DNS Lookup API

Lookup DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA, SRV) via Cloudflare DNS-over-HTTPS. Fast and reliable. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "dns-lookup": {
      "url": "https://dns-lookup.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://dns-lookup.api.klymax402.com/api/lookup" \
  -H "Content-Type: application/json" \
  -d '{"domain":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
network_lookup_dns	POST	/api/lookup	$0.005	Lookup DNS records for a domain

network_lookup_dns

Use this when you need to look up DNS records for a domain. Returns all matching records in JSON via Cloudflare DNS-over-HTTPS.

Parameters

Name	Type	Required	Description
domain	string	yes	Domain name to lookup (e.g. example.com)
type	string	no	DNS record type: A, AAAA, MX, TXT, CNAME, NS, SOA, SRV (default: A)

Example response:

{"domain":"example.com","type":"A","records":[{"name":"example.com","type":"A","data":"93.184.216.34","ttl":3600}],"queryTime":12,"resolver":"cloudflare"}

When to use: verifying DNS configuration, checking MX records before email setup, auditing TXT records for SPF/DKIM/DMARC, and debugging domain resolution issues.

Not for: SSL certificate check (use security_check_ssl), WHOIS domain info (use domain_lookup_intelligence), HTTP header analysis (use network_analyze_headers).

Example agent prompts

• "Look up DNS records for a domain"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
• Network: Base L2 (eip155:8453)
• Asset: USDC
• Facilitator: Coinbase CDP (primary), PayAI (fallback)
• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt
• Full API reference: https://klymax402.com/llms-full.txt
• Live stats: https://klymax402.com/stats

License

MIT