--- title: "Claude MCP connector for on-brand writing, decks and images | Rainbrand" description: "Add the Rainbrand connector to give Claude your brand's voice, logos and photos. Make on-brand writing, decks and images, and review each asset against the brand." url: "https://www.rainbrand.com/integrations/claude/" --- [Integrations](https://www.rainbrand.com/integrations/) Checked 29 Oct 2026 Claude with Rainbrand # Claude MCP connector for on-brand writing, decks and images Add the Rainbrand connector to give Claude your brand's voice, logos and photos. Make on-brand writing, decks and images, and review each asset against the brand. [Open the Rainbrand connector](https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Rainbrand&connectorUrl=https%3A%2F%2Fmcp.rainbrand.com%2Fmcp) [Docs quickstart](https://docs.rainbrand.com/mcp/getting-started) Written by Siddharth Borderwala, Founding Engineer at Rainbrand Add Rainbrand to Claude as a custom connector and sign in with your Rainbrand account. Before Claude writes, builds a deck or makes an image, it can then ask Rainbrand for a Brief: the voice, claims, logos, fonts and reference images that one task needs. Custom connectors work on every Claude plan, but Free allows only one, and on Team and Enterprise an Owner adds it for the organisation. ## Add the Rainbrand connector Anthropic calls an MCP server connected to Claude a connector. You add Rainbrand as a custom connector, by its server address, in claude.ai or the Claude desktop app. 1. Open the Rainbrand connector in Claude and add it. [Open Rainbrand connector](https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Rainbrand&connectorUrl=https%3A%2F%2Fmcp.rainbrand.com%2Fmcp) 2. Select Connect, then sign in to Rainbrand. You can also install the [Rainbrand Skill](https://docs.rainbrand.com/mcp/getting-started#standalone-rainbrand-skill) or the [plugin](https://github.com/rainbrandai/rainbrand-skills/releases/latest/download/rainbrand.claude-plugin.zip). The link opens **Customize > Connectors** with the **Add custom connector** dialog filled in: the name Rainbrand and the address `https://mcp.rainbrand.com/mcp`. Claude notes that the values came from a link, so check them and select **Continue**. Then select **Connect** and sign in to Rainbrand, or create an account. Rainbrand appears under **Your connectors** with the **Custom** label. ![Claude's Add custom connector dialog with the name Rainbrand and the address https://mcp.rainbrand.com/mcp filled in](https://www.rainbrand.com/_next/image?url=%2Fintegrations%2Fclaude%2Fconnector-dialog.webp&w=3840&q=75&dpl=dpl_5K2YnPscVW9Fnge1aaKQUQsMYtNY) Connectors are switched on per chat. Select **+** in the message box, then **Connectors**, and check that Rainbrand is on. The first time Claude calls one of Rainbrand's tools, it asks you to allow it. **Always allow** stops the prompts for that tool, and you can change this tool by tool on Rainbrand's page under **Customize > Connectors**. Then start a new chat and check which account is connected. If you use more than one Rainbrand account, do this first. Ask Claude ``` Show me which Rainbrand account is connected. ``` ![Claude replying with the connected Rainbrand account's name, under the Rainbrand tool call, with the email blurred](https://www.rainbrand.com/_next/image?url=%2Fintegrations%2Fclaude%2Faccount-check.webp&w=3840&q=75&dpl=dpl_5K2YnPscVW9Fnge1aaKQUQsMYtNY) ### Which plans can use it Custom connectors work in claude.ai, the desktop app and Cowork on every Claude plan. Once Rainbrand is connected, it's in your chats on the web, desktop and mobile apps. Free You can add one custom connector, so Rainbrand takes your only slot. Pro and Max: You add Rainbrand yourself. Team An Owner or Primary Owner adds Rainbrand under **Organization settings > Connectors**. Each member then connects it with their own Rainbrand account. Enterprise As on Team. Members whose custom role can manage the organisation's libraries can add it too. On Team and Enterprise, members without those roles can't add custom connectors, so the link is for Owners. Owners can also use [the organisation version of the