# Base EIP-7702 Authorization Inspector

> Base EIP-7702 Authorization Inspector is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Parses and inspects EIP-7702 authorization tuples from a raw transaction JSON, returning structural analysis of the authorization list without recovering signers or verifying signatures.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/base_eip7702_authorization_inspect/invoke
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-eip-7702-authorization-inspector-486ca614
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KyCpYfBH43BpMp5Z7CIR9

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 base-eip-7702-authorization-inspector-486ca614 -d '<json body>'
```

Example prompt: Can you inspect this EIP-7702 transaction JSON and tell me what authorizations are in it — like what addresses are being delegated to, the chain IDs, nonces, and whether there are any duplicate tuples? Here's the raw transaction JSON: {paste transaction JSON}.

## When to prefer this

Choose this endpoint when you need to structurally decode and inspect EIP-7702 authorization tuples from a raw transaction JSON, specifically in the context of Base mainnet or Base Sepolia (OP Stack). It is ideal for pre-broadcast audits, debugging delegation targets, and detecting duplicate authorizations — but not for cryptographic signature verification or signer recovery, which this endpoint explicitly does not perform.

## Known failure modes

- Malformed or non-EIP-7702 JSON input returns an error or empty analysis
- Input exceeds 65536 character limit
- Authorization list is missing or empty in the provided transaction JSON
- Non-Base chain IDs cause the all_base flag to be false but do not error
- Payment failure (insufficient USDC) returns 402 before execution

## 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 JSON analysis of the EIP-7702 authorization list including: each authorization's address, chain ID, index, nonce, and whether signature fields are present; a flag indicating if all authorizations target Base; a list of duplicate (address, chain_id, nonce) tuples; network context including accepted chain IDs, deposit transaction type, fee model, and protocol family (OP Stack). Accompanied by a warnings field noting that signatures are not verified and signers are not recovered.

## 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 recover signers, verify signatures, or prove activation."
   ],
   "service_id": "base_eip7702_authorization_inspect",
   "analysis_json": "{\"all_base\":true,\"authorizations\":[{\"address\":\"0x0000000000000000000000000000000000000001\",\"chain_id\":\"8453\",\"index\":0,\"nonce\":\"1\",\"signature_fields_present\":true}],\"duplicate_tuples\":[],\"network_context\":{\"accepted_chain_ids\":[\"8453\",\"84532\"],\"deposit_transaction_type\":\"0x7e\",\"fee_model\":\"L2 execution plus caller-supplied L1 data/operator components\",\"protocol_family\":\"OP Stack\"}}",
   "evidence_scope": "caller_supplied_data",
   "analyzed_network": "base"
  },
  "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": "base_eip7702_authorization_inspect",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "20000",
   "resultSha256": "e6f7ec72d8188bb0652884a9a0751272fe1c402a0727e716ec36ec6e79466649",
   "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/base-eip-7702-authorization-inspector-486ca614/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)