# Strale Phone Number Validation

> Strale Phone Number Validation is a paid API for AI agents from api.strale.io, paid per call via x402, $0.0216/call, status unknown (last checked 2026-09-15).

Validates a phone number's format, country, and type for any global number, returning structured validation results with a cryptographic audit record.

## Facts

- Endpoint: GET https://api.strale.io/x402/v2/phone-validate
- Price: $0.0216/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/strale-phone-number-validation-80e8466d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zTbgiKaZitpBcznoGD8kz

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 strale-phone-number-validation-80e8466d
```

Example prompt: Can you validate the phone number +44 7911 123456 and tell me if it's a real, properly formatted UK mobile number?

## When to prefer this

Choose this endpoint when you need tamper-evident, auditable phone validation with a cryptographic chain hash — ideal for compliance-sensitive workflows, fraud prevention pipelines, or regulated industries. It covers 27 countries and supports any phone number format as input, making it suitable for messy, user-submitted data. Prefer over generic validation libraries when you need a REST/MCP/x402-compatible call with a returned audit record rather than a local validation function.

## Known failure modes

- Invalid or unparseable phone number format returns a validation failure or error status
- Missing required phone_number query parameter returns a 400 Bad Request
- Ambiguous number without country_code hint may return incorrect country assignment
- Very unusual or newly assigned number ranges may not be recognized
- Network timeout or upstream service error returns 5xx response

## How this service works

The trust layer for AI agents — 250+ independently tested data capabilities across 27 countries. Execute capabilities via REST, MCP, A2A, or x402 micropayments. Every call returns an audit record with cryptographic chain hashing.

## Output

Returns a structured validation result indicating whether the phone number is valid, its normalized E.164 format, detected country code, number type (mobile/landline/VOIP/etc.), and a cryptographic audit record with chain hashing for traceability. Invalid or unrecognized numbers return an appropriate error or invalid status.

## 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",
     "required": [
      "phone_number"
     ],
     "properties": {
      "country_code": {
       "type": "string",
       "description": "ISO 2-letter country code hint (optional)"
      },
      "phone_number": {
       "type": "string",
       "description": "Phone number in any format"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/strale-phone-number-validation-80e8466d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)