# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from defi-yield.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 a given domain

## Facts

- Endpoint: GET https://defi-yield.agentdiet.dev/v1/dns-recon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: defi-yield.agentdiet.dev
- Website: https://defi-yield.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/defi-yield-agentdiet-dev-domain-osint-tls-certificate-security-bae5390a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e85KYF_M_KA5S080KoAfE

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 defi-yield-agentdiet-dev-domain-osint-tls-certificate-security-bae5390a
```

Example prompt: Can you run a full DNS and TLS security recon on anthropic.com — I want to see the IP addresses it resolves to, who issued the SSL cert and when it expires, and what HTTP security headers they have?

## When to prefer this

Choose this endpoint when you need a lightweight, combined OSINT snapshot of a domain covering DNS, TLS, and HTTP security headers in a single call, especially for vendor due diligence, security auditing, or certificate expiry monitoring. Prefer this over dedicated tools when you want a rapid single-call reconnaissance rather than deep vulnerability scanning or full port enumeration.

## Known failure modes

- Domain does not exist or fails to resolve — returns DNS lookup error
- TLS certificate is missing or self-signed — may return partial data
- Domain is unreachable or times out — returns connectivity error
- Invalid domain format supplied — returns validation error
- Non-existent or parked domain with no HTTP headers to inspect — returns partial result

## 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://defi-yield.agentdiet.dev/v1/dns-recon)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate details (issuer, expiry date), and an HTTP security header audit with a security grade for the target domain.

## 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/defi-yield-agentdiet-dev-domain-osint-tls-certificate-security-bae5390a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defi-yield.agentdiet.dev](https://www.zero.xyz/host/defi-yield.agentdiet.dev/llms.txt)