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vet402
Independent MeasurementRegister: x402 endpoint observations (L0)Catalog snapshot: 2026-08-15 (15,073 of 15,073 fetched)
vet402MethodologyNo purchases attached · facts only

The x402 Observatory

Abstract

Every endpoint in the public x402 discovery catalog, observed daily: is it still listed, and does its payment wall answer a valid 402 challenge when approached with the method it declares. No purchase is ever attached; the challenge itself is the observable. pass / fail / unverified are defined measurements, not opinions — definitions here. unverified is not a failure: it means the catalog entry does not declare enough for a machine to check.

1.Observed endpoints

15,753 endpoints on record, ordered by observed call volume (catalog-reported, last 30 days). Page 4 of 158.

L0 observations over catalog endpoints
EndpointNetworkDeclared methodCatalogL0Last probedCalls 30d
api.myceliasignal.com/oracle/price/eth/usdeip155:8453GETactiveunverified—90
api.myceliasignal.com/oracle/volatility/btc/usdeip155:8453GETactiveunverified—90
api.strale.io/x402/serp-analyzebaseGETactiveunverified—90
x402.shizu.me/cryptoeip155:8453GETactiveunverified2026-08-14 08:53 UTC90
api.myceliasignal.com/oracle/sentiment/btc/usdeip155:8453GETactiveunverified—89
weather.payapi.market/currenteip155:8453POSTactivepass2026-08-14 08:52 UTC89
2s.io/api/medical/icd10eip155:8453GETactiveunverified2026-08-14 08:52 UTC87
api.myceliasignal.com/oracle/volatility/eth/usdeip155:8453GETactiveunverified—87
api.x402node.dev/ecom/searcheip155:8453GETactiveunverified—86
polynews.news/api/v1/market-contexteip155:8453POSTactiveunverified—86
2s.io/api/business/leieip155:8453GETactiveunverified2026-08-14 08:52 UTC85
agent402.tools/api/skill/company-dossiereip155:8453POSTactiveunverified2026-08-14 08:53 UTC85
vape-x402.vapex402.workers.dev/scan/token_safety_checkeip155:8453GETactiveunverified2026-08-14 08:53 UTC85
api.loyalspark.online/x402-gateway/merchant-profileeip155:8453POSTactiveunverified2026-08-14 08:52 UTC84
api.nansen.ai/api/v1/profiler/address/related-walletseip155:8453POSTactivepass2026-08-14 08:53 UTC84
skim402.com/api/v1/readbasePOSTactiveunverified—83
x402.glassnode.com/v1/metrics/market/mvrveip155:8453GETactiveunverified2026-08-14 08:52 UTC83
x402.twit.sh/tweets/mediaUploadeip155:8453POSTactiveunverified2026-08-14 08:53 UTC83
anthropic.x402.stage.paywithlocus.com/anthropic/chateip155:8453POSTactiveunverified2026-08-14 08:53 UTC82
2s.io/api/gov/osha-violationseip155:8453GETactivepass2026-08-14 08:52 UTC81
x402.ottoai.services/tradfi-dataeip155:8453GETactiveunverified2026-08-14 08:52 UTC81
2s.io/api/law/usc-sectioneip155:8453GETactiveunverified2026-08-14 08:52 UTC80
2s.io/api/inflation/calculatoreip155:8453GETactivepass2026-08-14 08:52 UTC79
agent402.tools/api/searcheip155:8453GETactiveunverified2026-08-14 08:52 UTC79
dripstack.xyz/api/v1/publications/:publicationSlug/:postSlugeip155:8453GETactiveunverified2026-08-14 08:52 UTC79
google-trends.use.x402atlas.com/interest-by-regioneip155:8453GETactivepass2026-08-14 08:52 UTC79
agent402.tools/api/rendereip155:8453POSTactiveunverified2026-08-14 08:53 UTC78
x402.shizu.me/randeip155:8453GETactiveunverified2026-08-14 08:53 UTC78
kronossignals.com/api/v1/price/btceip155:8453GETactivepass2026-08-14 08:52 UTC76
api.apify.com/v2/acts/:actorId/run-sync-get-dataset-itemseip155:8453POSTactiveunverified—75
