PaywallWatch

paywallwatch.com

Email address screening for agents and CRMs: syntax, MX records, disposable domains, role accounts and typo hints. Screening only; it does not confirm the mailbox exists.

Visit PaywallWatch

Crypto payment details

Payment protocol: x402
Networks: Base, Solana
Tokens: USDC
Price per call (our 402 probe): $0.003 per call (check the provider for current pricing)
Example paid endpoint: https://api.paywallwatch.com/v1/email/verify
Also listed on: Agentic.Market, public listing
Category: Business, Company & Lead Data · compare business, company & lead data
More tools on: Base, Solana
Related guides: How to pay for an API with USDC via x402 (step by step) · x402 vs API keys for AI agents: which should your agent use? · x402 API prices per call, by category

Public statsmeasured by YourAITools

Measuring since Oct 28, 2026: 13 daily checks so far, so these numbers are still thin.

Status at last check: Up; Answered below HTTP 500
Measuring since: Oct 28, 2026
Last check: Nov 9, 2026, 11:30 AM ET
HTTP status: 402
Valid x402 payment terms: Yes
x402 version: v2
Response time: 613 ms; Time to response headers
Listed price: $0.003
Price seen in the 402: $0.003 on Base; Inside the listed price range
Uptime, last 7 days: 100%; 7 of 7 daily checks up · valid x402 100%
Uptime, last 30 days: 100%; 13 of 13 daily checks up · valid x402 100%

Trust score97/100Strong

From 13 daily checks since Oct 28, 2026, last 30 days. Formula 1.0-median30.

Uptime, last 30 days: 100%40 / 40 pts
Valid x402 payment request: 100%40 / 40 pts
Price matches the listing: Yes10 / 10 pts
Median response time (up checks): 606 ms7 / 10 pts

How the score works: uptime (40 points), how often the endpoint returned a valid x402 payment request (40), whether the price in it matches the listed price (10) and median response time of the up checks (10: under 500 ms 10, 500–999 ms 7, 1–2 s 4, slower 1, 0 if the last check was not up). Parts that can’t apply are left out and the score is rescaled. Strong is 90–100, fair 70–89, weak under 70. Paying for Featured, Sponsored or any placement never changes it, and it is not an endorsement. Think it’s wrong? Email hello@youraitools.co and we’ll re-check it.

How we measure: one unpaid check per day of the listing’s example endpoint (GET https://api.paywallwatch.com/v1/email/verify). We never pay and never send a payment header. Up means any answer below HTTP 500 except 404/410 within 8 seconds. Uptime counts those daily checks. Payment never changes these numbers. A technical check, not an endorsement. Raw JSON · schema

How we verified it

Unpaid GET /v1/email/verify returned HTTP 402 on 2026-10-28 with x402 payment terms: x402 v2, exact, 0.003 USDC on Base or Solana. Price checked via our 402 probe on 2026-10-28 (1 route probed; other routes may be priced differently). Official site fetched (HTTP 200) on 2026-10-28. Shown on the public Agentic.Market site. Last checked 2026-10-28.

The description summarizes the provider's own site. YourAITools is not affiliated with PaywallWatch. Listing a tool is not an endorsement: check pricing and terms with the provider before paying.

Some links are affiliate links; we may earn a commission at no cost to you. It never affects listings or order. How we make money

Is this your tool? Update the listing for free, or get it Featured for 30 days ($29, card or USDC): a badge and a labeled slot at the top of its category. Check your x402 endpoint free.

Own PaywallWatch? Add a “Listed on YourAITools” badge

Free, optional, no tracking. Paste one of these into your site or README:

<a href="https://youraitools.co/tool/paywallwatch"><img src="https://youraitools.co/badge/listed.svg" alt="Listed on YourAITools" width="168" height="20"></a>

[![Listed on YourAITools](https://youraitools.co/badge/listed.svg)](https://youraitools.co/tool/paywallwatch)

Accepts crypto? Use the “Pays in crypto” badge instead.

Building or using tools like this? Discuss them in the YourAITools Community.

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