# NumberIntel Phone Number Intelligence

> NumberIntel Phone Number Intelligence is a paid API for AI agents from numberintel.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Looks up NANP phone number metadata including geographic region, timezone, toll-free/premium status, and format validity.

## Facts

- Endpoint: GET https://numberintel.dev/v1/number
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numberintel-phone-number-intelligence-934d1dd9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QECqVIeJOuL2wHUENkyy0

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 numberintel-phone-number-intelligence-934d1dd9
```

Example prompt: Can you look up the phone number +16022966261 and tell me what US state and timezone it belongs to, and whether it's toll-free or a premium rate number?

## When to prefer this

Use this endpoint when you need structured intelligence about a North American (NANP) phone number — specifically area code metadata, geographic attribution, timezone resolution, toll-free/premium classification, and format validation — and when per-call micropayment via x402/USDC is acceptable. Prefer this over generic phone validation APIs when you need timezone-aware local time or geo-region data tied to the area code, or when integrating into a USDC-on-Base payment flow.

## Known failure modes

- Invalid or non-NANP number format returns valid_format: false with null/empty geographic fields
- Unknown or unrecognized area code returns npa_known: false with null geo data
- Missing required 'number' query parameter returns a 400-level error
- Payment failure or insufficient USDC balance on Base returns 402 Payment Required
- Non-NANP international numbers (outside US/Canada/Caribbean) are not supported and may return implausible results

## How this service works

Phone number static intelligence: E.164 normalization, format validity, NANP plausibility checks, geography, timezones and current local time for any US/CA number.

## Output

Returns a JSON object with the E.164-normalized number, NPA area code, geographic data (country, state/region), list of applicable timezones, current local time per timezone, boolean flags for toll-free, premium rate, format validity, plausibility, and whether the NPA is a known area code.

## 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",
     "required": [
      "number"
     ],
     "properties": {
      "number": {
       "type": "string",
       "description": "NANP phone number, any common format (E.164 preferred)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "geo": {
       "type": [
        "object",
        "null"
       ]
      },
      "npa": {
       "type": "string"
      },
      "e164": {
       "type": "string"
      },
      "npa_known": {
       "type": "boolean"
      },
      "plausible": {
       "type": "boolean"
      },
      "timezones": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "toll_free": {
       "type": "boolean"
      },
      "premium_rate": {
       "type": "boolean"
      },
      "valid_format": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "geo": {
   "state": "US-AZ",
   "region": "Arizona",
   "country": "US"
  },
  "npa": "602",
  "e164": "+16022966261",
  "npa_known": true,
  "plausible": true,
  "timezones": [
   "America/Phoenix"
  ],
  "toll_free": false,
  "local_time": [
   {
    "tz": "America/Phoenix",
    "time": "Sun 20:30"
   }
  ],
  "premium_rate": false,
  "valid_format": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/numberintel-phone-number-intelligence-934d1dd9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numberintel.dev](https://www.zero.xyz/host/numberintel.dev/llms.txt)