# agentshelf.syntexa.ch Phone Min-10 Digits Check

> agentshelf.syntexa.ch Phone Min-10 Digits Check is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).

Validates whether a given phone number string contains at least 10 digits

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-phone-min10?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-syntexa-ch-phone-min-10-digits-check-fd9d5431
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rywv8GTq5kFkYl4oNWPDe

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 agentshelf-syntexa-ch-phone-min-10-digits-check-fd9d5431 -d '<json body>'
```

Example prompt: Can you check if the phone number '+1 (800) 555-1234' has at least 10 digits?

## When to prefer this

Use this endpoint when you need a fast, cheap, deterministic check that a phone number string has at least 10 digits — no LLM or external network calls involved. Prefer the free sandbox endpoint POST /v1/sandbox/check-phone-min10 first for testing. Choose this over full E.164 normalization endpoints when you only need a digit-count gate, not full formatting validation.

## Known failure modes

- Empty or missing 'value' field returns an error
- Value exceeding 20,000 characters rejected
- Malformed JSON body returns 400 error
- Network timeout if service is temporarily unavailable
- Payment failure if USDC balance is insufficient for the $0.004 fee

## How this service works

Call when an agent needs whether a phone has at least 10 digits. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/check-phone-min10 first.

## Output

Returns a pass/fail indication of whether the provided phone number string contains at least 10 digits, likely as a boolean or structured validation response.

## 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": [
    "5551234567"
   ],
   "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/agentshelf-syntexa-ch-phone-min-10-digits-check-fd9d5431/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)