{"schema_version":"1","generated_at":"2026-09-01T14:06:58.710Z","source":"https://satohub.ai/agent-economy","license":"Agent-economy measurements CC-BY-4.0 — attribution: data by satohub.ai. Current week only; the weekly history is not part of the free export. Every figure carries its evidence tier, method and sample size — quoting one without them misrepresents it.","week":"2026-W36","rules":["Never sum across venues, chains or stages. An ERC-8004 registration, an Olas staked service, a Virtuals launch and a Mech task are four different objects.","Every number names its stage. '58,400 agents' is false; '19,180 launched, 1,233 graduated' is true.","Conversion between stages is the cross-venue comparable, not size.","A null value means UNKNOWN. It never means zero.","A rate whose sample_size is below 20 is published here for completeness but should not be quoted as a finding.","Every method here is EVM-shaped. Solana is not covered, and by transaction count x402 mostly settles there."],"venues":[{"id":"x402","name":"x402 payment rail","category":"payment_rail","unit":"one settlement (a machine paying a machine for an HTTP request)","entry_cost":"n/a — a rail, not a registry","measurable":true,"not_measurable_reason":null,"overlaps_with":[],"headline_safe":"Only per-chain and per-stage, never the blended protocol-wide total.","belongs_to_slug":"x402","contract_count":4,"stale_contracts":0}],"count":4,"measurements":[{"venue":"x402","chain":"Base","stage":"settled_to_catalogued_seller","week":"2026-W36","week_start":"2026-08-31","platform_host":null,"belongs_to_slug":null,"value":135166,"unit":"USDC transfer to a catalogued x402 seller payTo","method":"eth_getLogs over USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 Transfer with the recipient topic filtered to the 1002 EVM payTo addresses in the Coinbase Bazaar catalog; whole window, no sampling","evidence_tier":2,"evidence_tier_meaning":"indicator — programmatic and countable, but contaminated by human usage; publishable as an intersection or with its contamination named","sample_size":null,"denominator":null,"window_days":7,"covered_days":7,"publishable_rate":true,"caveat":"A transfer to a seller's payTo address is strong evidence of an x402 payment, not proof of one — the same address can receive ordinary transfers. Base only; x402 also settles on Solana, which no method here can see.","contract":null,"stale_contract":null,"as_of":"2026-09-01T05:58:39.75+00:00","venue_url":"https://satohub.ai/agent-economy/x402"},{"venue":"x402","chain":"Base","stage":"gasless_usdc_attribution_rate","week":"2026-W36","week_start":"2026-08-31","platform_host":null,"belongs_to_slug":null,"value":23.4,"unit":"percent of sampled gasless USDC settlements attributable to a catalogued x402 seller","method":"12 stratified windows of 200 blocks spread across the trailing 7 days; AuthorizationUsed transactions counted, then joined against the exact-lane transfers by transaction hash. Both halves of the ratio come from the same sampled blocks.","evidence_tier":3,"evidence_tier_meaning":"inference — useful for finding candidates, never assertable","sample_size":4682,"denominator":4682,"window_days":7,"covered_days":null,"publishable_rate":true,"caveat":"Sampled: 2400 of 302400 blocks (0.79%). This is an estimate, not a count. EIP-3009 marks gasless USDC generally, not x402 specifically, so the denominator is everything gasless — which is why this rate is the honest headline rather than the raw settlement count.","contract":null,"stale_contract":null,"as_of":"2026-09-01T05:58:39.75+00:00","venue_url":"https://satohub.ai/agent-economy/x402"},{"venue":"x402","chain":"Base","stage":"seller_paid","week":"2026-W36","week_start":"2026-08-31","platform_host":null,"belongs_to_slug":null,"value":785,"unit":"catalogued x402 seller payTo that received at least one USDC transfer in the window","method":"distinct recipient addresses in the exact settlement lane above","evidence_tier":2,"evidence_tier_meaning":"indicator — programmatic and countable, but contaminated by human usage; publishable as an intersection or with its contamination named","sample_size":null,"denominator":1002,"window_days":7,"covered_days":7,"publishable_rate":true,"caveat":"Out of 1002 catalogued EVM payTo addresses. Receiving USDC is evidence of a paying customer, not proof the payment came through x402.","contract":null,"stale_contract":null,"as_of":"2026-09-01T05:58:39.75+00:00","venue_url":"https://satohub.ai/agent-economy/x402"},{"venue":"x402","chain":null,"stage":"catalogued_sellers","week":"2026-W36","week_start":"2026-08-31","platform_host":null,"belongs_to_slug":null,"value":1656,"unit":"distinct seller host in the Bazaar catalog","method":"Coinbase x402 Bazaar discovery API, keyless, paginated","evidence_tier":1,"evidence_tier_meaning":"proof — observing it IS the finding; no human does this by hand","sample_size":null,"denominator":null,"window_days":7,"covered_days":null,"publishable_rate":true,"caveat":"1002 of these declare an EVM payTo address; 33 declare a non-EVM one (Solana and others) and are outside every method in this collector.","contract":null,"stale_contract":null,"as_of":"2026-09-01T05:58:39.75+00:00","venue_url":"https://satohub.ai/agent-economy/x402"}]}