# NFS TCP SRV Record Lookup via DNS-over-HTTPS

> NFS TCP SRV Record Lookup via 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 2026-10-20).

Resolves _nfs._tcp SRV records for a domain using Cloudflare DoH, returning priority, weight, port, and target host for the domain's NFS service.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/srv/nfs-tcp?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nfs-tcp-srv-record-lookup-via-dns-over-https-ce7dda37
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__TbQdEc1ayWMqW3a3Ns5Y

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 nfs-tcp-srv-record-lookup-via-dns-over-https-ce7dda37
```

Example prompt: Can you look up the NFS TCP SRV record for storage.example.com and tell me which host and port the NFS service is running on?

## When to prefer this

Use this endpoint when you need to programmatically discover where a domain's NFS service is hosted via standard DNS SRV discovery, without hardcoding hostnames or ports. Prefer this over manual NS/A record lookups when the target domain is expected to publish _nfs._tcp SRV records following RFC 2782 conventions.

## Known failure modes

- Domain has no _nfs._tcp SRV record — returns empty answer section
- Invalid or malformed domain name — returns DNS error
- DNS resolution failure from Cloudflare DoH — upstream timeout or SERVFAIL
- Domain does not exist (NXDOMAIN) — record not found response

## How this service works

NFS service discovery (_nfs._tcp.<domain>): SRV records with priority, weight, port and target host, from Cloudflare DoH. Tells a client where the domain's nfs service lives without guessing hosts. $0.01 per lookup.

## Output

Returns the SRV record set for _nfs._tcp.<domain>, including one or more records each containing priority (integer), weight (integer), port (integer), and target hostname — allowing a client to locate the NFS service without guessing hosts.

## 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/nfs-tcp-srv-record-lookup-via-dns-over-https-ce7dda37/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)