> ## Documentation Index
> Fetch the complete documentation index at: https://docs.orbit.devotel.io/llms.txt
> Use this file to discover all available pages before exploring further.

# USSD API

> USSD endpoints exposed by the Devotel CPaaS API

# USSD API

USSD endpoints exposed by the Devotel CPaaS API

**Base path:** `/api/v1/ussd`

**Endpoint count:** 4

***

### Get the configured USSD menu

<Note>
  `GET /api/v1/ussd/menu`
</Note>

Returns the authenticated tenant's USSD menu definition under `data.menu`, or `null` when none has been configured yet.

<RequestExample>
  <CodeGroup>
    ```bash cURL theme={null}
    curl -X GET "https://api.orbit.devotel.io/api/v1/ussd/menu" \
      -H "X-API-Key: dv_live_sk_your_key_here" 
    ```

    ```typescript Node.js theme={null}
    import { Orbit } from '@devotel-orbit/node'

    const orbit = new Orbit({
      apiKey: process.env.ORBIT_API_KEY!,
    })

    const res = await fetch('https://api.orbit.devotel.io/api/v1/ussd/menu', {
      method: 'GET',
      headers: {
        'X-API-Key': process.env.ORBIT_API_KEY!,
      },
    })
    console.log(await res.json())


    ```

    ```python Python theme={null}
    import os, requests

    headers = {"X-API-Key": os.environ["ORBIT_API_KEY"]}
    r = requests.get("https://api.orbit.devotel.io/api/v1/ussd/menu", headers=headers)
    print(r.json())
    ```

    ```go Go theme={null}
    package main

    import (
    	"bytes"
    	"net/http"
    	"os"
    )

    func main() {
    	req, _ := http.NewRequest("GET", "https://api.orbit.devotel.io/api/v1/ussd/menu", nil)
    	req.Header.Set("X-API-Key", os.Getenv("ORBIT_API_KEY"))

    	http.DefaultClient.Do(req)
    }
    ```

    ```ruby Ruby theme={null}
    require 'net/http'
    require 'json'

    uri = URI('https://api.orbit.devotel.io/api/v1/ussd/menu')
    req = Net::HTTP::Get.new(uri)
    req['X-API-Key'] = ENV['ORBIT_API_KEY']


    res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |h| h.request(req) }
    puts res.body
    ```

    ```php PHP theme={null}
    <?php
    $ch = curl_init('https://api.orbit.devotel.io/api/v1/ussd/menu');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
      'X-API-Key: ' . getenv('ORBIT_API_KEY'),

    ]);

    echo curl_exec($ch);
    ```
  </CodeGroup>
</RequestExample>

***

### USSD aggregator session callback

<Note>
  `POST /api/v1/ussd/callback/{tenantId}`
</Note>

Public webhook the USSD aggregator (e.g. Africa's Talking) POSTs to on every step of a session. Accepts JSON or form-encoded bodies with `sessionId`, `phoneNumber`, `serviceCode`, and the accumulated `text`. Responds with a `text/plain` body beginning `CON ` (continue) or `END ` (terminate). The `:tenantId` path segment scopes the call to the reseller tenant that owns the menu.

<ParamField path="tenantId" type="string" required>
  Platform tenant id that owns the USSD menu.
</ParamField>

<RequestExample>
  <CodeGroup>
    ```bash cURL theme={null}
    curl -X POST "https://api.orbit.devotel.io/api/v1/ussd/callback/{tenantId}" \
      -H "X-API-Key: dv_live_sk_your_key_here" \
      -H "Content-Type: application/json" \
      -d '{}'
    ```

    ```typescript Node.js theme={null}
    import { Orbit } from '@devotel-orbit/node'

    const orbit = new Orbit({
      apiKey: process.env.ORBIT_API_KEY!,
    })

    const res = await fetch('https://api.orbit.devotel.io/api/v1/ussd/callback/{tenantId}', {
      method: 'POST',
      headers: {
        'X-API-Key': process.env.ORBIT_API_KEY!,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({}),
    })
    console.log(await res.json())
    ```

