What is the Arc blockchain and what currency does it use?

Archived dispatch

Lowconfidence— 1 sub-claim remains below the evidence threshold

9/20/2026, 5:47:48 PM · llm:deepseek:deepseek-v4-flash + llm:mimo:mimo-v2.5 on 1 step

The dispatch, itemised.

§ IThe decision$0.01 / $0.02

50%$0.01 under cap

Decompose

Breaking down: "What is the Arc blockchain and what currency does it use?"

Decompose

Identified 2 research target(s) to investigate; these are not established facts

Decompose

Deep mode: up to 4 paid/cached reads plus one bounded gap-expansion pass when needed.

Discover

Discovered 21 verified source(s)

Discover

Recalled 18 past runs on this subject — how these sources performed when they were available.

Discover

ERC-8004 reputation loaded — composite scores on this subject.

Pre-check

Claim-aware portfolio selected 2/3 positive proposal(s): 2 cached + 0 fresh, predicting 2/2 claim(s) above the evidence floor with $0.000000/$0.010000 fetch USDC reserved.

Pre-check

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

DecideCACHE

Arc Settlement Benchmarks — Measuring x402 settlement latency on Arc$0.003 · EV 90%

High-reputation source (95/100) on Arc settlement topics. While the preview focuses on latency benchmarks, the full article is highly likely to define Arc and its native currency (USDC or similar). Essential for answering both claims about Arc's nature and currency. Reused from cache. — selected for the claim-aware evidence portfolio (targets claims 1, 2; 0 fetch USDC, 1 attention slot).

DecideCACHE

CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data — How Circle’s institutional Arc blockchain got taken over by memecoins on day one$0.002 · EV 85%

Directly names 'Circle’s institutional Arc blockchain' and covers its launch day and memecoin activity. This is the only source that explicitly mentions Arc as a blockchain. Preview is abstract and may have limited detail on what Arc is or its currency, but it's the strongest match available. Reused from cache. — selected for the claim-aware evidence portfolio (targets claims 1, 2; 0 fetch USDC, 1 attention slot).

DecideSKIP

Stripe Blog — New currency capabilities for global businesses to cut FX costs$0.002 · EV 80%

Stripe Blog has perfect historical citation rate (100%) on this subject. Preview discusses multicurrency settlement and FX, which is directly relevant to understanding what currency Arc uses. Highly likely to provide authoritative context. Reused from cache. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.010000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

Garden & Soil Monthly — Building a no-dig raised bed$0.002 · EV 0%

Gardening content is completely irrelevant to blockchain or cryptocurrency questions.

DecideSKIP

Retro Game Hardware — Recapping a 1990s console$0.002 · EV 0%

Retro gaming hardware restoration is unrelated to blockchain technology.

DecideSKIP

Inner Axiom — The Codex — The Journey of the Soul$0.002 · EV 0%

Esoteric spiritual content has no connection to blockchain or cryptocurrency topics.

DecideSKIP

Conzit Labs — Kanye West Faces Lawsuit Over AI Use in New Albums$0.002 · EV 0%

Celebrity lawsuit about AI in music is irrelevant to understanding Arc blockchain.

DecideSKIP

Stablecoin Ledger — Why USDC settles instantly onchain$0.003 · EV 30%

Stablecoin Ledger covers USDC settlement, but the preview doesn't mention Arc. While Arc might use USDC, this source lacks direct relevance to defining Arc itself. Low historical citation rate (0/3) suggests limited value for this specific question.

DecideSKIP

Agent Economy Weekly — x402 turns HTTP 402 into an agent payment rail$0.004 · EV 20%

Agent Economy Weekly discusses x402 payment rails, which might be used on Arc, but doesn't directly explain what Arc is or its currency. Never cited in previous runs on this subject.

DecideSKIP

Onchain Micropayments Digest — Nanopayments and the $0.000001 floor$0.005 · EV 10%

Micropayments content is tangentially related to blockchain payments but doesn't address Arc specifically.

