a2a-gateway

name	a2a-gateway
description	Agent-to-Agent (A2A) protocol gateway reference. JSON-RPC 2.0 peer-to-peer agent communication. (/a2a-gateway, a2a, agent protocol)

A2A Gateway Reference

OpenCrabs exposes an A2A Protocol HTTP gateway for peer-to-peer agent communication.

What it does

Other A2A-compatible agents send tasks via JSON-RPC 2.0. OpenCrabs processes them using its full tool suite and returns results.

Endpoints

• GET /.well-known/agent.json — Agent Card discovery (skills, capabilities)
• POST /a2a/v1 — JSON-RPC 2.0 (message/send, tasks/get, tasks/cancel)
• GET /a2a/health — Health check

Setup

Enable in ~/.opencrabs/config.toml:

[a2a]
enabled = true
bind = "127.0.0.1"
port = 18790

Bee Colony Debate

Multi-agent structured debate with knowledge-enriched context from QMD memory search. Configurable rounds, confidence-weighted consensus based on ReConcile (ACL 2024).

Tool: a2a_send

Param	Required	What
action	Yes	discover, send, get, cancel
url	Yes	Base URL of remote agent (e.g. http://127.0.0.1:18790)
message	For send	Text to send
task_id	For get/cancel	Task ID to check/cancel
context_id	Optional	Continue a conversation
api_key	Optional	Bearer token for authenticated endpoints