Introduction

Welcome to the Xosum.am API. This API lets you transcribe Armenian audio files end-to-end: create a job, upload an .mp3, and receive the transcript either pushed to a webhook you host or pulled via polling.

API access is exclusive to Business-plan customers. Don’t have access yet? Request it here and we’ll be in touch.

🌐 Base URL

All API endpoints are served from a single base URL:

https://app.xosum.am

Combine this with the path of any endpoint to get the full URL. For example:

Endpoint	Full URL
`POST /api/createTranscription`	`https://app.xosum.am/api/createTranscription`
`GET /api/getTranscription`	`https://app.xosum.am/api/getTranscription?docId=...`

The “Try it” buttons in the API Reference automatically use this base URL — just paste your API key and click send.

🔐 Authentication

To use the API you need:

A Business plan account at app.xosum.am. If you don’t have one yet, request access.
A Bearer API key, generated from your account settings.

That’s the minimum. You also need to decide how you want to receive transcription results:

Webhook (push) — set a webhookURL and webhookSecret in your account. Xosum will POST the transcript to your URL when it’s ready. Lower latency, but you must host a publicly reachable endpoint.
Polling (pull) — no webhook setup needed. Poll GET /api/getTranscription until the job is done. Simpler when you can’t expose a public receiver (e.g. you’re behind Cloudflare with strict IP-whitelisting requirements).

You can switch between the two at any time without re-creating keys.

🛠️ Create a Transcription Job

`POST https://app.xosum.am/api/createTranscription`

This endpoint generates a signed upload URL and a docId you’ll use to track the job.

Required Headers

Authorization: Bearer YOUR_API_KEY

Required JSON Body

{
  "type": "single_voice",
  "metadata": {
    "custom_key": "optional metadata"
  }
}

The type field is required and also controls how the resulting transcript is shaped:

single_voice → plain transcript, no speaker labels. Use for monologues, dictations, single-speaker recordings.
phone_call → diarized transcript with inline Խոսնակ 1: / Խոսնակ 2: speaker labels, pinned to exactly two speakers. Use for two-party conversations.

Example cURL Request

curl -X POST https://app.xosum.am/api/createTranscription \
  -H "Authorization: Bearer xosum_abcdef123456" \
  -H "Content-Type: application/json" \
  -d '{
        "type": "single_voice",
        "metadata": { "filename": "interview1" }
      }'

Sample Successful Response

{
  "docId": "XYZ123",
  "uploadUrl": "https://storage.googleapis.com/..."
}

The uploadUrl is a pre-signed URL valid for 1 hour. Upload your file within that window.

🎧 Upload the Audio File

Use a PUT request to upload your MP3 file to the uploadUrl.

curl -X PUT -T ./my-audio.mp3 "https://storage.googleapis.com/..."

Upload must be an MP3 file. Other formats like WAV/M4A are not supported via the API.

📬 Option A — Receive the Transcript via Webhook

Once the audio is transcribed, Xosum sends a POST to your webhook URL (the one you configured at app.xosum.am). The path /your-webhook-url referenced in the API reference is just a placeholder — Xosum does not host this endpoint, you do.

Sample Webhook Payload

{
  "event_type": "transcript_ready",
  "secret": "your_webhook_secret",
  "docId": "XYZ123",
  "transcription": "Սա վերծանված տեքստն է",
  "metadata": { "filename": "interview1" },
  "title": "...",
  "resolution": "...",
  "link": "https://app.xosum.am/recording-details/XYZ123"
}

Your endpoint should:

Validate the secret matches what you configured, and reject otherwise.
Return 200 OK quickly — process asynchronously if needed.
Be prepared for two possible content shapes in transcription: plain text for single_voice, or diarized text with Խոսնակ N: labels for phone_call. The JSON envelope is identical; only the text content differs.

There are no automatic retries from Xosum’s side, so if your endpoint is down when the webhook fires you’ll need to fall back to the polling endpoint below to recover the transcript.

🔄 Option B — Poll for the Transcript

If you can’t host a public webhook receiver, poll GET /api/getTranscription?docId=... until status becomes transcribed or failed.

curl -H "Authorization: Bearer $XOSUM_API_KEY" \
  "https://app.xosum.am/api/getTranscription?docId=XYZ123"

Sample response while still processing:

{
  "docId": "XYZ123",
  "status": "processing",
  "createdAt": "2026-05-17T16:22:23.892Z",
  "type": "single_voice",
  "duration": null,
  "metadata": { "filename": "interview1" }
}

Sample response once complete:

{
  "docId": "XYZ123",
  "status": "transcribed",
  "createdAt": "2026-05-17T16:22:23.892Z",
  "type": "single_voice",
  "duration": 62,
  "metadata": { "filename": "interview1" },
  "transcription": "Սա վերծանված տեքստն է",
  "title": "...",
  "resolution": "...",
  "languageCode": "hy-AM"
}

Polling rules to follow

Cadence: every 5–10 seconds per in-flight job is the sweet spot. Most single_voice jobs finish in seconds; phone_call jobs may take a few minutes.
Rate limit: 60 requests / minute / API key, fixed wall-clock-minute window (counter resets at the top of each minute, not as a rolling window).
On 429: the response includes a Retry-After header (seconds until the next window opens). Sleep at least that long before retrying.
Stop polling once status is transcribed or failed — these are terminal.
Cross-tenant safety: if you ask about a docId that doesn’t belong to your API key, you’ll get a 404 (not 403) — the same response as a docId that doesn’t exist at all. This is intentional and you don’t need to handle it specially.

