Onchain Micropayments Digest is cached (free) and its preview directly addresses sub-claim 0: batched settlement drops the economical floor to a millionth of a dollar, which is exactly the 'main point' of blockchains for tiny automated payments. Best topical match, zero cost. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).

Agent Economy Weekly is cached and its preview (x402 lets a server demand payment and an agent pay inline) speaks to the 'automated' half of sub-claim 0 — machines making small payments without humans. Free to reuse; complements rather than duplicates the nanopayments-floor source. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).

Arc Settlement Benchmarks is cached and its preview (x402 batched-settlement finality lab results on Arc) supports sub-claim 0 by evidencing the feasibility of settling tiny payments quickly. Free, and it adds measured latency facts the two editorial sources lack. — cached bytes are free, but this read does not clear the attention gate (EV 0.40, minimum 0.45, with a required claim target).

Distributed Systems Notes is cached and its preview (idempotency keys make retries safe, preventing double-spends) supports sub-claim 0's 'automated' angle — unattended payment flows need retry-safe primitives. Cheap and cached, so low-risk breadth. — cached bytes are free, but this read does not clear the attention gate (EV 0.35, minimum 0.45, with a required claim target).

This is the only Vitalik Buterin's website candidate, so it is the sole route to sub-claim 1 — but the preview is title-only ('Low-risk defi can be for Ethereum what search was for Google'), deliveryKind is metadata_only with plaintextBytes 0, and the title concerns low-risk DeFi, not blockchains for tiny automated payments. No preview text supports claim 1, and paying $0.004 for metadata-only output risks buying nothing usable; targets must therefore be empty.

Web Payments Review's x402-finality abstract overlaps with the cached Arc Settlement Benchmarks and Onchain Micropayments sources already covering sub-claim 0; it carries the lowest citation weight (avg 0.64) of the recurring sources. Redundant, so skip despite being cheap.

Stablecoin Ledger covers USDC instant settlement generally, not tiny automated payments specifically, and it has the weakest track record on this subject (1 of 5 runs cited, weight 0.35). Insufficiently distinct from the cached nanopayments/settlement sources for sub-claim 0.

The Ethereum Foundation post is about AI agents triaging protocol security code, not about payments on Ethereum — it does not address either sub-claim 0 (main point of tiny automated payments) or sub-claim 1 (Vitalik's website's stance on them).

Cointelegraph's ECB merchant-adoption survey is about crypto acceptance rates at merchants, not the mechanics or thesis of tiny automated payments, and this source has never been cited when read on this subject. Preview does not support either sub-claim.

CoinDesk's dollar-vs-euro stablecoin supply gap is macro adoption commentary, not blockchains for tiny automated payments, and it has never earned a citation when read on this subject.

The Coinbase WSJ response is a 2022 PR rebuttal about proprietary trading, unrelated to micropayments or Vitalik's views; Stripe Blog, Decrypt, Latent.Space and the other public-reference feeds are likewise off-topic or zero-citation on this subject.

Keryx Engineering is the strongest source overall on this subject (50% citation rate, highest reputation), but its cached preview is about buyer recovery for paid research jobs — it does not speak to the main point of tiny-payment blockchains or to Buterin's website. Free to cache in principle, but the preview supports no target here, so it cannot justify a read.