ckg-agent-protocols 0.1.0

Agent protocol stack as traversable knowledge graphs — A2A v1.0, x402, MCP 2026-07-28, ERC-8004, Google ADK, SDK ecosystem. 460 nodes, 8 domains, SHA-256 provenance. MCP-native.

ckg-agent-protocols

Agent protocol stack as traversable knowledge graphs — 8 domains, 460 nodes, SHA-256 source provenance.

Domain	Nodes	Coverage
a2a-protocol	73	A2A Protocol v1.0 — transport, Agent Card, task lifecycle, 10 RPC methods
x402-protocol	55	x402 Payment Protocol — HTTP 402, PAYMENT-REQUIRED, settlement schemes
a2a-x402-integration	58	A2A × x402 — Standalone/Embedded flows, signing patterns, 7 error codes
a2a-sdk-ecosystem	52	a2a-sdk · @a2a-js/sdk · Inspector · TCK · migration guides
google-adk-a2a	48	RemoteA2aAgent · to_a2a() · ADK 2.0 graph workflows (Experimental)
mcp-protocol	56	MCP 2026-07-28 — Streamable HTTP only, OAuth 2.1, Python/TS SDK v2
erc8004-agent-trust	46	ERC-8004 — on-chain identity (ERC-721), reputation, validation registries
a2a-master	72	A2A Communication Master — full 7-step flow, cross-protocol constraint matrix

Install

pip install ckg-agent-protocols

MCP server

uvx ckg-agent-protocols

Claude Desktop config:

{
  "mcpServers": {
    "agent-protocols": {
      "command": "uvx",
      "args": ["ckg-agent-protocols"]
    }
  }
}

HTTP server (x402 + A2A Agent Card)

pip install "ckg-agent-protocols[serve]"
python -m ckg_agent_protocols.serve

• /.well-known/agent-card.json — A2A v1.0 Agent Card
• /.well-known/mcp/pricing.json — pricing tiers
• /mcp — MCP Streamable HTTP endpoint
• Free: 10 calls/hr · x402: $0.010/call USDC Base L2 · Dev: $29/mo

Tools

• list_domains() — list all 8 domains
• search_concepts(domain, query) — find concepts by keyword
• query_ckg(domain, concept, depth) — traverse the graph from a concept
• get_prerequisites(domain, concept) — full upstream prerequisite chain
• verify_source(domain, concept) — return source URL + SHA-256 hash

Provenance

Every node carries source_url and source_hash (SHA-256 of source bytes at extraction time).

curl -s <source_url> | sha256sum  # compare to source_hash

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By Graphify.md · patent-pending methodology · benchmark paper