--- title: "AI Sign Designer Available Now on API and MCP - Sign Customiser Changelog" description: "Changelog: AI Sign Designer Available Now on API and MCP. Learn about the latest updates and improvements to Sign Customiser." url: "https://www.signcustomiser.com/changelog/ai-sign-designer-available-now-on-api-and-mcp/" last_updated: "2026-10-23" --- The AI sign designer now works through the Sign Customiser API and through AI agents. Send a PNG, JPEG or WebP image of 5 MB (5,242,880 bytes) or less. The AI sign designer makes a sign design and gives you the production files. A delivered design uses one credit. A design that fails uses no credit. ## What’s Changed - **Make a design with the API.** Send an image and start a design job. Read the job until the design is ready. The API makes neon, channel letter and metal cut-out designs. - **Get production files.** Each design has an SVG file, an EPS file and an Illustrator-compatible PDF file. To get only the SVG file, ask for SVG only. - **Share files with no login.** Each ready file has a download link. The link needs no API key and no login. You can give it to a manufacturer. - **Pay for delivered designs only.** The AI sign designer holds one credit when a design starts. It uses the credit when the design is delivered. It releases the credit when the design fails. - **Send a request again with no second charge.** If you send the same request again with the same `Idempotency-Key`, you get the same job. You use no second credit. - **Retry a failed conversion for free.** If an EPS or PDF conversion fails, you can start it again. Each design has 3 free retries. - **Use an AI agent.** Seven new MCP tools let an agent check the credits of the Store, send your image, start a design and get the files. Claude Code, OpenAI Codex and ChatGPT can use them. - **Confirm the credit first.** Before an agent starts a design, it must confirm that the design uses one credit. ## PNG files with a non-standard colour profile Before this fix, the API and the MCP server could reject a valid PNG file that has a non-standard colour profile. Older Adobe exports often have this profile. The API and the MCP server now accept these files. They still reject a damaged file. ## Get started 1. Create an API key in **Tools & Settings > API Tokens**. Select the `ai_sign_designs:read` and `ai_sign_designs:write` scopes. A key that you made before with a fixed list of scopes does not have these scopes. 2. Follow the [AI sign designer guide](/help/api/guides/ai-sign-designer/). 3. To use an AI agent, follow the [connection guide](/help/mcp/guides/connect/). Approve **View AI sign designs** and **Use the AI sign designer**. If you connected the agent before, connect it again. - [feature](/changelog/tag/feature/) - [fix](/changelog/tag/fix/) - [AI Sign Designer](/changelog/tag/ai-sign-designer/) - [neon](/changelog/tag/neon/) - [metal](/changelog/tag/metal/) Let your customers design their own signs ![Three custom sign types: neon, acrylic, and brushed metal letters](/_astro/sidebar-sign-showcase.9TDqJKD9_TbyVB.webp) Add a full sign customiser to your online store in minutes. Neon, acrylic, metal — with real-time pricing. [Start your free 7-day trial](/install/) Works with Shopify, WooCommerce, Wix & more. 7 days free. Every plan includes every feature. ## Previousupdates [View all updates](/changelog/) - [October 18, 2026Add a Buy it now button to your customiserShow a second button under the add-to-cart button. This button adds the sign to the cart and opens checkout in one step.feature](/changelog/buy-it-now-button/) - [October 17, 2026Add up to 10 background imagesUse up to 10 background images in each customiser.feature](/changelog/ten-background-images/) - [October 11, 2026Control how your sign artwork looks at every sizeLink each size to its own scene background for all sign types. Your artwork is part of the background, and the customer types their own text in the empty area.feature](/changelog/neon-artwork-scene-background-for-each-size/) - [October 10, 2026Choose which measurements show in the cartShow the measurements in the visualiser and hide them in the cart. Or show only the width or the height in the cart. The letter height has its own setting.feature](/changelog/cart-measurement-settings/) [View all updates](/changelog/) ## Sitemap See the full [sitemap](/sitemap.md) for all pages.