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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 onchain-risk.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://onchain-risk.agentdiet.dev/v1/subdomain-scan)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, validity period, expiry date), and an HTTP security header grade indicating the presence and quality of security headers such as HSTS, CSP, and X-Frame-Options for the specified domain.
Example use cases
Pre-vendor security due diligence
“Before we onboard this new SaaS vendor, can you check their domain security posture for api.newvendor.com — specifically the TLS cert issuer and expiry, whether they have proper security headers, and what IPs they resolve to?”
Detect expiring SSL certificate
“Check if the SSL certificate on our company domain acmecorp.io is close to expiring and tell me who issued it and what the exact expiry date is.”
Competitive OSINT on a rival domain
“I want a quick security recon on competitor.com — pull the DNS resolution, TLS certificate details, and HTTP security header grade so I can benchmark them against our own setup.”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/subdomain-scan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single unified OSINT snapshot covering DNS, TLS, and HTTP security posture for any domain without having to stitch together separate DNS lookup, certificate check, and header scanning tools. It is ideal for security due diligence, pre-onboarding vendor checks, monitoring certificate expiry, or competitive reconnaissance on a domain's security configuration.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS result
- TLS certificate absent (HTTP-only domain) — TLS fields may be null or missing
- Domain is unreachable or times out — scan may return partial results
- Invalid domain format provided — API returns validation error
- Rate limiting or payment failure via x402 — HTTP 402 returned
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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