# Unprice DNS Lookup API

> Unprice DNS Lookup API is a paid API for AI agents from volkov.evgeny.m2.fvds.ru, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-09).

Resolves DNS records (A, AAAA, MX, TXT, CNAME) for a given hostname via a pay-per-request endpoint using USDC on Base.

## Facts

- Endpoint: GET https://volkov.evgeny.m2.fvds.ru/pay/dns?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/unprice-dns-lookup-api-e3e50e3c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MuVFTVJvIzhktdw18mF3J

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 unprice-dns-lookup-api-e3e50e3c
```

Example prompt: Can you look up all the DNS records for github.com — I want to see the A, MX, and TXT records?

## When to prefer this

Use this endpoint when you need a pay-per-use, no-subscription DNS lookup accessible programmatically via the x402 micropayment protocol on Base. It is well-suited for agents that need occasional DNS resolution without managing API keys, paying $0.002 USDC per call. Prefer alternatives like Google DNS or Cloudflare DNS APIs if you need high-volume, free, or SLA-backed resolution.

## Known failure modes

- Invalid or non-existent hostname returns empty record arrays
- Missing required 'host' query parameter may return an error or empty result
- Network timeouts if upstream DNS resolver is slow
- Payment failure if USDC balance is insufficient on Base
- Rate limiting or server unavailability on the underlying VPS

## How this service works

Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC receipts, and recent wallet statements.

## Output

Returns a JSON object containing the queried hostname and arrays of DNS record values for each type: A (IPv4 addresses), AAAA (IPv6 addresses), MX (mail exchange), TXT (text records), and CNAME (canonical name aliases). Empty arrays are returned for record types with no results.

## 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": {
      "host": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "a": [
   "93.184.216.34"
  ],
  "mx": [],
  "txt": [],
  "aaaa": [],
  "host": "example.com",
  "cname": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/unprice-dns-lookup-api-e3e50e3c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from volkov.evgeny.m2.fvds.ru](https://www.zero.xyz/host/volkov.evgeny.m2.fvds.ru/llms.txt)