link](https://claude.ai/admin-settings/connectors?modal=add-custom-connector&connectorName=Rainbrand&connectorUrl=https%3A%2F%2Fmcp.rainbrand.com%2Fmcp), which fills in the same dialog in organisation settings. ### Pick a brand, or add one If your team already has brands in Rainbrand, ask Claude to list them. To add one, give Claude what defines it: a website, a brand guide, written rules, logos or images. Upload files through Rainbrand's file picker, which opens in the chat. A brand is usually ready in about 90 seconds. Ask Claude ``` Add a brand in Rainbrand from [your website] and the files I upload. Open Rainbrand's file picker for the files. Wait until the brand is ready, then show me its name and a summary of its guidance. ``` ![Rainbrand's file picker open inside a Claude chat, with a press release PDF, the logo and Heart's brand kit zip uploaded](https://www.rainbrand.com/_next/image?url=%2Fintegrations%2Fclaude%2Ffile-picker.webp&w=3840&q=75&dpl=dpl_5K2YnPscVW9Fnge1aaKQUQsMYtNY) ## Write the update email I gave Claude a job where the facts had to be right: an update to Heart Aerospace's investors and airline partners on August to October 2026, built from Heart's own newsroom. I added Heart Aerospace to Rainbrand first, from heartaerospace.com, its X1 press release, its logo and its brand kit. Example Heart Aerospace is a real brand used for illustration. This is independent concept work, not made with or endorsed by Heart Aerospace. Heart Aerospace is a trademark of Heart Aerospace. One Brief covers the whole update, because the email, the deck and its cover share the same audience and facts. Ask Claude ``` Request a Rainbrand Brief for Heart Aerospace. The task is an update to Heart's investors and airline partners on August to October 2026: an email of about 250 words, then a five-slide 16:9 deck with a cover image of the ES-36. It covers three announcements on heartaerospace.com/newsroom: X1's first flight, the ES-36 unveiling with JSX's purchase agreement, and the FAA CLEEN award. Wait for the Brief and show me its guidance and files. Then write the email using it, and check every fact against Heart's newsroom. ``` The Brief described Heart's voice as concise, declarative and confident: lead with the practical outcome, lower-cost regional flying, then explain the engineering behind it. It kept X1's test results apart from what the ES-36 is planned to do, allowed "zero emissions" only for all-electric routes, and tied the 40% operating-cost claim to entry into service. It also said the brand's files don't confirm the three announcements, so the dates and terms had to come from the newsroom. ![A Claude chat showing the Rainbrand Brief's guidance for the Heart Aerospace update](https://www.rainbrand.com/_next/image?url=%2Fintegrations%2Fclaude%2Fbrief.webp&w=3840&q=75&dpl=dpl_5K2YnPscVW9Fnge1aaKQUQsMYtNY) Claude's update email · Oct 30, 2026 **Subject:** Heart Aerospace update: August–October 2026 Dear investors and partners, Three milestones this quarter move Heart from demonstration toward production. **X1 flies.** On August 12, our X1 demonstrator completed its first flight at Plattsburgh International Airport in upstate New York. The 27-minute piloted mission reached 1,100 feet AGL, and the all-electric propulsion system delivered more than one megawatt. With a 106-foot wingspan and a takeoff weight above 25,000 pounds, X1 is the largest battery-electric aircraft ever flown. **ES-36 unveiled, with JSX.** On September 23, we unveiled the ES-36, our 36-seat hybrid-electric production aircraft. Shaped by what we learned from X1, it uses a simpler two-nacelle airframe with twin series-hybrid powertrains. It adds six seats and 20 percent more payload than the ES-30 at the same maximum takeoff weight. We are targeting 125 miles of all-electric range and 745 miles in hybrid mode, both plus reserves, and operating costs at least 40 percent below legacy regional aircraft. JSX converted its 2023 letter of intent into a deposit-backed purchase agreement for 50 ES-36 aircraft, with purchase rights for 50 more. **FAA CLEEN award.