Agent Commerce Cross-Protocol Conformance

Note (dated 2026-08-04): a chain composes independent computations performed in an analytical order. No step's output is carried into the next step by the execution model; each step computes from its own declared inputs. This is true of every chain on this site, including chains whose per-step copy below reads as a data handoff.

AP2 v0.2 mandate chain > ACP checkout conformance > x402 settlement modelling > unified cross-protocol conformance verdict.

OpenChainGraph · 4 Steps payment mandate Hash-Anchored §4 chain_depth:4 Client-Side · Zero PII

Chain Stages · 4 Steps

1 ROOT · D0 node

AP2 Mandate-Chain Validator art-01-ap2-mandate-chain-validator

ap2_mandate and execution_hash (H1) feed Stage 2 ACP checkout conformance

MCP Call · validate_ap2_mandate_chain

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "validate_ap2_mandate_chain",
    "arguments": {}
  },
  "id": 1
}

↓

2 D2 node

ACP Checkout Conformance Validator art-12-acp-checkout-conformance-validator

acp_verdict and conformance_flags + execution_hash (H2) feed Stage 3 x402 settlement model

MCP Call · validate_acp_checkout

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "validate_acp_checkout",
    "arguments": {}
  },
  "id": 1
}

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3 D3 node

x402 Settlement Cost & Finality Modeler art-03-x402-settlement-modeler

x402_payload and settlement execution_hash (H3) feed Stage 4 cross-protocol validator

MCP Call · model_x402_settlement

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "model_x402_settlement",
    "arguments": {}
  },
  "id": 1
}

↓

4 TERMINAL · D4 node

Agent Commerce Cross-Protocol Conformance Validator art-30-agent-commerce-conformance-validator

Exports unified AP2+ACP+TAP+x402 cross-protocol conformance mandate; execution_hash (H4) covers full transaction, final stage

MCP Call · validate_agent_commerce_conformance

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "validate_agent_commerce_conformance",
    "arguments": {}
  },
  "id": 1
}

Question: An agent checkout needs to settle 25000 dollars in one payment. Which settlement rail does the modeler pick for it? Run the AINumbers MCP tool `run_chain` with {"chain":"agent-commerce-conformance"} and read `art-03-x402-settlement-modeler.recommended_rail`. Re-run with `inputs` for `art-03-x402-settlement-modeler`, reusing the values that result echoed, with `amount_usd` set to 25000. Compare the same field. Verify: call `verify_execution_hash` (https://mcp.ainumbers.co/mcp) with `claimed_hash` set to `composite_execution_hash` and the full `composite_artifact`. Ledger, for a human re-check: https://ledger.ainumbers.co/ PII rule: send synthetic or anonymised inputs only. The MCP server runs these kernels and logs no payloads. Chain page: https://ainumbers.co/chaingraph/chains/agent-commerce-conformance.html

Agent Commerce Cross-Protocol Conformance

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