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Domain OSINT, TLS Certificate & Security Headers Recon
Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from json-repair.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.
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://json-repair.agentdiet.dev/v1/asn-lookup)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate details including issuer and expiry date, and an HTTP security grade based on response headers present on the domain.
Example use cases
Security audit before vendor onboarding
“Before we onboard this vendor, can you check the DNS records, TLS certificate issuer and expiry, and HTTP security grade for their domain acmecorp.io?”
Monitoring competitor domain security posture
“I want to know how openai.com scores on HTTP security headers and whether their TLS certificate is still valid — can you run a full domain recon on it?”
Verifying a suspicious phishing domain
“Someone sent a link from secure-login-paypal.net — can you check its DNS resolution, who issued its TLS certificate, and what security headers it has?”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/v1/asn-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, unified OSINT snapshot of a domain's DNS posture, TLS certificate health, and HTTP security configuration in a single call. It is ideal for security audits, vendor vetting, phishing domain investigation, or continuous monitoring of certificate expiry — especially when you need live data rather than cached WHOIS records.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS fields
- Domain has no TLS certificate — certificate fields will be absent or null
- Domain is unreachable or times out — partial or error response returned
- Invalid domain string input — validation error returned
- Domain resolves but serves no HTTP headers — security grade may be unavailable
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"
}Reviews
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