send0 MCP

The send0 MCP server provides tools for AI agents to manage email inboxes, including creating addresses, waiting for incoming emails, reading message threads, and sending replies. It supports both remote and local execution modes.

Visit send0

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by send0

You need:You need a send0 API key.

Vendor documentation

What you can do with it

Create a dedicated email inbox for an agent
Wait for and extract verification codes from emails
Read email threads and summarize content
Reply to emails within existing threads

Source and maintenance

Community listingRegistry 0.2.1

mcp-registry: io.github.send0-dev/send0@0.2.1 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@send0/mcp 0.2.1

npm

@send0/mcp package definition

{
  "version": "0.2.1",
  "transport": "stdio",
  "identifier": "@send0/mcp",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "SEND0_API_KEY",
      "isRequired": true,
      "description": "send0 API key (s0_live_…), from https://app.send0.dev"
    },
    {
      "name": "SEND0_INBOX_ID",
      "description": "Default inbox (ibx_…) for tools that take an inbox_id"
    },
    {
      "name": "SEND0_BASE_URL",
      "default": "https://api.send0.dev",
      "description": "API base URL, for a self-hosted send0"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before 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.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "send0-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@send0/mcp@0.2.1"
      ],
      "env": {
        "SEND0_API_KEY": "<YOUR_SEND0_API_KEY>",
        "SEND0_INBOX_ID": "<YOUR_SEND0_INBOX_ID>",
        "SEND0_BASE_URL": "<YOUR_SEND0_BASE_URL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "send0-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@send0/mcp@0.2.1"
      ],
      "env": {
        "SEND0_API_KEY": "<YOUR_SEND0_API_KEY>",
        "SEND0_INBOX_ID": "<YOUR_SEND0_INBOX_ID>",
        "SEND0_BASE_URL": "<YOUR_SEND0_BASE_URL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "send0-mcp-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@send0/mcp@0.2.1"
      ],
      "env": {
        "SEND0_API_KEY": "<YOUR_SEND0_API_KEY>",
        "SEND0_INBOX_ID": "<YOUR_SEND0_INBOX_ID>",
        "SEND0_BASE_URL": "<YOUR_SEND0_BASE_URL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "send0-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@send0/mcp@0.2.1"
      ],
      "env": {
        "SEND0_API_KEY": "<YOUR_SEND0_API_KEY>",
        "SEND0_INBOX_ID": "<YOUR_SEND0_INBOX_ID>",
        "SEND0_BASE_URL": "<YOUR_SEND0_BASE_URL>"
      }
    }
  }
}

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