---
title: "Premium phone number lookup"
method: POST
path: "/v1/contact-details/premium-phone/sync"
tags: ["Contact details"]
---

# Premium phone number lookup

`POST /v1/contact-details/premium-phone/sync`

## Request

- Base URL: `https://api.fiber.ai`
- URL: `https://api.fiber.ai/v1/contact-details/premium-phone/sync`
- Auth: none declared

Find and verify phone numbers for a LinkedIn profile using multiple data sources.

<span>⚡ <strong>Rate limit:</strong> 120 requests per 1 minute</span>

<span>💰 <strong>Cost:</strong> 5 credits per request&nbsp;<span title="Pricing shown is default pricing. Actual pricing may vary.">ⓘ</span></span>

<span>⏱ <strong>Recommended timeout:</strong> 1 minute&nbsp;<span title="Recommended timeout: set your HTTP client timeout to at least 1 minute for this endpoint.">ⓘ</span></span>

## Request body

- object
  - `apiKey` string, required: Your Fiber API key
  - `linkedinUrl` string, required: LinkedIn profile identifier. Accepts a full URL, a bare slug, or a LinkedIn entity URN.
  - `patience` 'MINIMUM' | 'LOW' | 'MEDIUM' | 'HIGH' | 'EXTREME' | 'MAXIMUM' | 'null', nullable: How long to wait for phone-number verification after a number is found: LOW waits up to 15 seconds, MEDIUM 30 seconds, HIGH 60 seconds, EXTREME 2 minutes, and MAXIMUM 10 minutes. Higher patience increases average response time but improves identity and reachability accuracy. MINIMUM is the least thorough verification option.

## Response `200`

Default Response

- object
  - `output` object, required
    - `linkedinUrl` string, required: Resolved LinkedIn profile URL.
    - `phoneNumbers` object[], required: Phone numbers found for this person, annotated with identity verification when available.
      - `number` string, required: Phone number in E.164 format.
      - `type` 'mobile' | 'other' | 'unknown', required: Phone line type.
      - `callerIdValidation` object, nullable: Result for attempted phone number verification.
        - `category` 'EXACT_MATCH' | 'PROBABLE_MATCH' | 'FAMILY_MEMBER' | 'BUSINESS_LINE' | 'INCONCLUSIVE', required: How confidently this phone number is associated with the person.
        - `reasoning` string, required: Brief explanation for the confidence level.
        - `callerIdName` string, required: The registered name for this phone number.
  - `chargeInfo` union, required
    - object: Credits were charged immediately for this operation
      - `method` 'charged-now', required
      - `creditsCharged` number, required
      - `lowCreditAlert` object, nullable: Contains a link to get more credits, a warning message, and the remaining credit count.
        - `getMoreCreditsUrl` string, uri, required: URL to top up credits or restart billing cycle to get fresh credits.
        - `message` string, required: Human-readable credits warning.
        - `availableCredits` number, required: Number of credits remaining in the current billing period.
    - object: Credits will be charged after the operation completes
      - `method` 'charging-later', required
      - `message` string, required
      - `lowCreditAlert` object, nullable: Contains a link to get more credits, a warning message, and the remaining credit count.
        - `getMoreCreditsUrl` string, uri, required: URL to top up credits or restart billing cycle to get fresh credits.
        - `message` string, required: Human-readable credits warning.
        - `availableCredits` number, required: Number of credits remaining in the current billing period.
    - object: Credits that were charged for an asynchronous operation
      - `method` 'charged-for-async-process', required
      - `creditsCharged` number, required
      - `message` string, required
      - `lowCreditAlert` object, nullable: Contains a link to get more credits, a warning message, and the remaining credit count.
        - `getMoreCreditsUrl` string, uri, required: URL to top up credits or restart billing cycle to get fresh credits.
        - `message` string, required: Human-readable credits warning.
        - `availableCredits` number, required: Number of credits remaining in the current billing period.
    - object: No credits were charged for this operation
      - `method` 'free', required
      - `message` string, required
      - `lowCreditAlert` object, nullable: Contains a link to get more credits, a warning message, and the remaining credit count.
        - `getMoreCreditsUrl` string, uri, required: URL to top up credits or restart billing cycle to get fresh credits.
        - `message` string, required: Human-readable credits warning.
        - `availableCredits` number, required: Number of credits remaining in the current billing period.
    - object: Credits were refunded for this operation
      - `method` 'credits-refunded', required
      - `creditsRefunded` number, required
      - `message` string, required
      - `lowCreditAlert` object, nullable: Contains a link to get more credits, a warning message, and the remaining credit count.
        - `getMoreCreditsUrl` string, uri, required: URL to top up credits or restart billing cycle to get fresh credits.
        - `message` string, required: Human-readable credits warning.
        - `availableCredits` number, required: Number of credits remaining in the current billing period.
  - `warnings` object[], nullable: Warnings about extraneous fields in request
    - `field` string, required: Full path to extraneous field (e.g., 'searchParams.ExtraField')
    - `message` string, required: Warning message
  - `advice` string[], nullable: Tips, recommendations, and suggestions for using this API effectively.

## Other responses

- `400`: Default Response
- `401`: Default Response
- `402`: Default Response
- `403`: Default Response
- `404`: Default Response
- `410`: Default Response
- `422`: Default Response
- `429`: Default Response
- `500`: Default Response
- `503`: Default Response

## Changes

- **2026-10-27** `a15af2897f6b`: 1 info
  - added the non-success response with the status `410`
- **2026-09-01** `f8a78c729da9`: 1 info
  - added the new optional request property `patience`
- **2026-07-31** `4002aa81d4fb`: 2 breaking, 1 info
  - the response property `advice` became nullable for the status `200`
  - the response property `advice` became optional for the status `200`
  - the `advice` response's property default value `` was removed for the status `200`
- **2026-07-13** `f14ac2efab0c`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/fiber/apis/fiber-ai-api/changes/v1/contact-details/premium-phone/sync/post.md)

---

[API](https://skmtc.dev/fiber/apis/fiber-ai-api.md) - [All operations](https://skmtc.dev/fiber/apis/fiber-ai-api/llms.txt) - [OpenAPI document](https://skmtc.dev/fiber/apis/fiber-ai-api/revisions/d8237cb5c35e?raw)