Resend REST API

REST declared

Details

URL: https://api.resend.com
Spec: https://resend.com/openapi.yaml
Spec (json): https://resend.com/openapi.json
Docs: https://resend.com/docs/api-reference/introduction

Authentication

Resend API key api_key declared Get key ↗

Authorization: Bearer <credential>

Create an API key from the API keys page or follow Create an API key. Choose Sending access for send-only use cases or full access for broader API operations. Resend API keys start with re_; send them as Authorization: Bearer re_..., use them as the SMTP password with username resend, or provide them to the CLI/MCP local server via RESEND_API_KEY.