Breaking down: "Can you give a concrete example of blockchains for tiny automated payments using published source material?"

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 3/6 positive proposal(s): 3 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 Agent Economy Weekly — x402 turns HTTP 402 into an agent payment rail (free) — S2

Reused cached Web Payments Review — How long do x402 payments take to finalize? (free) — S3

Sub-claim "Which blockchains are used for tiny automated payments?": 70% covered by S1, S2 — S1 names Arc (Arc testnet) as a blockchain where x402 batched settlements finalize in ~180ms, and S2 documents x402 as a per-request agent payment rail. Together they identify Arc as a blockchain used for tiny automated payments. The answer is direct but limited to one named chain; no broader survey of chains is provided.

Sub-claim "What concrete example of a blockchain for tiny automated pay…": 80% covered by S1, S2 — S1 gives a concrete documented example: thousands of submitBatch calls on Arc testnet, x402 batched settlements finalizing in roughly 180ms median (178ms, p95 240ms), with Arc's BFT consensus delivering sub-second finality. S2 supplies the x402 per-request payment mechanism. This is a direct concrete example, though S3 offers a conflicting 15-second Ethereum L1-style settlement view that is not reconciled.

Coverage is adequate for both sub-claims: Arc is explicitly named as the blockchain, and a concrete documented example (x402 batched settlement on Arc testnet with ~180ms finality) is provided. No affordable skipped source clearly fills a remaining gap; the skipped items concern stablecoins, idempotency, disputes, or unrelated topics, not additional concrete blockchain examples for tiny automated payments. Remaining budget is small and buying more is not warranted.

Final check — "Which blockchains are used for tiny automated payments?": 80% assessed by S1

Final check — "What concrete example of a blockchain for tiny automated pay…": 80% assessed by S1

Final coverage assessment — S1 documents a concrete blockchain (Arc) used for tiny automated payments via x402 batched settlements, with measured finality (~180ms median). S2 provides topical context on x402 as an agent payment rail but does not name a specific blockchain. S3 discusses x402 settlement timing but names no blockchain and is a general timing view, not a concrete blockchain example. The requested concrete example is directly supported by S1; no requested part remains missing.

Synthesizing a grounded answer from 3 source(s)…

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

⚖️ Sources disagreed on x402 settlement timing — S1 x402 batched settlements on Arc testnet finalize in roughly 180 milliseconds, with sub-second finality and not block-time-bound like Ethereum L1. vs S3 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 provides a specific measured benchmark on Arc testnet and is internally consistent with its described BFT consensus, whereas S3 is a general reading without Arc-specific measurement.)

Verified — S1 supports claim 1 at 70%: “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…”

Verified — S1 supports claim 2 at 90%: “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 20%: “Agents can therefore pay per request with no accounts or API keys, discovering and purchasing data autonomously at runtime.”

Verified — S3 supports claim 2 at 60%: “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 2 source(s)

Confidence: Moderate — source preferences are explained, but conflicting evidence limits confidence.

Arc Settlement Benchmarks contributed 70% → reward $0.0105

Web Payments Review contributed 30% → reward $0.0045

Settled $0.0105 citation reward → Arc Settlement Benchmarks (0234857e-c…)

Settled $0.0045 citation reward → Web Payments Review (04389f5c-7…)

Done. Spent $0.015 across 2 confirmed/simulated payment(s) to creators.