Tripo H3.1 API
by TripoAccurate 3D shapes and true colors from one product photo
- Image to 3D
Call it with the model name tripo/h3.1/image-to-3d on POST /jobs/createTask, from $0.432.
tripo/h3.1/image-to-3dPOST https://api.popnow.ai/api/v1/jobs/createTask# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(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: $IDEMPOTENCY_KEY" \
-d '{
"model": "tripo/h3.1/image-to-3d",
"input": {
"image_url": "https://media.popnow.ai/influencer/examples/marco.webp",
"generate_texture": true,
"generate_pbr": true,
"texture_quality": "standard",
"geometry_quality": "standard",
"model_orientation": "default"
}
}'
# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$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} ${body.msg}`);
return body.data;
}
const { taskId } = await call("/jobs/createTask", {
method: "POST",
headers: { "Content-Type": "application/json", "Idempotency-Key": crypto.randomUUID() },
body: JSON.stringify({
"model": "tripo/h3.1/image-to-3d",
"input": {
"image_url": "https://media.popnow.ai/influencer/examples/marco.webp",
"generate_texture": true,
"generate_pbr": true,
"texture_quality": "standard",
"geometry_quality": "standard",
"model_orientation": "default"
}
}),
});
// Poll with backoff. A finished task may still be copying files: wait while an asset is pending.
let task;
for (let delay = 2000; ; delay = Math.min(delay * 1.5, 15000)) {
await sleep(delay);
task = await call(`/jobs/recordInfo?taskId=${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": "tripo/h3.1/image-to-3d",
"input": {
"image_url": "https://media.popnow.ai/influencer/examples/marco.webp",
"generate_texture": True,
"generate_pbr": True,
"texture_quality": "standard",
"geometry_quality": "standard",
"model_orientation": "default"
}
},
)["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 | USD per run |
|---|---|
| Standard | $0.432 |
Billed in USD · Every option and its price: GET /models/tripo/h3.1/image-to-3d
Limits
- Largest upload
- 10 MB
Parameters
These fields come from the same schema we check every request against. Fields that are not listed are rejected.
image_urlstringRequiredThe picture to start from.
generate_texturebooleanOptionalChanges the pricePaint a texture onto the mesh. On by default; turning it off only removes texturing if generate_pbr is off too.
generate_pbrbooleanOptionalChanges the priceAdd PBR material maps (metal-roughness and normal). On by default and switches texturing on.
texture_qualitystringOptionalChanges the priceTexture resolution: standard (the default) or detailed. detailed costs more and only applies to textured meshes.
geometry_qualitystringOptionalChanges the priceGeometry detail: standard (the default) or detailed. detailed builds finer surface detail and costs more.
quad_meshbooleanOptionalChanges the priceReturn four-sided (quad) polygons instead of triangles, for editing in modelling tools; the file then comes back as FBX instead of GLB. Off by default; adds to the price.
face_limitintegerOptionalTarget face count, 1,000 to 2,000,000. Leave empty to let the model decide (often over a million faces). Does not change the price.
model_orientationstringOptionaldefault keeps the standard orientation; align_image rotates the model to match the picture.
texture_alignmentstringOptionalAlign the texture to the original picture (the default) or to the generated geometry.
auto_sizebooleanOptionalScale the mesh to estimated real-world dimensions. Off by default.
seedintegerOptionalUse the same seed and settings for more controlled comparisons.
texture_seedintegerOptionalSeed for the texture step. Keep seed fixed and change this to try new textures on the same shape.
