# PublishApi
All URIs are relative to *https://api.fastly.com*
[**publish**](PublishApi.md#publish) | **POST** /service/{service_id}/publish/ | Send messages to Fanout subscribers
## publish
Send one or more messages to [Fanout](https://developer.fastly.com/learning/concepts/real-time-messaging/fanout) subscribers. Each message specifies a channel, and Fanout will deliver the message to all subscribers of its channel. > **IMPORTANT:** For compatibility with GRIP, this endpoint requires a trailing slash, and the API token may be provided in the `Authorization` header (instead of the `Fastly-Key` header) using the `Bearer` scheme.
```rust
let cfg = &Configuration::default();
let params = PublishParams {
// parameters
};
publish(cfg, params)
```
### Parameters
**service_id** | **String** | Alphanumeric string identifying the service. | [required] |
**publish_request** | Option\<[**PublishRequest**](PublishRequest.md)> | | |
### Return type
**String**
### Authorization
[token](../README.md#token)
### HTTP request headers
- **Content-Type**: application/json
- **Accept**: text/plain
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