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Phone Number Check & Normalizer
x402
Phone Number Check & Normalizer is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Validates and normalizes a phone number to E.164 format, determines its country, and checks national number length — entirely offline using libphonenumber data.
Price / call$0.005
Success—
StatusUnknown
How this service works
60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.
Output
Returns the E.164-normalized phone number, the tel: URI, the national dialling form, the resolved country (including disambiguation among the 12 shared +1 calling code countries), and a validity flag based on the country's numbering plan rules. All computed offline — no external API dependency.
Example use cases
CRM phone field sanitization
“I'm about to save a customer's phone number '(415) 555-2671' to our database — can you normalize it to E.164 and confirm it's a valid US number?”
Identifying ambiguous +1 country
“This phone number +18684302000 came in with just a +1 prefix — can you tell me whether it's US, Canadian, or Caribbean, and give me the national dialing form?”
Form input validation before submission
“A user typed '07911 123456' as their UK number — can you validate it and give me the properly formatted tel: URI and E.164 version before I submit it?”
Technical details
Endpoint
POSThttps://flat-rate-llm.kikoribera03.workers.dev/v1/util/phoneWhen to prefer
Choose this endpoint when you need fast, offline phone number validation and normalization with no API key setup and no dependency on external services being online. Ideal for preprocessing user-submitted phone numbers before storage, detecting country of origin including shared +1 Caribbean/Canada/US disambiguation, and obtaining tel: URI or E.164 format. Not suitable if you need live carrier lookup, line type detection (mobile vs landline), or real-time number reachability checks.
Side effects
- Unparseable input (garbage string not recognizable as a phone number) — returns validation failure or error
- Ambiguous number without country context where multiple formats match — best-effort country assignment
- Numbers from very recently allocated or obscure ranges may not match libphonenumber's embedded data (data freshness lag)
- Short codes or premium-rate special numbers may not validate as standard numbers
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| phonerequired | string | The phone number, in any usual notation: +34 612 34 56 78, 0034612345678, (612) 345-678. |
| country | string | Optional ISO 3166-1 alpha-2 country, e.g. ES. Only used when the number carries no country code. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| e164 | string | |
| phone | string | |
| valid | boolean | |
| length | number | |
| telUri | string | |
| country | string | |
| countryCode | number | |
| typesByLength | array | |
| nationalNumber | string | |
| possibleLengths | array |
Tags
x402
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