What is the role of EIP-712 signatures in x402 payment authorization?

Archived dispatch

Moderateconfidence— 1 source cited

7/24/2026, 3:09:12 AM · llm:deepseek:deepseek-chat

The dispatch, itemised.

§ IThe decision$0.015 / $0.03

50%$0.015 under cap

Decompose

Breaking down: "What is the role of EIP-712 signatures in x402 payment authorization?"

Decompose

Identified 3 sub-claim(s) to support

Discover

Discovered 20 verified source(s)

Discover

Loaded query memory: 20 known sources from past runs.

Discover

ERC-8004 reputation loaded — composite scores from past queries.

DecideCACHE

Ethereum Foundation Blog$0.002 · EV 60%

Low hit rate (8%) but decent reputation (2/100) and avg reward. Cached, covers Ethereum signing standards (Clear Signing). Could provide context on EIP-712's role in safe authorization.

DecideCACHE

Web Payments Review$0.002 · EV 50%

Moderate hit rate (52%) and reputation (8/100). Cached, covers x402 payment finality. Relevant to EIP-712's role in authorization timing.

DecideCACHE

Stablecoin Ledger$0.003 · EV 70%

High hit rate (74%) and reputation (15/100). Cached, relevant to stablecoins but not directly about EIP-712 signatures. Good supporting context for payment authorization.

DecideCACHE

Arc Settlement Benchmarks$0.003 · EV 70%

High hit rate (66%) and reputation (13/100). Cached, directly covers x402 settlement. Relevant to EIP-712's role in off-chain authorization reducing on-chain costs.

DecideCACHE

Agent Economy Weekly$0.004 · EV 80%

High hit rate (68%) and reputation (17/100). Cached, directly covers x402 and agent payments. Strong relevance to EIP-712 role in authorization.

DecideCACHE

Onchain Micropayments Digest$0.005 · EV 90%

Highest hit rate (86%) and reputation (31/100). Cached, covers nanopayments and gas efficiency. Highly relevant to EIP-712's off-chain authorization reducing costs.

DecideSKIP

Distributed Systems Notes$0.003 · EV 30%

Low hit rate (30%) and reputation (3/100). Cached but generic; idempotency keys are tangential to EIP-712 signatures. Not worth budget.

DecideSKIP

Stripe Blog$0.002 · EV 20%

No historical data. Cached, covers agent payments but preview lacks EIP-712 specifics. Low expected value for this question.

DecideSKIP

Vitalik Buterin's website$0.004 · EV 40%

No historical data. Cached, but preview shows no EIP-712 or x402 content. Authoritative but not directly relevant.

DecideSKIP

The Coinbase Blog - Medium$0.003 · EV 30%

No historical data. Cached, covers stablecoins but preview lacks EIP-712 specifics. Low expected value.

DecideSKIP

Latent.Space$0.004 · EV 30%

Low hit rate (10%) and reputation (2/100). Cached, covers AI agents but preview lacks EIP-712 specifics. Not worth budget.

DecideSKIP

Simon Willison's Weblog$0.003 · EV 20%

No historical data. Cached, but preview shows no EIP-712 or x402 content. Low relevance.

DecideSKIP

Hugging Face - Blog$0.003 · EV 20%

Low hit rate (6%) and reputation (2/100). Cached, but preview shows ML focus, not EIP-712. Not worth budget.

DecideSKIP

Cointelegraph.com News$0.002 · EV 10%

No historical data. Cached, but news site with low relevance to EIP-712 technical details. Not worth budget.

DecideSKIP

Decrypt$0.002 · EV 10%

No historical data. Cached, news site with low relevance to EIP-712 technical details. Not worth budget.

DecideSKIP

CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data$0.002 · EV 10%

No historical data. Cached, news site with low relevance to EIP-712 technical details. Not worth budget.

DecideSKIP

Garden & Soil Monthly$0.002 · EV 0%

Irrelevant topic (gardening). No value for EIP-712 question.

DecideSKIP

Retro Game Hardware$0.002 · EV 0%

Irrelevant topic (retro gaming). No value for EIP-712 question.

DecideSKIP

Inner Axiom — The Codex$0.002 · EV 0%

Irrelevant topic (esoteric). No value for EIP-712 question.

DecideSKIP

Conzit Labs$0.002 · EV 0%

Irrelevant topic (lifestyle/tech reviews). No value for EIP-712 question.

Fetch

Agent spend wallet ready: 0x29028Fe1122E17Fe7863A22701e863FE4DaE1aFB (balance sufficient)

Fetch

Reused cached Ethereum Foundation Blog (free) — S1

Fetch

Reused cached Web Payments Review (free) — S2

Fetch

Reused cached Stablecoin Ledger (free) — S3

Fetch

Reused cached Arc Settlement Benchmarks (free) — S4

Fetch

Reused cached Agent Economy Weekly (free) — S5

Fetch

Reused cached Onchain Micropayments Digest (free) — S6

Re-evaluate

Sub-claim "EIP-712 signatures provide a standardized, typed data signin…": 0% covered — No gathered source mentions EIP-712 or typed data signing in the context of x402.

Re-evaluate

Sub-claim "EIP-712 signatures enable off-chain authorization of x402 pa…": 20% covered by S6 — S6 discusses off-chain authorizations and batching to reduce costs, but does not specifically mention EIP-712.

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Sub-claim "EIP-712 signatures ensure that the payment authorization is …": 0% covered — No gathered source addresses verifiability or tamper-proofing via EIP-712.

Re-evaluate

Coverage for all sub-claims is very low (0.0-0.2). Vitalik Buterin's website (price 0.004) is likely to discuss EIP-712 in depth, fitting within the remaining budget of 0.015. Other sources like Stripe Blog or Coinbase Blog may also be relevant but are less authoritative on Ethereum standards.

Re-evaluate

Filling gap — buying Vitalik Buterin's website ($0.004)…

Re-evaluate

Paid $0.004 to Vitalik Buterin's website (settled 268ebeb5-5…) — S7

Synthesize

Synthesizing a grounded answer from 7 source(s)…

Synthesize

Drafted answer citing 1 source(s)

Verdict

Confidence: Moderate — 1 source cited.

Attribute

Onchain Micropayments Digest contributed 100% → reward $0.015

Settle

Settled $0.009 citation reward → Mara Okoye (b449dc41-8…)

Settle

Settled $0.006 citation reward → Devin Park (8da8efe1-e…)

Done

Done. Spent $0.019 across 3 payment(s) to creators.

§ IIIThe settlementweighted · USDC on Arc

100%

Onchain Micropayments Digest

batched

100%+$0.009

Onchain Micropayments Digest

batched

100%+$0.006

Settled · USDC on Arc ↗$0.015

§ IIThe reading1 cited

Moderateconfidence— 1 source cited

EIP-712 signatures are not mentioned in the provided sources in relation to x402 payment authorization. The sources describe x402 as using off-chain signed authorizations that are settled in batches to reduce costs , but they do not specify the signing standard (e.g., EIP-712). Therefore, the role of EIP-712 signatures in x402 cannot be confirmed from the given information.

Footnotes — each one pays its author