** On October 12, the FAA selected Heart for a $2.9 million award under Phase IV of its CLEEN program. Heart matches the award, funding Project HYPER, a $5.8 million, 24-month effort. HYPER will develop and test the ES-36's megawatt-class turbogenerator, first on the ground and then aboard our pre-production aircraft. **Next:** we are building the first pre-production ES-36 at our Los Angeles pilot plant. We are targeting first flight in the second half of 2028 and entry into service in 2031, following FAA Part 25 certification. Thank you for your continued support. \[Name\] Heart Aerospace Claude then checked each fact against the newsroom and listed what it left out on purpose: luggage and charging figures the Brief mentioned but the releases don't, and a customer-commitment total that the releases give two ways. ## Make the cover image Claude doesn't make photos or illustrations itself, so the cover comes through Rainbrand's AI Gateway. That uses Rainbrand credits, and the image is saved to Rainbrand, where a Review can check it. The Brief said Heart's brand has no ES-36 image and labelled its only 16:9 aircraft photo an ES-30. Claude spotted that the photo shows "ES-36" and two nacelles, so the label was wrong, and took the aircraft from an ES-36 side-profile render in another Heart Aerospace brand on the same team. A generated ES-36 in the sky mustn't be passed off as a photo, so the deck labels it a concept render. Ask Claude ``` Make the 16:9 cover through Rainbrand's AI Gateway with Nano Banana 2.1 and the same Brief: a concept render of the ES-36 in flight above cloud in early light. Take the aircraft and its markings from the side-profile render, and leave open sky on the left for the title. Then request a Review for colour, typography, logo and copy, and fix what it finds. ``` ![A concept render of the ES-36 flying left above a sea of cloud at dawn, first try](https://www.rainbrand.com/_next/image?url=%2Fintegrations%2Fclaude%2Fes-36-cover-first.webp&w=3840&q=75&dpl=dpl_5K2YnPscVW9Fnge1aaKQUQsMYtNY) First try 2 fail · 2 uncertain ![A concept render of the ES-36 flying left above a sea of cloud at dawn, after the fix](https://www.rainbrand.com/_next/image?url=%2Fintegrations%2Fclaude%2Fes-36-cover-fixed.webp&w=3840&q=75&dpl=dpl_5K2YnPscVW9Fnge1aaKQUQsMYtNY) After two edits 1 pass · 3 uncertain Made through Rainbrand's AI Gateway with Nano Banana 2.1, then two image edits, Oct 30, 2026. The first Review failed copy and colour. The small "Heart Aerospace" lettering by the cockpit came out garbled, and the dawn light gave the white and grey paint a blue-purple cast. Claude neutralised the paint with an edit. A second edit still garbled the lettering, so Claude removed it and kept only the symbol. It also caught something no check covers: the visible wing's tip light was green, and on the left wing it should be red. The second Review passed copy. Colour, logo and typography came back uncertain, because markings painted on a curved, lit fuselage can't be measured against flat brand swatches. On a render like this, the Review catches wrong words and colour casts but won't confirm the logo, and it doesn't check whether the aircraft is drawn right, so compare that with the render yourself. Copy First: fail, the lettering by the cockpit was garbled. After: pass. Colour First: fail, a blue-purple cast on the white and grey paint. After: uncertain. Logo: First and after: uncertain. Typography: First and after: uncertain. ## Build the five-slide deck Claude makes PowerPoint files in its code sandbox. The Brief already covers the slides: black and white with two greys, Neue Haas Grotesk Display Bold for headlines and Text Regular for body copy, with links to the font files. Heart's logo has no white version, so the black lockup only goes on a light area. Ask Claude ``` Now build the update as a five-slide 16:9 PowerPoint deck: title, X1's first flight, the ES-36 and JSX, the CLEEN award, and what's next. Follow the Brief for colours, fonts and logos. Put the fixed cover on the title slide and label it 'Concept render'. ``` ![The Heart Aerospace update deck open on its title slide: August–October 2026 over the ES-36 concept render, with the black Heart Aerospace lockup and a Concept render label](https://www.rainbrand.com/_next/image?url=%2Fintegrations%2Fclaude%2Fdeck-title-slide.webp&w=3840&q=75&dpl=dpl_5K2YnPscVW9Fnge1aaKQUQsMYtNY) Claude's .pptx, opened in Keynote, Oct 30, 2026. The cover and the logo made it into the file. The fonts didn't: the deck names Neue Haas Grotesk but doesn't embed it, so the type shows in that face only on computers that have it installed. If Claude's sandbox can't download a file from www.rainbrand.com, an Owner on Team and Enterprise can allow the domain under **Organization settings > Capabilities**. ## Why not keep the brand in a Claude Project or skill? Claude has three places to keep a brand, and each does part of the job. Projects are on every plan: a Project holds instructions and files that every chat in it uses, and on Team and Enterprise you can share one. A skill is a folder of instructions, scripts and files that Claude loads when a task matches it. It can carry your logo files and fonts, and when you update a skill you've shared, colleagues get the new version the next time they use it. A design system, in beta on paid plans, captures colours, type, components and layouts, and Claude applies it to designs and decks. None of the three reaches past Claude on its own. A Project's instructions and files reach only the chats in that project. A skill you add in claude.ai also loads in Claude Code when you sign in with the same account, but Anthropic's API docs say custom skills don't sync across surfaces: a skill uploaded to claude.ai has to be uploaded again to use through the API. Cursor and Codex can read the same skill format, but you install and update a copy in each. A brand in Rainbrand is one source for every agent you connect: Claude, ChatGPT, Cursor, Codex, and your own product through the API. When the brand changes, you edit it once, and each agent uses the new version on its next task. Rainbrand builds it from a PDF or your website in about 90 seconds on average, and each Brief sends only what the task needs. For this update, that was two of the 112 images in Heart's brand. Keep campaign facts and drafts in a Project if you like, and ask for the Brief inside it. ## What it can't do in Claude Files you attach to a Claude message stay in Claude, and Rainbrand can't open them, so use Rainbrand's file picker in the chat or a public link. Reviews check images, including the words in them, but not the text of an email, and not whether an aircraft or a product is drawn correctly. Rainbrand is a custom connector, and Claude never suggests custom connectors on its own, so switch it on in the chat or ask for Rainbrand by name. Rainbrand doesn't read or change your Projects, skills or design systems in Claude. To move a brand out of one, add it to Rainbrand once from its files, with its written rules as guidance. ## Fix common problems You can't add the connector On Team and Enterprise, ask an Owner to add it with the organisation link above. On Free, you can have one custom connector, so remove the other one first. Claude answers without Rainbrand Select **+**, then **Connectors**, and switch Rainbrand on for this chat, or ask for a Rainbrand Brief by name. Claude asks before every Rainbrand tool Choose **Always allow**, or set permissions tool by tool on Rainbrand's page under **Customize > Connectors**. A Brief or brand is still processing Claude stops waiting on a tool after 240 seconds, but the work carries on in Rainbrand. Ask Claude to check the same Brief or brand again. Starting the task over can create a duplicate. Rainbrand can't open a file Upload it through Rainbrand's file picker or share a public link. Files attached to a Claude message aren't reachable. Rainbrand shows Reconnect Select **Reconnect** under **Customize > Connectors** and sign in to Rainbrand again. Out of credits Follow the link in the message to add credits or upgrade. More fixes are in Rainbrand's [troubleshooting guide](https://docs.rainbrand.com/mcp/troubleshooting). ## Questions ### Does the connector work in Claude Code? Yes. Connectors you add in claude.ai are available in Claude Code when you sign in there with the same Claude account, in the terminal and in cloud sessions. Claude Code also has a Rainbrand plugin with the Skill and the connection together; see [Rainbrand in Claude