---
title: "Check Duplicate Phones"
method: POST
path: "/outbound-leads/check-duplicates"
tags: ["Outbound Leads"]
---

# Check Duplicate Phones

`POST /outbound-leads/check-duplicates`

Check which phone numbers already exist as outbound leads.

## Request body

- CheckDuplicatePhonesRequest — Request to check which phone numbers already exist as outbound leads.
  - `phone_numbers` string[], required

## Response `200`

Successful Response

- CheckDuplicatePhonesResponse — Response containing phone numbers that already exist.
  - `existing_phone_numbers` string[], required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/openintake/apis/fastapi.md) · [All operations](https://skmtc.dev/openintake/apis/fastapi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/openintake/fastapi/revisions/b642b91e0a5c/schema)