Developer docs

Mercury MCP integration

Mercury's official MCP server (Beta) for read-only access to your Mercury…

Updated July 2026

Provider
mercury_mcp
Category
Other
Setup
See setup section below

Quick start

Call Mercury MCP from your generated app's worker code via the OverSkill composio client. The toolkit slug below maps to Mercury MCP's public Composio identifier — your app references it by name and OverSkill handles the OAuth round-trip.

// In your generated app's worker handler:
const composio = composioClient(env);

const result = await composio.execute(
  "MERCURY_MCP_ACTION_NAME",
  { /* action parameters — see Actions section below */ }
);

return new Response(JSON.stringify(result), {
  headers: { "Content-Type": "application/json" }
});

Replace ACTION_NAME with one of the slugs listed in the Actions section below. The composio client handles auth + rate limits automatically — no API key is exposed to user code.

Setup

Setup details for Mercury MCP aren't published yet. If you need this integration in production, contact the OverSkill team and we'll prioritize it.

Build with Mercury MCP

Open OverSkill, describe what you want to build, and reference Mercury MCP in your prompt — the AI will wire up the integration automatically.