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OpenClaw plugin implementing the A2A (Agent-to-Agent) protocol v0.3.0 — bidirectional agent communication gateway
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# 🦞 OpenClaw A2A Gateway Plugin [](LICENSE) [](https://github.com/google/A2A) []() []() [English](README.md) | [简体中文](README_CN.md) | [繁體中文](README_TW.md) | [日本語](README_JA.md) | [한국어](README_KO.md) | [Français](README_FR.md) | [Español](README_ES.md) | [Deutsch](README_DE.md) | [Italiano](README_IT.md) | [Русский](README_RU.md) | [Português (Brasil)](README_PT-BR.md) A production-ready [OpenClaw](https://github.com/openclaw/openclaw) plugin that implements the [A2A (Agent-to-Agent) v0.3.0 protocol](https://github.com/google/A2A), enabling OpenClaw agents to discover and communicate with each other across servers — with zero-config install and automatic peer discovery. **The only A2A gateway with adaptive, bio-inspired routing, discovery, and resilience — designed for multi-agent ecosystems at scale.** ## Key Features ### Transport & Protocol - **Three transports**: JSON-RPC, REST, and gRPC — with automatic fallback (tries JSON-RPC → REST → gRPC) - **SSE streaming** with heartbeat keep-alive for real-time task status - **Full Part type support**: TextPart, FilePart (URI + base64), DataPart (structured JSON) - **Auto URL extraction**: file URLs in agent text responses are promoted to outbound FileParts ### Intelligent Routing - **Rule-based routing**: auto-select peer by message pattern, tags, or peer skills - **Hill equation affinity scoring**: multi-dimensional routing with sigmoid scoring — skills, tags, pattern, and success rate weighted via `score = affinity^n / (Kd^n + affinity^n)` ([Hill, 1910](https://en.wikipedia.org/wiki/Hill_equation_(biochemistry))) - **Peer skills caching**: Agent Card skills extracted during health checks, enabling skills-based routing - **Per-message agentId targeting**: route to specific OpenClaw agents on the peer (OpenClaw extension) ### Discovery & Resilience - **DNS-SD discovery**: auto-discover peers via `_a2a._tcp` SRV + TXT records - **mDNS self-advertisement**: publish SRV + TXT records so other gateways find you automatically - **Quorum-sensing discovery**: density-aware adaptive polling — short intervals when few peers are known (explore), long intervals when the network is established (stable), with Schmitt-trigger hysteresis to prevent oscillation - **Four-state circuit breaker**: bio-inspired desensitization model (closed → desensitized → open → recovering) with exponential recovery curve - **Adaptive transport selection**: per-transport success rate and latency tracking with composite scoring — transports ranked by recent performance, with static priority tie-breaking - **Push notifications**: webhook delivery with signal-decay importance management and decay-aware retry - **Michaelis-Menten soft concurrency**: progressive delay before the hard queue limit — `delay = baseDelay × load / (Km + load)` provides a soft pressure zone instead of sudden rejection ### Security & Observability - **Bearer token auth** with multi-token zero-downtime rotation - **SSRF protection**: URI hostname allowlist, MIME allowlist, file size limits - **Ed25519 device identity** for OpenClaw ≥2026.3.13 scope compatibility - **JSONL audit trail** for all A2A calls and security events - **Telemetry metrics** endpoint with optional bearer auth - **Durable task store** on disk with TTL cleanup and concurrency limits ## Architecture ``` ┌──────────────────────┐ A2A/JSON-RPC ┌──────────────────────┐ │ OpenClaw Server A │ ◄──────────────────────────► │ OpenClaw Server B │ │ │ (Tailscale / LAN) │ │ │ Agent: AGI │ │ Agent: Coco │ │ A2A Port: 18800 │ │ A2A Port: 18800 │ │
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Would you bet a product on this? Bounded 0–100 and slow moving.
matched fp:41f134797324fdc5, llm:Repository description: 'OpenClaw plugin implementing the A2A (Agent-to-Agent) protocol v0.3.0 — bidirectional agent communication gateway' and topics: openclaw, openclaw-agent, openclaw-extension, openclaw-plugin, openclaw-skills.
matched fp:41f134797324fdc5, llm:Repository description: 'OpenClaw plugin implementing the A2A (Agent-to-Agent) protocol v0.3.0 — bidirectional agent communication gateway' and topics: openclaw, openclaw-agent, openclaw-extension, openclaw-plugin, openclaw-skills.