# URL SSL Certificate Intelligence

> URL SSL Certificate Intelligence is a paid API for AI agents from url-intel-api-production.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Checks the SSL/TLS certificate status of a given URL, returning validity, issuer, and days remaining

## Facts

- Endpoint: POST https://url-intel-api-production.up.railway.app/ssl?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/url-ssl-certificate-intelligence-d951981d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ArEcZ3YNsW_RwrY0yOcRq

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 url-ssl-certificate-intelligence-d951981d -d '<json body>'
```

Example prompt: Can you check the SSL certificate for https://example.com — is it valid, who issued it, and how many days are left before it expires?

## When to prefer this

Use this endpoint when you need a quick, structured SSL/TLS certificate check for any HTTPS URL — especially when you need machine-readable output (validity, issuer, days remaining) for automated workflows, security audits, or pre-deployment checks. Prefer this over manual browser inspection or generic URL analysis tools when you need programmatic certificate metadata.

## Known failure modes

- URL is unreachable or does not exist — may return an error or valid: false
- URL uses HTTP instead of HTTPS — SSL check may fail or return invalid
- Certificate is self-signed and unrecognized — may return valid: false with unknown issuer
- Malformed URL input causes request parsing failure
- Rate limiting or payment failure returns 402 status

## How this service works

URL intelligence for AI agents

## Output

Returns a JSON object with: 'valid' (boolean indicating if the certificate is currently valid), 'issuer' (the certificate authority that issued the cert, e.g. 'Let's Encrypt'), and 'days_remaining' (integer count of days until the certificate expires).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid": true,
  "issuer": "Let's Encrypt",
  "days_remaining": 90
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/url-ssl-certificate-intelligence-d951981d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from url-intel-api-production.up.railway.app](https://www.zero.xyz/host/url-intel-api-production.up.railway.app/llms.txt)