The Brand API Register
Agentic brand work

Rainbrand API

Rainbrand keeps a whole brand current for agents, gives them the guidance and files each task needs, and checks the result. API and MCP plans from $20 a month.

Last updated 2026-11-10

Rainbrand builds a brand from your sources (a website, a brand guide, logos, fonts, images or written direction) and keeps it current as you edit it. For each task, an agent or your code asks for a Brief: the guidance and the selected files that task needs. A Review checks the finished work against the brand. Agents reach it over MCP; your code uses the REST API.

  • Logos Yes
  • Colours Yes
  • Fonts Yes
  • Guidance Yes
  • Files Yes

What does Rainbrand return?

  • LogosLogo files from the brand's own sources, chosen for each task in a Brief, or all of them in the Brand Skill.
  • ColoursThe brand's colours are part of its profile, with the rules for using them.
  • FontsFont files (such as WOFF2) with rendered specimens, selected for each task.
  • GuidanceMarkdown guidance for each task in a Brief (voice, visual rules, claims), and the brand's full guidance in the Brand Skill.
  • FilesImages, video and audio kept in the brand's Brand Library, selected for each task.

How is it billed?

Monthly credits on every plan: a Brief costs 100, a Review 200, a brand edit 300 and a new brand 500. The API and MCP are included in every plan.

What are the limits?

120 accepted requests per API key, counted until 60 seconds after the last accepted request; 5 new brands per account in any 60 seconds.

What do the terms require?

Not published

Who keeps it current?

You or your customer: describe a change, Rainbrand prepares a brand edit, and you apply or discard it. Briefs requested after that use the new version.

How do you call it?

curl -X POST https://www.rainbrand.com/api/v1/brands -H "x-api-key: $RAINBRAND_API_KEY" -H "Content-Type: application/json" -d '{"sources": [{ "kind": "website", "url": "https://acme.com" }]}'

When should you use something else?

  • For a logo beside a company name, use a lookup such as Logo.dev or Brandfetch. A new brand in Rainbrand costs 500 credits and has to be analysed before it's ready, so it isn't meant for thousands of CRM rows.
  • For the archive, rights and distribution of files, keep your DAM. Rainbrand doesn't sync with any DAM; its own advice is to add a curated set of current files and leave the rest where it is.
  • If your code needs to hear when a brand changes, no webhooks are documented. Store the brand version you used with each result.

How do you start?

The API quickstart adds a brand and requests a Brief in four calls. For agents in Claude, ChatGPT, Cursor or Codex, connect the MCP server at https://mcp.rainbrand.com/mcp (setup).

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