# 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 (issuer/expiry), and HTTP security header grading for a given domain.

## Facts

- Endpoint: GET https://token-intel.agentdiet.dev/v1/asn-lookup?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-2c907217
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AGryBDwZTVJmkrtkE4ECl

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-2c907217
```

Example prompt: Can you check the TLS certificate issuer and expiry, DNS resolution (both IPv4 and IPv6), and HTTP security header grade for anthropic.com?

## When to prefer this

Choose this endpoint when you need a quick, combined OSINT snapshot of a domain's DNS infrastructure, TLS certificate health, and HTTP security header posture in a single call — ideal for security audits, due diligence workflows, and certificate expiry monitoring. Prefer it over individual DNS or SSL tools when you want all three signals (DNS, TLS, headers) aggregated in one response.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns an error or empty DNS results
- Domain has no HTTPS endpoint — TLS certificate fields may be null or unavailable
- Domain actively blocks scanning — may return incomplete or timeout results
- Invalid domain format input — returns a validation error
- Transient network issues — may return partial data or a timeout error

## 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/asn-lookup)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details (issuer, expiry date, validity status), and an HTTP security header grade/breakdown, giving a comprehensive OSINT snapshot of the domain's security posture.

## 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-2c907217/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)