{"title":"The x402 Polygon rail, measured from the declared payTo addresses (2026-09-11)","what":"Independent 30-day measurement of USDC inflow to every payTo address published in the live x402 discovery docs of the 55 Polygon-declaring services in the canonical x402 directory (x402-list.com, 685 services) — on Polygon (native USDC primary, bridged USDC.e secondary) and on Base as a control. The 09-09 census's directory measurement reported 'Polygon = 55 declared / $1,115 / 1,540 tx in 30d'; this file measures what the declared wallets actually received.","generated_at":"2026-09-11T15:40:00Z","window":"30 days: polygon window start block 91892847 (1786544298 = 2026-08-12) to head 93620844 (2026-09-11 14:18 UTC); base window start block 49878982 (2026-08-12T15:08) to head 51174982 (2026-09-11 15:1x UTC)","sources":{"directory":"x402-list.com/api/v1/services (685 services, pulled 2026-09-11 01:14 UTC; 55 declare eip155:137 Polygon in networks_caip2 — same population as the 09-09 census pull)","discovery_docs":"live GET /.well-known/x402 per declaring service, crawled 6x 2026-09-11 13:1x-14:1x UTC (all 6 passes agree: 42 of 55 reachable, 13 offline, 17 of the 42 still declare eip155:137 in the live doc); raw docs retained in .tmp-tests/polygon-docs-0911/ as evidence","polygon_chain":"Polygon PoS (chain 137). PRIMARY token: native Circle USDC 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 ('USD Coin', 6 decimals, contract code verified on-chain 09-11 14:1x — THE address the declaring docs themselves name in their eip155:137 accepts.asset fields). SECONDARY pass: bridged USDC.e 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 (also reads symbol() = 'USDC' — symbol alone cannot distinguish the variants; the doc-declared asset is authoritative). USDC Transfer logs (topic0 ddf252ad…, topic3 = padded declared payTo), block-anchored 30-day window, 34 contiguous 50k-block windows on polygon.gateway.tenderly.co/public (0 RPC errors). RPC note: polygon-bor-rpc.publicnode.com PRUNES getLogs history beyond ~85k blocks ('History has been pruned for this block' — verified 09-11); drpc 400 / blastapi 403 / llamarpc DNS-dead / polygon-rpc.com 401 / omniatech 521 / 1rpc 50-block cap on this chain. The FIRST measurement pass used USDC.e and read all-zero; the native pass is the primary number.","base_chain":"Base (chain 8453) native USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — base.gateway.tenderly.co/public eth_getLogs, 1000-block windows (tenderly public cap), block-anchored, 0 RPC errors, as a control: the same 8 addresses over the same window. All 3 public Base RPCs (publicnode/drpc/mainnet.base.org) gate eth_getLogs as of 09-11 14:2x (403/400/413 — they served it fine 09-10)."},"method":["1. Pull the full directory (685 rows, 09-11 01:14 UTC) and filter the 55 services whose networks_caip2 includes eip155:137.","2. Crawl each live /.well-known/x402 doc (42 reachable; crawled 6x, all passes agree); parse declared networks + every payTo across all observed doc shapes (v1 routes[], v2 resources[].accepts[] + global payTo, per-chain accepts, acceptedNetworks/supportedRails/pay_to key candidates).","3. 17 of the 42 readable live docs still declare eip155:137. Across the 55 docs, 8 distinct USDC payTo addresses are published: 4 services publish per-route Polygon payTo entries (sean-claude-van-damme 62, saylor-innovations-watchdog 26, khotem-cryptographic-witness 25, x402-extract-api 5), the other 4 addresses are single-wallet docs (arch-tools, deskcrew, kr-crypto-intelligence, and the 6-service japan-* family sharing one wallet). 