# GeekVault SSL Certificate Checker

> GeekVault SSL Certificate Checker is a paid API for AI agents from api.geekvault.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Retrieves TLS/SSL certificate details for a given host, including subject, issuer, and validity dates

## Facts

- Endpoint: GET https://api.geekvault.dev/net-tools/v1/ssl-check?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/geekvault-ssl-certificate-checker-3f1a27c3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9-hMsYTndIsds0Phh6ywf

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 geekvault-ssl-certificate-checker-3f1a27c3
```

Example prompt: Can you check the SSL certificate details for api.example.com — specifically when it expires and who issued it?

## When to prefer this

Use this endpoint when you need a quick, no-auth, pay-per-call TLS certificate inspection without setting up any SDK or API key. Ideal for agents that need to check certificate expiry or issuer on-demand for arbitrary hosts, especially when no persistent monitoring subscription is required.

## Known failure modes

- Host unreachable or DNS resolution failure — connection error returned
- No TLS service on the specified port — connection refused or timeout
- Invalid hostname format — validation error
- Certificate could not be retrieved — server may not support TLS

## How this service works

Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.

## Output

Returns a JSON object containing the host, port, certificate subject, issuer, and the not_before and not_after validity timestamps — enough to determine if the cert is valid, who issued it, and when it will expire.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "host"
 ],
 "properties": {
  "host": {
   "type": "string"
  },
  "port": {
   "type": "string",
   "description": "Puerto TLS a consultar. Por defecto 443."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "host",
  "port",
  "subject",
  "issuer",
  "not_before",
  "not_after"
 ],
 "properties": {
  "host": {
   "type": "string"
  },
  "port": {
   "type": "integer",
   "format": "int32",
   "minimum": 0
  },
  "issuer": {
   "type": "string"
  },
  "subject": {
   "type": "string"
  },
  "not_after": {
   "type": "string"
  },
  "not_before": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/geekvault-ssl-certificate-checker-3f1a27c3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.geekvault.dev](https://www.zero.xyz/host/api.geekvault.dev/llms.txt)