# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from token-intel.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Performs live DNS resolution (IPv4/IPv6), TLS certificate inspection, and HTTP security header grading for any target domain.

## Facts

- Endpoint: GET https://token-intel.agentdiet.dev/v1/tls-scanner?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: token-intel.agentdiet.dev
- Website: https://token-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/token-intel-agentdiet-dev-domain-osint-tls-certificate-security-edc6c1a5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rdarXbrU1KRPdjc_EIN4C

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 token-intel-agentdiet-dev-domain-osint-tls-certificate-security-edc6c1a5
```

Example prompt: Can you run a TLS and security headers scan on stripe.com — I want to see what IPs it resolves to, who issued the certificate and when it expires, and how it scores on HTTP security headers?

## When to prefer this

Use this endpoint when you need a fast, single-call OSINT snapshot of a domain's DNS posture, TLS certificate health, and HTTP security header configuration without setting up local tooling like nmap, openssl, or securityheaders.com. Prefer it for automated recon pipelines, vendor risk assessments, or pre-launch security checklists where live certificate and DNS data is required.

## Known failure modes

- Domain does not exist or fails DNS resolution — no results returned
- Domain is unreachable or times out during TLS handshake
- Domain has no TLS certificate (HTTP-only) — certificate fields may be empty
- Invalid or malformed domain input — validation error returned
- Target blocks automated scanning — connection refused or incomplete response

## How this service works

Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade. (Live x402 v2, IETF MPP & MCP endpoint at https://token-intel.agentdiet.dev/v1/tls-scanner)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, subject, expiry date, validity status), and an HTTP security header analysis including presence and grading of headers such as HSTS, CSP, X-Frame-Options, and overall security grade.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string",
   "minLength": 1,
   "description": "Target domain name (e.g. anthropic.com, openai.com) for DNS, TLS certificate, and security header OSINT"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/token-intel-agentdiet-dev-domain-osint-tls-certificate-security-edc6c1a5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from token-intel.agentdiet.dev](https://www.zero.xyz/host/token-intel.agentdiet.dev/llms.txt)