PaywallWatch
GET https://api.paywallwatch.com/v1/ping
Listed in x402 List · Data: x402-list.com (CC BY 4.0)
Use when testing an x402 client end to end. Returns ok and the server time; costs one cent.. Use when an agent needs email validation, screening only, for an address from a form, a scrape or a CRM and must decide whether it is worth sending to. Screens the address: syntax, DNS mail exchanger, disposable domain, role account, free provider and common typos. It does not verify that the mailbox exists. A DNS failure answers 503 and is not charged.
Other endpoints from api.paywallwatch.com
The same service's other paid functions that Hagglyai tracks, each with its own price. Functions outside Hagglyai's categories are not listed.
| Endpoint | Category | Price per call |
|---|---|---|
| GET /v1/email/verify | Web page extraction | $0.003 |
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X GET 'https://api.paywallwatch.com/v1/ping'
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseEstimated calls per day
Paid calls to api.paywallwatch.com's tracked endpoints each day, estimated from the 30-day totals the x402 catalogues report. Each bar is the change in that 30-day total since the day before, plus the calls that left the 30-day window (taken as an average day). It is an estimate: Hagglyai does not measure or pay for these calls.
Usage available for 1 of 2 tracked endpoints, 12 paid calls in the last 30 days. Last updated 2 hours ago. Unknown usage is left out, not counted as zero.
Compared with other providers
api.paywallwatch.com ranks 171st of 307 in Web page extraction by its latest reported 30-day paid calls. Coverage matters: a provider whose endpoints report more of their usage can rank higher.
| # | Provider | Reported 30-day calls | Coverage |
|---|---|---|---|
| 1 | stableenrich.dev | 43,154 | 14 of 31 endpoints |
| 2 | win.oneshotagent.com | 11,974 | 14 of 27 endpoints |
| 3 | agent.pocket.network | 9,000 | 14 of 25 endpoints |
| 4 | market.datapackvibe.com | 8,788 | 5497 of 7644 endpoints |
| 5 | x402.orthogonal.com | 6,042 | 212 of 218 endpoints |
| 6 | agent402.tools | 4,350 | 152 of 237 endpoints |
| 7 | api.clawfetch.ai | 2,987 | 4 of 8 endpoints |
| 8 | api.kadec0.xyz | 2,333 | 12 of 12 endpoints |
| 171 | api.paywallwatch.com (this one) | 12 | 1 of 2 endpoints |