MCP Server Tester
Debug Model Context Protocol (MCP) tools. Generate terminal pipes, paste raw tools/list schemas, inspect dynamic forms, and live-generate JSON-RPC 2.0 commands to execute your form on the real MCP Server.
This interactive workbench simulates how an LLM agent interprets an MCP tool's parameter contract like an HTML form, mapping JSON Schema properties as native HTML form elements, field types, and descriptions as hint text. Read MCP Tools as Forms to learn why its important to iterate and improve on this part of your Agent's interface.
1. Generate Discovery Command
Select a command format or query our live hosted server to discover tools
Our site hosts this live MCP Server at /api/example-mcp. It discards incoming input parameters and responds with mock data, making it a safe smoke-test endpoint for MCP clients in external agents or harnesses.
2. Paste tools/list Output
Paste the JSON response from your terminal or load a sample schema to test
Accepts standard JSON-RPC envelopes, markdown code blocks, bare arrays, or tools objects.
No MCP Tools Loaded
Click "Fetch Live Tools" above or paste a schema in Step 2 to inspect and execute tools.
4. Execution Environment
Select an environment to generate live commands and JSON-RPC payloads
Paste a schema in Step 2 or click "Fetch Live Tools" above to generate tool calls.