    ```python Python theme={null}
    import os, requests

    headers = {"X-API-Key": os.environ["ORBIT_API_KEY"]}
    headers["Content-Type"] = "application/json"
    r = requests.post("https://api.orbit.devotel.io/api/v1/ussd/callback/{tenantId}", headers=headers, json={})
    print(r.json())
    ```

    ```go Go theme={null}
    package main

    import (
    	"bytes"
    	"net/http"
    	"os"
    )

    func main() {
    	req, _ := http.NewRequest("POST", "https://api.orbit.devotel.io/api/v1/ussd/callback/{tenantId}", bytes.NewBuffer([]byte(`{}`)))
    	req.Header.Set("X-API-Key", os.Getenv("ORBIT_API_KEY"))
    	req.Header.Set("Content-Type", "application/json")
    	http.DefaultClient.Do(req)
    }
    ```

    ```ruby Ruby theme={null}
    require 'net/http'
    require 'json'

    uri = URI('https://api.orbit.devotel.io/api/v1/ussd/callback/{tenantId}')
    req = Net::HTTP::Post.new(uri)
    req['X-API-Key'] = ENV['ORBIT_API_KEY']
    req['Content-Type'] = 'application/json'
    req.body = {}.to_json
    res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |h| h.request(req) }
    puts res.body
    ```

    ```php PHP theme={null}
    <?php
    $ch = curl_init('https://api.orbit.devotel.io/api/v1/ussd/callback/{tenantId}');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
      'X-API-Key: ' . getenv('ORBIT_API_KEY'),
      'Content-Type: application/json',
    ]);
    curl_setopt($ch, CURLOPT_POSTFIELDS, <<<JSON
    {}
    JSON);
    echo curl_exec($ch);
    ```
  </CodeGroup>
</RequestExample>

***

### Simulate a USSD session step

<Note>
  `POST /api/v1/ussd/simulate`
</Note>

Runs the USSD engine against an `text` input string (the aggregator's accumulated `*`-joined keypresses) and returns the resulting screen, exactly as the live callback would. Pass an inline `menu` to preview an unsaved definition; otherwise the tenant's configured menu is used. Useful for building and testing menus before pointing the aggregator at the callback.

<ParamField body="text" type="string">
  Accumulated input string, `*`-joined (empty for the initial dial).
</ParamField>

<ParamField body="menu" type="object">
  A USSD menu definition: a tree of `nodes` (screens) navigated from `root`.
</ParamField>

<RequestExample>
  <CodeGroup>
    ```bash cURL theme={null}
    curl -X POST "https://api.orbit.devotel.io/api/v1/ussd/simulate" \
      -H "X-API-Key: dv_live_sk_your_key_here" \
      -H "Content-Type: application/json" \
      -d '{}'
    ```

    ```typescript Node.js theme={null}
    import { Orbit } from '@devotel-orbit/node'

    const orbit = new Orbit({
      apiKey: process.env.ORBIT_API_KEY!,
    })

    const res = await fetch('https://api.orbit.devotel.io/api/v1/ussd/simulate', {
      method: 'POST',
      headers: {
        'X-API-Key': process.env.ORBIT_API_KEY!,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({}),
    })
    console.log(await res.json())
    ```

    ```python Python theme={null}
    import os, requests

    headers = {"X-API-Key": os.environ["ORBIT_API_KEY"]}
    headers["Content-Type"] = "application/json"
    r = requests.post("https://api.orbit.devotel.io/api/v1/ussd/simulate", headers=headers, json={})
    print(r.json())
    ```

