Ad Legends · Claude setup

Connect Ad Legends
to Claude.

A plain-language walkthrough for Claude web, Desktop, Cowork, and Claude Code—plus a practical companion workflow for Claude Design.

Add the custom connector Request setup help Back to MCP

Availability first

Use Ad Legends now as a custom connector.

Ad Legends is not yet listed in Anthropic’s public Connectors Directory. You do not need to wait for that listing: Claude supports manually adding a trusted remote MCP server. The connection is attached to your Claude account, uses the production Ad Legends endpoint, and signs in through OAuth.

Anthropic does not verify custom connectors. Only add servers you trust, confirm the host is www.adlegends.ai, and review the requested access before approving it.

Choose your setup Request guided access Open Claude Connectors

Before you begin

Three things to have ready.

An Ad Legends account

Use the account that owns or can access the brands you want Claude to work with.

A supported Claude account

Free, Pro, and Max support custom connectors. Free accounts can add one. Team and Enterprise use an owner-managed path.

Permission to connect

A Team or Enterprise Owner must add the connector for the organization before each member completes OAuth.

Claude web and Desktop

One remote connector. Two permission paths.

Individuals can add Ad Legends themselves. Managed workspaces have an Owner add it once for the organization, then each member connects their own Ad Legends account.

Free, Pro, or Max

Add your custom connector

Open Claude web or Desktop, then open Customize (or Settings) and choose Connectors.
Select the plus button, choose Add custom connector, and name it “Ad Legends.”
Enter https://www.adlegends.ai/api/mcp/brands as the remote MCP server URL. Leave the advanced OAuth client fields blank unless Ad Legends support tells you otherwise.
Add the connector, choose Connect, and complete the Ad Legends OAuth sign-in.
Start a new conversation, open the plus menu, choose Connectors, and turn on Ad Legends.

Team or Enterprise

Have an Owner add it once

An Owner or Primary Owner opens Organization settings, chooses Connectors, then Add, Custom, and Web.
Name the connector “Ad Legends” and enter https://www.adlegends.ai/api/mcp/brands as the remote server URL.
The Owner adds it for the organization. Each member then opens Customize, Connectors, and finds Ad Legends under Custom.
Each member chooses Connect and signs in to their own Ad Legends account through OAuth.
In a new conversation, open the plus menu, choose Connectors, and turn on Ad Legends.

If Add custom connector is missing, your workspace policy or role may not allow it. Ask the Owner to add the connector or contact Ad Legends for guided setup.

Remote means account-based

Claude reaches this connector from Anthropic’s cloud, even when you use the Desktop app or Cowork. That is why Ad Legends uses a public HTTPS endpoint and why you should not editclaude_desktop_config.json for this setup. Once connected, the account-based connector can follow you across supported Claude surfaces; enable it in the conversation where you want to use it.

OAuth connection

Sign in without sharing your password with Claude.

Connect opens an Ad Legends authorization flow. Sign in there, confirm the account and access being requested, and approve only what you intend to use. OAuth creates a revocable connection; you do not paste an Ad Legends password or API key into the conversation.

Your Ad Legends role and brand permissions still apply. Claude can only receive the brands and actions allowed by the account you authorized.

Privacy and access checklist

Confirm the Ad Legends account shown in the OAuth window.
Review the requested scopes and brand access before approving them.
Use a Claude workspace appropriate for the brand information you plan to access.
Review tool calls before approving actions that create or change work.
Disable the connector for sensitive conversations that do not need it.
Disconnect Claude or revoke MCP access when the connection is no longer needed.

In Research mode, Claude may call enabled connector tools as it works. Keep write approvals visible and turn off connectors you do not need for that conversation.

Manage MCP access

Your first test

Open a fresh conversation and ask one question.

“Show my Ad Legends brands.”

Before sending, open the plus menu, choose Connectors, and make sure Ad Legends is on. A successful connection returns the brands available to the Ad Legends account you authorized.

Claude Design companion

Move from a design system to a campaign without losing the brand.

Claude Design is Anthropic’s beta web app and Desktop workspace for designs, prototypes, and presentations. Set up Ad Legends from Claude’s Connectors settings, then use the two products as companions: Claude Design develops the system and visual work; Ad Legends turns that system into strategy, ideas, and campaign creative.

Custom-connector availability inside the Design beta can depend on the current product and workspace controls. If Ad Legends is not shown inside that workspace, use it from a standard Claude conversation, Cowork, or Claude Code while your Design project is open.

See the full companion workflow Open Claude Design

The round trip

Develop the design system and visual direction in Claude Design.
Import its W3C DTCG design tokens into your Ad Legends brand with import_design_system.
Run Legends, Strategist, Fast Ads, and Idea Sessions against that shared system.
Export the Ad Legends design system with export_design_system when you want to carry the tokens back.

Claude Code

Add the same remote server from the command line.

Claude Code has its own MCP commands. Add Ad Legends at user scope so it is available across your projects, complete OAuth in the browser, verify the connection, then start a fresh Claude Code session.

Run the add command shown here in a terminal with Claude Code installed.
Run the login command and complete Ad Legends OAuth in the browser window.
Run the verify command and confirm the server reports as connected.
Start a fresh Claude Code session and ask “Show my Ad Legends brands.”

