MailCannon

Free follow-up automation for agency owners

Official application name: MailCannon

Stop losing warm leads between calls. Connect your Gmail, build a follow-up sequence once, and MailCannon keeps every prospect warm across every client — automatically. Free, no catch.

Why Agencies Choose MailCannon

No monthly fees and no shared sending pools that tank your deliverability — MailCannon runs through your own Gmail account, so every email looks and feels like it came straight from you.

Securely connected via Google OAuth. Hosted at thinkandautomate.dev.

🤝

Never Drop a Client Thread

Every follow-up sends from your real Gmail address — no cold-looking blasts, just personal outreach that scales cleanly across every client account.

📊

See What's Actually Working

Opens, bounces, and replies at a glance — know exactly which sequence is winning new business and which one needs a rewrite.

⚡

Set It Once, Forget It

Build multi-step sequences with built-in delays — write it once and MailCannon keeps every client's pipeline warm while you focus on the work.

How to connect your Gmail →

🔌

Remote API (MCP)

MailCannon exposes a remote MCP server for programmatic access to contacts, campaigns, scheduling, and deliverability. Compatible with any MCP client — Claude Desktop, opencode, Cursor, and custom integrations.

Available Operations

add_contact add_contacts list_contacts remove_contact create_campaign add_campaign_step list_campaigns schedule_campaign list_schedules process_campaigns add_provider list_providers remove_provider get_deliverability

Configuration

Add this to your MCP client configuration:

// opencode.json
{
  "mcpServers": {
    "mailcannon": {
      "type": "remote",
      "url": "https://www.thinkandautomate.dev/api/mcp",
      "auth": { "bearer": "<your-api-key>" }
    }
  }
}

// claude_desktop_config.json
{
  "mcpServers": {
    "mailcannon": {
      "command": "npx",
      "args": ["mcp-remote", "https://www.thinkandautomate.dev/api/mcp", "--header", "Authorization: Bearer <your-api-key>"]
    }
  }
}

Get Your API Key

Sign in to the dashboard
Click the 🔑 button in the navigation bar
Click Generate New Key and copy the key
Use it as the bearer value in your configuration

Want help using MailCannon with Claude, Cursor, or opencode?

Book a setup call ($99) →

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