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Agent402 UK Phone Number E.164 Validator
x402
Agent402 UK Phone Number E.164 Validator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).
Validates a phone number against E.164 format rules without performing any carrier or network lookup
Price / call$0.001
Success—
StatusDown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
A validation result indicating whether the submitted phone number string conforms to E.164 international format (e.g. starts with '+' followed by country code and subscriber number, correct length). No carrier, network, or reachability data is returned.
Example use cases
Form input phone validation
“Before I save this user's profile, check that the phone number +12025550178 they entered is actually a valid E.164 format — no need to look up the carrier.”
Batch onboarding data cleanup
“I have a new customer record with phone number +33612345678 — can you verify it's properly formatted in E.164 before I pass it to our CRM?”
Pre-SMS send sanity check
“Before triggering the notification workflow, validate that +819012345678 is a correctly structured E.164 phone number so we don't send to a malformed number.”
Technical details
Endpoint
POSThttps://agent402.co.uk/v1/validate/phoneWhen to prefer
Use this endpoint when you need a fast, cheap, format-only check that a phone number is E.164-compliant before storing or passing it downstream — ideal for form validation pipelines, data ingestion, and pre-send checks where carrier or network reachability is irrelevant and cost matters at scale.
Side effects
- Phone number missing '+' prefix returns invalid
- Non-numeric characters cause format failure
- Number too short or too long for E.164 spec returns invalid
- Missing or empty phone field returns a validation error
- Malformed JSON body returns 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| phone | string | Phone number |
Output
Schema · Response
{
"type": "json",
"example": {
"country_code": "44",
"valid_e164_format": true
}
}Tags
x402
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