---
title: "Opt Out/Unsubscribe Contact"
method: POST
path: "/optout-list-member.json"
tags: ["Contacts & Lists"]
---

# Opt Out/Unsubscribe Contact

`POST /optout-list-member.json`

Opt Out List Member

Unsubscribe contact from one or all lists  
If sending marketing by law you must enable an unsubscribe method. [Anti-Spam Policy](https://help.kudosity.com/s/article/44001077041-anti-spam-policy)

## Response `200`

Successful response.

- object
  - `list_ids` integer[] — One or more list ID's that contact was opted out of.
  - `error` object — Error messages related to this call.
    - `CODE` string — Error code.
    - `HEADER` integer — HTTP header.
    - `DESCRIPTION` string — Description of the error.

---

[API](https://skmtc.net/kudosity/apis/transmit-sms-api.md) · [All operations](https://skmtc.net/kudosity/apis/transmit-sms-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/kudosity/transmit-sms-api/versions/9f6c34b849af/schema)