x402.ottoai.services/base-seasoneip155:8453GETactiveunverified2026-08-14 08:52 UTC75
polynews.news/api/v1/arbitrageeip155:8453GETactivepass2026-08-14 08:53 UTC74
vape-x402.vapex402.workers.dev/scan/liquidity_checkeip155:8453GETactiveunverified2026-08-14 08:53 UTC74
api.delx.ai/api/v1/x402/speecheip155:8453POSTactiveunverified2026-08-14 08:53 UTC73
glim.sh/api/v1/reddit/searchsolana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpPOSTactiveunverified2026-08-14 08:52 UTC73
aeml-x402.zeabur.app/pay/tier3eip155:8453GETactiveunverified—71
agent402.tools/api/llmeip155:8453POSTactiveunverified2026-08-14 08:53 UTC71
kronossignals.com/api/v1/funding-extremeseip155:8453GETactivepass2026-08-14 08:52 UTC71
2s.io/api/business/naicseip155:8453GETactivepass2026-08-14 08:52 UTC70
api.loyalspark.online/x402-gateway/rewardseip155:8453GETactiveunverified2026-08-14 08:52 UTC70
api.nansen.ai/api/v1/prediction-market/market-screenereip155:8453POSTactiveunverified2026-08-14 08:53 UTC70
ozmium.org/v1/loan/marketseip155:8453GETactiveunverified2026-08-14 08:53 UTC70
readx.sh/api/search/tweetseip155:8453GETactiveunverified2026-08-14 08:52 UTC70
vape-x402.vapex402.workers.dev/scan/exploit_checkeip155:8453GETactiveunverified2026-08-14 08:53 UTC70
x402.openwebninja.com/local-business-data/searcheip155:8453GETactiveunverified—70
2s.io/api/law/cfr-sectioneip155:8453GETactiveunverified2026-08-14 08:52 UTC69
x402.ottoai.services/defi-analyticseip155:8453GETactiveunverified2026-08-14 08:52 UTC69
token.lonestaroracle.xyz/reporteip155:8453GETactiveunverified2026-08-14 08:52 UTC68
x402factory.ai/base/coinpricebasePOSTactivepass2026-08-14 08:52 UTC68
agent402.tools/api/route/executeeip155:8453POSTactiveunverified2026-08-14 08:53 UTC67
agents.ai-rook.com/api/gas-trackereip155:8453GETactiveunverified2026-08-14 08:53 UTC67
api.loyalspark.online/x402-gateway/offerseip155:8453GETactiveunverified2026-08-14 08:52 UTC67
agent402.tools/api/skill/financial-analysiseip155:8453POSTactiveunverified2026-08-14 08:53 UTC66
agent402.tools/v1/auto/chat/completionseip155:8453POSTactiveunverified2026-08-14 08:53 UTC66
agent402.tools/v1/chat/completionseip155:8453POSTactiveunverified2026-08-14 08:53 UTC65
stableenrich.dev/api/google-maps/nearby-search/partialeip155:8453POSTactiveunverified2026-08-14 08:53 UTC65
vape-x402.vapex402.workers.dev/data/protocoleip155:8453GETactiveunverified2026-08-14 08:53 UTC65
vape-x402.vapex402.workers.dev/data/protocol_feeseip155:8453GETactiveunverified2026-08-14 08:53 UTC65
vape-x402.vapex402.workers.dev/data/treasuryeip155:8453GETactiveunverified2026-08-14 08:53 UTC65
vibesprings.net/api/price/btc-usdeip155:8453GETactiveunverified2026-08-14 08:52 UTC65
x402.glassnode.com/v1/metrics/indicators/sopreip155:8453GETactiveunverified2026-08-14 08:53 UTC65
agent402.tools/v1/embeddingseip155:8453POSTactiveunverified2026-08-14 08:53 UTC64
api.cueframe.ai/v1/media/importeip155:8453POSTactivepass2026-08-14 08:52 UTC64
mcp.deep3.ai/tools/wave-1eip155:8453POSTactiveunverified2026-08-14 08:52 UTC64
store.agentexchange.work/crypto/priceseip155:8453GETactiveunverified2026-08-14 08:52 UTC64
blockrun.ai/api/v1/pm/markets/searcheip155:8453GETactiveunverified2026-08-14 08:52 UTC63
x402.ottoai.services/generate-memeeip155:8453POSTactiveunverified2026-08-14 08:53 UTC63
agent402.tools/api/edgar-company-lookupeip155:8453GETactiveunverified2026-08-14 08:53 UTC62
