# Lookproof IP Address Info

> Lookproof IP Address Info is a paid API for AI agents from api.lookproof.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Classifies an IPv4 or IPv6 address against IANA special-purpose registries, returning its category, RFC reference, compressed/expanded forms, reverse DNS name, and IPv4-mapped form — all computed offline.

## Facts

- Endpoint: GET https://api.lookproof.dev/v1/ip/info?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lookproof-ip-address-info-1e942fed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dEDcstLv5Wp6LkpS5yBXu

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 lookproof-ip-address-info-1e942fed
```

Example prompt: Can you tell me whether 192.0.2.1 is a public IP address or a special-purpose one — like private, loopback, or documentation — and show me its reverse DNS name and which RFC covers it?

## When to prefer this

Choose this endpoint when you need fast, offline classification of an IP address against IANA special-purpose registries without making live DNS or WHOIS queries. Ideal for security pipelines, log enrichment, and firewall validation where latency and privacy matter. Prefer it over WHOIS or geolocation APIs when the goal is to determine if an address is routable on the public internet rather than finding ownership or geography.

## Known failure modes

- Invalid or malformed IP string returns a 4xx error
- IP string exceeding 64 characters is rejected by schema validation
- Empty or missing 'ip' query parameter returns a validation error
- Very unusual or future IANA allocations may not yet be covered

## How this service works

Check SPF, DMARC, DKIM, MTA-STS, DNSSEC and more, with results that explain what was found and why. Free browser checks and a pay-per-request API with x402.

## Output

Returns the IANA special-purpose classification (e.g. private, loopback, link-local, shared, documentation, 6to4, Teredo, NAT64, public), the governing RFC, compressed and expanded representations of the address, the reverse DNS (PTR) name, and — for IPv4-mapped IPv6 addresses — the underlying IPv4 address. All computed locally without external DNS queries.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "title": "IpInput",
     "required": [
      "ip"
     ],
     "properties": {
      "ip": {
       "type": "string",
       "title": "Ip",
       "maxLength": 64,
       "minLength": 2
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lookproof-ip-address-info-1e942fed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.lookproof.dev](https://www.zero.xyz/host/api.lookproof.dev/llms.txt)