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HALOWERK sicherwerk X.509 Certificate Purpose Evaluator
x402
HALOWERK sicherwerk X.509 Certificate Purpose Evaluator is a paid API for AI agents from sicher.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Evaluates a PEM-encoded X.509 certificate's extension constraints against OpenSSL's rules to determine which roles (TLS client/server, S/MIME signing/encryption, timestamp signing) the certificate is actually permitted to perform.
Price / call$0.001
Success—
StatusUnknown
How this service works
Reads the constraints inside a single certificate — basic constraints, key usage, extended key usage — and reports, per role, whether the certificate permits being used that way under the pinned OpenSSL build's rules. Roles covered are TLS client, TLS server, S/MIME signing and encryption, and timestamp signing. This answers the frequent confusion where a certificate is deployed for a purpose its own extensions forbid, and the failure only shows up as an opaque handshake error later.
Output
A structured report indicating, per role (TLS client, TLS server, S/MIME signing, S/MIME encryption, timestamp signing), whether the submitted certificate's extensions permit that role under the pinned OpenSSL build's evaluation rules — helping pinpoint mismatches between intended deployment and what the certificate's own constraints allow.
Example use cases
Debugging TLS handshake certificate errors
“My nginx server keeps throwing TLS handshake errors and I suspect the certificate might not have the right key usage set for server use — can you run this PEM through the OpenSSL purpose checker to see if it's actually allowed to act as a TLS server certificate?”
Pre-deployment S/MIME certificate audit
“Before I configure this certificate for S/MIME email signing and encryption in our mail client, can you verify whether its extensions actually permit both signing and encryption roles under OpenSSL's rules? Here's the PEM.”
Timestamp authority certificate validation
“I need to use this certificate for RFC 3161 timestamp signing but I'm not sure if its extended key usage allows that — can you check the certificate extensions and tell me if it's permitted for timestamp signing?”
Technical details
Endpoint
POSThttps://sicher.halowerk.com/v1/oss-openssl-x509-purpose-evaluate?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to understand exactly which operational roles an X.509 certificate's own extension constraints permit, especially when diagnosing opaque TLS handshake failures or S/MIME configuration errors caused by key usage mismatches. Prefer this over generic certificate parsers when you specifically need OpenSSL-rules-based purpose evaluation rather than raw extension display.
Side effects
- Invalid or malformed PEM input returns a parse error
- Certificate with no extensions may produce indeterminate results for some roles
- Expired certificates may still be evaluated for purpose but expiry is a separate concern
- Oversized PEM exceeding 262144 characters will be rejected
- Empty certificate_pem field returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| certificate_pem | string |
Tags
x402
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