What is the role of EIP-712 signatures in x402 payment authorization?
8/23/2026, 10:01:41 AM · llm:deepseek:deepseek-v4-flash + llm:mimo:mimo-v2.5 on 1 step
The dispatch, itemised.
Breaking down: "What is the role of EIP-712 signatures in x402 payment authorization?"
Identified 4 sub-claim(s) to support
Discovered 20 verified source(s)
Recalled 60 past runs on this subject — how these sources performed when they were available.
ERC-8004 reputation loaded — composite scores on this subject.
Ethereum Foundation Blog never cited on this subject, but article title 'Clear Signing: Making Transaction Approvals Safer on Ethereum' is highly relevant to EIP-712 signatures and secure transaction authorization. Strong topical match despite low reputation. Already cached, so free.
Web Payments Review has moderate past performance (21% citation) and article is specifically about x402 payment finalization timing, relevant to authorization flow. Already cached, so free.
Arc Settlement Benchmarks has good past performance (42% citation) and is about x402 settlement on Arc. Article title mentions measuring latency, which is tangentially related to authorization flow. Already cached, so free.
Agent Economy Weekly has low past performance (8% citation) but article title directly mentions x402 as payment rail, highly relevant to question. Already cached, so reuse free. Despite low reputation, strong topical match.
Stripe Blog has 9% citation but high avg weight 1.0 when cited. Article is about AI spending data, not EIP-712 signatures or x402 authorization. Low topical fit. Already cached, but low value for this question. — cached bytes are free, but this read does not clear the attention gate (EV 0.30, minimum 0.45, with a required claim target).
Cointelegraph.com News has highest past performance (44% citation) but article is about physical crypto theft, not EIP-712 signatures or x402 authorization. Low topical fit despite good reputation.
Stablecoin Ledger has low past performance (20% citation, avg weight 0.38). Article is about USDC settlement mechanics, not EIP-712 or x402 authorization. Low topical fit. Already cached, so no cost, but low value. — cached bytes are free, but this read does not clear the attention gate (EV 0.20, minimum 0.45, with a required claim target).
Vitalik Buterin's website article is about low-risk DeFi, not EIP-712 signatures or x402 payment authorization. Low topical fit.
CoinDesk article is about a wallet data breach, not EIP-712 signatures or x402 payment authorization. Low topical fit despite moderate past performance.
Distributed Systems Notes never cited on this subject. Article is about idempotency keys, not EIP-712 signatures. Generic systems concept, low relevance to specific x402 authorization.
Simon Willison's Weblog article is about LLM tooling, not EIP-712 signatures or x402 payment authorization. Low topical fit.
Hugging Face blog article is about voice AI evaluation, not EIP-712 signatures or x402 payment authorization. Low topical fit.
Coinbase Blog article is about a bridge incident from 2022, not current EIP-712 signatures or x402 authorization. Low topical fit.
Latent.Space article is about AI agents and ontologies, not EIP-712 signatures or x402 payment authorization. Low topical fit.
Onchain Micropayments Digest has moderate past performance (33% citation) but article is about nanopayment batching, not EIP-712 signatures or x402 authorization specifics. Low topical fit for this question.
Gardening article completely irrelevant to crypto, EIP-712, or x402. Skip.
Retro gaming hardware article completely irrelevant to crypto, EIP-712, or x402. Skip.
Esoteric mythology article completely irrelevant to crypto, EIP-712, or x402. Skip.
MLB trade deadline article completely irrelevant to crypto, EIP-712, or x402. Skip.
Agent spend wallet ready: 0x29028Fe1122E17Fe7863A22701e863FE4DaE1aFB (balance sufficient)
Reused cached Ethereum Foundation Blog — Clear Signing: Making Transaction Approvals Safer on Ethereum (free) — S1
Reused cached Web Payments Review — How long do x402 payments take to finalize? (free) — S2
Reused cached Arc Settlement Benchmarks — Measuring x402 settlement latency on Arc (free) — S3
Reused cached Agent Economy Weekly — x402 turns HTTP 402 into an agent payment rail (free) — S4
Attention budget is full at 4 source(s); no broader context will be purchased.
Final check — "EIP-712 defines a standardized format for signing typed data…": 0% assessed
Final check — "In x402, EIP-712 signatures authorize a specific payment by …": 0% assessed
Final check — "The structured data in the signature includes chain-specific…": 0% assessed
Final check — "The x402 smart contract verifies the EIP-712 signature on-ch…": 0% assessed
Final coverage assessment — None of the gathered sources mention EIP-712, typed data, or signature details. They cover x402 payment finalization timing and general HTTP 402 usage, but do not address the specific role of EIP-712 signatures in x402 payment authorization.
Synthesizing a grounded answer from 4 source(s)…
No citation passed the evidence gate — the $0.015000 citation pool stays unspent; settled access tolls still stand.
Drafted answer citing 0 source(s)
Confidence: Low — no citation passed the evidence gate.
Done. Spent $0 across 0 confirmed/simulated payment(s) to creators.
Payouts to cited creators appear here.
The provided sources do not describe EIP-712 signatures or their role in x402 payment authorization. The closest relevant statement is that in x402 "the client signs a payment authorization and retries," but none of the sources explain EIP-712, structured typed-data signing, or how such signatures are verified on-chain. Therefore, none of the four subclaims can be confirmed from these sources.
Evidence ledger — quotes verified before rewards
EIP-712 defines a standardized format for signing typed data, making payment authorization human-readable and resistant to phishing attacks.
0%No reward-qualifying evidence
In x402, EIP-712 signatures authorize a specific payment by committing to the transaction details such as recipient, amount, nonce, and deadline.
0%No reward-qualifying evidence
The structured data in the signature includes chain-specific parameters like chainId and verifier contract address, preventing cross-chain replay attacks.
0%No reward-qualifying evidence
The x402 smart contract verifies the EIP-712 signature on-chain to authenticate the payer's explicit consent before executing the payment.
0%No reward-qualifying evidence
Carries this dispatch’s question as context — never its answer. The next dispatch is read from sources bought for it.