https://2s.io/api/tls/cert-info
Open a live TLS connection to a host and return its certificate. Give a host (and optional port, default 443). Returns the negotiated TLS protocol + cipher, whether the chain validates against system roots, and the leaf certificate's subject + issuer (CN/O/C), validity window (valid-from / valid-to), days until expiry + expired flag, serial number, SHA-256 fingerprint, Subject Alternative Names, and the chain length. A genuine network probe agents can't do from their sandbox — for cert-expiry monitoring, TLS audits, and verifying who issued a site's certificate. SSRF-guarded: the host must resolve to a public address. Self-signed and expired certs are reported (not rejected).
Start with a quote-only recipe. Payment signing stays in your project.
const response = await fetch("https://2s.io/api/tls/cert-info", {
method: "GET",
});
console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));
// A valid 402 is a quote, not a completed paid call.This sends no payment. Inspect the 402 response before adding a wallet-enabled client.
- Live 402 quote confirmed
GET returned a protocol-valid 402 quote (402). No payment was made.
- Origin reachable
HEAD https://2s.io/ returned 200.
- Observed in cdp-bazaar
The registry record was observed and retained with provenance.
- Observed in 402-index
Discovered through bazaar.
- Registry record checked
Registry health: healthy.
EVIDENCE
Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call.