# Delx Phone E164 Normalize

> Delx Phone E164 Normalize is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Normalizes a free-form phone number string into E.164 canonical format (e.g. +14155550100) given an optional default region code.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/phone-e164-normalize
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-phone-e164-normalize-c404bbb2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RjtD_FsyMPw92ZQLu5DnJ

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 delx-phone-e164-normalize-c404bbb2 -d '<json body>'
```

Example prompt: Can you normalize the phone number '(415) 555-0100' to E.164 international format, assuming it's a US number?

## When to prefer this

Choose this endpoint when you need a lightweight, low-cost ($0.001 USDC) single-call phone number normalization to E.164 without standing up your own libphonenumber dependency. Ideal for agent pipelines that need to standardize phone fields before passing them to messaging APIs (Twilio, Vonage), CRM writes, or deduplication logic. Prefer this over manual regex when you need region-aware parsing of ambiguous local formats.

## Known failure modes

- Unparseable phone number (e.g. random string, too few digits) — may return null or error for e164_candidate
- Missing default_region when number has no country code prefix — normalization may fail or produce wrong country
- Invalid region code (e.g. 'XX') — may fall back or error
- Non-numeric garbage input — likely returns error or null result

## How this service works

Normalize phone digits toward E.164-like form. Call when standardizing phone inputs for agents. Returns e164_candidate and digits as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

## Output

Returns a JSON object containing: 'e164_candidate' (the full E.164 formatted phone number with leading +, e.g. '+14155550100'), 'digits' (the raw numeric digits without the +, e.g. '14155550100'), and 'schema' (a versioned schema identifier string 'delx/util-phone-e164-normalize/v1').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "phone": {
   "type": "string",
   "description": "Phone number in free form"
  },
  "default_region": {
   "type": "string",
   "description": "Default region code e.g. US"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "digits": "14155550100",
  "schema": "delx/util-phone-e164-normalize/v1",
  "e164_candidate": "+14155550100"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-phone-e164-normalize-c404bbb2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)