Krea's newest model, with a step that plans the picture first
- Up to 8 reference images
- 10 aspect ratios
- Create Image
- Edit Image
Call it with the model name krea/3/edit on POST /jobs/createTask, from 11 credits per image ($0.11).
krea/3/editPOST https://api.popnow.ai/api/v1/jobs/createTask# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $IDEMPOTENCY_KEY" \
-d '{
"model": "krea/3/edit",
"input": {
"prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
"image_urls": [
"https://media.popnow.ai/influencer/examples/marco.webp"
],
"aspect_ratio": "1:1",
"quality": "high",
"output_format": "png"
}
}'
# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
-H "Authorization: Bearer $POPNOW_API_KEY"// Node 18+ (or any runtime with fetch). Keep the API key on your server.
const BASE = "https://api.popnow.ai/api/v1";
const headers = { Authorization: `Bearer ${process.env.POPNOW_API_KEY}` };
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
async function call(path, init = {}) {
const res = await fetch(BASE + path, { ...init, headers: { ...headers, ...init.headers } });
const body = await res.json();
if (body.code !== 200) throw new Error(`${body.code} ${body.msg}`);
return body.data;
}
const { taskId } = await call("/jobs/createTask", {
method: "POST",
headers: { "Content-Type": "application/json", "Idempotency-Key": crypto.randomUUID() },
body: JSON.stringify({
"model": "krea/3/edit",
"input": {
"prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
"image_urls": [
"https://media.popnow.ai/influencer/examples/marco.webp"
],
"aspect_ratio": "1:1",
"quality": "high",
"output_format": "png"
}
}),
});
// Poll with backoff. A finished task may still be copying files: wait while an asset is pending.
let task;
for (let delay = 2000; ; delay = Math.min(delay * 1.5, 15000)) {
await sleep(delay);
task = await call(`/jobs/recordInfo?taskId=${taskId}`);
const copying = (task.output?.assets ?? []).some((a) => a.pending && !a.unavailable);
if (["succeeded", "failed", "canceled", "expired"].includes(task.state) && !copying) break;
}
if (task.state !== "succeeded") throw new Error(`${task.state}: ${task.errorMessage ?? "no detail"}`);
// Each asset has a signed url (no API key needed) that expires at expiresAt: save the file.
for (const asset of task.output.assets) console.log(asset.url);import os, time, uuid, requests
BASE = "https://api.popnow.ai/api/v1"
HEADERS = {"Authorization": f"Bearer {os.environ['POPNOW_API_KEY']}"}
def call(method, path, **kwargs):
body = requests.request(method, BASE + path, headers={**HEADERS, **kwargs.pop("headers", {})}, timeout=30, **kwargs).json()
if body["code"] != 200:
raise RuntimeError(f'{body["code"]} {body["msg"]}')
return body["data"]
task_id = call(
"POST",
"/jobs/createTask",
headers={"Idempotency-Key": str(uuid.uuid4())}, # reuse it if you retry
json={
"model": "krea/3/edit",
"input": {
"prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
"image_urls": [
"https://media.popnow.ai/influencer/examples/marco.webp"
],
"aspect_ratio": "1:1",
"quality": "high",
"output_format": "png"
}
},
)["taskId"]
# Poll with backoff. A finished task may still be copying files: wait while an asset is pending.
delay = 2.0
while True:
time.sleep(delay)
task = call("GET", "/jobs/recordInfo", params={"taskId": task_id})
assets = (task.get("output") or {}).get("assets") or []
copying = any(a.get("pending") and not a.get("unavailable") for a in assets)
if task["state"] in ("succeeded", "failed", "canceled", "expired") and not copying:
break
delay = min(delay * 1.5, 15.0)
if task["state"] != "succeeded":
raise RuntimeError(f'{task["state"]}: {task.get("errorMessage", "no detail")}')
# Each asset has a signed url (no API key needed) that expires at expiresAt: save the file.
for asset in assets:
print(asset["url"])The input is built from the schema below, so it passes validation as written. Change the prompt and links to your own.
Price
| Option | Credits per image | ≈ USD |
|---|---|---|
| Standard | 10.8 | $0.11 |
1 credit = $0.01 · Every option and its price: GET /models/krea/3/edit
Each task is rounded up to whole credits, so one run at the lowest tier costs 11 credits per image ($0.11).
Limits
- Aspect ratios
- 1:1 · 4:5 · 3:4 · 2:3 · 9:16 · 5:4 +4
- Reference images
- 8
- Prompt length (characters)
- 5,000
- Largest upload
- 10 MB
Parameters
These fields come from the same schema we check every request against. Fields that are not listed are rejected.
promptstringRequiredSay what to change and what stays the same. Refer to sources as image 1, image 2 and so on.
image_urlsarray<string>RequiredChanges the pricePhotos to edit or combine. Say in the prompt what each one adds.
aspect_ratiostringOptionalThe shape of the frame: wide, square or tall.
qualitystringOptionalTrades speed and price for finer detail.
enable_thinkingbooleanOptionalSpend longer planning the prompt before drawing. Same price.
negative_promptstringOptionalThings you don't want to see.
output_formatstringOptionalFile type of the result.
seedintegerOptionalReuse the same number to get a repeatable result.
