# SignalHarness EVM Access List Analyzer

> 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

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/evm_access_list_analyze/invoke
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-evm-access-list-analyzer-5ec6252c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XNqvfxUyIoiFMWorTl31M

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability signalharness-evm-access-list-analyzer-5ec6252c -d '<json body>'
```

Example prompt: Can you analyze this EVM transaction access list and flag any warnings or issues with it: [{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","storageKeys":["0x0000000000000000000000000000000000000000000000000000000000000006"]}]?

## When to prefer this

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.

## Known failure modes

- 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

## How this service works

Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "access_list_request": {
   "type": "string",
   "maxLength": 65536,
   "minLength": 2
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "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"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signalharness-evm-access-list-analyzer-5ec6252c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from signalharness.ai](https://www.zero.xyz/host/signalharness.ai/llms.txt)