Try any endpoint against the live store with your own key. Requests go straight from your browser to https://mareco.com/api/v1; the key stays in this browser and is never sent anywhere else. Calls that create things (quotes, approvals, renders) are real.
Request
Pick an endpoint.
Response
The MCP server at https://mareco.com/mcp speaks JSON-RPC. Load the tool list with your key, pick a tool and edit its arguments.
JSON-RPC request
Response