DKIM TXT DNS Record Lookup for Domain

Use this endpoint when an agent needs to programmatically retrieve the DKIM public key DNS record for a specific hostname without performing LLM inference or additional network calls beyond the DNS lookup itself. Prefer the sandbox endpoint (POST /v1/sandbox/dns-txt-dkim-dkim) for testing before committing to the paid live endpoint. Useful for email deliverability checks, DKIM setup verification, and domain authentication audits.

• Domain does not have a DKIM TXT record published — returns empty or not-found response
• Invalid or malformed hostname input — returns validation error
• DNS resolution failure or timeout — returns network error
• Hostname exceeds 253 characters — rejected by schema validation
• Payment failure (x402) — call not executed