# agentshelf.syntexa.ch TLS Expiry 90-Day Check

> agentshelf.syntexa.ch TLS Expiry 90-Day Check is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-02).

Checks whether a host's port-443 TLS certificate will remain valid for at least 90 days and returns an ok_check boolean result

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/tls-expiry-90?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-syntexa-ch-tls-expiry-90-day-check-b0e3ad9a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EbleIp884MEpSFYmNDMpG

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agentshelf-syntexa-ch-tls-expiry-90-day-check-b0e3ad9a -d '<json body>'
```

Example prompt: Can you check whether the TLS certificate on api.example.com is still valid for at least 90 days?

## When to prefer this

Choose this endpoint when you need a fast, deterministic pass/fail check on whether a specific host's TLS certificate meets a 90-day minimum validity window — for example, in pre-deployment gates, vendor audits, or automated monitoring pipelines. Prefer it over general certificate inspection tools when you specifically need a binary ok_check outcome for the 90-day threshold rather than raw expiry dates.

## Known failure modes

- Host unreachable or DNS resolution failure — connection error returned
- Port 443 not open or TLS handshake failure — connection/TLS error
- Certificate already expired — ok_check returns false
- Invalid or malformed URL/host input — validation error
- Timeout if host is slow to respond — timeout error

## How this service works

Call when an agent needs whether the port-443 certificate stays valid for at least 90 days. The threshold changes the ok_check bit. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/tls-expiry-90 first.

## Output

Returns a boolean ok_check bit indicating whether the target host's port-443 TLS certificate has at least 90 days of validity remaining, along with relevant certificate metadata about the expiry status.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048,
   "minLength": 8,
   "description": "Public URL whose hostname is inspected. Provide url or host. Private targets are rejected."
  },
  "host": {
   "type": "string",
   "examples": [
    "example.com"
   ],
   "maxLength": 253,
   "minLength": 1,
   "description": "Public hostname such as example.com. The port and check are fixed by the SKU. Provide host or url."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentshelf-syntexa-ch-tls-expiry-90-day-check-b0e3ad9a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)