> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.pinnacle.sh/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.pinnacle.sh/_mcp/server.

# Blast MMS to Audience

POST https://api.pinnacle.sh/messages/blast/mms
Content-Type: application/json

Send an MMS message to all contacts in an audience.&#x20;

Messages are distributed evenly across the provided sender phone numbers.&#x20;

Use the optional `schedule` parameter in `options` to schedule the blast for future delivery. When scheduled, the response will contain a `scheduleId` instead of blast details.

Reference: https://docs.pinnacle.sh/api-reference/messages/blast-mms

## Authentication

- `PINNACLE-API-KEY` header (required) — API Key authentication via header

## Request

### Body (application/json)

This endpoint expects a BlastMmsRequest.

- `audienceId` (string, required) — The audience ID to send the blast to. This identifier is a string that always begins with the prefix `aud_`, for example: `aud_abc123`.&#x20; You can create an audience via [the dashboard](https://app.pinnacle.sh/dashboard/audiences) or [API](/api-reference/audiences/create).
- `senders` (list of string, required) — Array of phone numbers to send from in E.164 format.&#x20; Messages will be distributed evenly across these senders. > **Note:** Sandbox numbers cannot be used for blasts. **Limit:** 1 min
- `message` (MMSContent, required) — Message with text and/or media files from a phone number.
- `options` (BlastMmsOptions, optional) — Additional settings to customize MMS blast delivery.

## Response

### 200

Successfully queued or scheduled the MMS blast.&#x20; * **Immediate blast**: Returns blast details including total recipients, messages, segments, and cost. * **Scheduled blast**: Returns a `scheduleId` and the schedule configuration.

- `messages_blast_mms_Response_200`

## Errors

### 400 Bad Request Error

The request was unacceptable, often due to providing an invalid update.&#x20; Errors may originate from invalid payload or from Pinnacle's additional validation checks. For example, providing an URL that cannot be accessed, updating a campaign that is currently being reviewed, updating data that you cannot access, sending a malformed message, and so on.&#x20; For `Pinnacle Validation Error` inspect the `error` payload to determine the source of the failure. These errors are likely due to additional validation and business logic checks. For `Request Validation Error` inspect the `description` and `errors` payload to determine the source of failure. These errors are likely due to invalid payload inside the request.

- `BlastMmsToAudienceRequestBadRequestError`

### 401 Unauthorized Error

The request lacks valid authentication credentials or the provided credentials are invalid.&#x20; Ensure you're including a valid API key in the request headers and that your account has the necessary permissions to access this endpoint.

- `error` (string, required) — Human-readable description of the error that occurred, corresponding to the HTTP status code.

### 402 Payment Required Error

Insufficient credits to complete this request.&#x20; This occurs when your account balance is below the required amount for processing the operation. Please add credits to your account to continue using the service.

- `error` (string, required) — Human-readable description of the error that occurred, corresponding to the HTTP status code.

### 403 Forbidden Error

Your subscription does not include access to this feature.&#x20; This occurs when attempting to use functionality that requires a higher subscription tier. Please upgrade your subscription to access this feature.

- `error` (string, required) — Human-readable description of the error that occurred, corresponding to the HTTP status code.

### 500 Internal Server Error

An unexpected error occurred on Pinnacle's servers while processing your request.&#x20; If this error persists, please contact support with the request details.

- `error` (string, required) — Human-readable description of the error that occurred, corresponding to the HTTP status code.

## Types

### MMSContent

Message with text and/or media files from a phone number.

- `mediaUrls` (list of string, required) — URLs of media files in this message.&#x20; See [supported media types](https://app.pinnacle.sh/supported-file-types?type=MMS).
- `text` (string, optional) — Text content that accompanies the media files.

### BlastMmsOptions

Additional settings to customize MMS blast delivery.

- `validate` (boolean, optional, default: false) — Set to true to validate the message before sending.&#x20; If validation fails, the blast is not sent.
- `schedule` (ScheduleSchema, optional) — Define when and how your message should be sent.

### BlastResponse

Response containing details about the scheduled blast.

