What is USDC? — Keryx Dispatch

Archived dispatch

What is USDC?

Moderateconfidence— 1 evidence-verified source cover every sub-claim, but corroboration or support strength is limited

9/20/2026, 5:58:34 PM · llm:deepseek:deepseek-v4-flash + heuristic (fallback from llm:mimo:mimo-v2.5) on 1 step

The dispatch, itemised.

§ IThe decision$0.05 / $0.1

50%$0.05 under cap

Decompose

Breaking down: "What is USDC?"

Decompose

Identified 1 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 47 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 1/4 positive proposal(s): 1 cached + 0 fresh, predicting 1/1 claim(s) above the evidence floor with $0.000000/$0.050000 fetch USDC reserved.

Pre-check

Free-preview pre-check maps an actionable source to every sub-claim (1/1); paid reading may proceed within the budget.

DecideCACHE

The Coinbase Blog - Medium — In response to the Wall Street Journal$0.003 · EV 100%

Already cached and still relevant (matches usdc); reuse for free instead of paying again. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).

DecideSKIP

Stablecoin Ledger — Why USDC settles instantly onchain$0.003 · EV 100%

Already cached and still relevant (matches usdc); reuse for free instead of paying again. — the claim-aware portfolio chose a stronger, less redundant set inside the 4-source attention and $0.050000 fetch-budget caps, so this proposal stays unspent.

DecideSKIP

Agent Economy Weekly — x402 turns HTTP 402 into an agent payment rail$0.004 · EV 0%

Weak match (no key terms); not worth 0.004 USDC.

DecideSKIP

Onchain Micropayments Digest — Nanopayments and the $0.000001 floor$0.005 · EV 0%

Weak match (no key terms); not worth 0.005 USDC.

DecideSKIP

Distributed Systems Notes — Idempotency keys prevent double-spends$0.003 · EV 0%

Weak match (no key terms); not worth 0.003 USDC.

DecideSKIP

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

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

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

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

Stripe Blog — Rethinking risk in the age of AI$0.002 · EV 0%

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

Ethereum Foundation Blog — The triage is the product: running AI agents against Ethereum's protocol code$0.002 · EV 0%

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

Cointelegraph.com News — Circle to acquire Tazapay to expand USDC cross-border payments$0.002 · EV 100%

DecideSKIP

Latent.Space — Ontologies Are So Back: Why AI Agents Are Reviving the Semantic Web$0.004 · EV 0%

Weak match (no key terms); not worth 0.004 USDC.

DecideSKIP

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

Weak match (no key terms); not worth 0.003 USDC.

DecideSKIP

Hugging Face - Blog — Give Your Coding Agents a Memory You Own$0.003 · EV 0%

Weak match (no key terms); not worth 0.003 USDC.

DecideSKIP

Vitalik Buterin's website — Low-risk defi can be for Ethereum what search was for Google$0.004 · EV 0%

Weak match (no key terms); not worth 0.004 USDC.

DecideSKIP

Decrypt — Putin Signs Russia's First Crypto Law: Trading Is Legal, Payments Stay Banned$0.002 · EV 0%

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data — Crypto Long & Short: Inside the 300-to-1 onchain gap between the dollar and euro$0.002 · EV 0%

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

Inner Axiom — The Codex — ISIS: The Godess, From An Esoteric Perspective$0.002 · EV 0%

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

Conzit Labs — Videographer's Equipment Damaged in Onstage Incident with Artist$0.002 · EV 0%

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

Arc Settlement Benchmarks — Measuring x402 settlement latency on Arc$0.003 · EV 0%

Weak match (no key terms); not worth 0.003 USDC.

DecideSKIP

Web Payments Review — How long do x402 payments take to finalize?$0.002 · EV 0%

Weak match (no key terms); not worth 0.002 USDC.