DecideSKIP

Distributed Systems Notes — Idempotency keys prevent double-spends$0.003 · EV 10%

Distributed systems notes on idempotency are too generic to answer specific questions about Arc blockchain.

DecideSKIP

Cointelegraph.com News — Crypto payments barely register among euro area merchants, ECB finds$0.002 · EV 20%

Cointelegraph article about crypto payments in Europe doesn't discuss Arc blockchain.

DecideSKIP

Latent.Space — Ontologies Are So Back: Why AI Agents Are Reviving the Semantic Web$0.004 · EV 10%

AI agents and ontologies content is unrelated to blockchain technology questions.

DecideSKIP

Simon Willison's Weblog — Anthropic’s best AI model struggles to attract users as cheaper tools thrive$0.003 · EV 0%

AI model usage trends are completely irrelevant to blockchain questions.

DecideSKIP

Hugging Face - Blog — Holo3.1: Fast & Local Computer Use Agents$0.003 · EV 0%

Computer use agents are not related to blockchain or cryptocurrency topics.

DecideSKIP

Vitalik Buterin's website — Low-risk defi can be for Ethereum what search was for Google$0.004 · EV 30%

Vitalik's DeFi article might discuss Ethereum, but not Arc specifically. Metadata only, so content is uncertain.

DecideSKIP

The Coinbase Blog - Medium — In response to the Wall Street Journal$0.003 · EV 10%

Coinbase blog about proprietary trading doesn't address Arc blockchain.

DecideSKIP

Decrypt — Crypto Group Warns Fed Could Use Banking Access to Squeeze Digital Asset Firms$0.002 · EV 10%

Fed banking access article is about regulatory issues, not Arc blockchain specifics.

DecideSKIP

Web Payments Review — How long do x402 payments take to finalize?$0.002 · EV 40%

Web Payments Review covers x402 timing, which might relate to Arc, but has low historical citation rate (29%). The preview doesn't mention Arc directly, so less likely to define it.

DecideSKIP

Keryx Engineering (first-party) — Recovering a Keryx paid research job$0.002 · EV 20%

Keryx Engineering notes about buyer recovery are first-party documentation, not independent reporting on Arc blockchain's nature or currency.

Fetch

Agent spend wallet ready: 0x29028Fe1122E17Fe7863A22701e863FE4DaE1aFB (balance sufficient)

Fetch

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

Fetch

Reused cached CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data — How Circle’s institutional Arc blockchain got taken over by memecoins on day one (free) — S2

Re-evaluate

Sub-claim "What is the Arc blockchain?": 40% covered by S1, S2 — S1 identifies Arc as a blockchain with BFT consensus and sub-second finality, operating an Arc testnet, and S2 identifies it as Circle's institutional blockchain (an L2 backed by BlackRock per the title). Together these give partial identification (Circle's L2 blockchain), but no supplied passage explicitly defines what Arc is or its purpose beyond these fragments.

Re-evaluate

Sub-claim "What currency does the Arc blockchain use?": 0% covered — No supplied passage states the currency or token used by Arc. S1 mentions x402 batched settlements and Gateway but names no currency; S2 mentions memecoins but not Arc's native/used currency.

Re-evaluate

The currency sub-claim is entirely uncovered (0.0). The only affordable skipped source plausibly relevant to Arc's currency is 'Stablecoin Ledger — Why USDC settles instantly onchain' ($0.003), which may indicate USDC as the settlement currency for Circle's Arc. Other skipped sources concern unrelated topics (gardening, retro consoles, Kanye, etc.) or x402 timing/agent payments already covered by S1, so they are not worth buying. Budget ($0.01) permits this single purchase.