4 of the 17 live declarers publish no wallet at all (agentbit, anchor-x402, edge-agents-ai, onchainpulse — facilitator-held or omitted).","4. Per address: 30-day USDC Transfer inflow on Polygon, NATIVE USDC (the doc-declared token), 34 contiguous getLogs windows, 0 RPC errors. SECONDARY pass on USDC.e for all 8 addresses (0 tx / $0 — the volume is on the native contract). CAVEATS: (a) addresses are the ones CURRENTLY published — a wallet rotated away in the last 30 days is missed (lower bound); (b) docs that omit payTo (facilitator-held) are unmeasurable from the doc; (c) 13 of the 55 docs were unreachable, so the population is a floor.","5. BASE CONTROL: the same 8 addresses on Base over the same window via tenderly getLogs — where the same services' money actually flows."],"headline":{"declared_in_directory":55,"live_docs_reachable":42,"still_declare_polygon_in_live_docs":17,"dir_says_polygon_but_live_doc_does_not":25,"services_publishing_no_wallet_in_doc":4,"distinct_usdc_payto_addresses_published":8,"polygon":{"token":"native USDC (0x3c49…3359 — the doc-declared contract)","tx_30d":8,"usdc_inflow_30d":28.481483,"addresses_with_any_activity":2,"active_addresses":"0xb075aa8206d6de88edeed0ee4015a1a33d3659d8 (deskcrew): polygon 1 tx / $0.0500; base control 542 tx / $25.2300 (38 senders); 0xdd350976b8cffc65938c0464d39a2c78be079bd0 (sean-claude-van-damme-s-general-store): polygon 7 tx / $28.4315; base control 195 tx / $1228.4219 (17 senders)"},"polygon_usdc_e_secondary":{"token":"bridged USDC.e (0x2791…174)","tx_30d":0,"usdc_inflow_30d":0,"note":"zero across all 8 addresses — the doc-declared (native) contract is where the flow is"},"base_control":{"token":"native USDC (0x8335…02913)","tx_30d":1549,"usdc_inflow_30d":1265.425782,"addresses_with_any_activity":6,"top_activity":"0xdd350976b8cffc65938c0464d39a2c78be079bd0 (sean-claude-van-damme-s-general-store): polygon 7 tx / $28.4315; base control 195 tx / $1228.4219 (17 senders); 0xb075aa8206d6de88edeed0ee4015a1a33d3659d8 (deskcrew): polygon 1 tx / $0.0500; base control 542 tx / $25.2300 (38 senders); 0xe61c2359f1539b15f092aadbac332cf033767aec (khotem-cryptographic-witness): polygon 0 tx / $0.0000; base control 44 tx / $7.9568 (5 senders)","reading":"the declared wallets are active on Base (multichain docs settle where buyers actually pay), not on the Polygon rail they declare"}},"vs_directory_measurement":{"directory_census_09_09":{"polygon":{"services_with_measured_volume":15,"usdc_30d":1115,"tx_30d":1540,"per_tx":"~$0.72"},"source":"x402-list.com facilitator-indexed measurement, as published in the 09-09 census article (dev.to/pennyforgehq/i-pulled-all-680-x402-services-and-counted-the-payments-solana-does-74-of-the-measured-1d4h)"},"this_measurement":{"polygon_declared_wallets":{"tx_30d":8,"usdc_inflow_30d":28.481483},"gap":"the directory's ~$1,115 of measured Polygon x402 volume vs $28.48 received by the declared wallets = ~$1086.52 (97%) that never landed in a published payTo — facilitator-held wallets (6 of the 17 live declarers publish none), multichain docs settling on Base (see base_control), and/or non-USDC paths"}},"addresses":[{"address":"0xdd350976b8cffc65938c0464d39a2c78be079bd0","published_by_services":["sean-claude-van-damme-s-general-store"],"source_scopes":["sean-claude-van-damme-s-general-store:payto-key-anywhere","sean-claude-van-damme-s-general-store:pol-route"],"polygon_native_usdc_tx_30d":7,"polygon_native_usdc_inflow_30d":28.431483,"polygon_usdc_e_tx_30d":0,"polygon_usdc_e_inflow_30d":0,"base_usdc_tx_30d":195,"base_usdc_inflow_30d":1228.421946,"base_distinct_senders":17},{"address":"0xb075aa8206d6de88edeed0ee4015a1a33d3659d8","published_by_services":["deskcrew"],"source_scopes":["deskcrew:payto-key-anywhere"],"polygon_native_usdc_tx_30d":1,"polygon_native_usdc_inflow_30d":0.05,"polygon_usdc_e_tx_30d":0,"polygon_usdc_e_inflow_30d":0,"base_usdc_tx_30d":542,"base_usdc_inflow_30d":25.23,"base_distinct_senders":38},{"address":"0xe61c2359f1539b15f092aadbac332cf033767aec","published_by_services":["khotem-cryptographic-witness"],"source_scopes":["khotem-cryptographic-witness:payto-key-anywhere","khotem-cryptographic-witness:pol-route"],"polygon_native_usdc_tx_30d":0,"polygon_native_usdc_inflow_30d":0,"polygon