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SignalHarness EVM Log Inventory
x402
SignalHarness EVM Log Inventory 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).
Analyzes and inventories EVM (Ethereum Virtual Machine) event logs from caller-supplied data, returning a structured log inventory with warnings and evidence scope.
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object containing a log_inventory field with the structured catalog of EVM event logs, a list of warnings encountered during analysis, an evidence_scope field indicating the data came from caller-supplied input, and a full execution receipt with payment ID, request ID, latency, and result hash for auditability.
Example use cases
Audit smart contract event logs
“I have a bunch of raw EVM logs from a DeFi transaction on Base — can you run them through SignalHarness and give me a full inventory of every event that was emitted, along with any warnings?”
Debug failed contract interaction
“My smart contract call produced some logs I don't understand. Can you inventory these EVM logs and flag any warnings so I can figure out what went wrong?”
Classify logs for on-chain monitoring
“I'm building an alert system and need to catalog the event logs from this EVM transaction — can you parse and inventory them so I know exactly what log types are present and what the evidence scope is?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/evm_log_inventory/invokeWhen to prefer
Choose this endpoint when you have raw EVM event log data from an Ethereum-compatible chain and need a structured, cataloged inventory of those logs with warnings — particularly useful for auditing, debugging, or monitoring smart contract interactions on networks like Base. Prefer this over generic log parsers when you need an agent-native, pay-per-call service with a verifiable receipt and result hash.
Side effects
- Input string too short (below 2 characters) or too long (above 65536 characters) returns a validation error
- Malformed or non-EVM log data may produce empty inventory or warnings without useful output
- Payment failure via x402 will block execution and return a 402 response
- Service unavailability returns a failed status in the receipt object
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| evm_log_inventory_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Inventory is limited to caller-supplied log records."
],
"service_id": "evm_log_inventory",
"log_inventory": "{\"by_address\":{\"0x0000000000000000000000000000000000000001\":2},\"by_topic0\":{\"0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\":1,\"0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\":1},\"log_count\":2}",
"evidence_scope": "caller_supplied_data"
},
"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": "evm_log_inventory",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "9de0b25bbeec2e306b89cf36d03ea46e13c5a82b62af6dd8c8e1ffce78b0e629",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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