Code](https://www.rainbrand.com/integrations/claude-code/). ### Is a connector the same as a skill or a plugin? No. A connector links Claude to a service over MCP, a skill is instructions Claude loads for a task, and a plugin packages skills and connectors into one install. Rainbrand's Briefs, Reviews and generation come through the connector. ### Does it work in the Claude mobile app? Yes. Once Rainbrand is connected, it's available in your chats on the web, desktop and mobile apps. ### Can my team use the same brands? Yes. Brands in a Rainbrand team are available to everyone in it, in whichever agent they connect. In Claude, each person connects Rainbrand with their own Rainbrand account. ### What does it cost? Your Claude plan covers Claude. The connector works on every Rainbrand plan, and Briefs, Reviews and generations through Rainbrand use Rainbrand credits. Plans and credit prices are on our [pricing page](https://www.rainbrand.com/pricing/). ## Read next - [MCP quickstart](https://docs.rainbrand.com/mcp/getting-started) Connect any agent, add a brand and request your first Brief. - [How to give multiple AI assistants the same brand guidelines](https://www.rainbrand.com/blog/give-multiple-ai-assistants-the-same-brand-guidelines/) Connect assistants to the same maintained brand, give each task the guidance and files it needs, and track the snapshots that still need replacing. - [ChatGPT with Rainbrand](https://www.rainbrand.com/integrations/chatgpt/) Install the Rainbrand plugin to give ChatGPT your brand's voice, logos and photos. Make on-brand copy, images, video and audio, and review each asset against the brand. - [Claude Code with Rainbrand](https://www.rainbrand.com/integrations/claude-code/) Install the Rainbrand plugin to give Claude Code your brand's voice, fonts, logos and photos. Build on-brand pages and components, and review each against the brand. ## Install in your agent. Add Rainbrand to the agent you already use. [Read the docs](https://docs.rainbrand.com/mcp/getting-started) ### Claude 1. Open the Rainbrand connector in Claude and add it. [Open Rainbrand connector](https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Rainbrand&connectorUrl=https%3A%2F%2Fmcp.rainbrand.com%2Fmcp) 2. Select Connect, then sign in to Rainbrand. You can also install the [Rainbrand Skill](https://docs.rainbrand.com/mcp/getting-started#standalone-rainbrand-skill) or the [plugin](https://github.com/rainbrandai/rainbrand-skills/releases/latest/download/rainbrand.claude-plugin.zip). ### ChatGPT + Codex 1. Open the Rainbrand plugin and add it. [Open Rainbrand plugin](https://chatgpt.com/plugins/plugin_asdk_app_6ac6e5030ec88191a88001f6dc0628ca) 2. Connect your Rainbrand account when asked. It works in ChatGPT and in Codex. ### Claude Code 1. Add Rainbrand's plugin marketplace in your terminal. ``` claude plugin marketplace add rainbrandai/rainbrand-skills ``` 2. Install the Rainbrand plugin, including its Skill and MCP connection. ``` claude plugin install rainbrand@rainbrand ``` 3. Start a new Claude Code session, then use /mcp to sign in to Rainbrand. You can also [connect with MCP](https://docs.rainbrand.com/mcp/getting-started#claude-code-installation-options) or install the [Rainbrand Skill](https://docs.rainbrand.com/mcp/getting-started#standalone-rainbrand-skill). ### Cursor 1. Add Rainbrand to ~/.cursor/mcp.json. ``` { "mcpServers": { "rainbrand": { "url": "https://mcp.rainbrand.com/mcp" } } } ``` 2. Sign in from the Cursor CLI. ``` agent mcp login rainbrand ``` You can also install the [Rainbrand Skill](https://docs.rainbrand.com/mcp/getting-started#standalone-rainbrand-skill) or the [plugin](https://github.com/rainbrandai/rainbrand-skills/releases/latest/download/rainbrand.cursor-plugin.zip). ### API 1. Create an API key in your account settings, then list your brands. ``` curl https://www.rainbrand.com/api/v1/brands -H "x-api-key: $RAINBRAND_API_KEY" ``` Integrating Rainbrand into your app? [Read the API docs](https://docs.rainbrand.com/api). The brand layer for agents. Rainbrand builds and maintains shared brand context for your agents and products. [Get started](https://www.rainbrand.com/auth/sign-in) [Read the docs](https://docs.rainbrand.com/)