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Polygon Event Log Decoder
x402
Polygon Event Log Decoder is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Decodes and analyzes Polygon PoS blockchain event logs by parsing raw log data against a supplied ABI to extract structured event arguments and metadata.
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a structured JSON analysis containing the decoded event name, all decoded event arguments (e.g. from, to, value), block number, log index, transaction hash, whether the log was removed, and a network context object describing the Polygon PoS chain details (accepted chain IDs, bridge model, completion policy). Also includes warnings if the supplied ABI and log are not independently authenticated.
Example use cases
Decode ERC-20 Transfer event
“I have a raw event log from a Polygon transaction and the ERC-20 ABI — can you decode it and tell me which addresses were involved in the Transfer and how many tokens moved?”
Analyze DeFi swap event on Polygon
“Can you parse this Uniswap V3 Swap event log from Polygon mainnet using the pool contract's ABI? I need the token amounts in and out and which addresses were swapping.”
Debug smart contract event on Amoy testnet
“I'm testing on Polygon Amoy testnet and got this event log from my contract — here's the ABI. Can you decode it and tell me what event was emitted and what the arguments are?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/polygon_event_log_decode/invokeWhen to prefer
Use this endpoint when you need to decode Polygon PoS event logs (mainnet chain ID 137 or Amoy testnet 80002) and have access to the ABI. It is purpose-built for Polygon's PoS bridge model and completion policy semantics, making it preferable to generic EVM log decoders when Polygon-specific network context matters.
Side effects
- ABI does not match the log topic — decoding fails or returns empty arguments
- Malformed or truncated raw log data causes parse error
- Unsupported chain ID outside Polygon PoS scope (137 or 80002)
- request_json is invalid JSON or exceeds 65536 character limit
- Event signature in log does not match any entry in the supplied ABI
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Supplied ABI and log are not authenticated."
],
"service_id": "polygon_event_log_decode",
"analysis_json": "{\"address\":\"0x0000000000000000000000000000000000000001\",\"args\":{\"from\":\"0x0000000000000000000000000000000000000001\",\"to\":\"0x0000000000000000000000000000000000000002\",\"value\":\"100\"},\"block_number\":1,\"event_name\":\"Transfer\",\"log_index\":0,\"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\"},\"removed\":false,\"transaction_hash\":\"0x1111111111111111111111111111111111111111111111111111111111111111\"}",
"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_event_log_decode",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "8f7df9ad12c0febc0ea1a6d217e8ccff00eb8953c0dc76dcaa0ecfdcdc558e65",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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