Raw JSON Schema
{
"additionalProperties": false,
"properties": {
"aspect_ratio": {
"default": "1:1",
"description": "Output aspect ratio.",
"enum": [
"1:1",
"4:5",
"3:4",
"2:3",
"9:16",
"5:4",
"4:3",
"3:2",
"16:9",
"21:9"
],
"type": "string"
},
"enable_thinking": {
"default": false,
"description": "Spend longer planning the prompt before drawing. Same price.",
"type": "boolean"
},
"image_urls": {
"description": "One to eight source images, in the order your prompt refers to them. Each one adds to the price.",
"items": {
"contentMediaType": [
"image/jpeg",
"image/png",
"image/webp",
"image/gif"
],
"format": "uri",
"minLength": 1,
"type": "string"
},
"maxItems": 8,
"minItems": 1,
"type": "array"
},
"negative_prompt": {
"description": "What to keep out of the image. Used by the high-quality variant only.",
"maxLength": 1024,
"type": "string"
},
"output_format": {
"default": "png",
"description": "File format of the result.",
"enum": [
"png",
"jpeg"
],
"type": "string"
},
"prompt": {
"description": "Say what to change and what stays the same. Refer to sources as image 1, image 2 and so on.",
"maxLength": 5000,
"minLength": 1,
"type": "string"
},
"quality": {
"default": "high",
"description": "High favours image quality; fast returns sooner. Same price.",
"enum": [
"high",
"fast"
],
"type": "string"
},
"seed": {
"description": "Random seed. Reusing one does not guarantee an identical image.",
"maximum": 2147483647,
"minimum": 0,
"type": "integer"
}
},
"required": [
"prompt",
"image_urls"
],
"type": "object"
}Responses, polling and callbacks
Every model works the same way: create a task, then poll it or wait for a callback.
Price it first
curl -X POST https://api.popnow.ai/api/v1/jobs/quote \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "krea/3/edit",
"input": {
"prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
"image_urls": [
"https://media.popnow.ai/influencer/examples/marco.webp"
],
"aspect_ratio": "1:1",
"quality": "high",
"output_format": "png"
}
}'Same body as createTask. It returns the expected and the highest possible charge, and runs nothing.
Accepted
HTTP/1.1 202 Accepted
{
"code": 200,
"msg": "success",
"data": {
"taskId": "task_01k3m8x9q2z4v7n5p6r8s0t1w3",
"state": "queued"
},
"request_id": "req_example_create"
}HTTP 202 means the task was accepted and the credits are held, not charged yet. The final charge never goes above the hold.
Check status
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
-H "Authorization: Bearer $POPNOW_API_KEY"Poll every few seconds with backoff and stop once state is succeeded, failed, canceled or expired.
Finished task
{
"code": 200,
"msg": "success",
"data": {
"taskId": "task_01k3m8x9q2z4v7n5p6r8s0t1w3",
"model": "krea/3/edit",
"state": "succeeded",
"output": {
"assets": [
{
"url": "https://cdn.popnow.ai/tasks/task_01k3m8x9q2z4v7n5p6r8s0t1w3/output.png?signature=FROM_RESPONSE",
"expiresAt": "2026-10-17T12:20:00Z",
"mime": "image/png",
"width": 1024,
"height": 1024
}
]
},
"settled": true
},
"request_id": "req_example_record"
}Download from url before expiresAt. Need a fresh link later? Ask POST /common/download-url.
Verify a callback
import { createHash, createHmac, timingSafeEqual } from "node:crypto";
import express from "express";
const app = express();
// express.raw keeps the exact bytes that were signed; express.json would not match.
app.post("/hooks/popnow", express.raw({ type: "application/json" }), (req, res) => {
const timestamp = req.header("X-Webhook-Timestamp");
const signature = req.header("X-Webhook-Signature") ?? "";
const body = JSON.parse(req.body.toString("utf8"));
const taskId = body.data?.taskId ?? body.task_id;
const digest = createHash("sha256").update(req.body).digest("hex");
const expected = createHmac("sha256", process.env.POPNOW_WEBHOOK_SECRET)
.update(`${taskId}.${timestamp}.${digest}`)
.digest("base64");
const ok = expected.length === signature.length && timingSafeEqual(Buffer.from(expected), Buffer.from(signature));
// Check the signature first, then reject anything older than five minutes.
if (!ok || Math.abs(Date.now() / 1000 - Number(timestamp)) > 300) return res.status(401).end();
res.status(200).end(); // answer fast, then fetch the task and store its files
});With callBackUrl set, we post the finished task to you. Check the signature against the raw body before you trust it.
Send a local file
curl -X POST https://api.popnow.ai/api/v1/common/upload-url \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-d '{"contentType": "image/png", "bytes": 482113}'
# PUT the file bytes to data.uploadUrl with every header in data.headers, then commit it:
curl -X POST https://api.popnow.ai/api/v1/files/$FILE_ID/commit \
-H "Authorization: Bearer $POPNOW_API_KEY"
# The commit returns a popnow://f/... reference. Put it in any image, video or
# audio field of the task input instead of a public https URL.Public https links work as they are. Local files go through upload-url and commit first.