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Forest TLS Certificate Change Detector
x402
Forest TLS Certificate Change Detector is a paid API for AI agents from http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-29).
Detects material changes in a public TLS certificate (fingerprint, issuer, SANs, validity window) by comparing a deterministic hash against a previously stored hash.
Price / call$0.001
Success—
StatusUnknown
How this service works
Detect material public certificate changes in fingerprint, issuer, SANs or validity window using a deterministic hash. Handshake timing noise is ignored. Base mainnet USDC
Output
Returns a JSON object indicating whether the certificate changed (boolean or null if no previous hash), the new deterministic hash, the previous hash, a list of changed fields (e.g. fingerprint, issuer, SANs, validity window), the current certificate fingerprint, and the not_after expiry timestamp. Also includes metadata such as provider, checked_at timestamp, and cache info.
Example use cases
Unexpected certificate replacement alert
“Has the TLS certificate on payments.mycompany.com changed since yesterday's check? The previous hash was d3f4a1b2c9e8. If anything changed in the fingerprint, issuer, or validity dates, I need to know immediately.”
Routine cert rotation confirmation
“We just renewed the SSL cert for api.mybusiness.com — can you verify the certificate actually changed by comparing the current cert against this old hash: 7e3c9a1f0b2d?”
Third-party vendor cert monitoring
“Check if the TLS certificate on vendor-portal.thirdparty.io has changed since my last scan with hash 5f9c2e8a3d1b — I want to know if the issuer, SANs, or expiry window are any different.”
Technical details
Endpoint
POSThttps://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/tls/changed?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, deterministic signal of whether a TLS certificate has materially changed — ideal for polling in monitoring workflows where handshake timing noise would produce false positives. Prefer this over a full TLS inspection endpoint when you already have a baseline hash and only need a change/no-change answer. Best for automated certificate rotation detection, security alerting pipelines, or third-party vendor cert monitoring.
Side effects
- Invalid hostname format (fails pattern validation)
- Host is unreachable or DNS does not resolve
- TLS handshake fails (e.g. self-signed, expired cert blocking connection)
- previous_hash not provided — changed field returns null rather than a boolean
- Timeout during TLS probe
- Non-public or internal hostnames rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| host | string | Public DNS hostname to resolve. |
| port | — | TLS port to probe; only the public TLS endpoint is supported. |
| previous_hash | string | Earlier result hash used to detect a material change. |
Tags
x402
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