SettlementWitness (OpenClaw Skill)

Use SettlementWitness to produce a deterministic receipt (SAR v0.1) for agent settlement.

Recommended usage (MCP - Preferred)

POST https://defaultverifier.com/mcp
Health check: GET https://defaultverifier.com/mcp-healthz

Tool name: settlement_witness (tools/call)

The MCP endpoint returns the SettlementWitness receipt JSON directly. This is the recommended integration path.

Direct REST alternative

POST https://defaultverifier.com/settlement-witness (preferred, no trailing slash)
POST https://defaultverifier.com/settlement-witness/ (also accepted; redirects)
GET https://defaultverifier.com/settlement-witness (returns JSON help payload)

Verification

Spec: https://defaultverifier.com/spec/sar-v0.1
Public keys: https://defaultverifier.com/.well-known/sar-keys.json

Required input

• task_id (string)
• spec (object)
• output (object)

Example REST request

{ "task_id": "example-002", "spec": { "expected": "foo" }, "output": { "expected": "foo" } }

Interpretation

• PASS -> verified completion
• FAIL -> do not auto-settle
• INDETERMINATE -> retry or escalate
• receipt_id -> deterministic identifier
• reason_code -> canonical failure reason (ex: SPEC_MISMATCH)

Safety notes

• Never send secrets in spec/output.
• Keep spec/output deterministic.