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

Identified 1 research target(s) to investigate; these are not established facts

Deep mode: up to 4 paid/cached reads plus one bounded gap-expansion pass when needed.

Discovered 21 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.

Claim-aware portfolio selected 2/2 positive proposal(s): 2 cached + 0 fresh, predicting 1/1 claim(s) above the evidence floor with $0.000000/$0.025000 fetch USDC reserved.

Free-preview pre-check maps an actionable source to every sub-claim (1/1); paid reading may proceed within the budget.

Agent spend wallet ready: 0x72449d71ea6a955aD4d4d22C2fDAcdFCA622b9BE (balance sufficient)

Reused cached Agent Economy Weekly — x402 turns HTTP 402 into an agent payment rail (free) — S1

Reused cached Arc Settlement Benchmarks — Measuring x402 settlement latency on Arc (free) — S2

Sub-claim "What is the role of EIP-712 signatures in x402 payment autho…": 10% covered by S1 — S1 states that in x402 the client 'signs a payment authorization and retries,' which is topical context about signing in x402 payment authorization. However, it never mentions EIP-712, typed structured data, EIP-712 domains, or the specific role EIP-712 plays in the authorization flow. S2 covers settlement latency and is irrelevant to EIP-712 signatures. The requested EIP-712-specific role is therefore not answered.

Coverage is below 0.5 and the specific EIP-712 role is missing. None of the affordable skipped sources (all priced at 0.002–0.005, within the 0.025 remaining budget) explicitly address EIP-712 signatures in x402 payment authorization. The closest candidates are 'Web Payments Review — How long do x402 payments take to finalize?' (settlement timing, not signatures) and 'Keryx Engineering — Recovering a Keryx paid research job' (mentions avoiding signing a second payment, but is about job recovery, not EIP-712). Because no skipped source's preview indicates it would fill the EIP-712 gap, no purchase is recommended despite the low coverage.

Final check — "What is the role of EIP-712 signatures in x402 payment autho…": 10% assessed by S1

Final coverage assessment — The gathered sources describe x402 as reviving HTTP 402 and requiring a client to sign a payment authorization, but neither passage mentions EIP-712 or explains the role of EIP-712 signatures in x402 payment authorization. S1 provides only topical context about x402 payment authorization generally; S2 is about settlement latency and is unrelated to EIP-712 signatures. The specific requested role of EIP-712 signatures remains unanswered. The assessment does not establish a complete supported answer for every requested part.

Synthesizing a grounded answer from 2 source(s)…

Relevance review returned; only checked excerpts can retain support, and review cannot raise it.

Below reward gate — S1 supports claim 1 at 20%: “A server responds 402 with machine-readable payment requirements; the client signs a payment authorization and retries.”

Rejected 0 invalid evidence span(s) and 1 unsupported citation marker(s); rejected markers cannot receive citation rewards.

No citation passed the evidence gate — the $0.025000 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.