# dns-svcb-via-nextdns

> dns-svcb-via-nextdns is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Retrieves SVCB DNS records for a domain as answered by NextDNS via DNS over HTTPS, including records, TTL, response code, DNSSEC validation status, and resolver answer time.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/svcb/via/nextdns?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-svcb-via-nextdns-0fa5bf7f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rx6ABaTwAs6shVTRb46UJ

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-svcb-via-nextdns-0fa5bf7f
```

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

## When to prefer this

Use this endpoint when you specifically need to see how NextDNS resolves SVCB records for a domain — especially when comparing resolver behavior, detecting DNS filtering or split-horizon answers, verifying DNSSEC validation, or measuring NextDNS-specific propagation lag. Prefer it over generic DNS lookups when NextDNS resolver fidelity or filtering behavior is the focus.

## Known failure modes

- Domain does not exist — NXDOMAIN response code returned with no records
- NextDNS resolver fails to respond — SERVFAIL response code returned
- Domain exists but has no SVCB records — NOERROR with empty record set
- Invalid domain name format — request may fail or return an error
- Network timeout reaching NextDNS DoH endpoint — no answer time available

## How this service works

SVCB records for a domain as answered by NextDNS (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 SVCB DNS records for the queried domain as answered by NextDNS, including the record data, TTL, DNS response code (NOERROR, NXDOMAIN, or SERVFAIL), whether the resolver performed and validated DNSSEC, 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-svcb-via-nextdns-0fa5bf7f/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)