How long do x402 payments take to finalize?
8/24/2026, 6:44:25 PM · llm:mimo:mimo-v2.5
The dispatch, itemised.
Breaking down: "How long do x402 payments take to finalize?"
Identified 3 sub-claim(s) to support
Deep mode: up to 4 paid/cached reads plus one bounded gap-expansion pass when needed.
Discovered 20 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 2/3 claim(s) above the evidence floor with $0.000000/$0.020000 fetch USDC reserved.
Free-preview pre-check covers 2/3 sub-claims (67%). The agent may buy only claim-targeted sources and will label the answer provisional if paid evidence stays thin.
Arc Settlement Benchmarks has excellent reputation (22/100) and citation rate (32%) on this subject. Its cached preview directly measures x402 settlement latency on Arc, perfectly matching the question about finalization time. High value, already cached, so use it. — selected for the claim-aware evidence portfolio (targets claims 1, 3; 0 fetch USDC, 1 attention slot).
Web Payments Review has moderate reputation (16/100) and citation rate (26%) on this subject. Its cached preview is explicitly about 'How long do x402 payments take to finalize?', directly answering the question. Must-use source. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).
Stablecoin Ledger has low historical citation rate (13%) and reputation (3/100) on this subject. Its cached, low cost ($0.003) makes it a marginal candidate for background info on stablecoin units of account, but not directly about x402 finalization time. Caching it as a low-cost backup if needed. — cached bytes are free, but this read does not clear the attention gate (EV 0.30, minimum 0.45, with a required claim target).
Agent Economy Weekly has zero citations on this subject (reputation 0/100) despite being read 10 times. Its preview about x402 as a payment rail is general, not about finalization time. Not worth even the cached cost for this specific question.
Onchain Micropayments Digest has moderate citation rate (25%) but low reputation (13/100) and only 1 citation. Its cached, low cost ($0.005) makes it a potential source for batched settlement timing, but not directly about x402 finalization. Caching as a supplementary source. — cached bytes are free, but this read does not clear the attention gate (EV 0.35, minimum 0.45, with a required claim target).
Distributed Systems Notes has zero citations on this subject (reputation 0/100). Its cached preview about idempotency keys is tangential to payment finalization time. Not relevant enough to spend budget on.
Garden & Soil Monthly is completely off-topic (gardening) and not relevant to x402 payments or settlement time.
Retro Game Hardware is off-topic (console recapping) and not relevant to x402 payments or settlement time.
Stripe Blog has high reputation (13/100) and citation rate (14%) on payments, but this specific cached article is about Visa DCAP optimization, not x402 finalization time. Low cost ($0.002) makes it a cheap background read, but not directly answering the question. — cached bytes are free, but this read does not clear the attention gate (EV 0.30, minimum 0.45, with a required claim target).
Ethereum Foundation Blog has zero citations on this subject (reputation 0/100). Its preview about AI agents vs Ethereum code is not about x402 finalization time. Not relevant.
Cointelegraph.com News has highest reputation (29/100) and citation rate (39%) on this subject. This cached article is about ECB crypto adoption survey, not x402 finalization time, but its general payment focus and high historical value justify caching for potential context. — cached bytes are free, but this read does not clear the attention gate (EV 0.40, minimum 0.45, with a required claim target).
Latent.Space is about AI ontologies and semantic web revival, not about x402 payment finalization time. Off-topic for this specific question.
Simon Willison's Weblog is about AI model pricing and user adoption, not x402 payments or settlement time. Not relevant.
Hugging Face Blog is about AI tutoring and pedagogy, not x402 payments or settlement time. Off-topic.
Vitalik Buterin's website is about low-risk DeFi and Ethereum search, not x402 finalization time. Not directly relevant.
The Coinbase Blog has some relevance to payments (cached, $0.003) and its preview discusses real-time reconciliation, which touches on settlement timing. However, historical data shows no citations on this subject, so caching as a low-probability backup. — cached bytes are free, but this read does not clear the attention gate (EV 0.25, minimum 0.45, with a required claim target).
Decrypt has moderate reputation (21/100) and citation rate (35%) on this subject. This cached article is about Russia's crypto law, not x402 finalization time, but its general crypto payments focus and historical value justify caching. — cached bytes are free, but this read does not clear the attention gate (EV 0.30, minimum 0.45, with a required claim target).
CoinDesk has moderate reputation (14/100) and citation rate (19%) on this subject. This cached article is about stablecoins and settlement cycles, which could provide context on finalization times. Low cost ($0.002) and historical value make it worth caching. — cached bytes are free, but this read does not clear the attention gate (EV 0.35, minimum 0.45, with a required claim target).
Inner Axiom is esoteric/spiritual content, completely off-topic and irrelevant to x402 payments or settlement time.
