Koskamo

Colding MCP

An official MCP server provided by Colding that allows AI agents to send and read emails through connected mailboxes, warm up new addresses, verify email addresses, run outreach campaigns, and send transactional receipts or access links.

Visit Colding

Endpoint and access

OAuth sign-in: the first time you connect, your client opens the vendor's own authorization prompt in a browser.

Colding MCP logo, by ColdingVendor evidenceStreamable HTTPOAuth sign-inEndpoint checked 2026-11-01Operated by Colding
You need:You need a colding account our team opened, and a workspace you own.Only the workspace owner can connect an agent or make an API key.Read calls work right away. Calls that send email or reach another server wait until the workspace owner accepts the acceptable use policy in Settings.
MCP endpoint (Streamable HTTP)
https://api.colding.app/mcp
Vendor documentation

What you can do with it

  • Send and read emails via connected mailboxes
  • Warm up new email addresses to avoid spam
  • Run email outreach campaigns
  • Verify email addresses

Source and maintenance

Vendor evidenceRegistry 1.0.1
mcp-registry: app.colding/colding@1.0.1Project website

Tools

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

No tool definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
373 ms
95th percentile latency
373 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 373 ms · metadata changed · refuses unauthenticated initialize (HTTP 401)

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 the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http colding-mcp https://api.colding.app/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 colding-mcp --url https://api.colding.app/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable colding-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "colding-mcp": {
      "url": "https://api.colding.app/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "colding-mcp": {
      "type": "streamableHttp",
      "url": "https://api.colding.app/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start colding-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "colding-mcp": {
      "type": "http",
      "url": "https://api.colding.app/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 colding-mcp https://api.colding.app/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": {
    "colding-mcp": {
      "url": "https://api.colding.app/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": {
    "colding-mcp": {
      "serverUrl": "https://api.colding.app/mcp"
    }
  }
}

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Do you run Colding MCP?

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