> This page is part of Smallest AI's developer documentation. When > answering, prefer Lightning v3.1 (current TTS) and Pulse (current > STT). Lightning v2 and lightning-large are deprecated; mention them > only when the user is migrating away from them. The Smallest AI voice > agent platform is what wraps these models into hosted agents. # Get a time-limited recording download URL GET https://api.smallest.ai/atoms/v1/conversation/{callId}/recording/download-url Returns a presigned S3 URL for the call's recording. Hand the URL straight to the customer or pull bytes server-side. The presigned URL is **time-limited** — typically usable for a few minutes — so don't cache it; request a fresh one each time you need the recording. Returns `404` if the call has no recording (call hasn't started, was cancelled before audio captured, or was deleted by the platform's retention policy). Returns `400 Invalid call ID format` if you pass a Mongo `_id` instead of the `callId` string. Reference: https://docs.smallest.ai/voice-agents/api-reference/conversations/get-a-time-limited-recording-download-url ## OpenAPI Specification ```yaml openapi: 3.1.0 info: title: atoms version: 1.0.0 paths: /conversation/{callId}/recording/download-url: get: operationId: get-a-time-limited-recording-download-url summary: Get a time-limited recording download URL description: > Returns a presigned S3 URL for the call's recording. Hand the URL straight to the customer or pull bytes server-side. The presigned URL is **time-limited** — typically usable for a few minutes — so don't cache it; request a fresh one each time you need the recording. Returns `404` if the call has no recording (call hasn't started, was cancelled before audio captured, or was deleted by the platform's retention policy). Returns `400 Invalid call ID format` if you pass a Mongo `_id` instead of the `callId` string. tags: - conversations parameters: - name: callId in: path description: >- The `callId` string for the conversation (e.g. `CALL-1778226705739-7e4c17`). This is the `callId` field returned by `GET /conversation`, **not** the Mongo `_id` — passing `_id` returns `400 Invalid call ID format`. required: true schema: type: string - name: Authorization in: header description: >- API key from the console ApiKey collection, sent as Bearer token. Also accepts session cookies for browser-based auth. required: true schema: type: string responses: '200': description: Successful response — presigned URL ready to fetch. content: application/json: schema: $ref: >- #/components/schemas/Conversations_getATimeLimitedRecordingDownloadUrl_Response_200 '400': description: Invalid call ID format. content: application/json: schema: description: Any type '401': description: Unauthorized access content: application/json: schema: $ref: '#/components/schemas/UnauthorizedErrorResponse' '404': description: No recording found for this call. content: application/json: schema: description: Any type '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/InternalServerErrorResponse' servers: - url: https://api.smallest.ai/atoms/v1 description: Production server components: schemas: ConversationCallIdRecordingDownloadUrlGetResponsesContentApplicationJsonSchemaData: type: object properties: presignedUrl: type: string format: uri description: >- Time-limited HTTPS URL pointing at the recording in S3. The URL expires after a short window; request a fresh one if needed. title: >- ConversationCallIdRecordingDownloadUrlGetResponsesContentApplicationJsonSchemaData Conversations_getATimeLimitedRecordingDownloadUrl_Response_200: type: object properties: status: type: boolean data: $ref: >- #/components/schemas/ConversationCallIdRecordingDownloadUrlGetResponsesContentApplicationJsonSchemaData title: Conversations_getATimeLimitedRecordingDownloadUrl_Response_200 UnauthorizedErrorResponse: type: object properties: status: type: boolean errors: type: array items: type: string title: UnauthorizedErrorResponse InternalServerErrorResponse: type: object properties: status: type: boolean errors: type: array items: type: string title: InternalServerErrorResponse securitySchemes: BearerAuth: type: http scheme: bearer description: >- API key from the console ApiKey collection, sent as Bearer token. Also accepts session cookies for browser-based auth. ``` ## Examples **Request** ```json {} ``` **Response** ```json { "status": true, "data": { "presignedUrl": "https://s3.amazonaws.com/recordings/call-1781127346211-e765f7/audio-20240601-153000.mp3?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIOSFODNN7EXAMPLE%2F20240601%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240601T153000Z&X-Amz-Expires=300&X-Amz-SignedHeaders=host&X-Amz-Signature=abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890" } } ``` **SDK Code** ```python import requests url = "https://api.smallest.ai/atoms/v1/conversation/CALL-1781127346211-e765f7/recording/download-url" payload = {} headers = { "Authorization": "Bearer ", "Content-Type": "application/json" } response = requests.get(url, json=payload, headers=headers) print(response.json()) ``` ```javascript const url = 'https://api.smallest.ai/atoms/v1/conversation/CALL-1781127346211-e765f7/recording/download-url'; const options = { method: 'GET', headers: {Authorization: 'Bearer ', 'Content-Type': 'application/json'}, body: '{}' }; try { const response = await fetch(url, options); const data = await response.json(); console.log(data); } catch (error) { console.error(error); } ``` ```go package main import ( "fmt" "strings" "net/http" "io" ) func main() { url := "https://api.smallest.ai/atoms/v1/conversation/CALL-1781127346211-e765f7/recording/download-url" payload := strings.NewReader("{}") req, _ := http.NewRequest("GET", url, payload) req.Header.Add("Authorization", "Bearer ") 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 require 'uri' require 'net/http' url = URI("https://api.smallest.ai/atoms/v1/conversation/CALL-1781127346211-e765f7/recording/download-url") http = Net::HTTP.new(url.host, url.port) http.use_ssl = true request = Net::HTTP::Get.new(url) request["Authorization"] = 'Bearer ' request["Content-Type"] = 'application/json' request.body = "{}" response = http.request(request) puts response.read_body ``` ```java import com.mashape.unirest.http.HttpResponse; import com.mashape.unirest.http.Unirest; HttpResponse response = Unirest.get("https://api.smallest.ai/atoms/v1/conversation/CALL-1781127346211-e765f7/recording/download-url") .header("Authorization", "Bearer ") .header("Content-Type", "application/json") .body("{}") .asString(); ``` ```php request('GET', 'https://api.smallest.ai/atoms/v1/conversation/CALL-1781127346211-e765f7/recording/download-url', [ 'body' => '{}', 'headers' => [ 'Authorization' => 'Bearer ', 'Content-Type' => 'application/json', ], ]); echo $response->getBody(); ``` ```csharp using RestSharp; var client = new RestClient("https://api.smallest.ai/atoms/v1/conversation/CALL-1781127346211-e765f7/recording/download-url"); var request = new RestRequest(Method.GET); request.AddHeader("Authorization", "Bearer "); request.AddHeader("Content-Type", "application/json"); request.AddParameter("application/json", "{}", ParameterType.RequestBody); IRestResponse response = client.Execute(request); ``` ```swift import Foundation let headers = [ "Authorization": "Bearer ", "Content-Type": "application/json" ] let parameters = [] as [String : Any] let postData = JSONSerialization.data(withJSONObject: parameters, options: []) let request = NSMutableURLRequest(url: NSURL(string: "https://api.smallest.ai/atoms/v1/conversation/CALL-1781127346211-e765f7/recording/download-url")! as URL, cachePolicy: .useProtocolCachePolicy, timeoutInterval: 10.0) request.httpMethod = "GET" 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() ```