Horizon Pulse
x402 developer tool. Use before paying an unknown x402 endpoint, or to debug your own. GET with required url (optional method GET/POST, body JSON for POST probes). Sends one unpaid request and never pays. Returns JSON: httpStatus, isX402, x
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 140 ms
- Price
- $0.010 per call
- Paying buyers, last 30 days
- 2 (directory's own records)
- Paid calls, last 30 days
- 4
- Category
- Payments and on-ramps
- Address
- https://horizonpulse.dev/api/x402-check
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/16c7f17d0708.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).