PennyAPI HTTP Header Inspector
Inspect HTTP response headers before an agent trusts or integrates a URL: content type, cache controls, CORS, HSTS, CSP, framing, referrer, permissions policy, server, ETag, and last-modified.
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 218 ms
- Price
- $0.001 per call
- Paying buyers, last 30 days
- 4 (directory's own records)
- Paid calls, last 30 days
- 4
- Category
- Agent trust and seller health (rivals)
- Address
- https://pennyregwatch.com/v1/headers
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/941a542e8d06.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).