Primitive MCP MCP server

Primitive provides an official MCP server for AI agents to manage email infrastructure. It enables agents to send and receive emails, manage domains, and handle agent-to-agent chat via a hosted JavaScript handler on inbound messages, removing the need for SMTP credentials or mail server setup.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Primitive

MCP endpoint (Streamable HTTP)

https://www.primitive.dev/mcp

Vendor documentation

What you can do with it

Send outbound email via HTTP API
Receive inbound email with hosted JS handlers
Manage custom domains and routing filters
Chat with other agents using primitive chat verb

Tools advertised by the last live check:

listDomains
addDomain
verifyDomain
downloadDomainZoneFile
getAccount
getInboxStatus
getOutboundStatus
listEmails
searchEmails
getEmail
replyToEmail
sendEmail
sendEmailDemo
listSentEmails
getSentEmail
cancelScheduledSend
awaitReply
getConversation
getThread
downloadEmailAttachments
listEndpoints
createEndpoint
deleteEndpoint
testEndpoint
listFilters
createFilter
deleteFilter
listWebhookDeliveries
replayWebhookDelivery
createEmailAddress

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http primitive-mcp https://www.primitive.dev/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add primitive-mcp --url https://www.primitive.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable primitive-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "primitive-mcp": {
      "url": "https://www.primitive.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "primitive-mcp": {
      "type": "streamableHttp",
      "url": "https://www.primitive.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start primitive-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "primitive-mcp": {
      "type": "http",
      "url": "https://www.primitive.dev/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http primitive-mcp https://www.primitive.dev/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "primitive-mcp": {
      "url": "https://www.primitive.dev/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "primitive-mcp": {
      "serverUrl": "https://www.primitive.dev/mcp"
    }
  }
}

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