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Polygon Bridge Deposit Inspector
x402
Polygon Bridge Deposit Inspector is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).
Analyzes caller-supplied evidence for Polygon PoS bridge deposit events to assess observed completion stage without inferring finality
Price / call$0.02
Success—
StatusUnknown
How this service works
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Output
Returns a structured analysis including: whether amounts are consistent across root and child events, the observed bridge stage reached (e.g. root_event, child_event), a completion_claimed flag, network context (accepted chain IDs, bridge model, completion policy), a list of observed evidence stages, per-record details (amount, token address, ID), and a warning that completion is reported only from observed evidence — never inferred. All output is scoped to caller-supplied data.
Example use cases
Verify bridge deposit amount consistency
“I bridged 100 USDC from Ethereum to Polygon and I have the root event and child event data. Can you inspect the evidence and confirm the amounts match on both sides?”
Diagnose a stuck Polygon bridge transfer
“My Polygon bridge deposit seems stuck — I have the root event but I'm not sure about the child event. Can you analyze the evidence I have and tell me what stage the deposit is at?”
Audit bridge crossing for DeFi settlement logic
“Before I trigger downstream DeFi actions on Polygon, I need to confirm a bridge deposit is genuinely observed on-chain. Here's my root and child event JSON — can you inspect it and tell me the observed stage without inferring finality?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/polygon_bridge_deposit_inspect/invokeWhen to prefer
Choose this endpoint when you need to programmatically inspect caller-supplied Polygon PoS bridge deposit event evidence (root/child events) for amount consistency and stage progression, especially when you must avoid inferring finality without explicit evidence. Prefer this over generic block explorers when you need structured JSON analysis suitable for downstream agent logic, or when operating in an x402 pay-per-call agent pipeline on Base.
Side effects
- Malformed or missing request_json causes validation error
- Unsupported chain ID returns network context mismatch
- Incomplete event data (missing root or child event) results in partial observed_stage only
- Amount inconsistency between root and child events flagged but not auto-resolved
- No finality inference — agent must not treat observed_stage as confirmed settlement
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Completion is reported only as observed evidence, never inferred finality."
],
"service_id": "polygon_bridge_deposit_inspect",
"analysis_json": "{\"amount_consistent\":true,\"amounts\":[{\"amount_atomic\":\"100\",\"stage\":\"root_event\"},{\"amount_atomic\":\"100\",\"stage\":\"child_event\"}],\"completion_claimed\":false,\"network_context\":{\"accepted_chain_ids\":[\"137\",\"80002\"],\"bridge_model\":\"root-child state sync plus checkpoint evidence\",\"completion_policy\":\"never inferred without supplied evidence\",\"protocol_family\":\"Polygon PoS\"},\"observed_evidence\":[\"root_event\",\"child_event\"],\"observed_stage\":\"child_event\",\"records\":{\"child_event\":{\"amount_atomic\":\"100\",\"id\":\"1\",\"token\":\"0x0000000000000000000000000000000000000002\"},\"root_event\":{\"amount_atomic\":\"100\",\"id\":\"1\",\"token\":\"0x0000000000000000000000000000000000000001\"}}}",
"evidence_scope": "caller_supplied_data",
"analyzed_network": "polygon"
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "polygon_bridge_deposit_inspect",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "20000",
"resultSha256": "ee8b1cddc103fec2a47e323772af2089d4bb4a87783b2390c18ce966af0aa1fb",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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