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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 polymarket-odds.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.
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://polymarket-odds.agentdiet.dev/v1/asn-lookup)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header grade/assessment for the queried domain.
Example use cases
Pre-vendor security due diligence
“Before we integrate with this vendor, can you check their domain api.acmecorp.com for TLS certificate validity, who issued it, when it expires, and whether their HTTP security headers are up to standard?”
Competitor domain security audit
“I want to compare our security posture to our competitor — can you run a DNS and TLS recon on stripe.com and tell me their certificate issuer, expiry, and security header grade?”
Monitoring certificate expiry risk
“Can you check if the TLS certificate for my company's domain mybusiness.io is close to expiring, and also pull the DNS resolution and HTTP security header score while you're at it?”
Technical details
Endpoint
GEThttps://polymarket-odds.agentdiet.dev/v1/asn-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined DNS + TLS + HTTP security header audit in a single call for any domain, especially for OSINT workflows, vendor security reviews, certificate expiry monitoring, or competitive security posture analysis. It is preferred over separate DNS lookup or SSL checker tools when you want all three signals at once without stitching multiple APIs together.
Side effects
- Invalid or non-existent domain returns an error or empty DNS results
- Domain with no HTTPS/TLS returns no certificate data
- Rate limiting or payment failure (HTTP 402) if quota exceeded
- Timeout if the target domain is unreachable or slow to respond
- Malformed domain input (e.g. missing TLD) may return a validation error
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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