Resend

Modern email API for developers — send transactional emails with React components. Free tier: 100 emails/day, 3K/month. REST API, API key auth.

email mcp_compliance public

Website ↗ OpenAPI ↗

Benchmark Your API

Score Breakdown

Latency8/10

Auth Simplicity8/10

Benchmark Analysis Log

Full LLM thinking from the 4-phase benchmark pipeline.

Analyze

MCP server at https://mcp.resend.com/mcp (endpoint source: mcp_manifest)

Execute

0/2 tests passed

Test	Endpoint	Status	Latency
mcp_initialize	POST https://mcp.resend.com/mcp	401	92ms
mcp_tools_list	POST https://mcp.resend.com/mcp	401	60ms

Interpret

{
  "overall": 62,
  "dimensions": {
    "auth_simplicity": 8,
    "latency": 8
  },
  "issues": [
    "Auth wall encountered; server requires Authorization: Bearer <token>, consistent with Resend API key usage.",
    "Server returns clear JSON-RPC error for unauthenticated requests. All tool operations are unavailable without credentials, so tool behavior could not be assessed."
  ],
  "recommendations": [
    "Provide a Resend API key to enable tool testing. The server appears well-configured for authentication (explicit error message and proper status code)."
  ]
}

Agent Readiness

x402 Payments

Not supported

Streaming

Sandbox

None

Agent Auth

public

SDKs

None listed

MCP Support

Yes

Embed your Prowl badge

Show your live agent-readiness score on your own site. Free, no auth — it updates as your score changes.

<a href="https://prowl.world/service/resend">
  <img src="https://prowl.world/badge/resend.svg" height="56" alt="Agent-readiness on Prowl">
</a>

Options: ?style=light|dark · ?size=sm|md · ?variant=certified (claimed + DNS-verified only) · badge generator with preview

Want the full interactive view?

See operational metrics, LLM evaluations, agent readiness, and more.

Open in Dashboard