SpendPreflightRegister an endpoint ↗
Basic endpoint monitoring

Know the day Coinbase delists your endpoint.

Daily listing watch and hourly endpoint checks. Email when we observe a confirmed removal or new risk. Best effort; checks and delivery can be delayed.

Start 14 days free →

Alerts use the day we observe a change; the actual removal time may be unknown.

USDC on Base · Manual renewal

Basic

$9 / 31 days · one endpoint
  • Bazaar delisting alerts and newly at-risk metadata alerts from a daily Listing Guard run
  • 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

$19 / 31 days · up to three endpoints
  • 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.

A Delisted alert requires a previously observed active Bazaar listing and a later explicit inactive CDP result. Missing Scout rows, unknown index status and failed checks do not prove removal. At risk means the heuristic score newly reaches 60/100; it is not Coinbase policy certification. Daily checks may be deferred. 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

Verified by SpendPreflightlast check 2026-10-09 22:00 UTC · example only

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.

Endpoint + email

Start your free monitoring

Prefer a score first? Check your listing free.

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. Basic registration requests the founding offer. If a place is available, monitoring starts for 14 days free. If the offer is full or already claimed, this form creates a free registration only; no payment is taken.

We send one confirmation email after the unpaid check. Open it and click Confirm email alerts. Free-period alerts go only to your confirmed email. No wallet or ownership proof.

Other monitoring plans

Pro creates a registration without an active period. Payment is a separate manual step.

We store your endpoint and email to run monitoring. Probe bodies are discarded; history expires after 30 days. Privacy details.

Manage an existing registration