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Base EIP-7702 Authorization Inspector
x402
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.
Price / call$0.02
Success—
StatusUnknown
How this service works
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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.
Example use cases
Debug EIP-7702 delegation before broadcast
“I have this EIP-7702 transaction JSON and I want to check the authorization list before I broadcast it — can you inspect the delegated addresses, their chain IDs, and nonces, and flag any duplicates?”
Audit smart account authorization on Base
“We're auditing a user's EIP-7702 transaction that targets Base mainnet — can you parse out the authorization tuples and tell us whether all entries are Base chain and if there are any unexpected addresses?”
Verify EIP-7702 tx structure for Base Sepolia
“Before deploying to testnet, I need to confirm this EIP-7702 transaction's authorization fields are structurally valid for Base Sepolia — can you inspect the JSON and report the chain ID, address, and nonce for each authorization?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/base_eip7702_authorization_inspect/invokeWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"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"
}
}Tags
x402
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