Cakemail

MCP server that lets AI assistants discover and call the Cakemail API. Loads the OpenAPI specification dynamically and exposes it through three tools for discovery and execution. Deployed on Vercel.

Architecture

api.cakemail.dev/openapi.json  →  Loaded into memory on first request
                                        ↓
                                  MCP Server (Vercel)
                                  ├── list_endpoints   (browse/search)
                                  ├── get_endpoint     (full details)
                                  └── call_api         (execute)
                                        ↑
                                  AI Assistant (Claude, Cursor, etc.)

• Source: OpenAPI spec fetched from https://api.cakemail.dev/openapi.json
• Spec size: ~470KB, 222 operations, 497 schemas
• Transport: MCP Streamable HTTP protocol

MCP Tools

list_endpoints

Browse available API endpoints with optional filters.

Parameter	Type	Required	Description
tag	string	no	Filter by category (e.g. Campaign, Contact, Account)
search	string	no	Search in path, summary, or operationId

get_endpoint

Get full details for a specific endpoint (parameters, request/response schemas).

Parameter	Type	Required	Description
operationId	string	no	Endpoint operationId (e.g. listCampaigns)
path	string	no	API path (e.g. /campaigns)
method	string	no	HTTP method (e.g. GET, POST)

Provide either operationId or both path + method.

call_api

Read data from the Cakemail API (GET only). Useful for verifying API behavior with real data.

Parameter	Type	Required	Description
path	string	yes	API path (e.g. /campaigns, /contacts/123)
query	object	no	Query parameters as key-value pairs

Authentication

Two methods are supported:

• Basic Auth — use your Cakemail email and password (recommended for MCP clients)
• Bearer token — admin API key or a Cakemail access token from /api/auth

Generate your Basic Auth credentials

echo -n '[email protected]:your-password' | base64

Get a token via /api/auth

curl -X POST https://apidoc.mcp.cakemail.com/api/auth \
  -H "Content-Type: application/json" \
  -d '{"username":"[email protected]","password":"your-password"}'

Connecting to the MCP Server

Claude Code

claude mcp add cakemail-api \
  --transport http \
  https://apidoc.mcp.cakemail.com/api/mcp \
  --header "Authorization: Basic BASE64_ENCODED_CREDENTIALS"

Any MCP client

{
  "mcpServers": {
    "cakemail-api": {
      "type": "streamable-http",
      "url": "https://apidoc.mcp.cakemail.com/api/mcp",
      "headers": {
        "Authorization": "Basic BASE64_ENCODED_CREDENTIALS"
      }
    }
  }
}

API Endpoints

Endpoint	Method	Auth	Description
/api/mcp	POST/GET	Basic or Bearer	MCP Streamable HTTP endpoint
/api/auth	POST	None	Get access token with Cakemail credentials
/api/usage	GET	Admin API key	Tool usage stats. Optional: ?since=2026-03-01&until=2026-03-31

Environment Variables

Variable	Description
API_KEY	Admin API key for service authentication
SUPABASE_URL	Shared Supabase project URL (same as kb.mcp)
SUPABASE_SERVICE_KEY	Supabase service role key

Development

npm install
npm test            # run tests
npm run test:watch  # run tests in watch mode