Echo catalog
A minimal healthy catalog with one descriptive, read-only tool definition.
Fixture endpoint publishing is separate
Approved fixture catalogue
Test an MCP server with safe fixture scenarios
Use these scenarios to validate how a browser-direct MCP tester reports success, failure, authentication, pagination, and timeout behavior.
Authentication challenge
A controlled response that lets the tester distinguish authentication from browser blocking.
Fixture endpoint publishing is separate
Paginated catalog
Multiple tools/list pages for checking bounded cursor handling and truncation findings.
Fixture endpoint publishing is separate
Slow response
A delayed response scenario for checking cancellation, timeout, and incomplete verdicts.
Fixture endpoint publishing is separate
Protocol error
Malformed or JSON-RPC error responses for verifying safe error classification.
Fixture endpoint publishing is separate
Complex catalog
A larger catalog with schema variety for checking catalog quality and bounded rendering.
Fixture endpoint publishing is separate
Fixture boundary
This page does not fetch or host a mock server
The approved scenarios are listed here while their HTTPS fixture endpoints are published in a separate milestone. The tester itself remains browser-direct and never uses a server-side proxy.
Open the MCP tester