OpenChainGraph Suite · CONTRACT A3 · arch #5

Arc StableFX Risk Elimination

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-B chain. Quantify Herstatt risk and FX spread savings from Arc StableFX atomic PvP vs non-CLS bilateral settlement.

OpenChainGraph · 2 Steps treasury mandate Hash-Anchored §4 chain_depth:2 Client-Side · Zero PII

Chain Topology — Arc Fit Diagnostic → Arc StableFX RFQ 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 → StableFX dimension primary

MCP Call · run_arc_fit_diagnostic

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

↓

2 TERMINAL · D2 node

Arc StableFX RFQ Economics Model art-44-arc-stablefx-model

herstatt_exposure, annual_benefit_usd, verdict — StableFX economics — final stage

MCP Call · model_arc_stablefx_rfq

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

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: Our book settles dollar-yen bilaterally today. At what StableFX fee in basis points does the atomic alternative stop beating the incumbent?
Run the AINumbers MCP tool `run_chain` with {"chain":"arc-stablefx"} and read `art-44-arc-stablefx-model.verdict`.
Re-run with `inputs` for `art-44-arc-stablefx-model`, reusing the values that result echoed, with `stablefx_fee_bps` set to 30. 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-stablefx.html