agent402.tools/api/vin-decodeeip155:8453GETactiveunverified2026-08-14 08:53 UTC62
api.apify.com/v2/acts/:actorId/runseip155:8453POSTactiveunverified—62
agent402.tools/api/crypto-priceeip155:8453GETactiveunverified2026-08-14 08:53 UTC61
agent402.tools/api/options-chaineip155:8453GETactiveunverified2026-08-14 08:53 UTC61
agent402.tools/api/skill/decode-blobeip155:8453POSTactiveunverified—61
agent402.tools/api/treasury-yield-curveeip155:8453GETactiveunverified2026-08-14 08:53 UTC61
api.loyalspark.online/x402-gateway/programseip155:8453GETactiveunverified2026-08-14 08:52 UTC61
hirescrape.com/api/tools/tiktokeip155:8453POSTactiveunverified2026-08-14 08:53 UTC61
ozmium.org/v1/priceseip155:8453GETactiveunverified—61
vibesprings.net/api/price/base-gaseip155:8453GETactiveunverified2026-08-14 08:52 UTC61
x402.glassnode.com/v1/metrics/indicators/net_unrealized_p…eip155:8453GETactiveunverified2026-08-14 08:53 UTC61
agent402.tools/api/answereip155:8453GETactiveunverified2026-08-14 08:53 UTC60
agent402.tools/api/gas-snapshoteip155:8453POSTactiveunverified2026-08-14 08:53 UTC60
agent402.tools/api/geo-lookupeip155:8453GETactiveunverified2026-08-14 08:53 UTC60
agent402.tools/api/my-usageeip155:8453POSTactiveunverified2026-08-14 08:53 UTC60
agent402.tools/api/price-pytheip155:8453POSTactiveunverified2026-08-14 08:53 UTC60
api.apify.com/v2/actors/:actorId/run-sync-get-dataset-itemseip155:8453POSTactiveunverified—60
api.apify.com/v2/acts/:actorId/run-synceip155:8453POSTactiveunverified—60
keyronne.com/api/chain-txeip155:8453POSTactivepass2026-08-14 08:52 UTC60
stablesocial.dev/api/sc/youtube/channel-videoseip155:8453POSTactiveunverified—60
x402.glassnode.com/v1/metrics/market/mvrv_less_155eip155:8453GETactiveunverified2026-08-14 08:53 UTC60
x402.openwebninja.com/job-salary-data/company-job-salaryeip155:8453GETactiveunverified—60
agent402.tools/api/multi-searcheip155:8453POSTactiveunverified2026-08-14 08:53 UTC59
agent402.tools/api/skill/crypto-dossiereip155:8453POSTactiveunverified2026-08-14 08:53 UTC59
agent402.tools/api/skill/domain-inteleip155:8453POSTactiveunverified2026-08-14 08:53 UTC59
agent402.tools/api/skill/market-briefeip155:8453POSTactiveunverified2026-08-14 08:53 UTC59
agent402.tools/v1/images/generationseip155:8453POSTactiveunverified2026-08-14 08:53 UTC59
api.terradeed.co.uk/scrapeeip155:8453POSTactiveunverified—59
furigana.agentic-jp.com/furiganaeip155:8453POSTactiveunverified2026-08-14 08:53 UTC59
agent402.tools/api/company-financialseip155:8453GETactiveunverified2026-08-14 08:53 UTC58
agentpay.tools/tools/verified_route/calleip155:8453POSTactiveunverified2026-08-14 08:52 UTC58
api.nansen.ai/api/v1/profiler/address/historical-balanceseip155:8453POSTactiveunverified2026-08-14 08:52 UTC58

2.Reading this table

Catalog is presence in the public discovery catalog: active means listed as of the latest snapshot; delisted means the entry was present on an earlier day and absent on a complete fetch — with the before/after recorded on the endpoint's page. L0 is the payment-wall measurement: pass — a probe using the declared method received HTTP 402 with a parseable accepts array consistent with the catalog declaration; fail — two or more consecutive probes contradicted that (each with a recorded reason); unverified — not enough declared to measure, or the evidence threshold is not yet met. A day on which our own fetch was incomplete produces no delisting judgements at all.