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Polygon Bridge Timeline Reconstructor
x402
Polygon Bridge Timeline Reconstructor is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.025/call, status unknown (last checked 2026-09-15).
Analyzes and reconstructs the event timeline of Polygon PoS bridge transactions from caller-supplied event data, identifying missing stages and ambiguous ordering.
Price / call$0.025
Success—
StatusUnknown
How this service works
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Output
Returns a JSON analysis containing an ordered list of bridge events, a list of missing stages (from lock, mint, burn, checkpoint, exit), a flag indicating whether event ordering is ambiguous, a completion_claimed boolean, a count of events processed, and network context including accepted chain IDs, bridge model description, and completion policy. Also returns the evidence scope (always 'caller_supplied_data') and analyzed network ('polygon').
Example use cases
Stuck bridge transfer diagnosis
“My tokens seem stuck crossing from Ethereum to Polygon — I have the raw event logs with block numbers and transaction indices. Can you reconstruct the bridge timeline and tell me which stages are missing so I know where it got stuck?”
Bridge audit for DeFi protocol
“I need to audit a batch of Polygon bridge transactions for our protocol — here are the raw events with chain IDs 137, block numbers, and log indices. Reconstruct the event sequence and flag any that have ambiguous ordering or incomplete stage coverage.”
Verify cross-chain transfer completion
“Can you check whether this Polygon PoS bridge transfer actually completed? I'll give you all the on-chain events I collected — addresses, block numbers, and log indices — and I want to know if the checkpoint and exit stages are present or if completion was never established.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/polygon_bridge_timeline_reconstruct/invokeWhen to prefer
Choose this endpoint when you have raw Polygon PoS bridge event data and need to understand the sequential lifecycle of a bridge transaction — specifically to identify missing stages, detect ordering ambiguity, or audit whether a transfer reached completion. Prefer this over generic blockchain explorers when you need structured stage-by-stage analysis of the lock→mint→burn→checkpoint→exit flow specific to the Polygon PoS bridge model. Note that this endpoint operates purely on caller-supplied data and does not fetch on-chain data itself.
Side effects
- Caller supplies incomplete or malformed event JSON — analysis proceeds but missing_stages list will be extensive
- Timestamps and event authenticity are not verified — the service explicitly warns these are caller-supplied and unvalidated
- Unsupported chain IDs may result in incomplete network context or rejection
- Malformed request_json string (not valid JSON within the string) may cause a parsing error
- Completion is never inferred without explicit supplied evidence — agents should not assume completion even if many stages are present
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Timestamps and event authenticity are caller supplied."
],
"service_id": "polygon_bridge_timeline_reconstruct",
"analysis_json": "{\"ambiguous_order\":false,\"completion_claimed\":false,\"count\":1,\"events\":[{\"_source_index\":0,\"address\":\"0x0000000000000000000000000000000000000001\",\"block_number\":1,\"chain\":\"137\",\"log_index\":0,\"transaction_index\":0}],\"missing_stages\":[\"lock\",\"mint\",\"burn\",\"checkpoint\",\"exit\"],\"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\"}}",
"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_timeline_reconstruct",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "25000",
"resultSha256": "3a834c73e0261dbc6609aeb957e56b0eca593c914efb514f1f2e234609096017",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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