- `blastId` (string, required) — Unique identifier for the blast. This identifier is a string that always begins with the prefix `blast_`, for example: `blast_1234567890`.
- `audienceId` (string, required) — The audience ID the blast was sent to. This identifier is a string that always begins with the prefix `aud_`, for example: `aud_abc123`.
- `totalRecipients` (integer, required) — Total number of recipients in the audience.
- `totalMessages` (integer, required) — Total number of messages to be sent.
- `totalSegments` (integer, required) — Total number of message segments across all messages.
- `totalCost` (double, required) — Total cost of the blast. For RCS blasts with a fallback configured, this reflects the actual mix of RCS and SMS/MMS pricing based on each recipient's RCS capability. For more details check the [Transactions page](https://app.pinnacle.sh/dashboard/settings/billing/transactions) and the [Audiences page](https://app.pinnacle.sh/dashboard/audiences) to see blasts.

### ScheduledBlastResponse

Response returned when a blast is scheduled for future delivery.

- `scheduleId` (string, required) — Unique identifier for the scheduled blast. This identifier is a string that always begins with the prefix `msg_sched_`, for example: `msg_sched_xxxxx`.
- `config` (ScheduledBlastResponseConfig, required) — The schedule configuration for the blast.

### ZodError

- `description` (string, required) — Human-readable summary of validation failures.
- `errors` (ZodErrorErrors, required) — Structured dictionary of issues containing two main sections: - `errors`: Array of global validation errors not tied to specific fields - `properties`: Object mapping field names to their specific validation errors, where each field contains an `errors` array

### Error

Standard error response returned when a request cannot be processed successfully.

- `error` (string, required) — Human-readable description of the error that occurred, corresponding to the HTTP status code.

### ScheduleSchema

Define when and how your message should be sent.

- `sendAt` (string, required) — The date and time you want your message to be sent. - Use [ISO 8601 format](https://en.wikipedia.org/wiki/ISO_8601), for example: `2024-12-17T14:30:00Z`. Format: `YYYY-MM-DDThh:mm` (e.g., `2024-12-25T14:30`). - This time must be at least 5 minutes in the future. - The message will be scheduled based on the `timezone` you provide. - If you set a `recurrence` schedule, this is the start date and time for the recurring schedule.
- `recurrence` (string, optional) — AWS cron expression for recurring schedules (6 fields).&#x20; [Learn more about cron expressions](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-scheduled-rule-pattern.html).&#x20; **Examples:** * `0 10 * * ? *` - Every day at 10:00 AM * `0/30 * * * ? *` - Every 30 minutes * `0 9 ? * MON-FRI *` - Every weekday at 9:00 AM * `0 12 1 * ? *` - First day of every month at noon
- `timezone` (string, optional, default: UTC) — IANA timezone identifier (e.g., `America/New_York`, `UTC`).&#x20; Defaults to `UTC` if not specified.
- `endDate` (string, optional) — Date and time when recurring messages should stop.&#x20; Format: `YYYY-MM-DDThh:mm`. Required if `recurrence` is set.

### ScheduledBlastResponseConfig

The schedule configuration for the blast.

- `sendAt` (string, optional) — When the first message will be sent.
- `recurrence` (string, optional) — AWS cron expression for recurring schedules.
- `timezone` (string, optional) — IANA timezone identifier.
- `endDate` (string, optional) — When recurring schedules will stop.

### ZodErrorErrors

Structured dictionary of issues containing two main sections: - `errors`: Array of global validation errors not tied to specific fields - `properties`: Object mapping field names to their specific validation errors, where each field contains an `errors` array

## Examples

### Immediate Blast Response

**Request**

```json
{
  "audienceId": "aud_abc123",
  "senders": [
    "+14155164736",
    "+14155164737"
  ],
  "message": {
    "mediaUrls": [
      "https://fastly.picsum.photos/id/941/300/300.jpg"
    ],
    "text": "Check out this image!"
  },
  "options": {
    "validate": true
  }
}
```

**Response**

```json
{
  "blastId": "blast_1234567890",
  "audienceId": "aud_abc123",
  "totalRecipients": 500,
  "totalMessages": 500,
  "totalSegments": 1000,
  "totalCost": 30
}
```

