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rtcf

https://rtcf.happlen.com/api/mcp

answers a handshake

Registry name: io.github.hengkp/rtcf
Reports itself as: rtcf 1.0.0
Protocol version: 2025-06-18
Transport: streamable-http
HTTP status: 200
Latency: 330 ms
Tools: 3
Checked: 2026-09-06T08:23:40Z

Tools it reports

improve_prompt
improve_followup
build_prompt

Check it yourself

curl -s -X POST https://rtcf.happlen.com/api/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"you","version":"0"}}}'