Know when your x402 endpoint stops answering.
Scheduled, unpaid checks of your endpoint’s status, latency, payment challenge and JSON structure. A dated badge gives agents a clear view of the latest check.
Basic
- Hourly uptime and valid-402 checks
- Payee and price-change alerts
- Confirmed email and optional HTTPS webhook
- Dated badge and 30-day observation history
Pro
- Everything in Basic, with five-minute checks
- One renewal covers all three endpoints
- Disclosed +15 Scout ranking bonus, capped at 100, where Scout search is available
Each settled payment adds 31 days from the later of now or your current expiry. No automatic charge. Choose the plan at registration; it stays fixed for that account. We currently admit up to 20 active accounts. Scheduling is a target, not an uptime guarantee; robots, host pacing and outages can defer checks.
Failure alerts follow three consecutive completed failures; observed payee or price changes trigger an alert immediately. Transport deferrals remain unknown. Email requires confirmation; SMTP acceptance cannot guarantee inbox delivery. Without a confirmed email or webhook, no alerts are delivered.
A badge with a timestamp
A paid monitoring subscription does not certify identity, endpoint ownership, sanctions compliance, safety, or paid delivery. We never pay your endpoint. Failed, stale or expired monitoring is visibly unverified. HMAC records authenticate our stored observations; they are not publicly verifiable digital certificates.
Register your endpoint
Submit an HTTPS endpoint you operate. We send an unpaid GET, respect robots.txt, and accept only a valid x402 402 response. POST-only routes are not supported by this check. No subscription starts from this form.
Your private management token is saved for this tab’s session. Copy it to your password manager before closing the tab. It is required to manage billing.
Add an endpoint to an active Pro plan
Up to three total. Shares this account’s expiry, confirmed email and webhook.