# DNS CNAME Lookup via DNS.SB (DNS over HTTPS)

> DNS CNAME Lookup via DNS.SB (DNS over HTTPS) is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Retrieves CNAME records for a domain as answered by the DNS.SB resolver, including records, TTL, response code, DNSSEC validation status, and answer time.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/cname/via/dnssb?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-cname-lookup-via-dns-sb-dns-over-https-d70a1bbf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SsiBEhCQpJp6VkiEnR1Ix

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability dns-cname-lookup-via-dns-sb-dns-over-https-d70a1bbf
```

Example prompt: What CNAME records does DNS.SB return for example.com? I want to see the TTL, response code, whether DNSSEC was validated, and how fast the resolver answered.

## When to prefer this

Choose this endpoint when you need to specifically see how the DNS.SB resolver answers a CNAME query — useful for comparing resolver behavior, detecting propagation lag, identifying filtering differences, or checking DNSSEC validation. Prefer this over generic DNS tools when DNS.SB is one of several resolvers being compared in a multi-resolver diagnostic workflow.

## Known failure modes

- Domain does not exist — NXDOMAIN response code returned with no records
- Resolver fails to answer — SERVFAIL response code returned
- No CNAME record exists for domain — empty records with NOERROR
- Domain name input is malformed or missing — request error
- DNS.SB resolver temporarily unreachable — service error or timeout

## How this service works

CNAME records for a domain as answered by DNS.SB (DNS over HTTPS): the records, TTL, response code (NOERROR/NXDOMAIN/SERVFAIL), whether the resolver validated DNSSEC, and the resolver's answer time. Compare resolvers to spot propagation lag, filtering or split-horizon answers. $0.01 per lookup.

## Output

Returns the CNAME record data for the queried domain as answered by DNS.SB, including: the resolved CNAME target(s), TTL value, DNS response code (NOERROR, NXDOMAIN, or SERVFAIL), a flag indicating whether DNSSEC was validated by the resolver, and the resolver's answer latency in milliseconds.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dns-cname-lookup-via-dns-sb-dns-over-https-d70a1bbf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)