---
title: "Create a new Communication"
method: POST
path: "/communications.json"
tags: ["Communications"]
---

# Create a new Communication

`POST /communications.json`

Outlines the parameters and data fields used when creating a new Communication

## Query parameters

- `fields` string

## Headers

- `X-API-VERSION` string

## Request body

- object
  - `data` object, required
    - `body` string, required — The body value.
    - `external_properties` object[]
      - `name` string — The ExternalProperty name. Note: **there is a limit of 5 external_properties per Communication**
      - `value` string — The ExternalProperty value.
    - `matter` object
      - `id` integer — The unique identifier for a single Matter associated with the Communication. The keyword `null` is not valid for this field.
    - `notification_event_subscribers` object[]
      - `user_id` string, required — The unique identifier for a User to be added as a notification event subscriber to the Phone Log Communication. Note: Only applicable to Phone Log Communications, invalid for other communication types.
    - `received_at` string, required — The date-time for the Communication. (Expects an ISO-8601 date-time.)
    - `receivers` object[]
      - `_deleted` boolean — Whether or not the receivers should be deleted.
      - `id` integer — Unique ids for the receivers of this Communication.
      - `type` 'User' | 'Contact' — Types of the receivers of this Communication.
    - `senders` object[]
      - `_deleted` boolean — Whether or not the senders should be deleted.
      - `id` integer — Unique ids for the senders of this Communication.
      - `type` 'User' | 'Contact' — Types of the senders of this Communication.
    - `subject` string, required — The subject value.
    - `type` 'PhoneCommunication' | 'EmailCommunication', required — Type of the Communication.

## Response `201`

Created

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Not Found
- `422` — Unprocessable Entity
- `429` — Too Many Requests

---

[API](https://skmtc.net/clio/apis/clio-api-documentation.md) · [All operations](https://skmtc.net/clio/apis/clio-api-documentation/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/clio/clio-api-documentation/revisions/73791ddd1207/schema)