OpenChainGraph Suite · CONTRACT A3 · arch #5

Arc CPN Payment

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.

W-A chain. Model CPN corridor economics vs SWIFT/ACH/card for cross-border USD flows.

OpenChainGraph · 2 Steps treasury mandate Hash-Anchored §4 chain_depth:2 Client-Side · Zero PII
Chain Topology — Arc Fit Diagnostic → Arc CPN Corridor Economics Model
§4 Execution Hash · Chain Definition Anchor
execution_hash:computing…
Chain Stages · 2 Steps
1 ROOT · D0 node
Arc Fit Diagnostic art-42-arc-fit-diagnostic
arc_score → CPN dimension primary
MCP Call · run_arc_fit_diagnostic
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "run_arc_fit_diagnostic",
    "arguments": {}
  },
  "id": 1
}
https://mcp.ainumbers.co/mcp
↓
2 TERMINAL · D2 node
Arc CPN Corridor Economics Model art-43-arc-cpn-model
npv_3yr, cost_per_payment, migration_verdict — CPN corridor economics — final stage
MCP Call · model_arc_cpn_economics
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "model_arc_cpn_economics",
    "arguments": {}
  },
  "id": 1
}
https://mcp.ainumbers.co/mcp
Export Artifacts
Download the §4 chain definition artifact (hash-anchored composite JSON) or the §13.11 W3C Verifiable Credentials view. Both derive from the chain definition — no new hash is minted. Available after hash computation.

Ask your agent

Copy this paragraph into Claude, OpenClaw, or any MCP-aware agent to run this whole workflow on the server and check one field that answers a real question.

Question: Finance wants the corridor's per-payment cost before we commit. What happens to the migration call once the network's per-transaction fee sits at five hundred dollars?
Run the AINumbers MCP tool `run_chain` with {"chain":"arc-cpn-payment"} and read `art-43-arc-cpn-model.verdict`.
Re-run with `inputs` for `art-43-arc-cpn-model`, reusing the values that result echoed, with `cpn_fee_usd` set to 500. 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/arc-cpn-payment.html