SIP & VoIP utilities.

Small, focused tools for VoIP engineers. They run in your browser or your editor — no signup required. Pick the one that matches what you're trying to do.

• Browser-side

  STIR/SHAKEN

  STIR/SHAKEN Identity decoder

  Paste a SIP Identity header (or share link) to decode the PASSporT, verify the certificate chain, and inspect Rich Call Data — RFC 8224 / 8225 / 8226 / ATIS-1000074 / RFC 9795.

  Open the decoder

• New

  MCP server

  Sipflow MCP — SIP & VoIP knowledge in your editor

  Hook Cursor, VS Code, Claude, or Codex CLI up to a curated VoIP knowledge base (Asterisk, FreeSWITCH, Kamailio, OpenSIPS, Twilio, Cisco, RFCs, STIR/SHAKEN) plus four utilities: search, validate Identity, minimize a trace, detect the stack.

  Install in seconds