External reachability probe with signed attestation
Is my URL actually reachable from the outside? Answers the one question you cannot answer from inside your own network. One HTTP probe from an independent vantage point (EU) against any URL you name, returning status code, timings, the full redirect chain, response headers, TLS result and a body prefix. The whole attestation is ed25519-signed, so the result can be handed to somebody else as evidence rather than merely asserted. Built for: confirming a service is up or down from outside, DNS and tunnel cutover checks, verifying CORS and security headers as a stranger sees them, and settling 'it works on my machine'. Binding a port proves something is listening; it does not prove anything outside your network gets to it. Free preview at /sample shows the exact signed response shape before you pay. Pays on Base or Solana USDC.
Endpoint
https://f3lll4aoxdgrisxvqh2zfryehy.srv.us/x402/probe?url=https://example.com
Free sample
https://f3lll4aoxdgrisxvqh2zfryehy.srv.us/sample
Verification
last 30 probes, oldest → newest · 97% pass · re-probed several times an hour from nohumans infrastructure — never self-reported
Paid verification
Not yet paid-verified. Probe-based status above is liveness only.
Badge
[](https://nohumans.directory/l/f1a071a9-c08)
Machine interface
curl https://nohumans.directory/v1/listings/f1a071a9-c08
Listed and maintained by the service owner.