# Update Contact

Update an existing contact in your address book. This endpoint allows you to modify contact details such as the phone number or associated metadata.

### <mark style="color:green;">`POST`</mark> `/addressbook/contacts/{contact_id}`&#x20;

Replace `{contact_id}` with the associated contact ID of the record you want to update.

#### Required Permission

```
update:Contacts
```

Your API key must have this permission enabled in order to use this endpoint.

### Example Request

```bash
curl --location 'https://<hostname>/addressbook/contacts/3392287d-7a79-4789-9ef8-7dc174836688' \
  --header 'Accept: application/json' \
  --header 'Content-Type: application/json' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --data '{
    "msisdn": "55555555555",
    "alias": "john",
    "meta": {
      "NAME": "John Doe"
    }
  }'
```

Replace `YOUR_API_KEY` with your API key.

{% hint style="info" %}
All endpoints shown in this documentation use a **sample base URL**. The production API endpoint is provided by our team upon request.
{% endhint %}

#### Request Parameters

Path Parameters

| Field       | Type   | Required | Description                                                 |
| ----------- | ------ | -------- | ----------------------------------------------------------- |
| contact\_id | string | Yes      | The associated contact ID of the record you want to update. |

Body Parameters

| Field  | Type   | Required | Description                                   |
| ------ | ------ | -------- | --------------------------------------------- |
| msisdn | string | No       | Updated phone number in international format. |
| alias  | string | No       | Updated alias for the contact.                |
| meta   | object | No       | Updated metadata associated with the contact. |

#### Responses

#### Success (HTTP 200)

Returned when the contact is successfully updated.

```json
{
  "success": true,
  "record": {
    "id": "3392287d-7a79-4789-9ef8-7dc174836688",
    "alias": "john",
    "msisdn": "55555555555",
    "updated_on": "2025-11-10T20:45:30.000Z"
  }
}
```

#### Validation Error (HTTP 400)

Returned when the specified contact does not exist.

```json
{
  "success": false,
  "error": {
    "name": "NotFoundError",
    "statusCode": 404,
    "message": "Contact not found"
  }
}
```

{% hint style="info" %}
Updating a contact does not affect historical message records.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://wiki.mobivatebulksms.com/contact-management/update-contact.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.