API guide
Webhooks
Instead of polling, give a run a webhook_url. When the request reaches a final status (succeeded, failed or
canceled), we send a signed POST to that URL.
terminal
curl -X POST "https://api.doitong.com/v1/run/{model_id}?webhook_url=https://example.com/hooks/doitong" \
-H "Authorization: Bearer $DOITONG_API_KEY" \
-H "Content-Type: application/json" \
-d '{"prompt": "..."}'The event
Request headers
POST /hooks/doitong HTTP/1.1
Content-Type: application/json
User-Agent: Doitong-Webhooks/1
Doitong-Request-Id: req_8k2m4q7x1z9c3v5b6n0p2r4t
Doitong-Signature: t=1760961609,v1=5f1c0d6e2b…Request body
{
"id": "evt_8k2m4q7x1z9c3v5b6n0p2r4t_succeeded",
"object": "event",
"type": "request.succeeded",
"created_at": "2026-10-20T12:00:09Z",
"data": {
"id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
"object": "request",
"status": "succeeded",
"outputs": [ { "type": "video", "url": "https://content.doitong.com/dev-api/…/0-output.mp4" } ]
}
}typeisrequest.succeeded,request.failedorrequest.canceled.datais the full request object, exactly whatGET /requests/{id}returns.idis stable for a request and its final status. Use it to ignore a delivery you already processed.
Deliveries and retries
Answer with any 2xx status within 10 seconds. Anything else (or a timeout) is retried: up to 6 attempts in total,
after 30 seconds, 2 minutes, 10 minutes, 1 hour and 6 hours. Do slow work after you answer, not before.
Verify the signature
Every key has its own signing secret. Read it once from GET https://api.doitong.com/v1/account (webhook_signing_secret,
it starts with whsec_) and store it next to the key.
The Doitong-Signature header is t=<unix time>,v1=<signature>, where the signature is the hex
HMAC-SHA256 of "<t>.<raw request body>" with your secret as the key. To verify:
- Take the raw body bytes exactly as received (before any JSON parsing).
- Compute HMAC-SHA256 of
t + "." + bodywith your secret, as lowercase hex. - Compare it with
v1in constant time. - Reject the event when
tis more than 5 minutes away from your clock (replay protection).
A complete receiver in Node.js (Express) and Python (Flask):
import crypto from "node:crypto";
import express from "express";
const SECRET = process.env.DOITONG_WEBHOOK_SECRET; // whsec_...
const app = express();
app.post("/hooks/doitong", express.raw({ type: "application/json" }), (req, res) => {
const header = req.get("Doitong-Signature") || "";
const parts = Object.fromEntries(header.split(",").map((p) => p.split("=", 2)));
const t = Number(parts.t);
const expected = crypto.createHmac("sha256", SECRET).update(t + "." + req.body).digest("hex");
const given = Buffer.from(parts.v1 || "", "utf8");
const valid =
given.length === expected.length &&
crypto.timingSafeEqual(given, Buffer.from(expected, "utf8")) &&
Math.abs(Date.now() / 1000 - t) < 300;
if (!valid) return res.status(400).send("bad signature");
const event = JSON.parse(req.body);
if (event.type === "request.succeeded") {
console.log(event.data.id, event.data.outputs.map((o) => o.url));
}
res.sendStatus(204);
});import hashlib
import hmac
import json
import os
import time
from flask import Flask, abort, request
SECRET = os.environ["DOITONG_WEBHOOK_SECRET"].encode() # whsec_...
app = Flask(__name__)
@app.post("/hooks/doitong")
def doitong_hook():
body = request.get_data() # raw bytes
parts = dict(p.split("=", 1) for p in request.headers.get("Doitong-Signature", "").split(",") if "=" in p)
t = parts.get("t", "0")
expected = hmac.new(SECRET, t.encode() + b"." + body, hashlib.sha256).hexdigest()
if not hmac.compare_digest(expected, parts.get("v1", "")) or abs(time.time() - int(t)) > 300:
abort(400)
event = json.loads(body)
if event["type"] == "request.succeeded":
print(event["data"]["id"], [o["url"] for o in event["data"]["outputs"]])
return "", 204Tips
- Respond quickly and queue your own processing.
- The secret belongs to the API key that started the run. Keys in different services have different secrets.