Hosted MCP server and public REST API — the AI of your choice, with the rights you tick.

Connect Mailcheer to your AI agent.

For every tool — ChatGPT, Claude, Cursor, VS Code and the rest — the server address, the connection type and a one-click add button where it exists.

One address

MCP server:

https://mailcheer.com/api/mcp

The same address for every AI client. The difference is in the connection: via account (OAuth) for web interfaces — you pick the workspace and the rights, no key ever goes through the conversation — or via API key for developer tools.

All compatible AI clients

Grouped by publisher. OAuth tools connect through "Sign in with Mailcheer": you pick the workspace and the rights, no key ever goes through the conversation.

OpenAI

ChatGPTOAuth

Custom connector in developer mode. Sign in to Mailcheer, pick the workspace and rights, and run your lists and campaigns right from the conversation.

Settings → Apps & Connectors → enable Developer Mode
New connector → URL: https://mailcheer.com/api/mcp
A Mailcheer page opens — pick the workspace and rights

Codex CLIAPI key

The same MCP server on the Codex side — CLI as well as app — to chain writing, testing and sending without switching tools.

# ~/.codex/config.toml
[mcp_servers.mailcheer]
url = "https://mailcheer.com/api/mcp"
bearer_token_env_var = "MAILCHEER_API_KEY"

Create your key under Settings → API. Export it: export MAILCHEER_API_KEY=mch_live_…

Install guide

Anthropic

Claude (web, desktop, mobile)OAuth

Custom connector in Customize → Connectors. Works across all Anthropic surfaces — claude.ai, the desktop app and the mobile app.

Customize → Connectors → Add custom connector
Name: Mailcheer · URL: https://mailcheer.com/api/mcp
Click Connect — a Mailcheer page opens

Claude CodeOAuth or key

MCP server connected in one command from the CLI. OAuth with no key, or API key in the Authorization header.

# OAuth (recommended)
claude mcp add --transport http mailcheer \
  https://mailcheer.com/api/mcp
claude mcp login mailcheer

# Or with an API key
claude mcp add --transport http mailcheer \
  https://mailcheer.com/api/mcp \
  --header "Authorization: Bearer mch_live_…"

Install guide

Anysphere

CursorOAuth or key

Declared in mcp.json or added with one click. Automatic OAuth if no header is provided; API key in the Authorization field otherwise.

// .cursor/mcp.json
{
  "mcpServers": {
    "mailcheer": {
      "url": "https://mailcheer.com/api/mcp"
    }
  }
}

Add to Cursor

Microsoft

VS Code + GitHub CopilotOAuth

Native support from VS Code 1.101 with GitHub Copilot. Automatic OAuth triggered by the URL alone.

// .vscode/mcp.json
{
  "servers": {
    "mailcheer": {
      "type": "http",
      "url": "https://mailcheer.com/api/mcp"
    }
  }
}

Install in VS Code

Google

Gemini CLIOAuth or key

Declared in the JSON config file, with automatic OAuth discovery or a Bearer key.

// ~/.gemini/settings.json
{
  "mcpServers": {
    "mailcheer": {
      "httpUrl": "https://mailcheer.com/api/mcp"
    }
  }
}

Add the block above to ~/.gemini/settings.json
Inside the Gemini CLI session, type /mcp auth mailcheer for the OAuth flow

Cognition

Windsurf / DevinOAuth or key

Declared in Windsurf's MCP config file. Automatic OAuth if no header is provided.

// ~/.config/devin/mcp_config.json
{
  "mcpServers": {
    "mailcheer": {
      "serverUrl": "https://mailcheer.com/api/mcp"
    }
  }
}

JetBrains

AI AssistantOAuth or key

Added from the IDE settings. Automatic OAuth or key in the Authorization field.

// Settings → Tools → AI Assistant → Model Context Protocol (MCP)
{
  "mcpServers": {
    "mailcheer": {
      "url": "https://mailcheer.com/api/mcp"
    }
  }
}

Zed Industries

ZedOAuth or key

Declared in Zed's global settings. OAuth handled automatically if no header is provided.

// ~/.config/zed/settings.json
{
  "context_servers": {
    "mailcheer": {
      "url": "https://mailcheer.com/api/mcp"
    }
  }
}

Block

GooseOAuth

Block's open-source agent. Added with one click or from the GUI. Automatic OAuth.

Add to Goose

Mistral

Le Chat / VibeOAuth or key

Custom connector in the Work section. Compatible with OAuth, Bearer key or no authentication.

Work → Connectors → Add custom MCP
URL: https://mailcheer.com/api/mcp

Your tool accepts a remote MCP server but isn't listed here? The same address is all it needs: https://mailcheer.com/api/mcp

And without an agent?

Everything can be done by hand too, in the interface: 3,000 emails a month on the free plan, no credit card. Your list, forms, imports, campaigns and their sending need no agent at all.

The writing assistant needs no agent either: it suggests subject lines, rewrites a passage, drafts a letter — without ever using up your sending credits, which are counted separately.

The assistant is billed at actual cost, in euros per month — not credits no one can value.

How the assistant is built →

Get started

Create an account, add your sending domain, then give the address to your AI: connecting takes one step. 3,000 sends a month free, no credit card.

Create my free account Read the FAQ

Once your account exists, Settings → API creates your keys, cuts the ones you no longer want, and shows what your agents actually did.