AI · MCP · New

Give your agent the keys to your email

Point any Model Context Protocol client at Unitpost's hosted server and it gets native tools to send email, run campaigns, verify domains, and manage contacts — every call gated by a scoped, revocable API key. No install, no glue code.

Start free Set up your client

Hosted at mcp.unitpost.com/mcp

mcp.json

{
  "mcpServers": {
    "unitpost": {
      "url": "https://mcp.unitpost.com/mcp",
      "headers": {
        "Authorization": "Bearer pk_live_your_key"
      }
    }
  }
}

Full setup guide

What the agent can do

Every API operation, as an MCP tool

The MCP server is the real /api/v1 surface, one tool at a time — and it runs through the exact same pipeline as the REST API, so nothing is a second-class path.

One tool per API operation

The server advertises emails_send, emails_send_batch, campaigns_send, domains_verify, contacts_create, and the rest — the full /api/v1 surface, mirrored from the OpenAPI spec.

Scoped, revocable keys

Agents authenticate with the same pk_live_ key as the REST API. Each tool enforces its own scope, so an agent only gets what you grant.

Same send gate

Every tool call runs the same chain as the API — rate limits, suppression, verified-domain checks, idempotency, billing.

Full observability

MCP sends land in your Activity view and fire the same signed webhooks — you see exactly what an agent did.

Streamable HTTP

A hosted, streamable-HTTP MCP server — nothing to install or run. Point a client at the URL and it connects.

Pairs with the skill

Add the Agent Skill and your agent also learns how to use the tools correctly — the server gives the tools, the skill teaches the how.

In practice

Watch your agent make real calls

Every tool maps to a real /api/v1 operation. Here's what the agent actually invokes — same arguments, same validation, same result you'd get from the SDK.

{
  "tool": "emails_send",
  "arguments": {
    "from": "you@acme.com",
    "to": "user@example.com",
    "subject": "Welcome to Acme",
    "html": "<p>Thanks for signing up!</p>"
  }
}

Works with your agent

Set up in a minute, in any client

Cursor, Claude, Codex, Copilot, Gemini, Windsurf, or your own agent — each has a copy-paste config pointed at the hosted server. Pick yours for step-by-step setup.

Cursor

Add Unitpost as an MCP server in Cursor so the agent can send + manage email.

Claude Code

Add Unitpost to Claude Code with a single `claude mcp add` command.

Claude Desktop

Connect Unitpost to Claude Desktop as an MCP server.

Codex

Add the Unitpost MCP server to OpenAI Codex CLI.

GitHub Copilot (VS Code)

Use the Unitpost MCP server with VS Code agent mode / Copilot MCP.

Gemini CLI

Register Unitpost as an MCP server for the Gemini CLI.

Windsurf

Register Unitpost as an MCP server in Windsurf (Cascade).

Generic / custom client

Connect any MCP-compatible client or your own agent to Unitpost.

Start sending email your users actually receive

Create a key, verify a domain, and send your first email in minutes — over the API or right from the dashboard.

Get started free Explore the docs