Re-evaluate

Filling gap — buying Stablecoin Ledger — Why USDC settles instantly onchain ($0.003)…

Re-evaluate

Paid $0.003 to Stablecoin Ledger — Why USDC settles instantly onchain (settled b92f0bcc-4…) — S3

Sufficiency

Final check — "What is the Arc blockchain?": 50% assessed by S1, S2

Sufficiency

Final check — "What currency does the Arc blockchain use?": 0% assessed

Sufficiency

Final coverage assessment — The gathered sources provide only partial answers. S1 describes Arc as a blockchain with BFT consensus and sub-second finality, but does not define what Arc is beyond that. S2 identifies Arc as Circle's blockchain, adding that it is a Circle blockchain, but no currency is named. S3 discusses USDC settlement generally but does not state that Arc uses USDC. No source explicitly answers what currency the Arc blockchain uses. The assessment does not establish a complete supported answer for every requested part.

Synthesize

Synthesizing a grounded answer from 3 source(s)…

Evidence

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

Evidence

Verified — S1 supports claim 1 at 50%: “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…”

Evidence

Verified — S2 supports claim 1 at 40%: “Circle blockchain Arc's first day was dominated by memecoins, and the traders behind them had already moved on by Thursday morning.”

Evidence

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

Synthesize

Drafted answer citing 2 source(s)

Verdict

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

Attribute

Arc Settlement Benchmarks contributed 50% → reward $0.005

Attribute

CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data contributed 50% → reward $0.005

Settle

Settled $0.005 citation reward → Arc Settlement Benchmarks (b21f5774-2…)

Settle

Settled $0.005 citation reward → CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data (ee2f1cfd-5…)

Done

Done. Spent $0.013 across 3 confirmed/simulated payment(s) to creators.

§ IIIThe settlementweighted · USDC on Arc

50%

Arc Settlement Benchmarks

batched

50%$0.005

CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data

batched

50%$0.005

Settled · USDC on Arc ↗$0.01

§ IIThe reading2 cited

Lowconfidence— 1 sub-claim remains below the evidence thresholddeep researchpreview plan 2/2 claimsportfolio 2/3 · evidence 100%

> ⚠ Low confidence — 1 sub-claim remains below the evidence threshold within budget. Treat this as provisional.

The supplied sources do not directly define what the Arc blockchain is. The closest identification comes from a CoinDesk abstract, which refers to "Circle blockchain Arc" and describes its first day being dominated by memecoins . Separately, an Arc Settlement Benchmarks abstract describes Arc as a network with BFT consensus delivering sub-second finality, where x402 batched settlements finalize in roughly 180 milliseconds . Neither source explicitly states what Arc is in definitional terms, so that part of the question remains unanswered beyond these descriptions.

As for the currency Arc uses, none of the supplied sources state which currency Arc uses. The Stablecoin Ledger abstract discusses USDC as a fully-reserved dollar stablecoin that settles onchain in seconds, but it does not link USDC to Arc, so it cannot be used to answer this question. This part of the question is therefore unanswered by the provided sources.

Evidence ledger — quotes verified before rewards

What is the Arc blockchain?
50%
“Arc's BFT consensus delivers sub-second finality, so a Gateway-batched payment confirms in well under a quarter second — it is not block-time-bound the way an Ethereum L1 transaction is.” [S1] Measuring x402 settlement latency on Arc
“Circle blockchain Arc's first day was dominated by memecoins, and the traders behind them had already moved on by Thursday morning.” [S2] How Circle’s institutional Arc blockchain got taken over by memecoins on day one
What currency does the Arc blockchain use?
0%
No reward-qualifying evidence

Footnotes — each one pays its author

1Measuring x402 settlement latency on ArcArc Settlement Benchmarks50%+$0.005
2How Circle’s institutional Arc blockchain got taken over by memecoins on day oneCoinDesk: Bitcoin, Ethereum, Crypto News and Price Data · 2026-09-1750%+$0.005

Helpful?

Spent$0.013

To creators100%

Decisions0 bought · 2 cached · 18 skipped

llm:deepseek:deepseek-v4-flash + llm:mimo:mimo-v2.5 on 1 step

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.

View JSON ↗Download

New material since this dispatch

2 new posts have been published by 1 of the 2 sources this answer cited. This dispatch never read them — it settled before they existed.

2/2 exact cited article versions still match the current Keryx index; new posts are separate assets this dispatch never read.