# Create a new Stream Message.

**POST /v1/Services/{ServiceSid}/Streams/{StreamSid}/Messages**

Create a new Stream Message.


## Servers
- https://sync.twilio.com: https://sync.twilio.com ()


## Authentication methods
- Account sid auth token


## Parameters

### Path parameters
- **ServiceSid** (string)
  The SID of the [Sync Service](https://www.twilio.com/docs/sync/api/service) to create the new Stream Message in.
- **StreamSid** (string)
  The SID of the Sync Stream to create the new Stream Message resource for.


### Body: application/x-www-form-urlencoded (object)

- **Data** ()
  A JSON string that represents an arbitrary, schema-less object that makes up the Stream Message body. Can be up to 4 KiB in length.


## Responses
### 201
Created
#### Headers
- **Access-Control-Allow-Origin** (string)
  Specify the origin(s) allowed to access the resource
- **Access-Control-Allow-Methods** (string)
  Specify the HTTP methods allowed when accessing the resource
- **Access-Control-Allow-Headers** (string)
  Specify the headers allowed when accessing the resource
- **Access-Control-Allow-Credentials** (boolean)
  Indicates whether the browser should include credentials
- **Access-Control-Expose-Headers** (string)
  Headers exposed to the client

#### Body: application/json (object)
- **sid** (string | null)
  The unique string that we created to identify the Stream Message resource.
- **data** (object | null)
  An arbitrary, schema-less object that contains the Stream Message body. Can be up to 4 KiB in length.


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