See the full Get Transcription reference for every response field and error code.

📚 Notes & Constraints

Item	Value
File format	MP3 only (other formats are rejected)
Upload URL validity	1 hour from job creation
Max duration	Limited by your account’s remaining seconds
Languages	Armenian (`hy-AM`)
Transcription latency	Seconds (`single_voice`) to a few minutes (`phone_call`)
Polling rate limit	60 requests/minute per API key (fixed window)
Webhook retries	None — implement idempotent handling on your side; fall back to polling if your receiver was down

💻 End-to-End Code Examples

Python (requests)

import os, time, requests

API_KEY = os.environ["XOSUM_API_KEY"]
BASE = "https://app.xosum.am/api"
HEADERS = {"Authorization": f"Bearer {API_KEY}"}

# 1. Create the job
r = requests.post(
    f"{BASE}/createTranscription",
    json={"type": "single_voice", "metadata": {"filename": "my-audio.mp3"}},
    headers=HEADERS,
)
r.raise_for_status()
job = r.json()
doc_id, upload_url = job["docId"], job["uploadUrl"]

# 2. Upload the audio
with open("my-audio.mp3", "rb") as f:
    requests.put(upload_url, data=f).raise_for_status()

# 3. Poll for the result
while True:
    r = requests.get(f"{BASE}/getTranscription", params={"docId": doc_id}, headers=HEADERS)
    if r.status_code == 429:
        time.sleep(int(r.headers.get("Retry-After", "5")))
        continue
    r.raise_for_status()
    body = r.json()
    if body["status"] == "transcribed":
        print(body["transcription"])
        break
    if body["status"] == "failed":
        raise RuntimeError(body.get("error", "Unknown error"))
    time.sleep(7)

Node.js (axios)

import axios from "axios";
import fs from "node:fs";

const API_KEY = process.env.XOSUM_API_KEY;
const BASE = "https://app.xosum.am/api";
const headers = { Authorization: `Bearer ${API_KEY}` };
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

// 1. Create the job
const { data: job } = await axios.post(
  `${BASE}/createTranscription`,
  { type: "single_voice", metadata: { filename: "my-audio.mp3" } },
  { headers }
);

// 2. Upload the audio
await axios.put(job.uploadUrl, fs.readFileSync("./my-audio.mp3"));

// 3. Poll for the result
while (true) {
  try {
    const { data } = await axios.get(`${BASE}/getTranscription`, {
      params: { docId: job.docId },
      headers,
    });
    if (data.status === "transcribed") {
      console.log(data.transcription);
      break;
    }
    if (data.status === "failed") {
      throw new Error(data.error ?? "Unknown error");
    }
  } catch (err) {
    if (err.response?.status === 429) {
      await sleep(Number(err.response.headers["retry-after"] ?? 5) * 1000);
      continue;
    }
    throw err;
  }
  await sleep(7000);
}

🧪 Testing

Use Postman or curl to simulate requests.
For webhook testing, set a development URL like webhook.site so you can inspect inbound payloads without standing up infrastructure.
For polling, the recommended approach is to use the example loops above against a small test recording — the round-trip on a short single_voice clip is typically just a few seconds.

📞 Need Help?

Don’t have API access yet? Request it here.
Already a customer with a question? Email support@xosum.am or visit the docs.

Overview

Endpoints

Webhooks (you host these)

🌐 Base URL

🔐 Authentication

🛠️ Create a Transcription Job

`POST https://app.xosum.am/api/createTranscription`

Required Headers

Required JSON Body

Example cURL Request

Sample Successful Response

🎧 Upload the Audio File

📬 Option A — Receive the Transcript via Webhook

Sample Webhook Payload

🔄 Option B — Poll for the Transcript

Polling rules to follow

📚 Notes & Constraints

💻 End-to-End Code Examples

Python (requests)

Node.js (axios)

🧪 Testing

📞 Need Help?

​🌐 Base URL

​🔐 Authentication

​🛠️ Create a Transcription Job

​POST https://app.xosum.am/api/createTranscription

​Required Headers

​Required JSON Body

​Example cURL Request

​Sample Successful Response

​🎧 Upload the Audio File

​📬 Option A — Receive the Transcript via Webhook

​Sample Webhook Payload

​🔄 Option B — Poll for the Transcript

​Polling rules to follow

​📚 Notes & Constraints

​💻 End-to-End Code Examples

​Python (requests)

​Node.js (axios)

​🧪 Testing

​📞 Need Help?

🌐 Base URL

🔐 Authentication

🛠️ Create a Transcription Job

`POST https://app.xosum.am/api/createTranscription`

Required Headers

Required JSON Body

Example cURL Request

Sample Successful Response

🎧 Upload the Audio File

📬 Option A — Receive the Transcript via Webhook

Sample Webhook Payload

🔄 Option B — Poll for the Transcript

Polling rules to follow

📚 Notes & Constraints

💻 End-to-End Code Examples

Python (requests)

Node.js (axios)

🧪 Testing

📞 Need Help?