resend.com

Resend is an email delivery service for developers focused on transactional and marketing email sending, inbound email handling, and related audience, template, webhook, and automation features. It also provides tooling for terminal and AI-agent workflows.

4 integrations · MCP · REST · CLI

Resend exposes a REST API at api.resend.com, a hosted OAuth-protected MCP server at mcp.resend.com with API-key fallback, and a `resend` CLI; docs also describe SMTP sending via smtp.resend.com using an API key.

discovered 1mo ago

MCP servers1

Resend MCPdetectedstreamable-http

REST · OpenAPI2

Resend REST APIdeclaredrest
Resend SMTPdiscoveredrest

CLI1

Resend CLIdiscoveredresend

Credentials

Resend API keyapi_key$ resend login

Acquired by the CLI — running resend login opens the auth flow and stores the credential.

OAuth 2.0oauth2

OAuth 2.0 — self-onboarding

Point your MCP client at the server URL and approve access in the browser. The server accepts a Client ID Metadata Document (CIMD), so the client authenticates with its own hosted URL as the client_id — nothing to register.

conventions · 7/8 published

integrations.json✓https://resend.com/.well-known/integrations.json
llms.txt✓https://resend.com/llms.txt
API catalog✓https://resend.com/.well-known/api-catalog
OpenAPI document✓https://resend.com/openapi.json
MCP server card✓https://mcp.resend.com/mcp
OAuth protected resource✓https://resend.com/.well-known/oauth-protected-resource
Agent card✗/.well-known/agent-card.json
Agent skills✓https://resend.com/.well-known/agent-skills/index.json

Publish these signals → /publishing