Polotno + Fourthwall pairs Polotno's embedded design editor SDK with Fourthwall's Open API . Your users design apparel and merch inside your app, your backend creates products in Fourthwall, and Fourthwall handles storefront, orders, memberships, and fulfillment.
The problem Fourthwall doesn't solve
Fourthwall is creator commerce done right — open API, active developer community, memberships, and a storefront model built for musicians, YouTubers, and streamers. Their product-catalog workflow is solid, but their built-in designer assumes creators arrive with finished artwork, and most creators don't own professional design software.
Creator-focused apps on Fourthwall usually:
- Ask creators to upload completed mockups
- Offer template-and-text tooling but no real layered editor
- Skip collection pages because generating multi-garment mockups is too manual
Polotno goes in front of Fourthwall so creators design merch in a real layered editor , generate collection-ready mockups, and publish to their Fourthwall shop without leaving your app.
How the integration works
- Design — Creator picks a Fourthwall product (T-shirt, hoodie, mug). Polotno loads the canvas with print-zone overlays.
- Edit — Creator layers artwork, text, and effects. Social-ready mockups preview live.
- Export — Your app exports 300dpi PNG for print files plus supporting mockup images for the shop listing via store.toDataURL .
- Create product — Your backend POSTs to Fourthwall's Open API to create the product with artwork, variants, and listing images.
- Sell + fulfill — Fourthwall lists the product on the creator's shop, takes the order, and fulfills.
What a request looks like
// 1. Export print artwork + social-ready mockups.
const printUrl = await uploadToYourStorage(
await store.toDataURL({ pixelRatio: 4, mimeType: "image/png" })
)
const mockupUrl = await uploadToYourStorage(
await mockupStore.toDataURL({ mimeType: "image/jpeg" })
)
// 2. Create the product on Fourthwall.
// See https://docs.fourthwall.com/open-api/ for product + orders schemas.
await fetch(FOURTHWALL_PRODUCTS_ENDPOINT, {
method: "POST",
headers: {
Authorization: `Bearer ${FOURTHWALL_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
/* product type, variants, print files, listing images — per Fourthwall Open API */
}),
})
What Polotno handles vs. what Fourthwall handles
Polotno (in your app)
- Creator-friendly templates (apparel, drinkware, accessories)
- Embedded editor UI — layered design with text, image, effects
- Social-ready mockup generator via Cloud Render API
- Collection page previews
- 300dpi print file export
Fourthwall (backend)
- Storefront and memberships
- Product catalog + variants
- Checkout, payments, and taxes
- Printing and fulfillment
- Order status webhooks
Technical details
- Export: 300dpi PNG for print; JPEG or PNG mockups for listings via store.toDataURL .
- Auth: Fourthwall Open API bearer tokens.
- Developer community: Fourthwall runs an active developer community for schema questions.
- Rendering modes: Client-side for creator previews; Cloud Render API for batch mockup renders.
What you can build
Creator apparel + merch from Fourthwall's catalog:
- T-shirts and long sleeves
- Hoodies and sweatshirts
- Hats
- Mugs and tumblers
- Tote bags
- Stickers and pins
- Posters and prints
FAQ
Do I need a Fourthwall account?
Yes, with Open API access. Fourthwall is developer-friendly — start at their docs .
Can creators preview merch for social?
Yes. The Cloud Render API renders social-ready mockups alongside the print file for Instagram, TikTok, and shop-listing imagery.
Can I build a tool that manages multiple creator accounts?
Yes. Fourthwall's API supports multi-shop integrations; Polotno renders per-creator designs against their product catalog.
Closed beta
The Polotno + Fourthwall integration has been in closed beta since April 2026. If you're building a creator tool on Fourthwall, request access — or start integrating Polotno first.
