How long do x402 payments take to finalize?
8/29/2026, 4:19:55 PM · llm:mimo:mimo-v2.5
The dispatch, itemised.
Breaking down: "How long do x402 payments take to finalize?"
Identified 2 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 3/3 positive proposal(s): 3 cached + 0 fresh, predicting 1/2 claim(s) above the evidence floor with $0.000000/$0.020000 fetch USDC reserved.
Free-preview pre-check covers 1/2 sub-claims (50%). The agent may buy only claim-targeted sources and will label the answer provisional if paid evidence stays thin.
Web Payments Review is cached, and its preview matches the question exactly: 'How long do x402 payments take to finalize?' It has a 35% citation rate on this subject. Reuse for free to get targeted overview. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).
Stablecoin Ledger is cached and covers 'USDC settles instantly onchain,' providing relevant context on finality times for stablecoins, which x402 often uses. It has a 25% citation rate and reputation 17/100. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).
Agent Economy Weekly is cached and explains 'x402 turns HTTP 402 into an agent payment rail,' which could describe the payment mechanism but may not directly address finalization timing. Low citation rate (11%), but cached and tangentially relevant. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).
Arc Settlement Benchmarks is a top-performing source for this subject (50% citation rate, reputation 36/100). Its preview directly addresses 'Measuring x402 settlement latency on Arc,' which is highly specific to the question about finalization time. Worth the 0.003 toll. — the free-preview coverage check could not connect this source to any sub-claim, so no toll is authorized.
Cointelegraph.com News is cached and has a high reputation (35/100), but its preview on ECB crypto payments is not directly about x402 finalization. May provide broader payment context but is not a top match. — cached bytes are free, but this read does not clear the attention gate (EV 0.40, minimum 0.45, with a required claim target).
Stripe Blog is cached and has a high reputation (34/100), but its preview is about solo founding traits, not x402 payments. Very low topical relevance for finalization time. — cached bytes are free, but this read does not clear the attention gate (EV 0.30, minimum 0.45, with a required claim target).
Decrypt is cached and has a good reputation (35/100), but its preview covers Russia's crypto law, not x402 settlement times. Minimal direct value. — 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 is cached and has a decent reputation (16/100), but its preview discusses capital traps and settlement cycles in general, not specific x402 finalization times. — cached bytes are free, but this read does not clear the attention gate (EV 0.30, minimum 0.45, with a required claim target).
Onchain Micropayments Digest is cached but has a low reputation (9/100). Its preview on nanopayments and batching is tangential but may touch on settlement efficiency. Low priority. — cached bytes are free, but this read does not clear the attention gate (EV 0.30, minimum 0.45, with a required claim target).
Distributed Systems Notes is cached but has never been cited on this subject. Its preview on idempotency keys is a generic systems concept, not x402-specific. Unlikely to help. — cached bytes are free, but this read does not clear the attention gate (EV 0.20, minimum 0.45, with a required claim target).
The Coinbase Blog - Medium is cached but has never been cited on this subject. Its preview on real-time reconciliation is about Coinbase internals, not x402 payment finalization. — cached bytes are free, but this read does not clear the attention gate (EV 0.20, minimum 0.45, with a required claim target).
Retro Game Hardware is completely off-topic (console recapping). No value for x402 payments question.
Garden & Soil Monthly is completely off-topic (gardening). No value for x402 payments question.
Conzit Labs is about computer vision, not payments. No topical relevance.
Inner Axiom is esoteric mysticism, not payments. No value.
Simon Willison's Weblog is not cached and its preview on AI model usage is unrelated to x402 finalization. Low topical match, not worth the 0.003 cost.
Hugging Face Blog is about AI tutoring, not payments. Not cached and off-topic.
Vitalik Buterin's website is about low-risk DeFi, not x402 payment finalization. Not cached and indirect at best.
Latent Space is about AI ontologies, not payments. Not cached and off-topic, though it mentions AI agents.
Agent spend wallet ready: 0x29028Fe1122E17Fe7863A22701e863FE4DaE1aFB (balance sufficient)
Reused cached Web Payments Review — How long do x402 payments take to finalize? (free) — S1
Reused cached Stablecoin Ledger — Why USDC settles instantly onchain (free) — S2
Reused cached Agent Economy Weekly — x402 turns HTTP 402 into an agent payment rail (free) — S3
Sub-claim "x402 payments finalize within a specific time duration": 70% covered by S1 — Source S1 explicitly states that an x402 payment takes about 15 seconds to settle, providing a specific time duration. The other sources do not address the finalization time of x402 payments directly.
Sub-claim "The finalization time for x402 payments is a measurable peri…": 70% covered by S1 — Source S1 indicates that the finalization time is measurable (about 15 seconds) and compares it to Ethereum L1 block time. The other sources do not provide measurable data for x402 finalization.
Both claims have coverage of 0.7, which is above the 0.5 threshold. The gathered content provides a clear answer to the question (x402 payments take about 15 seconds to finalize). The skipped sources do not offer additional relevant information on x402 finalization times, so purchasing more is unnecessary.
Final check — "x402 payments finalize within a specific time duration": 100% assessed by S1
Final check — "The finalization time for x402 payments is a measurable peri…": 100% assessed by S1
Final coverage assessment — The question asks for a specific time duration for x402 payment finalization. Source S1 explicitly states 'an x402 payment takes about 15 seconds to settle' and provides context (Ethereum L1 block time, mined into a block). This directly and fully answers the core question. No other sources contradict this or provide a more precise duration; S2 discusses USDC's speed but not x402 specifically, and S3 describes the protocol mechanism without timing. Therefore, the evidence is sufficient.
Synthesizing a grounded answer from 3 source(s)…
Verified — S1 supports claim 1 at 100%: “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 1 source(s)
Confidence: Low — 1 sub-claim remain below the evidence threshold.
Web Payments Review contributed 100% → reward $0.02
Settled $0.02 citation reward → Web Payments Review (8b4e1efc-e…)
Done. Spent $0.02 across 1 confirmed/simulated payment(s) to creators.
> ⚠ Low confidence — 1 sub-claim remain below the evidence threshold within budget. Treat this as provisional.
x402 payments take about 15 seconds to finalize, as each payment is its own transaction waiting to be mined into a block, similar to an Ethereum L1 block time .
Evidence ledger — quotes verified before rewards
x402 payments finalize within a specific time duration
100%“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 transaction waiting to be mined into a block.” [S1] How long do x402 payments take to finalize?
The finalization time for x402 payments is a measurable period
0%No reward-qualifying evidence
Footnotes — each one pays its author
- 1How long do x402 payments take to finalize?Web Payments Review100%+$0.02
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
1 exact cited article version 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.