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WebMCP Playground

Paste a discovery tag and manifest. See step by step how an agent would find and read your tools. Nothing is executed.

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Code

<!-- 1. Discovery tag (goes in your <head>) -->
<link rel="mcp-manifest" href="/.well-known/mcp.json">

<!-- 2. Manifest (served at /.well-known/mcp.json) -->
{
  "name": "My AI-Ready API",
  "description": "Tools that AI agents can call.",
  "version": "1.0.0",
  "tools": [
    {
      "name": "calculate_sum",
      "description": "Add two numbers and return the total.",
      "endpoint": "/api/sum",
      "inputSchema": {
        "type": "object",
        "properties": {
          "a": { "type": "number", "description": "First number" },
          "b": { "type": "number", "description": "Second number" }
        },
        "required": ["a", "b"]
      }
    }
  ]
}

Agent Log

Static simulation. Nothing on this page is executed.

[System] Playground initialized.

[System] Ready for WebMCP testing.

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About WebMCP Playground

Paste a discovery tag and manifest. See step by step how an agent would find and read your tools. Nothing is executed.

How to use

Edit the discovery tag and manifest in the code box.
Click Run Simulation.
Read the log to see what an agent would find.
Fix any errors and run it again.

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