Koskamo

Ballast MCP

An official MCP server for Ballast cold email software that allows AI agents to manage campaigns, domains, mailboxes, leads, and replies. It provides 30 core tools for tasks like drafting sequences, checking deliverability, and handling the Unibox, with optional full access to all 109 tools.

Visit Ballast

Endpoint and access

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

Ballast MCP logo, by BallastCommunity listingStreamable HTTPOAuth sign-inEndpoint checked 2026-11-01Published by Ballast
You need:A Ballast workspace API key from Settings > API Keys (starts with bl_ )
MCP endpoint (Streamable HTTP)
https://ballast.to/api/mcp
Vendor documentation

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days
  • Popularity 1 GitHub star

What you can do with it

  • Draft and launch cold email sequences
  • Check domain DNS and deliverability health
  • Manage mailboxes and import leads
  • Read and reply to customer threads

Source and maintenance

Community listingRegistry 1.0.2MIT
mcp-registry: io.github.useballast/ballast-mcp@1.0.2Source repositoryProject website
Last repository push
Latest release
v1.0.1
Maintenance checked

Tools

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

No tool definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (11 of 11 answered).

  1. 2026-11-02: 4 of 4 checks answered
  2. 2026-11-03: 4 of 4 checks answered
  3. 2026-11-04: 3 of 3 checks answered

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
487 ms
95th percentile latency
487 ms

Maintenance history

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

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown
  • · probe · passed · 487 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 ballast-mcp https://ballast.to/api/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 ballast-mcp --url https://ballast.to/api/mcp

Cursor

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

Cline

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

VS Code

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

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://ballast.to/api/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": {
    "ballast-mcp": {
      "serverUrl": "https://ballast.to/api/mcp"
    }
  }
}

Let your agent find its tools

Find servers like Ballast MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

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