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Webhook Tester — Send & Measure HTTP Endpoints

https://webhook-tester--axel-belfort.run.tools
● healthy

conformance: fail

Transport
Auth
Cost

How to connect

MCP endpoint (streamable-http)
https://webhook-tester--axel-belfort.run.tools
JSON-RPC initialize probe
curl -X POST https://webhook-tester--axel-belfort.run.tools \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'
Homepage
https://webhook-tester--axel-belfort.run.tools
Listed at (chiark)
https://chiark.ai/agents/52b8c5e9-ca92-4a9a-9650-ea18e13d3518