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Phone Number E.164 Normalizer
x402
Phone Number E.164 Normalizer is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).
Normalizes a phone number string to E.164 international format given a known country region code, with no external network calls.
Price / call$0.002
Success—
StatusUnknown
How this service works
Call when an agent needs a phone number normalized to E.164 when the country is known. No network. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/phone-e164 first.
Output
Returns the phone number reformatted as an E.164 string (e.g. '+14155550123'), computed locally without any external network lookups. The transformation is deterministic and pure — same input always yields the same output.
Example use cases
CRM phone number standardization
“I have a list of customer phone numbers from the UK that look like '07911 123456' — can you convert them to E.164 format so I can store them properly?”
SMS gateway pre-flight formatting
“Before I send an SMS, normalize this French phone number '06 12 34 56 78' to E.164 — the region is FR.”
User registration input cleanup
“A user just signed up and entered their phone as '(212) 555-0199' — treat it as a US number and convert it to E.164 for me.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/phone-e164?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you have a phone number string and a known country/region and need a reliable, purely local E.164 normalization without any external API calls, carrier lookups, or LLM inference. It is ideal for data pipeline preprocessing, CRM ingestion, or pre-SMS-send formatting where determinism and low latency matter. Prefer the free sandbox endpoint (/v1/sandbox/phone-e164) for testing before paying $0.002 USDC per call on this production endpoint.
Side effects
- Malformed or unparseable phone number string returns an error
- Region code not matching a valid ISO 3166-1 alpha-2 code returns a validation error
- Phone number too short or too long (outside libphonenumber valid range) returns an error
- Missing required 'phone' or 'region' fields returns a 400-style error
- Payment not provided or insufficient USDC causes a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| phone | string | Phone number. A leading + is accepted. National numbers need region. |
| region | string | ISO 3166-1 alpha-2 region such as US. Required for numbers that do not start with +. |
Tags
x402
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