Sponsored Content
Skip to main content
vet402
Independent MeasurementRegister: x402 endpoint observations (L0)Catalog snapshot: 2026-09-01 (14,656 of 14,656 fetched)
vet402State of x402 · MethodologyTable: L0. L1 is on each endpoint page

The x402 Observatory

This page lists live endpoint checks. Values here are measurements, not opinions.

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. This table is L0 — no purchase is attached; L1 settle-through purchases are on each endpoint's page, never mixed into these cells. pass / fail / unverified are defined measurements, not opinions — definitions here. unverified is not a failure: the catalog entry does not declare enough for a machine to check.

Find an endpoint

1.Observed endpoints

21,050 endpoints on record, ordered by observed call volume (catalog-reported, last 30 days). Page 1 of 527.

L0 observations over catalog endpoints
EndpointNetworkDeclared methodCatalogL0Last probedCalls 30d
agents.chain.link/v1/operations/:workflowNameeip155:8453POSTactiveunverified2026-08-14 08:53 UTC36,339
stableenrich.dev/api/exa/searcheip155:8453POSTactiveunverified2026-08-14 08:52 UTC23,199
agents.chain.link/v1/operations/:operationId/submiteip155:8453POSTactiveunverified2026-08-14 08:53 UTC16,089
x402.twit.sh/tweets/searcheip155:8453GETactiveunverified2026-08-14 08:52 UTC13,232
stabletravel.dev/api/seats-aero/searcheip155:8453GETactiveunverified2026-08-14 08:52 UTC6,537
enrichx402.com/api/exa/contentseip155:8453POSTactiveunverified2026-08-30 11:24 UTC4,477
stableenrich.dev/api/exa/contentseip155:8453POSTactiveunverified2026-08-14 08:52 UTC4,227
glim.sh/api/v1/twitter/searchsolana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpPOSTactiveunverified2026-08-14 08:52 UTC4,018
enrichx402.com/api/exa/searcheip155:8453POSTactiveunverified—3,848
x402.sniperx.fun/api/v1/token/activities/smarttraders_sma…solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpGETactiveunverified—3,577
api.deepnets.ai/api/token-safetysolana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpGETactiveunverified2026-08-14 08:52 UTC3,312
api.exa.ai/searcheip155:8453POSTactivepass2026-08-21 10:55 UTC3,308
x402.tavily.com/searcheip155:8453POSTactiveunverified2026-08-14 08:52 UTC2,893
x402.ottoai.services/tweet-searcheip155:8453GETactiveunverified2026-08-14 08:52 UTC2,750
stableenrich.dev/api/firecrawl/searcheip155:8453POSTactiveunverified2026-08-14 08:52 UTC2,682
kronossignals.com/api/v1/liquidations/btceip155:8453GETactivepass2026-08-14 08:52 UTC2,319
token4u.ai/v1/chat/completionseip155:8453POSTactiveunverified2026-08-14 08:53 UTC2,242
blockrun.ai/api/v1/exa/searcheip155:8453POSTactiveunverified2026-08-14 08:52 UTC2,161
blockrun.ai/api/v1/exa/contentseip155:8453POSTactiveunverified2026-08-14 08:52 UTC1,850
stableenrich.dev/api/pdl/people-enricheip155:8453POSTactiveunverified2026-08-14 08:52 UTC1,850
win.oneshotagent.com/v1/tools/enrich/profileeip155:8453POSTactiveunverified2026-08-14 08:53 UTC1,801
api.kadec0.xyz/v1/serpeip155:8453GETactiveunverified2026-08-14 08:53 UTC1,617
api.strale.io/x402/email-validatebaseGETactivepass2026-08-23 10:51 UTC1,604
stabletravel.dev/api/seats-aero/availabilityeip155:8453GETactiveunverified2026-08-14 08:52 UTC1,556
blockrun.ai/api/v1/exa/answereip155:8453POSTactiveunverified2026-08-14 08:52 UTC1,517
api.nansen.ai/api/v1/profiler/address/current-balanceeip155:8453POSTactivepass2026-08-14 08:52 UTC1,487
x402engine.app/api/crypto/priceeip155:8453GETactiveunverified2026-08-25 10:47 UTC1,419
win.oneshotagent.com/v1/tools/web-readeip155:8453POSTactiveunverified—1,403
api.loyalspark.online/x402-gateway/recipient-api/offerseip155:8453GETactiveunverified2026-08-14 08:52 UTC1,379
win.oneshotagent.com/v1/tools/verify/emaileip155:8453POSTactiveunverified2026-08-21 10:55 UTC1,364
x402.agentutility.ai/users-by-usernameeip155:8453POSTdelistedunverified2026-08-14 08:53 UTC1,272
google-trends.use.x402atlas.com/trendeip155:8453GETactivepass2026-08-14 08:52 UTC1,246
api.onesource.io/api/chain/block-numbereip155:8453GETactiveunverified2026-08-14 08:52 UTC1,184
stable-people-data-git-pdl-signoz-usage-alarms-merit-syst…eip155:8453POSTdelistedunverified2026-08-30 11:24 UTC1,139
api.onesource.io/api/chain/erc20-balanceeip155:8453GETactiveunverified2026-08-14 08:52 UTC1,095
api.onesource.io/api/chain/ens/:inputeip155:8453GETactiveunverified2026-08-14 08:52 UTC1,077
api.onesource.io/api/chain/tx/:hasheip155:8453GETactiveunverified2026-08-14 08:52 UTC972
api.onesource.io/api/chain/live-balanceeip155:8453GETactiveunverified2026-08-14 08:52 UTC963
x402.sniperx.fun/api/v1/token/activities/smarttraders_kolsolana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpGETactiveunverified—898
x402.sniperx.fun/api/v1/token/activities/smarttraders_whalesolana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpGETactiveunverified—892

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.

Verify a payeeGet an API key