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TLS Self-Signed Certificate Checker
x402
TLS Self-Signed Certificate Checker is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-29).
Checks whether a TLS endpoint's port-443 certificate issuer DN equals its subject DN, indicating a self-signed certificate
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs whether the port-443 issuer DN equals the subject DN. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/tls-self-signed first.
Output
A boolean or structured result indicating whether the certificate's issuer DN equals its subject DN (confirming self-signed status), along with relevant certificate details such as the issuer DN and subject DN values extracted from the port-443 TLS handshake.
Example use cases
Security audit for internal services
“Check whether our internal API server at internal.mycompany.com is using a self-signed TLS certificate — I need to know if the issuer DN equals the subject DN.”
Pre-deployment TLS validation
“Before we go live, verify that https://staging.myapp.io is not presenting a self-signed cert — I want to confirm the issuer and subject DNs are different.”
Vendor certificate compliance check
“I need to verify if the TLS certificate on our vendor's endpoint at partner.vendor-service.com is self-signed so I can flag it in our compliance report.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/tls-self-signed?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, programmatic check of whether a TLS certificate is self-signed (issuer DN == subject DN) without relying on an LLM or manual inspection. Prefer the unpaid sandbox endpoint at POST /v1/sandbox/tls-self-signed for testing; use this paid endpoint for production verification where reliability and a guaranteed response are needed.
Side effects
- Host unreachable or connection timeout on port 443
- Invalid URL or hostname format
- Host does not support TLS on port 443
- Certificate parsing failure
- DNS resolution failure for provided hostname
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Public URL whose hostname is inspected. Provide url or host. Private targets are rejected. |
| host | string | Public hostname such as example.com. The port and check are fixed by the SKU. Provide host or url. |
Tags
x402
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