_usdc_e_tx_30d":0,"polygon_usdc_e_inflow_30d":0,"base_usdc_tx_30d":44,"base_usdc_inflow_30d":7.956836,"base_distinct_senders":5},{"address":"0x2583aac89f58a63d9ccbedaa5e3baf2196aa967e","published_by_services":["arch-tools"],"source_scopes":["arch-tools:payto-key-anywhere"],"polygon_native_usdc_tx_30d":0,"polygon_native_usdc_inflow_30d":0,"polygon_usdc_e_tx_30d":0,"polygon_usdc_e_inflow_30d":0,"base_usdc_tx_30d":65,"base_usdc_inflow_30d":1.765,"base_distinct_senders":12},{"address":"0xcf9223ece895258dea8d288aebcf846ab8e342fb","published_by_services":["kr-crypto-intelligence"],"source_scopes":["kr-crypto-intelligence:payto-key-anywhere"],"polygon_native_usdc_tx_30d":0,"polygon_native_usdc_inflow_30d":0,"polygon_usdc_e_tx_30d":0,"polygon_usdc_e_inflow_30d":0,"base_usdc_tx_30d":534,"base_usdc_inflow_30d":1.584,"base_distinct_senders":69},{"address":"0x38c9f689274e2fc3ae360744ef88ce212077a584","published_by_services":["japan-address-api","japan-diet-api","japan-furigana-api","japan-holiday-business-day-api","japan-transit-api","japan-weather-forecast-warnings-api"],"source_scopes":["japan-address-api:payto-key-anywhere","japan-diet-api:payto-key-anywhere","japan-furigana-api:payto-key-anywhere","japan-holiday-business-day-api:payto-key-anywhere","japan-transit-api:payto-key-anywhere","japan-weather-forecast-warnings-api:payto-key-anywhere"],"polygon_native_usdc_tx_30d":0,"polygon_native_usdc_inflow_30d":0,"polygon_usdc_e_tx_30d":0,"polygon_usdc_e_inflow_30d":0,"base_usdc_tx_30d":169,"base_usdc_inflow_30d":0.468,"base_distinct_senders":21},{"address":"0xad586c246b75982ec16c6a5efe4488222965408f","published_by_services":["x402-extract-api"],"source_scopes":["x402-extract-api:payto-key-anywhere","x402-extract-api:pol-route"],"polygon_native_usdc_tx_30d":0,"polygon_native_usdc_inflow_30d":0,"polygon_usdc_e_tx_30d":0,"polygon_usdc_e_inflow_30d":0,"base_usdc_tx_30d":0,"base_usdc_inflow_30d":0,"base_distinct_senders":0},{"address":"0xf8a376ebf123d7252cd7b66bcd77a727a4def22f","published_by_services":["saylor-innovations-watchdog-token-intelligence"],"source_scopes":["saylor-innovations-watchdog-token-intelligence:payto-key-anywhere","saylor-innovations-watchdog-token-intelligence:pol-route"],"polygon_native_usdc_tx_30d":0,"polygon_native_usdc_inflow_30d":0,"polygon_usdc_e_tx_30d":0,"polygon_usdc_e_inflow_30d":0,"base_usdc_tx_30d":0,"base_usdc_inflow_30d":0,"base_distinct_senders":0}],"services":[{"slug":"agentbit","base_url":"https://agentbit.app","dir_status":"online","live_doc_reachable":true,"live_doc_declares_polygon":true,"doc_shape":"other","polygon_routed_payto_entries":0,"declared_asset":null,"payto_addresses_published":[]},{"slug":"anchor-x402","base_url":"https://api.anchor-x402.com","dir_status":"online","live_doc_reachable":true,"live_doc_declares_polygon":true,"doc_shape":"v1","polygon_routed_payto_entries":0,"declared_asset":null,"payto_addresses_published":[]},{"slug":"arch-tools","base_url":"https://archtools.dev","dir_status":"online","live_doc_reachable":true,"live_doc_declares_polygon":true,"doc_shape":"v2","polygon_routed_payto_entries":0,"declared_asset":null,"payto_addresses_published":["0x2583aac89f58a63d9ccbedaa5e3baf2196aa967e"]},{"slug":"deskcrew","base_url":"https://deskcrew.io","dir_status":"online","live_doc_reachable":true,"live_doc_declares_polygon":true,"doc_shape":"other","polygon_routed_payto_entries":0,"declared_asset":null,"payto_addresses_published":["0xb075aa8206d6de88edeed0ee4015a1a33d3659d8"]},{"slug":"edge-agents-ai","base_url":"https://pay.edge-agents.ai","dir_status":"online","live_doc_reachable":true,"live_doc_declares_polygon":true,"doc_shape":"other","polygon_routed_payto_entries":0,"declared_asset":null,"payto_addresses_published":[]},{"slug":"japan-address-api","base_url":"https://address.agentic-jp.com","dir_status":"online","live_doc_reachable":true,"live_doc_decla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