Conzit Labs has zero citations on this subject (reputation 0/100). Its preview about mobile API optimization is not about x402 finalization time. Not relevant.
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 "Finalization time for x402 payments is defined by a specific…": 100% covered by S1, S2 — Both sources provide specific durations: S1 states roughly 180 milliseconds, S2 states about 15 seconds. The claim is fully covered with concrete numbers.
Sub-claim "The duration is measured in a specific unit of time (e.g., s…": 100% covered by S1, S2 — S1 uses milliseconds, S2 uses seconds. The claim is fully covered.
Sub-claim "The finalization time may vary based on specific conditions …": 80% covered by S1, S2 — S1 implies variation via median/p95 and contrasts with Ethereum L1, suggesting network factors. S2 explicitly mentions dependency on block time and mining, indicating network conditions. However, a dedicated discussion of conditions (e.g., network congestion, batch size) is not detailed. Coverage is adequate but not exhaustive.
All claims have coverage >= 0.8. The gathered sources provide specific durations (180 ms vs 15 sec), units (milliseconds, seconds), and indications of variation based on network factors. No additional sources are needed to meet the core requirements.
Final check — "Finalization time for x402 payments is defined by a specific…": 50% assessed by S1, S2
Final check — "The duration is measured in a specific unit of time (e.g., s…": 60% assessed by S1, S2
Final check — "The finalization time may vary based on specific conditions …": 30% assessed by S1
Final coverage assessment — The sources provide conflicting information about the finalization time for x402 payments (180ms vs. 15 seconds). Neither source directly states that the finalization time is defined by a specific duration with a specific unit, nor do they explicitly discuss variation based on conditions. The coverage is insufficient to confidently answer the question due to conflicting data and lack of explicit support for all sub-claims.
Synthesizing a grounded answer from 2 source(s)…
⚖️ Sources disagreed on Finalization duration for x402 payments — S1 180 milliseconds (batched, on Arc testnet) vs S2 15 seconds (similar to Ethereum L1 block time) → trusted S1 (S1 provides specific, quantitative benchmark data (median and p95 latency) from direct measurement on a specific testnet, making it more precise and likely more reliable for the described implementation than S2's general reading.)
Verified — S1 supports claim 1 at 100%: “Across thousands of submitBatch calls on Arc testnet, x402 batched settlements finalize in roughly 180 milliseconds (measured median 178ms, …”
Verified — S2 supports claim 2 at 100%: “an x402 payment takes about 15 seconds to settle, similar to an Ethereum L1 block time”
Drafted answer citing 2 source(s)
Confidence: Low — 1 sub-claim remain below the evidence threshold, 1 disagreement adjudicated.
Arc Settlement Benchmarks contributed 50% → reward $0.01
Web Payments Review contributed 50% → reward $0.01
Settled $0.01 citation reward → Arc Settlement Benchmarks (01fd0a82-4…)
Settled $0.01 citation reward → Web Payments Review (275d09c3-5…)
Done. Spent $0.02 across 2 confirmed/simulated payment(s) to creators.
Arc Settlement Benchmarks
batched
Web Payments Review
batched
> ⚠ Low confidence — 1 sub-claim remain below the evidence threshold, 1 disagreement adjudicated within budget. Treat this as provisional.
The finalization time for x402 payments varies significantly depending on the implementation: on Arc's testnet, they finalize in roughly 180 milliseconds (median 178ms, p95 240ms) . However, other sources indicate that an x402 payment can take about 15 seconds to settle, similar to an Ethereum L1 block time .
Evidence ledger — quotes verified before rewards
Finalization time for x402 payments is defined by a specific duration
50%“Across thousands of submitBatch calls on Arc testnet, x402 batched settlements finalize in roughly 180 milliseconds (measured median 178ms, p95 240ms).” [S1] Measuring x402 settlement latency on Arc
The duration is measured in a specific unit of time (e.g., seconds, minutes)
60%“an x402 payment takes about 15 seconds to settle, similar to an Ethereum L1 block time” [S2] How long do x402 payments take to finalize?
The finalization time may vary based on specific conditions or network factors
0%No reward-qualifying evidence
Footnotes — each one pays its author
- 1Measuring x402 settlement latency on ArcArc Settlement Benchmarks50%+$0.01
- 2How long do x402 payments take to finalize?Web Payments Review50%+$0.01
Portable research receipt
Take the evidence trail with you
One deterministic JSON bundle binds the answer, visible decisions, exact article versions, claim evidence and a Circle-settlement snapshot under SHA-256. Retain the digest to detect later changes; the self-check is not a publisher or Keryx signature.
Exact receipt still current
2 exact cited article versions still match Keryx's current index.
Carries this dispatch’s question as context — never its answer. The next dispatch is read from sources bought for it.