This is the exact caller-requested first-party Keryx Engineering article URL; a free read of the bounded whole document is the most direct way to answer all four targets (toll vs reward, paid-read guarantee, unqualified citation pool, reward limitation). - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claims 1, 2, 3, 4; 0 fetch USDC, 1 attention slot).

This is the registered first-party Keryx Engineering full article 'How Keryx pays cited creators' at the stated 2026-09-08 revision, explicitly covering access tolls, citation rewards, exact-quote evidence checks, contribution weights and settlement limits — the authoritative source for all four targets. At 0.002 USDC it fits the 0.02 budget and is the eligible registered creator route. — selected for the claim-aware evidence portfolio (targets claims 1, 2, 3, 4; $0.002000 fetch USDC, 1 attention slot).

arXiv philanthropy news is unrelated to Keryx access tolls, citation rewards, or citation pool behavior; no target is worth investigating here. - free public feed reference; no purchase or creator reward.

BIS gold-price research has no bearing on Keryx creator-payment receipts or citation reward mechanics. - free public feed reference; no purchase or creator reward.

Open-source AI tool survey does not address Keryx access tolls, citation rewards, or pool handling. - free public feed reference; no purchase or creator reward.

Cloudflare Workers module registry engineering is unrelated to Keryx citation reward documentation. - free public feed reference; no purchase or creator reward.

Creative Commons heritage roundtable concerns open licensing, not Keryx's toll-versus-reward distinction or citation pool rules. - free public feed reference; no purchase or creator reward.

DeepMind private AI compute memory announcement has no relevance to Keryx creator-payment receipts. - free public feed reference; no purchase or creator reward.

DOAJ library publishing toolkit post does not discuss Keryx access tolls, citation rewards, or citation pools. - free public feed reference; no purchase or creator reward.

Docker/CNCF agent permissions spec is unrelated to Keryx citation reward mechanics. - free public feed reference; no purchase or creator reward.

DuckDB plain-English SQL conditions article does not cover Keryx payment or citation reward topics. - free public feed reference; no purchase or creator reward.

Long-context QA evaluation writing is unrelated to Keryx access tolls, citation rewards, or pool behavior. - free public feed reference; no purchase or creator reward.

Go inliner blog post has no bearing on Keryx creator-payment receipts or citation reward documentation. - free public feed reference; no purchase or creator reward.

ToolGrad dataset generation research is unrelated to Keryx citation reward mechanics. - free public feed reference; no purchase or creator reward.

LLM autonomous agents overview does not address Keryx access tolls, citation rewards, or citation pool handling. - free public feed reference; no purchase or creator reward.

Microsoft Research Asia Singapore lab update has no relevance to Keryx creator-payment receipts. - free public feed reference; no purchase or creator reward.

Netlify Git infrastructure interview is unrelated to Keryx citation reward documentation. - free public feed reference; no purchase or creator reward.

Ollama Jev-style decision models announcement does not discuss Keryx access tolls, citation rewards, or citation pools. - free public feed reference; no purchase or creator reward.

OpenAI Developers plugin setup guide has no bearing on Keryx creator-payment receipts. - free public feed reference; no purchase or creator reward.

OpenAlex affiliation-error post touches bibliometrics but not Keryx's toll-versus-reward distinction, paid-read guarantee, or citation pool rules. - free public feed reference; no purchase or creator reward.

PostgreSQL BM25 extension news is unrelated to Keryx citation reward mechanics. - free public feed reference; no purchase or creator reward.

PyTorch conference training announcement does not address Keryx access tolls, citation rewards, or pool behavior. - free public feed reference; no purchase or creator reward.

Rust debugging survey results have no relevance to Keryx creator-payment receipts. - free public feed reference; no purchase or creator reward.

MiMo-V2.6 Pro architecture notes are unrelated to Keryx citation reward documentation. - free public feed reference; no purchase or creator reward.

Spotify AI build-quality article does not discuss Keryx access tolls, citation rewards, or citation pools. - free public feed reference; no purchase or creator reward.

Stripe fraud data for AI startups concerns payments risk, not Keryx's toll-versus-reward distinction or citation pool handling. - free public feed reference; no purchase or creator reward.

Supabase product recap about Postgres/application services; unrelated to Keryx access tolls, citation rewards or citation pools. - free public feed reference; no purchase or creator reward.

Tailscale PAM networking/security post; no bearing on Keryx creator-payment receipts or citation mechanics. - free public feed reference; no purchase or creator reward.

ML engineering keynote transcript; unrelated to the specified Keryx Engineering article and its payment semantics. - free public feed reference; no purchase or creator reward.

vLLM disaggregated serving guide; concerns inference infrastructure, not Keryx tolls/rewards. - free public feed reference; no purchase or creator reward.

Wikimedia community documentation story; different subject entirely from Keryx citation rewards. - free public feed reference; no purchase or creator reward.

x402 Foundation launch announcement is background on the payment protocol Keryx uses, but it does not state Keryx's toll-vs-reward distinction, guarantee rules, pool handling or reward limitations. - free public feed reference; no purchase or creator reward.

Caller-supplied Keryx Engineering feed.xml; free read may confirm the article's stated revision/date and first-party provenance, supporting targets 0-3 indirectly. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.010000 fetch-budget caps, so this proposal stays unspent.

Keryx's own site describes the two-toll model (access toll for a read, separate weighted reward for a cited answer) and Arc testnet USDC settlement, directly relevant to targets 0-2 as first-party product documentation. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.010000 fetch-budget caps, so this proposal stays unspent.

LinkedIn promotional post about Keryx paying a creator; social announcement, not the specified engineering article, and unlikely to state the toll/reward distinction, guarantee or pool rules. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Estimize page about Keryx Biopharmaceuticals (KERX) earnings estimates; a different company entirely, irrelevant to Keryx creator payments. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Keryx-Labs desktop wallet for on-chain AI inference mining rewards; a different Keryx product line, not the citation-reward documentation requested. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Bitcointalk ANN about Keryx GPU PoW mining and on-chain inference; unrelated to access tolls, citation rewards or citation pools. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

YouTube tutorial on mining KRX on Windows; no relevance to Keryx creator-payment receipt semantics. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Keryx-Labs on-chain AI inference page; describes miner inference flow, not the citation-reward documentation targets. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Activity page for an unrelated 'keryx' Android chat app by a different owner; no connection to the Keryx payment protocol. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Fireworks AI billing-operations job posting; unrelated to Keryx citation rewards. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Keryx's own answers archive shows a cited answer summarizing the access-toll vs citation-reward distinction from Keryx Engineering (first-party), useful corroboration for targets 0-2 though secondary to the article itself. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.010000 fetch-budget caps, so this proposal stays unspent.

Glama listing describes the two-toll x402 design (fixed access toll plus dynamic citation reward, uncited earns only the toll, cited earns more after a grounding gate), directly relevant to targets 0-2 and the reward-limitation target 3. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.010000 fetch-budget caps, so this proposal stays unspent.

Keryx-Labs node release notes about the Proof-of-Model hardfork; mining protocol, not creator citation payments. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

Paid Keryx owner release notes abstract (v0.27.10) covers research/security fixes, not the toll-vs-reward, guarantee, pool or limitation content; the free requested article is the better spend.