Connect Rainbrand

Copy the Rainbrand MCP server URL:

https://mcp.rainbrand.com/mcp

Rainbrand supports two ways to authenticate:

Sign in with Rainbrand (OAuth) — the default for interactive clients. Sign in through a browser when your client prompts you.
API key — a static bloom_sk_... key for a server, continuous-integration job, automation host, or another environment without browser sign-in.

Create an API key from your account settings and treat it like a password. Reference it from an environment variable or secret store, never commit it or expose it client-side. The examples below use RAINBRAND_API_KEY where the client supports environment variables. An API key can use either header form; use the one your client expects:

x-api-key: bloom_sk_...

Authorization: Bearer bloom_sk_...

Choose your client

Claude
ChatGPT
Claude Code
Cursor
Codex

Connector availability and permissions depend on your Claude account and workspace policy. See Claude’s current requirements.

Open the connector settings

On Free, Pro, or Max, go to Customize → Connectors → Add custom connector. On Team or Enterprise, an owner first adds Rainbrand under Organization settings → Connectors; members then connect under Customize → Connectors.

Add the server

Paste the server URL and click Connect.

API key

Static request headers are in beta for eligible organizations. If your connector settings offer them, choose no sign-in and add an x-api-key header with your Rainbrand key. Otherwise, use OAuth above.

Custom MCP server availability depends on your ChatGPT plan and workspace settings. Check ChatGPT availability.Add Rainbrand as a custom MCP server, then install it as a plugin.

Open ChatGPT Plugins

Select +, then choose Add custom MCP server.

Add Rainbrand

Name the server Rainbrand and use The brand layer for agents. as its description. Under Connection, enter the Server URL and choose OAuth authentication:

Field	Value
Server URL	`https://mcp.rainbrand.com/mcp`
Authentication	OAuth

Create and install the plugin

Acknowledge the risk notice, choose Create as a plugin, then install it. Sign in with Rainbrand when prompted.

Open ChatGPT Plugins · ChatGPT plugin setup guide

Add the server

claude mcp add --transport http rainbrand https://mcp.rainbrand.com/mcp

By default, Rainbrand is available only to you in the current project. Add --scope user to make it available across all your projects.

Run /mcp inside Claude Code and sign in with Rainbrand when prompted. Use /mcp again to confirm that Rainbrand is connected.

API key

Pass the key as a header when you add the server:

claude mcp add --transport http rainbrand https://mcp.rainbrand.com/mcp \
  --header 'x-api-key:${RAINBRAND_API_KEY}'

Set RAINBRAND_API_KEY before starting Claude Code. Add --scope user to make the server available across all your projects.

Add the server

Add Rainbrand to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project):

{
  "mcpServers": {
    "rainbrand": {
      "url": "https://mcp.rainbrand.com/mcp"
    }
  }
}

API key

Add a headers block to the same file:

{
  "mcpServers": {
    "rainbrand": {
      "url": "https://mcp.rainbrand.com/mcp",
      "headers": {
        "x-api-key": "${env:RAINBRAND_API_KEY}"
      }
    }
  }
}

Set RAINBRAND_API_KEY before starting Cursor.

Codex CLI, the Codex IDE extension, and the ChatGPT desktop app share MCP configuration.

Add the server

codex mcp add rainbrand --url https://mcp.rainbrand.com/mcp

codex mcp login rainbrand

Use /mcp inside Codex to confirm that Rainbrand is connected.

API key

Set RAINBRAND_API_KEY, then add Rainbrand to ~/.codex/config.toml or a trusted project’s .codex/config.toml:

[mcp_servers.rainbrand]
url = "https://mcp.rainbrand.com/mcp"
bearer_token_env_var = "RAINBRAND_API_KEY"

After setup, confirm the connection by asking your agent to check the connected Rainbrand account and list your brands.

Getting started

Guides

Use cases

MCP

Choose your client

API key

API key

API key

API key

​Choose your client

​Sign in with Rainbrand

​API key

​Sign in with Rainbrand

​API key

​Sign in with Rainbrand

​API key

​Sign in with Rainbrand

​API key

Choose your client

Sign in with Rainbrand

API key

Sign in with Rainbrand

API key

Sign in with Rainbrand

API key

Sign in with Rainbrand

API key