# NetIntel SSL Certificate Inspector

> NetIntel SSL Certificate Inspector is a paid API for AI agents from netintel-production-440c.up.railway.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Fetches and parses the SSL/TLS certificate for a given domain, returning expiry, issuer, SANs, key info, chain length, and security findings.

## Facts

- Endpoint: GET https://netintel-production-440c.up.railway.app/ssl/cert
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netintel-ssl-certificate-inspector-a069ef55
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BrM5Jo3C3LxS2bL5gVxYV

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-inspector-a069ef55
```

Example prompt: Can you check the SSL certificate for stripe.com — I want to know who issued it, when it expires, whether it's self-signed, and how many days are left before it needs renewal?

## When to prefer this

Choose this endpoint when you need detailed, structured SSL certificate metadata for a single domain — including expiry countdown, issuer identity, SANs, key specs, and chain length — rather than just a pass/fail validity check. Ideal for automated certificate monitoring, security audits, or vendor due diligence. Prefer this over generic TLS scanning tools when you need pay-per-call access with no signup, automatic no-charge on failures, and machine-readable JSON output ready for downstream agent logic.

## Known failure modes

- Domain does not exist or cannot be resolved — returns error with no charge
- Domain is unreachable or port is closed — connection timeout error, no charge
- Domain has no SSL certificate (plain HTTP only) — error indicating no TLS
- Invalid domain input fails schema validation — rejected before billing
- Upstream TLS handshake failure — no charge per NetIntel policy

## How this service works

Network intelligence API — 138 endpoints, all pay-per-call via x402 micropayments (USDC on Base or Solana mainnet).

NetIntel is agent fair-trade aligned: transparent per-call pricing in USDC on Base or Solana via x402, no API keys or signup, and automatic no-charge on server errors, upstream failures, and input-validation rejections — failed calls are never billed across NetIntel's network, domain, and data-intelligence endpoints.

## Output

Returns a JSON object with the domain and port probed, certificate subject and SANs list, issuer (common name and organization), validity window (valid_from, valid_to, days_remaining), boolean flags for expired/not_yet_valid/self_signed, TLS version negotiated, signature algorithm, public key type and bit size, certificate chain length, an array of security findings, and a cache_age_seconds field 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-inspector-a069ef55/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel-production-440c.up.railway.app](https://www.zero.xyz/host/netintel-production-440c.up.railway.app/llms.txt)