x402 API outages: week 45, 2026

98.4% of 2,678 daily checks were up across 395 x402 APIs (Nov 2 to Nov 8, 2026, UTC days). 96.3% of those checks returned a valid x402 payment request.

APIs with at least one failed check: 14
Down 2+ days in a row: 9 (Trust, Security & Verification 4; Crypto & Onchain Data 3; Business, Company & Lead Data 1; not yet categorized 1)
Failed every check this week: 3
Had a failed check during the week and were up at our latest check: 8
Down right now (2+ failed checks in a row, as of Nov 9, 2026, 5:24 AM ET): 5, by cause: server error (HTTP 5xx) 2, no answer within 8 s 2, endpoint not found (HTTP 410) 1
Failed one check, not yet counted as down: 1

Daily share up (all checked APIs, each day’s latest check): Nov 2 98.1%, Nov 3 98.1%, Nov 4 98.1%, Nov 5 97.9%, Nov 6 98.5%, Nov 7 98%, Nov 8 98.2%.

Common failure types: our daily history records only up/down and valid/invalid per day, not the cause, so causes are taken from the latest check. Among APIs without a valid x402 payment request at the latest check, the most common causes were requests that asked for other auth (HTTP 401/403, 3) and rejected unpaid requests (HTTP 400, 3), followed by endpoint not found (2) and server errors (HTTP 5xx, 2).

How we measure

One unpaid request per API per day to its example endpoint, 8 s timeout, never paid. Up means an HTTP answer below 500 that is not 404 or 410. Each day counts its latest check; days without a check are skipped. An API counts as down only after 2 or more failed checks in a row. Left out: 0 listings whose check we are updating on our side, and 1 where our checker gets a TLS error (HTTP 525), which is our problem, not the service’s. Including them, 98.1% of 2,685 checks across 396 APIs were up and 96.1% returned a valid x402 payment request. Data as of Nov 9, 2026, 9:15 AM ET.

These counts cover x402 APIs listed on YourAITools, not every x402 endpoint. Live status: x402 APIs down right now. Monthly report: State of x402: November 2026. Follow outages as they happen: RSS or JSON Feed. Data license CC BY 4.0, see our open dataset.