sharpspring-mcp-server

An open-source MCP (Model Context Protocol) server for the SharpSpring API, now branded Constant Contact Lead Gen & CRM. It lets any MCP-compatible AI client (Claude Desktop, Claude Code, Cursor, etc.) read and write Leads, discover custom fields, and call any other documented SharpSpring API method.

This is an independent, community project. It is not affiliated with, endorsed by, or supported by SharpSpring or Constant Contact.

Design goals

• No account-specific configuration baked in. Every credential comes from environment variables at runtime. No hardcoded custom field names, account IDs, or other values belonging to any one SharpSpring account.

• Generic by default. Tools map to SharpSpring's standard, documented API methods and object shapes only — nothing bespoke.

• Custom fields stay dynamic. Since every SharpSpring account has its own custom fields, this server never assumes field names. Use sharpspring_get_fields to discover a given account's fields (system + custom) at runtime, then reference them by systemName.

Related MCP server: smartlead-mcp-server-sse

Setup

npm install
npm run build

Copy .env.example to .env and fill in your own credentials (generate them in SharpSpring under API Keys):

cp .env.example .env

SHARPSPRING_ACCOUNT_ID=your-account-id
SHARPSPRING_SECRET_KEY=your-secret-key
# Optional: v1 (timezone follows the account's Company Profile) or v1.2 (UTC, default)
SHARPSPRING_API_VERSION=v1.2

Using with an MCP client

Once published to npm, you can run it directly with npx — no local clone needed:

{
  "mcpServers": {
    "sharpspring": {
      "command": "npx",
      "args": ["-y", "sharpspring-mcp-server"],
      "env": {
        "SHARPSPRING_ACCOUNT_ID": "your-account-id",
        "SHARPSPRING_SECRET_KEY": "your-secret-key"
      }
    }
  }
}

Or, running from a local clone/build, point at the built entry point instead:

{
  "mcpServers": {
    "sharpspring": {
      "command": "node",
      "args": ["/absolute/path/to/sharpspring-mcp-server/build/index.js"],
      "env": {
        "SHARPSPRING_ACCOUNT_ID": "your-account-id",
        "SHARPSPRING_SECRET_KEY": "your-secret-key"
      }
    }
  }
}

Never commit real credentials — pass them as environment variables as shown above.

Tools

Only Leads have dedicated, ergonomic tools today. Every other standard SharpSpring object (Accounts, Campaigns, Opportunities, Lists/ListMembers, Notes, Tasks, ...) is already reachable through sharpspring_call and is a natural next PR — see Contributing.

API notes

• Endpoint: https://api.sharpspring.com/pubapi/{version}/, JSON-RPC-style POST requests, auth via accountID/secretKey query params.

• Object-level errors (e.g. "Entry already exists") come back inside a successful response, nested under result.creates[].error / result.updates[].error / result.deletes[].error — always check these, not just the top-level error field.

• Rate limits: 50,000 requests/day, 10 requests/second, 500 objects per query. This server does not implement client-side throttling or retries — callers are responsible for respecting these limits.

Contributing

Pull requests are welcome, especially dedicated tools for other standard objects (Accounts, Campaigns, Opportunities, Lists, Notes, Tasks). Keep additions generic and account-agnostic: no hardcoded field names, account IDs, or other environment-specific values.

License

MIT — see LICENSE.