# subagentprotocols.com — the agent-to-agent Protocol primitive

> A durable, D1-backed comparison catalog of the 3 real inter-agent protocols this ecosystem uses — A2A, MCP, and e2m — covering purpose, transport, and real usage in this repo, not wire syntax.

## API
- GET /api/protocols — list protocol rows (name, purpose, transport, real usage, status)
- GET /api/protocols/:id — a single protocol row as JSON

## Related
For the narrower a2a.terse.v1 YAML wire-spec syntax specifically, see https://subagentspec.com — deliberately not duplicated here.

## Family
This site is one of the Cloudflare Workers in the subagent*.com family. For the
live, machine-readable directory of every sibling domain, Cloudflare zone ID,
and worker binding, fetch:
https://subagentsubdomains.com/api/dns-zones

For a unified catalog of every API route across every primitive in the family:
https://subagentapi.com/api/catalog