Breaking down: "How does median and p95 Arc settlement measurements work in practice, and which published material supports the explanation?"

Identified 2 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 36 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 2/2 claim(s) above the evidence floor with $0.000000/$0.015000 fetch USDC reserved.

Free-preview pre-check maps an actionable source to every sub-claim (2/2); paid reading may proceed within the budget.

Agent spend wallet ready: 0x29028Fe1122E17Fe7863A22701e863FE4DaE1aFB (balance sufficient)

Reused cached Arc Settlement Benchmarks — Measuring x402 settlement latency on Arc (free) — S1

Reused cached Web Payments Review — How long do x402 payments take to finalize? (free) — S2

Sub-claim "How do median and p95 Arc settlement measurements work in pr…": 50% covered by S1 — S1 reports concrete measured values on Arc testnet (median 178ms, p95 240ms across thousands of submitBatch calls) and ties them to x402 batched settlement finality, giving a partial practical answer. However, it does not explain the measurement methodology itself—how median and p95 are computed, what is being timed (submitBatch call to finality), sampling/window, or how p95 is derived—so the 'how it works in practice' part is only partially covered.

Sub-claim "Which published material supports the explanation of how med…": 40% covered by S1 — S1 is the only supplied material that directly reports Arc median/p95 settlement figures and is the relevant supporting source. But it is an abstract excerpt and does not itself explain the measurement procedure, so it supports the reported numbers rather than a full explanation of how the measurements work. S2 is a conflicting Ethereum-L1-style claim (~15s) and does not support the Arc median/p95 explanation.

Coverage is partial (0.4–0.5) for both sub-claims, but no affordable skipped source plausibly fills the specific gap. The skipped items concern nanopayment floors, Keryx job recovery, USDC finality, x402 as a rail, idempotency, or unrelated topics; none addresses Arc median/p95 measurement methodology. With only $0.015 remaining and no targeted source available, buying more is not justified.

Final check — "How do median and p95 Arc settlement measurements work in pr…": 60% assessed by S1

Final check — "Which published material supports the explanation of how med…": 50% assessed by S1, S2

Final coverage assessment — S1 directly reports median and p95 settlement latency measurements for x402 batched settlements on Arc testnet (median 178ms, p95 240ms), which answers how the measurements work in practice at the level of reported values and context. S2 provides a conflicting general claim about x402 settlement timing but does not address Arc median/p95 measurement methodology. The requested explanation of the measurement method or procedure is not provided by either source; only the resulting median and p95 figures are given. 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.

⚖️ Sources disagreed on x402 settlement latency on Arc — S1 Batched x402 settlements on Arc testnet finalize in roughly 180ms (median 178ms, p95 240ms) via sub-second BFT finality, not block-time-bound. vs S2 x402 payments take about 15 seconds to settle, similar to Ethereum L1 block time, because each payment is its own transaction waiting to be mined. → reported preference: S1 (S1 reports directly measured median and p95 figures from thousands of submitBatch calls on Arc testnet and is internally consistent with Arc's BFT sub-second finality, whereas S2 describes a per-transaction block-mined model without measured median/p95 data.)

Verified — S1 supports claim 1 at 90%: “Across thousands of submitBatch calls on Arc testnet, x402 batched settlements finalize in roughly 180 milliseconds (measured median 178ms, …”

Verified — S1 supports claim 1 at 40%: “Arc's BFT consensus delivers sub-second finality, so a Gateway-batched payment confirms in well under a quarter second — it is not block-tim…”

Below reward gate — S1 supports claim 2 at 10%: “Across thousands of submitBatch calls on Arc testnet, x402 batched settlements finalize in roughly 180 milliseconds (measured median 178ms, …”

Below reward gate — S2 supports claim 2 at 10%: “In our reading, an x402 payment takes about 15 seconds to settle, similar to an Ethereum L1 block time, because each payment is its own tran…”

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

Drafted answer citing 1 source(s)

Confidence: Low — 1 sub-claim remains below the evidence threshold.

Arc Settlement Benchmarks contributed 100% → reward $0.015

Settled $0.015 citation reward → Arc Settlement Benchmarks (5a9ee4a3-8…)

Done. Spent $0.015 across 1 confirmed/simulated payment(s) to creators.