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NANP Phone Number Validator
x402
NANP Phone Number Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).
Validates whether a phone number conforms to North American Numbering Plan (NANP) +1 rules
Price / call$0.002
Success—
StatusUnknown
How this service works
Call when an agent needs whether a phone number matches NANP +1 rules. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/check-phone-nanp first.
Output
A validation result indicating whether the submitted phone number string matches NANP +1 rules, likely including a boolean match/valid field and potentially details about why the number fails if it does not conform.
Example use cases
Pre-send SMS phone validation
“Before we send that campaign SMS, check whether +1-212-555-0173 is actually a valid NANP number so we don't waste the send.”
Form submission phone screening
“A user just submitted the phone number +1-900-555-0101 in our signup form — does it pass NANP validation rules?”
CRM data quality check
“We imported a contact with phone number +1-123-456-7890 from a CSV — can you verify if it's a legitimate NANP +1 number before we add it to the CRM?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-phone-nanp?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, deterministic, no-LLM check that a phone number string conforms to NANP +1 rules — particularly useful for US and Canadian phone number validation in data pipelines, form validation, or CRM hygiene. Prefer the free sandbox endpoint /v1/sandbox/check-phone-nanp for testing. Use this paid endpoint when operating in production and needing confirmed NANP rule adherence without any network lookups or AI inference.
Side effects
- Empty or missing value field returns an error
- Phone number string exceeds maxLength of 20000 characters (unlikely in practice but schema-enforced)
- Malformed request body returns 400-level error
- Non-string or null value may cause validation failure
- Payment of $0.002 USDC not provided results in 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
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