    ```go Go theme={null}
    package main

    import (
    	"bytes"
    	"net/http"
    	"os"
    )

    func main() {
    	req, _ := http.NewRequest("POST", "https://api.orbit.devotel.io/api/v1/ussd/simulate", bytes.NewBuffer([]byte(`{}`)))
    	req.Header.Set("X-API-Key", os.Getenv("ORBIT_API_KEY"))
    	req.Header.Set("Content-Type", "application/json")
    	http.DefaultClient.Do(req)
    }
    ```

    ```ruby Ruby theme={null}
    require 'net/http'
    require 'json'

    uri = URI('https://api.orbit.devotel.io/api/v1/ussd/simulate')
    req = Net::HTTP::Post.new(uri)
    req['X-API-Key'] = ENV['ORBIT_API_KEY']
    req['Content-Type'] = 'application/json'
    req.body = {}.to_json
    res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |h| h.request(req) }
    puts res.body
    ```

    ```php PHP theme={null}
    <?php
    $ch = curl_init('https://api.orbit.devotel.io/api/v1/ussd/simulate');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
      'X-API-Key: ' . getenv('ORBIT_API_KEY'),
      'Content-Type: application/json',
    ]);
    curl_setopt($ch, CURLOPT_POSTFIELDS, <<<JSON
    {}
    JSON);
    echo curl_exec($ch);
    ```
  </CodeGroup>
</RequestExample>

***

### Create or replace the USSD menu

<Note>
  `PUT /api/v1/ussd/menu`
</Note>

Validates and persists the tenant's USSD menu definition. The menu tree is checked for unique node ids and that `root` plus every option `next` resolves to an existing node. Replaces any previously configured menu.

<RequestExample>
  <CodeGroup>
    ```bash cURL theme={null}
    curl -X PUT "https://api.orbit.devotel.io/api/v1/ussd/menu" \
      -H "X-API-Key: dv_live_sk_your_key_here" \
      -H "Content-Type: application/json" \
      -d '{}'
    ```

    ```typescript Node.js theme={null}
    import { Orbit } from '@devotel-orbit/node'

    const orbit = new Orbit({
      apiKey: process.env.ORBIT_API_KEY!,
    })

    const res = await fetch('https://api.orbit.devotel.io/api/v1/ussd/menu', {
      method: 'PUT',
      headers: {
        'X-API-Key': process.env.ORBIT_API_KEY!,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({}),
    })
    console.log(await res.json())
    ```

    ```python Python theme={null}
    import os, requests

    headers = {"X-API-Key": os.environ["ORBIT_API_KEY"]}
    headers["Content-Type"] = "application/json"
    r = requests.put("https://api.orbit.devotel.io/api/v1/ussd/menu", headers=headers, json={})
    print(r.json())
    ```

    ```go Go theme={null}
    package main

    import (
    	"bytes"
    	"net/http"
    	"os"
    )

    func main() {
    	req, _ := http.NewRequest("PUT", "https://api.orbit.devotel.io/api/v1/ussd/menu", bytes.NewBuffer([]byte(`{}`)))
    	req.Header.Set("X-API-Key", os.Getenv("ORBIT_API_KEY"))
    	req.Header.Set("Content-Type", "application/json")
    	http.DefaultClient.Do(req)
    }
    ```

    ```ruby Ruby theme={null}
    require 'net/http'
    require 'json'

    uri = URI('https://api.orbit.devotel.io/api/v1/ussd/menu')
    req = Net::HTTP::Put.new(uri)
    req['X-API-Key'] = ENV['ORBIT_API_KEY']
    req['Content-Type'] = 'application/json'
    req.body = {}.to_json
    res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |h| h.request(req) }
    puts res.body
    ```

    ```php PHP theme={null}
    <?php
    $ch = curl_init('https://api.orbit.devotel.io/api/v1/ussd/menu');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
      'X-API-Key: ' . getenv('ORBIT_API_KEY'),
      'Content-Type: application/json',
    ]);
    curl_setopt($ch, CURLOPT_POSTFIELDS, <<<JSON
    {}
    JSON);
    echo curl_exec($ch);
    ```
  </CodeGroup>
</RequestExample>

***