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agentdiet-subdomain-scan
x402
agentdiet-subdomain-scan is a paid API for AI agents from agentdiet.dev, paid per call via x402 or MPP, $0.01/call, status unknown (last checked 2026-10-20).
Performs domain OSINT recon by checking live DNS resolution (IPv4/IPv6), TLS certificate details, and HTTP security headers for a given domain.
Price / call$0.01
Success—
StatusUnknown
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://agentdiet.dev/v1/subdomain-scan)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer name, expiry date), and an HTTP security grade derived from the presence and quality of security response headers for the queried domain.
Example use cases
Pre-launch security audit
“Before we go live, check example.com for its TLS certificate issuer and expiry, whether it resolves over IPv6, and what HTTP security grade it gets.”
Vendor due diligence check
“I'm vetting a new SaaS vendor at vendor-api.io — can you pull their DNS resolution, SSL cert details, and HTTP security header grade so I can assess their security posture?”
Monitor competitor domain health
“Check competitor.com's TLS certificate — who issued it, when does it expire, and how does it score on HTTP security headers?”
Technical details
Endpoint
GEThttps://agentdiet.dev/v1/subdomain-scan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, combined OSINT snapshot of a domain's DNS posture, TLS certificate health, and HTTP security header grade in a single call, without spinning up separate DNS, SSL, and header-checking tools. Ideal for security audits, vendor assessments, and pre-deployment checks where a fast, paid-per-call model is acceptable.
Side effects
- Domain does not exist or fails DNS resolution — returns empty or null DNS records
- Domain is unreachable over HTTP/HTTPS — TLS and security header data unavailable
- Invalid domain format supplied — input validation error
- Domain resolves but has no TLS certificate (HTTP only) — TLS fields empty
- Rate limit or payment failure — request rejected with 402 or 429 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domainrequired | string | Target domain name (e.g. anthropic.com, openai.com) for DNS, TLS certificate, and security header OSINT |
Output
Schema · Response
{
"type": "object"
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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