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

Archived dispatch

Lowconfidence— no citation passed the evidence gate

7/31/2026, 2:18:23 AM · llm:deepseek:deepseek-v4-flash

The dispatch, itemised.

§ IThe decision$0 / $0.03

Decompose

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

Decompose

Identified 4 sub-claim(s) to support

Discover

Discovered 20 verified source(s)

Discover

Recalled 36 past runs on this subject — how these sources performed when they were available.

Discover

ERC-8004 reputation loaded — composite scores on this subject.

DecideCACHE

Agent Economy Weekly$0.004 · EV 80%

Directly covers x402 payment rail; likely discusses authorization details including EIP-712.

DecideCACHE

Web Payments Review$0.002 · EV 30%

Overview of x402 settlement timing, some relevance to payment flow.

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Arc Settlement Benchmarks$0.003 · EV 40%

Directly about x402 settlement, may indirectly relate to authorization but not specifically EIP-712.

DecideSKIP

Stablecoin Ledger$0.003 · EV 30%

Focuses on stablecoins and settlement, not directly on EIP-712 signatures in x402 authorization.

DecideSKIP

Stripe Blog$0.002 · EV 20%

General payment fintech, not specific to x402 or EIP-712.

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Ethereum Foundation Blog$0.002 · EV 10%

General Ethereum news, not focused on x402 or EIP-712.

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Cointelegraph.com News$0.002 · EV 10%

Crypto news, unlikely to detail EIP-712 in x402.

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Decrypt$0.002 · EV 10%

Crypto news, not technical deep dive on x402.

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

Crypto news, not focused on x402 protocols.

DecideSKIP

Onchain Micropayments Digest$0.005 · EV 20%

About nanopayments and batching, not EIP-712 signatures.

DecideSKIP

Distributed Systems Notes$0.003 · EV 10%

Covers consensus and idempotency, not EIP-712 or x402 authorization.

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Simon Willison's Weblog$0.003 · EV 10%

Varied topics; no obvious link to x402 or EIP-712.

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The Coinbase Blog - Medium$0.003 · EV 10%

Company blog, unlikely to cover technical details of x402 authorization.

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Latent.Space$0.004 · EV 10%

AI agents and models, not payment authorization standards.

DecideSKIP

Vitalik Buterin's website$0.004 · EV 10%

Possibly discusses EIP-712 but not specific to x402; low past relevance.

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Garden & Soil Monthly$0.002 · EV 0%

Unrelated gardening content.

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Retro Game Hardware$0.002 · EV 0%

Unrelated retro gaming hardware.

DecideSKIP

Hugging Face - Blog$0.003 · EV 0%

AI/ML blog, unrelated.

DecideSKIP

Inner Axiom — The Codex$0.002 · EV 0%

Esoteric content, irrelevant.

DecideSKIP

Conzit Labs$0.002 · EV 0%

General technology articles, not relevant; not cached.

Fetch

Agent spend wallet ready: 0x29028Fe1122E17Fe7863A22701e863FE4DaE1aFB (balance sufficient)

Fetch

Reused cached Agent Economy Weekly (free) — S1

Fetch

Reused cached Web Payments Review (free) — S2

Fetch

Reused cached Arc Settlement Benchmarks (free) — S3

Re-evaluate

Sub-claim "EIP-712 signatures authorize payment requests in x402": 10% covered — Source S1 mentions signing payment authorization but does not specify EIP-712; no direct evidence.

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Sub-claim "EIP-712 provides typed structured data for payment details": 0% covered — No gathered source discusses typed structured data or EIP-712.

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Sub-claim "EIP-712 ensures integrity and authenticity of payment author…": 0% covered — No gathered source discusses integrity or authenticity properties of EIP-712.

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Sub-claim "EIP-712 enables off-chain signing for x402 payments": 0% covered — No gathered source mentions off-chain signing or EIP-712 in x402 context.

Re-evaluate

Coverage for all sub-claims is very low (0.0-0.1). Skipped sources like Ethereum Foundation Blog and Vitalik Buterin's website are affordable and likely to cover EIP-712 technical details. Purchasing these could fill the gap.

Re-evaluate

Filling gap — buying Ethereum Foundation Blog ($0.002)…

Re-evaluate

Paid $0.002 to Ethereum Foundation Blog (settled cf0eae54-9…) — S4

Re-evaluate

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

Re-evaluate

Paid $0.004 to Vitalik Buterin's website (settled 8e4ec998-1…) — S5

Sufficiency

Final check — "EIP-712 signatures authorize payment requests in x402": 0% assessed

Sufficiency

Final check — "EIP-712 provides typed structured data for payment details": 0% assessed

Sufficiency

Final check — "EIP-712 ensures integrity and authenticity of payment author…": 0% assessed

Sufficiency

Final check — "EIP-712 enables off-chain signing for x402 payments": 0% assessed

Sufficiency

Final coverage assessment — No source mentions EIP-712 in the context of x402. All sub-claims have zero coverage.

Synthesize

Synthesizing a grounded answer from 5 source(s)…

Evidence

No citation passed the evidence gate — the $0.015000 citation pool stays unspent; settled access tolls still stand.

Synthesize

Drafted answer citing 0 source(s)

Verdict

Confidence: Low — no citation passed the evidence gate.

Done

Done. Spent $0.006 across 2 payment(s) to creators.

§ IIIThe settlementweighted · USDC on Arc

Payouts to cited creators appear here.

§ IIThe reading0 cited

Lowconfidence— no citation passed the evidence gate

The provided sources do not contain any information about EIP-712 signatures in the context of x402 payment authorization. No sources discuss EIP-712 or its role in x402.

Evidence ledger — quotes verified before rewards

EIP-712 signatures authorize payment requests in x402
0%
No reward-qualifying evidence
EIP-712 provides typed structured data for payment details
0%
No reward-qualifying evidence
EIP-712 ensures integrity and authenticity of payment authorization
0%
No reward-qualifying evidence
EIP-712 enables off-chain signing for x402 payments
0%
No reward-qualifying evidence