# Phone Number Minimum 7 Digits Validator

> Phone Number Minimum 7 Digits Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-24).

Checks whether a given phone number string contains at least 7 digits

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-phone-min7?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phone-number-minimum-7-digits-validator-a7d2d295
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cHfNWqUv5Qnnc89J1H4I_

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 phone-number-minimum-7-digits-validator-a7d2d295 -d '<json body>'
```

Example prompt: Can you check whether the phone number '+44 20 7946 0958' has at least 7 digits in it?

## When to prefer this

Use this endpoint when you need a deterministic, code-executed (no LLM) check that a phone number string contains at least 7 digits. Prefer the free sandbox endpoint POST /v1/sandbox/check-phone-min7 first; pay $0.003 USDC only when the sandbox is unavailable or a paid guarantee is required. Choose over LLM-based reasoning when auditability and consistency matter.

## Known failure modes

- Empty or missing value field returns validation error
- Value exceeding 20000 characters rejected
- Non-string input may cause schema mismatch
- Network timeout on the paid endpoint when sandbox is unavailable

## How this service works

Call when an agent needs whether a phone has at least 7 digits. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-phone-min7 first.

## Output

A boolean or structured response indicating whether the provided phone number string contains at least 7 numeric digits, allowing the agent to determine minimum length compliance.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "description": "JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."
  },
  "value": {
   "type": "string",
   "examples": [
    "5551234"
   ],
   "maxLength": 20000,
   "minLength": 1,
   "description": "Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."
  },
  "schema": {
   "description": "JSON Schema document for schema-check SKUs. Omit it on string checks."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phone-number-minimum-7-digits-validator-a7d2d295/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)