**SDK Code**

```python Immediate Blast Response
import requests

url = "https://api.pinnacle.sh/messages/blast/mms"

payload = {
    "audienceId": "aud_abc123",
    "senders": ["+14155164736", "+14155164737"],
    "message": {
        "mediaUrls": ["https://fastly.picsum.photos/id/941/300/300.jpg"],
        "text": "Check out this image!"
    },
    "options": { "validate": True }
}
headers = {
    "PINNACLE-API-KEY": "<apiKey>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Immediate Blast Response
const url = 'https://api.pinnacle.sh/messages/blast/mms';
const options = {
  method: 'POST',
  headers: {'PINNACLE-API-KEY': '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"audienceId":"aud_abc123","senders":["+14155164736","+14155164737"],"message":{"mediaUrls":["https://fastly.picsum.photos/id/941/300/300.jpg"],"text":"Check out this image!"},"options":{"validate":true}}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Immediate Blast Response
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.pinnacle.sh/messages/blast/mms"

	payload := strings.NewReader("{\n  \"audienceId\": \"aud_abc123\",\n  \"senders\": [\n    \"+14155164736\",\n    \"+14155164737\"\n  ],\n  \"message\": {\n    \"mediaUrls\": [\n      \"https://fastly.picsum.photos/id/941/300/300.jpg\"\n    ],\n    \"text\": \"Check out this image!\"\n  },\n  \"options\": {\n    \"validate\": true\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("PINNACLE-API-KEY", "<apiKey>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Immediate Blast Response
require 'uri'
require 'net/http'

url = URI("https://api.pinnacle.sh/messages/blast/mms")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["PINNACLE-API-KEY"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"audienceId\": \"aud_abc123\",\n  \"senders\": [\n    \"+14155164736\",\n    \"+14155164737\"\n  ],\n  \"message\": {\n    \"mediaUrls\": [\n      \"https://fastly.picsum.photos/id/941/300/300.jpg\"\n    ],\n    \"text\": \"Check out this image!\"\n  },\n  \"options\": {\n    \"validate\": true\n  }\n}"

response = http.request(request)
puts response.read_body
```

```java Immediate Blast Response
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.pinnacle.sh/messages/blast/mms")
  .header("PINNACLE-API-KEY", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"audienceId\": \"aud_abc123\",\n  \"senders\": [\n    \"+14155164736\",\n    \"+14155164737\"\n  ],\n  \"message\": {\n    \"mediaUrls\": [\n      \"https://fastly.picsum.photos/id/941/300/300.jpg\"\n    ],\n    \"text\": \"Check out this image!\"\n  },\n  \"options\": {\n    \"validate\": true\n  }\n}")
  .asString();
```

```php Immediate Blast Response
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.pinnacle.sh/messages/blast/mms', [
  'body' => '{
  "audienceId": "aud_abc123",
  "senders": [
    "+14155164736",
    "+14155164737"
  ],
  "message": {
    "mediaUrls": [
      "https://fastly.picsum.photos/id/941/300/300.jpg"
    ],
    "text": "Check out this image!"
  },
  "options": {
    "validate": true
  }
}',
  'headers' => [
    'Content-Type' => 'application/json',
    'PINNACLE-API-KEY' => '<apiKey>',
  ],
]);

echo $response->getBody();
```

```csharp Immediate Blast Response
using RestSharp;

var client = new RestClient("https://api.pinnacle.sh/messages/blast/mms");
var request = new RestRequest(Method.POST);
request.AddHeader("PINNACLE-API-KEY", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"audienceId\": \"aud_abc123\",\n  \"senders\": [\n    \"+14155164736\",\n    \"+14155164737\"\n  ],\n  \"message\": {\n    \"mediaUrls\": [\n      \"https://fastly.picsum.photos/id/941/300/300.jpg\"\n    ],\n    \"text\": \"Check out this image!\"\n  },\n  \"options\": {\n    \"validate\": true\n  }\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Immediate Blast Response
import Foundation

let headers = [
  "PINNACLE-API-KEY": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = [
  "audienceId": "aud_abc123",
  "senders": ["+14155164736", "+14155164737"],
  "message": [
    "mediaUrls": ["https://fastly.picsum.photos/id/941/300/300.jpg"],
    "text": "Check out this image!"
  ],
  "options": ["validate": true]
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.pinnacle.sh/messages/blast/mms")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

### Scheduled Blast Response

**Request**

```json
{
  "audienceId": "aud_abc123",
  "senders": [
    "+14155164736",
    "+14155164737"
  ],
  "message": {
    "mediaUrls": [
      "https://fastly.picsum.photos/id/941/300/300.jpg"
    ],
    "text": "Check out this image!"
  },
  "options": {
    "validate": true
  }
}
```

**Response**

```json
{
  "scheduleId": "msg_sched_xxxxx",
  "config": {
    "sendAt": "2024-12-25T10:00",
    "timezone": "America/New_York"
  }
}
```

**SDK Code**