Raw JSON Schema
{
"additionalProperties": false,
"properties": {
"auto_size": {
"default": false,
"description": "Scale the mesh to estimated real-world dimensions. Off by default.",
"type": "boolean"
},
"face_limit": {
"description": "Target face count, 1,000 to 2,000,000. Leave empty to let the model decide (often over a million faces). Does not change the price.",
"maximum": 2000000,
"minimum": 1000,
"type": "integer"
},
"generate_pbr": {
"default": true,
"description": "Add PBR material maps (metal-roughness and normal). On by default and switches texturing on.",
"type": "boolean"
},
"generate_texture": {
"default": true,
"description": "Paint a texture onto the mesh. On by default; turning it off only removes texturing if generate_pbr is off too.",
"type": "boolean"
},
"geometry_quality": {
"default": "standard",
"description": "Geometry detail: standard (the default) or detailed. detailed builds finer surface detail and costs more.",
"enum": [
"standard",
"detailed"
],
"type": "string"
},
"image_url": {
"contentMediaType": [
"image/jpeg",
"image/png",
"image/webp",
"image/gif"
],
"description": "The picture to turn into a 3D model: one object or character, fully in frame. JPEG, PNG or WebP up to 10 MB.",
"minLength": 1,
"type": "string"
},
"model_orientation": {
"default": "default",
"description": "default keeps the standard orientation; align_image rotates the model to match the picture.",
"enum": [
"default",
"align_image"
],
"type": "string"
},
"quad_mesh": {
"default": false,
"description": "Return four-sided (quad) polygons instead of triangles, for editing in modelling tools; the file then comes back as FBX instead of GLB. Off by default; adds to the price.",
"type": "boolean"
},
"seed": {
"description": "Seed for the geometry step, for reproducible shapes.",
"maximum": 2147483647,
"minimum": 0,
"type": "integer"
},
"texture_alignment": {
"default": "original_image",
"description": "Align the texture to the original picture (the default) or to the generated geometry.",
"enum": [
"original_image",
"geometry"
],
"type": "string"
},
"texture_quality": {
"default": "standard",
"description": "Texture resolution: standard (the default) or detailed. detailed costs more and only applies to textured meshes.",
"enum": [
"standard",
"detailed"
],
"type": "string"
},
"texture_seed": {
"description": "Seed for the texture step. Keep seed fixed and change this to try new textures on the same shape.",
"maximum": 2147483647,
"minimum": 0,
"type": "integer"
}
},
"required": [
"image_url"
],
"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 $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "tripo/h3.1/image-to-3d",
"input": {
"image_url": "https://media.popnow.ai/influencer/examples/marco.webp",
"generate_texture": true,
"generate_pbr": true,
"texture_quality": "standard",
"geometry_quality": "standard",
"model_orientation": "default"
}
}'Send the same request body to POST /jobs/quote to see the estimated and maximum USD charge before running. A quote does not run the task or charge your balance.
Accepted
HTTP/1.1 202 Accepted
{
"code": 200,
"msg": "success",
"data": {
"taskId": "task_01k3m8x9q2z4v7n5p6r8s0t1w3",
"state": "queued"
},
"request_id": "req_example_create"
}HTTP 202 means accepted: the maximum USD amount is held until settlement. When a task is accepted, we reserve the maximum quoted amount from your API balance. On completion, we charge for actual usage, never more than the hold, and release the remainder. If the task fails, the hold is released.
Check status
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
-H "Authorization: Bearer $POPNOW_API_KEY"Poll every few seconds with backoff and stop once state is succeeded, failed, canceled or expired.
Finished task
{
"code": 200,
"msg": "success",
"data": {
"taskId": "task_01k3m8x9q2z4v7n5p6r8s0t1w3",
"model": "tripo/h3.1/image-to-3d",
"state": "succeeded",
"output": {
"assets": [
{
"url": "https://cdn.popnow.ai/tasks/task_01k3m8x9q2z4v7n5p6r8s0t1w3/output.png?signature=FROM_RESPONSE",
"expiresAt": "2026-10-17T12:20:00Z",
"mime": "image/png",
"width": 1024,
"height": 1024
}
]
},
"settled": true
},
"request_id": "req_example_record"
}Download from url before expiresAt. Need a fresh link later? Ask POST /common/download-url.
Verify a callback
import { createHash, createHmac, timingSafeEqual } from "node:crypto";
import express from "express";
const app = express();
// express.raw keeps the exact bytes that were signed; express.json would not match.
app.post("/hooks/popnow", express.raw({ type: "application/json" }), (req, res) => {
const timestamp = req.header("X-Webhook-Timestamp");
const signature = req.header("X-Webhook-Signature") ?? "";
const body = JSON.parse(req.body.toString("utf8"));
const taskId = body.data?.taskId ?? body.task_id;
const digest = createHash("sha256").update(req.body).digest("hex");
const expected = createHmac("sha256", process.env.POPNOW_WEBHOOK_SECRET)
.update(`${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.