Commands

Add for this user: claude mcp add --scope user --transport http ad-legends https://www.adlegends.ai/api/mcp/brands
Authenticate: claude mcp login ad-legends
Verify: claude mcp get ad-legends

You can also open /mcp inside Claude Code to inspect servers, start OAuth, or clear stored authentication.

Troubleshooting

Fix the common connection misses.

Ad Legends is not in the Connectors Directory

That is expected today. Add the production MCP URL manually with Add custom connector.

Add custom connector is missing

Your Claude plan, workspace policy, or role may not allow it. Free accounts are limited to one custom connector; managed workspaces require an Owner or Primary Owner.

The OAuth window does not finish

Allow the browser window, confirm cookies and pop-ups are not being blocked, sign in to the intended Ad Legends account, and choose Connect again.

Ad Legends is connected but missing from the chat

Start a new conversation, open the plus menu, choose Connectors, and turn on Ad Legends for that conversation.

The brand list is empty or incomplete

Confirm OAuth used the correct Ad Legends account and that the account has permission to the expected brands.

You connected the wrong account

Disconnect the custom connector or revoke MCP access in Ad Legends settings, then reconnect and choose the correct account.

Desktop instructions mention a local config file

Those instructions are for local MCP servers or Desktop extensions. Ad Legends is a remote account-based connector and uses Claude Connectors settings.

Ad Legends is not visible inside Claude Design

The Design beta and workspace controls can differ. Use the connected server from standard Claude chat, Cowork, or Claude Code alongside the Design project, and follow the companion workflow on this page.

Official Anthropic references

Anthropic’s current documentation distinguishes public Directory connectors, account-based custom remote connectors, local Desktop extensions, Claude Code MCP servers, and the Claude Design beta.

Questions

The details that matter before you connect.

Why can’t I find Ad Legends in Claude’s Connectors Directory?

Ad Legends is not yet listed in Anthropic’s public Connectors Directory. Claude still supports adding a trusted remote MCP server manually as a custom connector, which is the supported Ad Legends setup today.

Is a Claude custom connector the same thing as a ChatGPT plugin?

The purpose is similar, but the terminology and setup are different. Claude calls the account-based integration a custom connector. Add it from Claude’s Connectors settings, then enable it for the conversation where you want to use it.

Can a free Claude account connect to Ad Legends?

Anthropic currently allows Free users to add one custom connector. Pro and Max users can add custom connectors too. Team and Enterprise workspaces require an Owner or Primary Owner to add the connector for the organization before members connect their own accounts.

Do I edit claude_desktop_config.json?

No. Ad Legends uses a publicly reachable remote MCP server, so Claude connects through your account and Anthropic’s cloud. The local Desktop configuration file is for a different local-server and extension path.

Can I use Ad Legends with Claude Design?

Yes—as a companion workflow. Connect Ad Legends from Claude’s Connectors settings, then use Claude Design for the design system and visual work while Ad Legends turns that system into strategy, ideas, and campaign creative. Availability of custom connectors inside the Claude Design beta itself can depend on the current product and workspace controls.

How do I confirm the connection worked?

Start a fresh Claude conversation, enable Ad Legends from the Connectors menu, and ask, “Show my Ad Legends brands.” A successful connection should return only the brands your signed-in Ad Legends account can access.

Ready to bring your brand into Claude?

Add the custom connector, complete OAuth, and give Claude secure access to the Ad Legends brands you choose.

Add the custom connector Request setup help Start free

Connect Ad Legends to Claude.

Use Ad Legends now as a custom connector.

Three things to have ready.

An Ad Legends account

A supported Claude account

Permission to connect

One remote connector. Two permission paths.

Add your custom connector

Have an Owner add it once

Sign in without sharing your password with Claude.

Open a fresh conversation and ask one question.

Move from a design system to a campaign without losing the brand.

Add the same remote server from the command line.

Fix the common connection misses.

Official Anthropic references

The details that matter before you connect.

Why can’t I find Ad Legends in Claude’s Connectors Directory?

Is a Claude custom connector the same thing as a ChatGPT plugin?

Can a free Claude account connect to Ad Legends?

Do I edit claude_desktop_config.json?

Can I use Ad Legends with Claude Design?

How do I confirm the connection worked?

Ready to bring your brand into Claude?

Connect Ad Legends to Claude.

Use Ad Legends now as a custom connector.

Three things to have ready.

An Ad Legends account

A supported Claude account

Permission to connect

One remote connector. Two permission paths.

Add your custom connector

Have an Owner add it once

Sign in without sharing your password with Claude.

Open a fresh conversation and ask one question.

Move from a design system to a campaign without losing the brand.

Add the same remote server from the command line.

Fix the common connection misses.

Official Anthropic references

The details that matter before you connect.

Why can’t I find Ad Legends in Claude’s Connectors Directory?

Is a Claude custom connector the same thing as a ChatGPT plugin?

Can a free Claude account connect to Ad Legends?

Do I edit claude_desktop_config.json?

Can I use Ad Legends with Claude Design?

How do I confirm the connection worked?

Ready to bring your brand into Claude?

Connect Ad Legends
to Claude.

Connect Ad Legends
to Claude.