DecideSKIP

Keryx Engineering (first-party) — Recovering a Keryx paid research job$0.002 · EV 100%

Fetch

Agent spend wallet ready: 0x29028Fe1122E17Fe7863A22701e863FE4DaE1aFB (balance sufficient)

Fetch

Reused cached The Coinbase Blog - Medium — In response to the Wall Street Journal (free) — S1

Re-evaluate

Sub-claim "What is USDC?": 10% covered — The only gathered passage (S1) discusses Coinbase's response to the WSJ about proprietary trading and does not define or explain USDC. Skipped-source previews mention USDC (e.g., 'Why USDC settles instantly onchain', 'Circle to acquire Tazapay to expand USDC cross-border payments'), providing only topical context, not a definition. No supplied text explicitly answers what USDC is.

Re-evaluate

Coverage for the sole sub-claim is below 0.5 and no gathered passage defines USDC. Two affordable skipped sources fit the remaining $0.05 budget and are most likely to supply a direct answer: the Stablecoin Ledger piece on why USDC settles instantly onchain ($0.003) and the Cointelegraph item on Circle expanding USDC cross-border payments ($0.002). Other skipped sources are unrelated to USDC or only tangentially relevant.

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 c2fa5c21-6…) — S2

Re-evaluate

Filling gap — buying Cointelegraph.com News — Circle to acquire Tazapay to expand USDC cross-border payments ($0.002)…

Re-evaluate

Paid $0.002 to Cointelegraph.com News — Circle to acquire Tazapay to expand USDC cross-border payments (settled 0c129821-2…) — S3

Sufficiency

Final check — "What is USDC?": 100% assessed by S2

Sufficiency

Final coverage assessment — The question asks what USDC is. Source S2 directly defines USDC as a fully-reserved dollar stablecoin that settles peer-to-peer onchain in seconds, fully answering the definitional question. S1 is about Coinbase proprietary trading and does not define USDC. S3 mentions USDC in the context of Circle's cross-border payments but does not define it. Therefore the single sub-claim is fully covered by S2.

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 — S2 supports claim 1 at 100%: “USDC is a fully-reserved dollar stablecoin that settles peer-to-peer onchain in seconds.”

Evidence

Below reward gate — S2 supports claim 1 at 10%: “Because settlement is final and programmable, it removes the multi-day delays of card networks and ACH.”

Evidence

Rejected 0 invalid evidence span(s) and 2 unsupported citation marker(s); rejected markers cannot receive citation rewards.

Synthesize

Drafted answer citing 1 source(s)

Verdict

Confidence: Moderate — 1 evidence-verified source cover every sub-claim, but corroboration or support strength is limited.

Attribute

Stablecoin Ledger contributed 100% → reward $0.05

Settle

Settled $0.05 citation reward → Stablecoin Ledger (37cf5194-e…)

Done

Done. Spent $0.055 across 3 confirmed/simulated payment(s) to creators.

§ IIIThe settlementweighted · USDC on Arc

100%

Stablecoin Ledger

batched

100%$0.05

Settled · USDC on Arc ↗$0.05

§ IIThe reading1 cited

Moderateconfidence— 1 evidence-verified source cover every sub-claim, but corroboration or support strength is limiteddeep researchpreview plan 1/1 claimsportfolio 1/4 · evidence 0%

USDC is a fully-reserved dollar stablecoin that settles peer-to-peer onchain in seconds . Because that settlement is final and programmable, it removes the multi-day delays of card networks and ACH . The other supplied passages do not define USDC: one concerns Coinbase's response to the Wall Street Journal about proprietary trading, and another mentions Circle's USDC payments reach in the context of acquiring Tazapay.

Evidence ledger — quotes verified before rewards

What is USDC?
100%
“USDC is a fully-reserved dollar stablecoin that settles peer-to-peer onchain in seconds.” [S2] Why USDC settles instantly onchain

Footnotes — each one pays its author

2Why USDC settles instantly onchainStablecoin Ledger100%+$0.05

Helpful?

Spent$0.055

To creators100%

Decisions0 bought · 1 cached · 20 skipped

llm:deepseek:deepseek-v4-flash + heuristic (fallback from 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

Exact receipt still current

1 exact cited article version still match Keryx's current index.

Inspect machine-readable audit

Ask a follow-upNew dispatch · creators paid again

Carries this dispatch’s question as context — never its answer. The next dispatch is read from sources bought for it.

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