Breaking down: "How long do x402 payments take to finalize?"

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 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 2/4 positive proposal(s): 2 cached + 0 fresh, predicting 2/2 claim(s) above the evidence floor with $0.000000/$0.020000 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 long does it take for an x402 payment to finalize?": 70% covered by S1, S2 — S1 provides a specific median time (178ms) for batched settlements on Arc, while S2 provides an alternative estimate (15 seconds) based on Ethereum L1 block times. Both directly address the question but present conflicting timeframes, leaving some ambiguity about the correct baseline.

Sub-claim "What factors determine the finalization time of an x402 paym…": 60% covered by S1, S2 — S1 identifies factors such as the underlying consensus mechanism (BFT) and batched settlement. S2 identifies the block time of the settlement chain (e.g., Ethereum L1). However, neither provides a comprehensive list of factors, and the influence of other variables like network load or transaction size is not explicitly covered.

The current sources provide direct, albeit conflicting, answers to the primary question about finalization time and identify key factors (consensus mechanism, batched settlement, chain block time). The coverage for the second sub-claim is partial but adequate given the available sources. The remaining budget is insufficient to purchase any of the relevant skipped sources (e.g., 'Agent Economy Weekly' or 'Onchain Micropayments Digest') that might provide more comprehensive factor analysis, and their previews do not clearly promise to fill the specific gap.

Final check — "How long does it take for an x402 payment to finalize?": 80% assessed by S1, S2

Final check — "What factors determine the finalization time of an x402 paym…": 70% assessed by S1, S2

Final coverage assessment — The two sources provide conflicting information about x402 payment finalization time. S1 states it finalizes in roughly 180ms (median) on Arc testnet due to batched settlement and BFT consensus, while S2 states it takes about 15 seconds, similar to Ethereum L1 block time, because each payment is its own transaction. The question asks for finalization time and factors determining it. S1 directly answers the time and implies factors (batching, consensus mechanism). S2 directly answers the time and implies factors (transaction type, block time). Both sources provide partial answers for the first sub-claim but on different contexts. For the second sub-claim, S1 explicitly mentions factors (batching, BFT consensus, not block-time-bound) while S2 implies factors (each payment as separate transaction, block time). Coverage is assessed per sub-claim based on the exact scope requested.

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 The finalization time of an x402 payment. — S1 Batched settlements on Arc testnet finalize in roughly 180 milliseconds. vs S2 An x402 payment takes about 15 seconds to settle, similar to an Ethereum L1 block time. → reported preference: S1 (The sources describe different settlement contexts. S1 is specific to a batched settlement on the Arc testnet, while S2 describes a general case for a payment on Ethereum L1. Both are valid for their respective contexts, but the question does not specify a network. Therefore, the answer presents both figures. For a direct conflict resolution, S1's measurement is more specific (median 178ms, p95 240ms) and provides context for its figure (batched on Arc), making it more precise for its described scenario.)

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 — S2 supports claim 1 at 90%: “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…”

Drafted answer citing 2 source(s)

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

Arc Settlement Benchmarks contributed 60% → reward $0.012

Web Payments Review contributed 40% → reward $0.008

Settled $0.012 citation reward → Arc Settlement Benchmarks (c08310f3-9…)

Settled $0.008 citation reward → Web Payments Review (7f98c7f6-1…)

Done. Spent $0.02 across 2 confirmed/simulated payment(s) to creators.