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Polygon State Sync Event Inspector
x402
Polygon State Sync Event Inspector is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-13).
Analyzes and inspects Polygon PoS state sync events from caller-supplied data, returning structured analysis of state ID, sender, receiver, data hash, and relay completion status.
Price / call$0.015
Success—
StatusUnknown
How this service works
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Output
Returns a structured JSON analysis including the state ID, sender and receiver addresses, data bytes count, data hash, relay completion claim status, registration verification flag, network context (accepted chain IDs, bridge model, completion policy, protocol family), and any warnings about what cannot be proven from the supplied data alone.
Example use cases
Bridge relay verification for DeFi protocol
“I have a Polygon state sync event JSON from our root-to-child bridge transfer and I need to confirm the sender address, receiver address, and data hash, and whether relay completion can be established from this data.”
Debugging failed Polygon bridge message
“Our bridge transaction seems stuck — can you analyze this Polygon state sync event JSON and tell me the state ID, what data was sent, and whether registration or relay completion is verified?”
Audit trail for Polygon PoS cross-chain state
“I need to audit this batch of Polygon state sync events — start with this one: here's the JSON. Pull out the state ID, sender, receiver, data bytes, and note any warnings about what can't be proven from the supplied data.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/polygon_state_sync_event_inspect/invokeWhen to prefer
Use this endpoint when you need to programmatically parse and analyze Polygon PoS state sync event data — particularly for bridge monitoring, DeFi protocol auditing, or debugging cross-chain message relay — and you have the raw event JSON available. It is specifically designed for Polygon root-child state sync events using the checkpoint evidence model, not for Ethereum mainnet events or other L2 bridge protocols.
Side effects
- Invalid or malformed request_json input results in a parse error
- Missing required state sync fields in the JSON may produce incomplete analysis
- Registration and relay completion cannot be verified from caller-supplied data alone — a warning is always returned for this
- Unsupported chain IDs outside Polygon mainnet (137) or Amoy testnet (80002) may not be analyzed correctly
- Payment failure (insufficient USDC balance) prevents the call from executing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Does not prove registered pairing or relay completion."
],
"service_id": "polygon_state_sync_event_inspect",
"analysis_json": "{\"data_bytes\":1,\"data_hash\":\"0x2e3ad575f5877fefc27082d4e7b82e91839c5107c6b82619026d71e2119763dd\",\"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\"},\"receiver\":\"0x0000000000000000000000000000000000000002\",\"registration_verified\":false,\"relay_completion_claimed\":false,\"sender\":\"0x0000000000000000000000000000000000000001\",\"state_id\":\"1\"}",
"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_state_sync_event_inspect",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "15000",
"resultSha256": "36b17d791bde1c3fd05f184317e57094e230dbec65e8bd9d45aeb4a541e4e8ff",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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