openapi.json Postman collection on GitHub

Quick start

Three things to do before your first call:

  1. Sign up free at app.relayly.io and grab an ek_test_ or ek_live_ key from Settings → API Keys.
  2. Verify a sending domain (Domains → New). Test-mode (ek_test_) skips this requirement.
  3. Click Authorize below and paste your key in the X-API-Key field. Then expand any operation and hit Try it.

Prefer prose? The narrative docs are at /docs. The 5-minute first-send guide is at /quickstart.