```python Scheduled Blast Response
import requests

url = "https://api.pinnacle.sh/messages/blast/mms"

payload = {
    "audienceId": "aud_abc123",
    "senders": ["+14155164736", "+14155164737"],
    "message": {
        "mediaUrls": ["https://fastly.picsum.photos/id/941/300/300.jpg"],
        "text": "Check out this image!"
    },
    "options": { "validate": True }
}
headers = {
    "PINNACLE-API-KEY": "<apiKey>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Scheduled Blast Response
const url = 'https://api.pinnacle.sh/messages/blast/mms';
const options = {
  method: 'POST',
  headers: {'PINNACLE-API-KEY': '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"audienceId":"aud_abc123","senders":["+14155164736","+14155164737"],"message":{"mediaUrls":["https://fastly.picsum.photos/id/941/300/300.jpg"],"text":"Check out this image!"},"options":{"validate":true}}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Scheduled Blast Response
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.pinnacle.sh/messages/blast/mms"

	payload := strings.NewReader("{\n  \"audienceId\": \"aud_abc123\",\n  \"senders\": [\n    \"+14155164736\",\n    \"+14155164737\"\n  ],\n  \"message\": {\n    \"mediaUrls\": [\n      \"https://fastly.picsum.photos/id/941/300/300.jpg\"\n    ],\n    \"text\": \"Check out this image!\"\n  },\n  \"options\": {\n    \"validate\": true\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("PINNACLE-API-KEY", "<apiKey>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Scheduled Blast Response
require 'uri'
require 'net/http'

url = URI("https://api.pinnacle.sh/messages/blast/mms")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["PINNACLE-API-KEY"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"audienceId\": \"aud_abc123\",\n  \"senders\": [\n    \"+14155164736\",\n    \"+14155164737\"\n  ],\n  \"message\": {\n    \"mediaUrls\": [\n      \"https://fastly.picsum.photos/id/941/300/300.jpg\"\n    ],\n    \"text\": \"Check out this image!\"\n  },\n  \"options\": {\n    \"validate\": true\n  }\n}"

response = http.request(request)
puts response.read_body
```

```java Scheduled Blast Response
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.pinnacle.sh/messages/blast/mms")
  .header("PINNACLE-API-KEY", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"audienceId\": \"aud_abc123\",\n  \"senders\": [\n    \"+14155164736\",\n    \"+14155164737\"\n  ],\n  \"message\": {\n    \"mediaUrls\": [\n      \"https://fastly.picsum.photos/id/941/300/300.jpg\"\n    ],\n    \"text\": \"Check out this image!\"\n  },\n  \"options\": {\n    \"validate\": true\n  }\n}")
  .asString();
```

```php Scheduled Blast Response
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.pinnacle.sh/messages/blast/mms', [
  'body' => '{
  "audienceId": "aud_abc123",
  "senders": [
    "+14155164736",
    "+14155164737"
  ],
  "message": {
    "mediaUrls": [
      "https://fastly.picsum.photos/id/941/300/300.jpg"
    ],
    "text": "Check out this image!"
  },
  "options": {
    "validate": true
  }
}',
  'headers' => [
    'Content-Type' => 'application/json',
    'PINNACLE-API-KEY' => '<apiKey>',
  ],
]);

echo $response->getBody();
```

```csharp Scheduled Blast Response
using RestSharp;

var client = new RestClient("https://api.pinnacle.sh/messages/blast/mms");
var request = new RestRequest(Method.POST);
request.AddHeader("PINNACLE-API-KEY", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"audienceId\": \"aud_abc123\",\n  \"senders\": [\n    \"+14155164736\",\n    \"+14155164737\"\n  ],\n  \"message\": {\n    \"mediaUrls\": [\n      \"https://fastly.picsum.photos/id/941/300/300.jpg\"\n    ],\n    \"text\": \"Check out this image!\"\n  },\n  \"options\": {\n    \"validate\": true\n  }\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Scheduled Blast Response
import Foundation

let headers = [
  "PINNACLE-API-KEY": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = [
  "audienceId": "aud_abc123",
  "senders": ["+14155164736", "+14155164737"],
  "message": [
    "mediaUrls": ["https://fastly.picsum.photos/id/941/300/300.jpg"],
    "text": "Check out this image!"
  ],
  "options": ["validate": true]
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.pinnacle.sh/messages/blast/mms")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```