# NetIntel SSL Certificate Facts

> NetIntel SSL Certificate Facts is a paid API for AI agents from netintel.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Fetches SSL/TLS certificate details for any domain — issuer, SANs, validity dates, days until expiry, expired/self-signed flags, TLS version, and chain length — via a single TLS handshake in under 2 seconds.

## Facts

- Endpoint: GET https://netintel.dev/ssl/cert
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netintel-ssl-certificate-facts-2e15dacd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EZqvqvpilws3yqGmJQNvY

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 netintel-ssl-certificate-facts-2e15dacd
```

Example prompt: Can you pull the SSL certificate details for stripe.com — I want to know who issued it, when it expires, how many days are left, and whether it's self-signed or using TLSv1.3?

## When to prefer this

Choose this endpoint when you need fast, lightweight SSL/TLS certificate metadata — issuer, expiry, SANs, TLS version — without a full security grade or vulnerability scan. It is cheaper and faster than /ssl/analyze, requires no API key, and is ideal for monitoring pipelines, expiry alerting, SAN coverage checks, or any agent workflow that just needs raw certificate facts rather than a scored security report.

## Known failure modes

- Domain not reachable or TLS handshake timeout — connection refused or no response
- Invalid domain format — returns error if host cannot be resolved
- Port out of range — clamped to 1–65535 but unreachable ports yield connection failure
- Domain with no TLS listener on specified port — returns error or empty cert fields
- Payment not processed — x402 payment required before response is returned

## How this service works

Fast SSL/TLS certificate facts for any domain — issuer, subject, SANs, valid from/to, days until expiry, expired/self-signed flags, TLS version, chain length. One TLS handshake, sub-2-second answer. The light, cheap tier under /ssl/analyze (full analysis, grading). No API key.

## Output

Returns a JSON object with the domain and port checked, issuer (common name and organization), subject, list of SANs, validity window (valid_from, valid_to), days_remaining, boolean flags for expired/self_signed/not_yet_valid, TLS version negotiated, certificate chain length, signature algorithm, key type and bit length, any findings, and cache_age_seconds indicating data freshness.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "port": {
       "type": "number",
       "description": "Port to connect to (default: 443, clamped to 1-65535). Alias: p"
      },
      "domain": {
       "type": "string",
       "description": "Domain to check (e.g. example.com) — a full URL is also accepted, the host is extracted. Aliases: host, hostname, url, site"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "key": {
       "type": "object",
       "properties": {
        "bits": {
         "type": [
          "number",
          "null"
         ]
        },
        "type": {
         "type": [
          "string",
          "null"
         ]
        }
       }
      },
      "port": {
       "type": "number"
      },
      "sans": {
       "type": "array"
      },
      "domain": {
       "type": "string"
      },
      "issuer": {
       "type": "object",
       "properties": {
        "common_name": {
         "type": [
          "string",
          "null"
         ]
        },
        "organization": {
         "type": [
          "string",
          "null"
         ]
        }
       }
      },
      "expired": {
       "type": "boolean"
      },
      "sig_alg": {
       "type": [
        "string",
        "null"
       ]
      },
      "subject": {
       "type": [
        "string",
        "null"
       ]
      },
      "findings": {
       "type": "array"
      },
      "valid_to": {
       "type": [
        "string",
        "null"
       ]
      },
      "valid_from": {
       "type": [
        "string",
        "null"
       ]
      },
      "self_signed": {
       "type": "boolean"
      },
      "tls_version": {
       "type": [
        "string",
        "null"
       ]
      },
      "chain_length": {
       "type": "number"
      },
      "not_yet_valid": {
       "type": "boolean"
      },
   
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "key": {
   "bits": 256,
   "type": "EC"
  },
  "port": 443,
  "sans": [
   "example.com",
   "www.example.com"
  ],
  "domain": "example.com",
  "issuer": {
   "common_name": "R11",
   "organization": "Let's Encrypt"
  },
  "expired": false,
  "sig_alg": "sha256WithRSAEncryption",
  "subject": "example.com",
  "findings": [],
  "valid_to": "2026-09-29T23:59:59.000Z",
  "valid_from": "2026-07-01T00:00:00.000Z",
  "self_signed": false,
  "tls_version": "TLSv1.3",
  "chain_length": 3,
  "not_yet_valid": false,
  "days_remaining": 27,
  "sans_truncated": false,
  "cache_age_seconds": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-ssl-certificate-facts-2e15dacd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel.dev](https://www.zero.xyz/host/netintel.dev/llms.txt)