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SignalHarness EVM Access List Analyzer
x402
SignalHarness EVM Access List Analyzer 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 EVM transaction access lists for security warnings, correctness issues, and potential problems
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a structured JSON object containing: an access_list_analysis field with the detailed analysis text, a warnings array listing any detected issues, an evidence_scope field indicating what data was examined ('caller_supplied_data'), a status field ('succeeded'), and a full receipt object with payment ID, request ID, execution ID, network (eip155:8453/Base), amount paid, and a SHA-256 hash of the result for verification.
Example use cases
Pre-broadcast transaction access list audit
“Before I submit this transaction to the network, can you check this EVM access list for any warnings or correctness issues? Here's the access list: [{"address":"0xdAC17F958D2ee523a2206206994597C13D831ec7","storageKeys":["0x0000000000000000000000000000000000000000000000000000000000000001"]}]”
Smart contract interaction access list review
“I'm calling a DeFi contract and generated this access list — can you analyze it for potential problems or missing entries before I sign the transaction? Access list: [{"address":"0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D","storageKeys":[]}]”
Security audit of submitted access list
“Here's an access list from a transaction I received from a counterparty — can you run it through your EVM access list analyzer and tell me if there are any red flags or suspicious storage slot references? [{"address":"0x6B175474E89094C44Da98b954EedeAC495271d0F","storageKeys":["0x290decd9548b62a8d60345a988386fc84ba6bc95f3ada1f679a46f731b19d5b1"]}]”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/evm_access_list_analyze/invokeWhen to prefer
Choose this endpoint when you need automated, AI-powered security and correctness analysis of EVM transaction access lists (EIP-2930 style) before signing or broadcasting, especially in agent-driven workflows where programmatic payment via x402/USDC on Base is preferred. Ideal when you want structured warnings and evidence-scoped analysis rather than raw RPC simulation data.
Side effects
- Malformed or unparseable access list JSON returns an error status
- Access list string exceeding 65536 characters is rejected
- Empty or null access_list_request field fails validation
- Invalid Ethereum addresses in access list may produce warnings rather than errors
- Network or payment settlement failures return a non-succeeded status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| access_list_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Analysis does not simulate state access or execution."
],
"service_id": "evm_access_list_analyze",
"evidence_scope": "caller_supplied_data",
"access_list_analysis": "{\"duplicate_storage_keys\":0,\"entry_count\":1,\"intrinsic_access_list_gas\":\"6200\",\"storage_key_count\":2,\"unique_addresses\":1,\"unique_storage_keys\":2}"
},
"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_access_list_analyze",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "c7917b8045d9df000f7ad85dc31df317081e3ddb50861812e509178674f4d423",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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