# Polygon Transaction Forensic Report

> Polygon Transaction Forensic Report is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).

Performs a forensic analysis of a Polygon network transaction, cross-checking identity fields, execution details, fees, complexity, and evidence gaps between the transaction and its receipt.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/polygon_transaction_forensic_report/invoke
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polygon-transaction-forensic-report-8d05042e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BTmGMGncT83NPQu3YbA_C

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 polygon-transaction-forensic-report-8d05042e -d '<json body>'
```

Example prompt: Run a forensic report on this Polygon transaction — here's the transaction and receipt JSON — and tell me if the identity fields are consistent, whether it succeeded, what gas was used, and if there are any evidence gaps I should know about.

## When to prefer this

Choose this endpoint when you need a structured, agent-readable forensic breakdown of a Polygon transaction — especially when you need to cross-check consistency between a transaction and its receipt, assess execution complexity, or enumerate evidence gaps for compliance, audit, or investigation purposes. Prefer this over generic block explorers when you need machine-readable output with explicit consistency checks and evidence gap labeling.

## Known failure modes

- Invalid or malformed request_json returns a parsing error
- Unknown or unsupported transaction hash results in empty or error response
- Missing receipt data causes evidence gaps like authenticity_not_verified and finality_not_verified to be reported
- Chain ID mismatch (non-Polygon network) may cause identity check failures
- Truncated or incomplete transaction data leads to partial analysis with additional warnings

## 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 forensic report including: execution status and success flag, gas used and fee breakdown, identity consistency checks across hash/from/to/type/chain_id fields between transaction and receipt, complexity band and score with counts of calls, inner transactions, logs, and instructions, a list of evidence gaps (e.g. authenticity not verified, finality not verified), network context with accepted chain IDs, and a list of forensic warnings about what the report does and does not prove.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Does not prove finality, authenticity, bridge completion, or contract safety."
   ],
   "service_id": "polygon_transaction_forensic_report",
   "analysis_json": "{\"complexity\":{\"band\":\"low\",\"counts\":{\"calls\":0,\"inner\":0,\"instructions\":0,\"keys\":0,\"logs\":1},\"interpretation\":\"structural_complexity_only\",\"network\":\"polygon\",\"score\":2},\"evidence_gaps\":[\"authenticity_not_verified\",\"finality_not_verified\",\"calls_not_supplied\"],\"execution\":{\"contract_address\":null,\"effective_gas_price\":\"105\",\"execution_fee\":\"2205000\",\"gas_used\":\"21000\",\"l1_fee\":\"0\",\"log_count\":1,\"status\":\"0x1\",\"successful\":true,\"total_supplied_fee\":\"2205000\",\"transaction_hash\":\"0x1111111111111111111111111111111111111111111111111111111111111111\",\"warnings\":[\"receipt authenticity and finality are not verified\"]},\"fees\":{\"execution_fee\":\"2205000\",\"l1_fee\":\"0\",\"total_supplied_fee\":\"2205000\"},\"identity\":{\"checks\":[{\"field\":\"hash\",\"match\":true,\"receipt\":\"0x1111111111111111111111111111111111111111111111111111111111111111\",\"transaction\":\"0x1111111111111111111111111111111111111111111111111111111111111111\"},{\"field\":\"transaction_hash\",\"match\":true,\"receipt\":\"0x1111111111111111111111111111111111111111111111111111111111111111\",\"transaction\":\"0x1111111111111111111111111111111111111111111111111111111111111111\"},{\"field\":\"from\",\"match\":true,\"receipt\":\"0x0000000000000000000000000000000000000001\",\"transaction\":\"0x0000000000000000000000000000000000000001\"},{\"field\":\"to\",\"match\":true,\"receipt\":\"0x0000000000000000000000000000000000000002\",\"transaction\":\"0x0000000000000000000000000000000000000002\"},{\"field\":\"type\",\"match\":true,\"receipt\":\"0x2\",\"transaction\":\"0x2\"},{\"field\":\"chain_id\",\"match\":true,\"receipt\":\"137\",\"transaction\":\"137\"}],\"consistent\":true},\"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": [],
  
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polygon-transaction-forensic-report-8d05042e/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)