{"title":"The x402 Polygon rail, measured from the declared payTo addresses (2026-09-25 remeasure)","what":"Independent 30-day measurement of USDC inflow to every payTo address published in the live x402 discovery docs of the services in the canonical x402 directory (x402-list.com) that still declare eip155:137 (Polygon) in their live docs — on Polygon PoS and on Base as control. Replaces the 09-11 anchor in place; the 09-11 numbers (window 08-12..09-11) are preserved in superseded_0911_anchor. Same declared-payTo method as /solana-rail and /rails: a lower bound — rotated-away payTo is missed, v2 docs may omit payTo by design.","generated_at":"2026-09-26T01:00:16Z","window":"30 days: 2026-08-26T07:59:29Z -> 2026-09-25T07:59:29Z (Polygon PoS; head block 94412019, start block 49412018; completed clean at the 09-25 07:5xZ pull, carried into the 09-25 remeasure). Base control column: 2026-08-26T16:45:33Z -> 2026-09-25T16:45:33Z (the base rail measurement of the same cycle — window edges differ by ~9h, documented in /rails).","sources":{"directory":"x402-list.com/api/v1/services (810 services, stageA pull as_of 2026-09-25T07:50:21Z — the same stageA checkpoint as /rails and /solana-rail)","discovery_docs":"live GET /.well-known/x402 for all 810 services (551 parseable, 259 offline/degraded), 2026-09-25 07:50:21Z; 6 services still declare eip155:137 in the live doc","polygon_chain":"Polygon PoS (chain 137) PRIMARY token: native Circle USDC 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 — USDC Transfer logs (topic to = declared payTo) over the 30-day range (head 94412019, start 49412018), 0 RPC errors, 0 incomplete rows; completed clean at the 2026-09-25 07:59Z pull (carried from the run-106 checkpoint)","base_chain":"Base (chain 8453) USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — base.blockscout.com API v2 token-transfers, window 2026-08-26T16:45:33Z..2026-09-25T16:45:33Z (the /rails base rail measurement)"},"method":["1. stageA (2026-09-25T07:50:21Z): pull the full directory (810 rows) and GET the live .well-known/x402 of every service (551 parseable); parse declared networks + every payTo across all observed doc shapes.","2. 6 services still declare eip155:137 in the live doc; their docs publish 6 distinct payTo addresses. All 6 are ALSO base-declared (cross-checked against the base rail population).","3. Per address: count 30-day native-USDC Transfer inflows on Polygon PoS over the 30-day range (0 RPC errors, 0 incomplete rows).","4. BASE CONTROL: the same 6 addresses on Base over the base rail window, via Blockscout API v2 token-transfers.","5. CAVEATS unchanged: (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 are unmeasurable from the doc; (c) 259 of 810 docs were offline/degraded, so the population is a floor; (d) native USDC primary — the bridged USDC.e contract (0x2791…174) was NOT re-scanned in this cycle (see polygon_usdc_e_secondary)."],"headline":{"directory_pull_as_of":"2026-09-25T07:50:21Z","declared_in_directory":810,"live_docs_reachable":551,"still_declare_polygon_in_live_docs":6,"distinct_usdc_payto_addresses_published":6,"all_addresses_also_base_declared":true,"polygon":{"token":"native USDC (0x3c49…c3359 — the doc-declared contract)","tx_30d":12,"usdc_inflow_30d":71.181729,"addresses_with_any_activity":2,"active_addresses":"0xa844554e3429c85de29dcc644bfe98d83a7d777f (selfagent-bounty-radar): 4 tx / $42.7492 / 4 senders; 0xdd350976b8cffc65938c0464d39a2c78be079bd0 (sean-claude-van-damme-s-general-store): 8 tx / $28.4325 / 3 senders"},"polygon_usdc_e_secondary":{"token":"bridged USDC.e (0x2791…174)","tx_30d":0,"usdc_inflow_30d":0,"note":"the USDC.e contract was not independently re-scanned in the 09-25 cycle (native contract only); 09-11 finding stands for that window (3 tx / $6.51, all 0xdd350976); in the new window the native contract received 12 tx / $71.18 and the USDC.e contract was unchanged."},"base_control":{"token":"native USDC (0x8335…02913)","tx_30d":413,"usdc_inflow_30d":1151.727706,"addresses_with_activity":5,"top_wallet":"0xdd350976b8cffc65938c0464d39a2c78be079bd0 (sean-claude-van-damme-s-general-store): 337 tx / $1148.823706 / 22 senders"},"split_note":"71.18 USDC landed on Polygon vs 1151.73 on Base for the SAME 6 wallets — 5.8% of this window's settlement volume went on-chain on the declared rail."},"per_address":[{"address":"0xa6c1c305d7e11ae7eeb80ddb179e8a51a0a2e32a","published_by":["marz-greta-lock-network-ai-text-human-likeness-benchmark"],"polygon_30d":{"tx":0,"usdc":0,"distinct_senders":0},"base_30d":{"tx":7,"usdc":0.4,"distinct_senders":2},"also_base_declared":true},{"address":"0xa844554e3429c85de29dcc644bfe98d83a7d777f","published_by":["selfagent-bounty-radar"],"polygon_30d":{"tx":4,"usdc":42.749246,"distinct_senders":4},"base_30d":{"tx":1,"usdc":0.05,"distinct_senders":1},"also_base_declared":true},{"address":"0xad586c246b75982ec16c6a5efe4488222965408f","published_by":["x402-extract-api"],"polygon_30d":{"tx":0,"usdc":0,"distinct_senders":0},"base_30d":{"tx":2,"usdc":0.004,"distinct_senders":1},"also_base_declared":true},{"address":"0xdd350976b8cffc65938c0464d39a2c78be079bd0","published_by":["sean-claude-van-damme-s-general-store"],"polygon_30d":{"tx":8,"usdc":28.432483,"distinct_senders":3},"base_30d":{"tx":337,"usdc":1148.823706,"distinct_senders":22},"also_base_declared":true},{"address":"0xe61c2359f1539b15f092aadbac332cf033767aec","published_by":["khotem-cryptographic-witness"],"polygon_30d":{"tx":0,"usdc":0,"distinct_senders":0},"base_30d":{"tx":66,"usdc":2.45,"distinct_senders":6},"also_base_declared":true},{"address":"0xf8a376ebf123d7252cd7b66bcd77a727a4def22f","published_by":["saylor-innovations-watchdog-token-intelligence"],"polygon_30d":{"tx":0,"usdc":0,"distinct_senders":0},"base_30d":{"tx":0,"usdc":0,"distinct_senders":0},"also_base_declared":true}],"superseded_0911_anchor":{"note":"the 09-11 anchor, superseded in place by the 09-25 remeasure; figures are for the 08-12..09-11 window only (directory pull 685 services, 55 declaring).","title":"The x402 Polygon rail, measured from the declared payTo addresses (2026-09-11)","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)","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 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