# 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).

Inspects a target domain's live DNS resolution (IPv4/IPv6), TLS certificate issuer and expiry, and HTTP security header grade in a single call.

## Facts

- Endpoint: GET https://token-intel.agentdiet.dev/v1/cert-transparency?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-3933a5b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W4VUe0mK6_rDQlJeDTbm8

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-3933a5b4
```

Example prompt: Can you run a full OSINT recon on anthropic.com — I want to see its DNS resolution, TLS certificate issuer and expiry date, and how it scores on HTTP security headers?

## When to prefer this

Choose this endpoint when you need a single-call summary of a domain's DNS resolution, TLS certificate validity, and HTTP security posture for OSINT, due diligence, or security auditing purposes — rather than querying a DNS resolver, a certificate transparency log, and a header scanner separately.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns empty or error DNS fields
- Domain has no HTTPS / TLS certificate — certificate fields will be null or indicate absence
- Domain is unreachable (firewall, timeout) — endpoint may return partial results or a timeout error
- Invalid domain input (malformed string) — returns a validation error
- HTTP security header fetch fails if the server refuses connections — headers grade may be unavailable

## 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/cert-transparency)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details (issuer, expiry date, chain info), and an HTTP security headers analysis with a grade — all for the specified domain, reflecting its current state at the time of the call.

## 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-3933a5b4/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)