Macaly

Name: Macaly MCP Server
Availability: InStock
Author: Macaly

Design21 tools

Build, iterate on and publish real web apps from your AI assistant. 21 tools, OAuth sign-in on identity-only scopes, a Pro plan gate, and a publish_app tool that ships live software.

Verified connector

Listed by Anthropic as a partner connector in its Connectors Directory.

Connection checked by Agentman on 18 August 2026.

Anthropic states this reflects the level of review a connector received, not a security audit.

Connect Macaly via MCP

https://www.macaly.com/api/mcp/mcp

Works in any MCP-compatible client. In Agentman Studio it is one click — no config file to edit.

Macaly Tools & Capabilities (21)

Tool names from Anthropic's directory listing. This server requires sign-in, so we could not read tool descriptions or parameter schemas.

Limits

Pro plan required, from $25/month, checked per workspace. Free and Hosting plans cannot use the MCP server at all. A tool call against a non-Pro workspace returns FORBIDDEN.
Every build spends credits. create_app and send_message consume credits from the workspace they run in. Macaly publishes no per-call rate, only that cost scales with request complexity.
Credits do not roll over. Monthly credits expire at the end of each billing period; one-time top-ups last 60 days.
Three identity scopes and nothing to decline. openid, profile and email say nothing about apps, deploys or domains. Approving the connection approves publishing to the public internet.
OAuth spans every workspace you belong to. Macaly states a connected client can act on any workspace you are a member of. Only an Enterprise-tier API key narrows this to one workspace.
Publishing is guarded by an instruction, not a hard block. Macaly says the server instructs agents to call publish_app only when you explicitly ask. That is a server-side prompt to the model, not a platform-enforced confirmation.
Rate limits are 120 read and 20 write calls per minute per account, returning RATE_LIMITED with a retry delay.
AI video, music and text-to-speech generation are unavailable over MCP. Macaly disables them for builds triggered through a connected client. Requests degrade gracefully rather than failing.
The build agent reaches the public internet. Macaly annotates create_app and send_message open-world because builds search, fetch pages, screenshot and scrape public data.
Deleting a workspace is permanent and irreversible — projects, chats, databases and connected domains all go. No tool here reaches that action, so do not read the app-level trash behaviour as covering it.
A custom domain still needs DNS records you add yourself. connect_domain returns the records; it cannot make a domain resolve without action at your registrar. Propagation can take 24 hours.
Published projects carry AI disclosure by default. Macaly adds a machine-readable ai-generated meta tag and a visible "Made with AI in Macaly" badge. The badge cannot be hidden on Free, and Pro can hide it — at which point any required AI disclosure becomes yours to add.
Compliance for what you ship is yours. Macaly names healthcare data under HIPAA, raw payment card data under PCI DSS, and apps aimed at children as areas needing work beyond its defaults.
We could not read tool schemas or safety annotations off the wire. The endpoint is gated, so the 21 names and the count are the directory's, and the destructive and open-world annotations quoted here are Macaly's published prose. What we read live was the auth posture and both OAuth descriptors.

Frequently asked questions

Which Macaly plan do I need for the MCP server?

The Pro plan, which starts at 25 dollars a month. Macaly's MCP documentation states the check applies per workspace, so every workspace a tool acts on must be on Pro. Calling a tool against a workspace on any other plan returns a FORBIDDEN error naming the plan as the reason. Only list_teams always works, so your agent can still discover which workspaces it may use.

Can my AI agent publish a Macaly app without me asking?

Macaly states publishing is never automatic and that the server instructs agents to call publish_app only when you explicitly ask to go live. That instruction is a server-side prompt to the model rather than a hard block, so it is a strong default rather than a guarantee. Building an app does not publish it, and apps are fully previewable before going live.

Can the connector delete a published Macaly app?

No. Macaly blocks deleting a published app over MCP entirely, and states you must unpublish it first. For unpublished apps, delete_app moves the app to trash rather than erasing it, and both delete_app and revert_to_edit are marked destructive so most clients ask you to confirm before running them.

Why does a Macaly MCP tool return FORBIDDEN?

The workspace you are acting on is not on a Pro plan, or you passed a teamId for a workspace you are not a member of. Macaly documents both causes on its MCP page. Because OAuth connects your whole account rather than one workspace, an agent can see workspaces it cannot act in, which is what produces this error.

Why does wait_for_build time out on my Macaly app?

Macaly states this is normal for bigger builds. The build keeps running server-side after the timeout, and the agent simply calls wait_for_build again to keep waiting. Builds are asynchronous by design, so create_app and send_message return immediately and the agent polls get_build_status or wait_for_build until the build finishes.

Can Macaly generate video or voiceover in an app built over MCP?

No. Macaly switches off AI video generation, music generation and text-to-speech for builds triggered through a connected MCP client, and says this keeps the connector within the media rules of the AI client directories it is distributed through. AI image generation and speech-to-text transcription stay available, and the limit does not apply when you work in Macaly directly.

Does connecting Macaly to Claude cost credits?

Yes. Macaly states every create_app and send_message consumes credits from the workspace it runs in, exactly as working in the Macaly editor does. The Pro plan starts at 10 million monthly credits for 25 dollars, credits do not roll over, and get_usage reports a workspace's balance so an agent can check before it builds.