Ask Your Assistant for the Email. Get the HTML.
Postcards runs a public MCP server, so Claude, Cursor, and ChatGPT can reach your email projects directly. Browse folders, check what’s left of your export quota, pull finished HTML, and on paid plans have AI create or rework a template, all by asking in a sentence.
Included on every plan, the free Start plan included. See plans →
Nine tools your assistant can call- Works with the API key you already have
- Claude, Cursor, ChatGPT, Zed
- Export with your variables filled in
- Nothing can be renamed, moved, or deleted
- Revoke the key and access stops instantly
Nine things your assistant can do without leaving the chat
MCP is the open standard Anthropic published for connecting assistants to outside tools. Our server exposes nine, and the assistant picks the right one on its own.
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List your projects
Everything in the workspace, a page at a time, and filtered to one folder when you name it.
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Open one project
Pull the details for a single email once you know its id, either the numeric one or the short hex form.
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Browse the folders
Read the structure you already organized your work into, instead of hunting through a flat list.
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Look inside a folder
Ask what’s in Newsletters and get that folder’s projects back, paginated like the main list.
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Check the quota
Which plan is active, where the billing period sits, and how many exports you have left this month.
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Export the email
Render a project to HTML or a ZIP, with placeholder values supplied in the same request.
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Create a template
Describe the email and AI builds a new template in your Drafts. Paid plans, paid for with AI credits.
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Edit a project
Say what to change and AI reworks that project in place. Paid plans, paid for with AI credits.
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Remix a project
Get one or more variants of an email you already have, with the original left as it is. Paid plans, paid for with AI credits.
Connected in three steps
No separate MCP account, no second password. The server is a thin layer over the Postcards API, so your existing key is all it needs.
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1
Copy a key
Workspace Settings, API tab, create a key and copy it while it’s on screen. Already have one for the REST API? Use that.
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2
Add the server
Drop our endpoint into your client’s MCP settings with the key in the authorization header. Newer clients take the URL directly.
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3
Ask for something
“List my Postcards projects.” If the tools are wired up correctly, the answer comes back with your own work in it.
"postcards": {
"type": "http",
"url": "https://mcp-postcards.designmodo.com/mcp",
"headers": { "Authorization": "Bearer YOUR_KEY" }
}
No syntax to remember. Just ask.
You don’t name the tool or format the request. Describe what you want and the assistant works out which call to make.
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Finding things
Plain questions about your workspace. The assistant pages through the results itself when there are more than fit in one answer.
you type- List my Postcards projects.
- Which folders do I have?
- What’s in the Newsletters folder?
- Find the Black Friday email and show me its details.
- How many exports do I have left this month?
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Getting the HTML
Ask for an export and say what should replace the placeholders. The markup comes back ready to paste.
you type- Export the launch email as HTML with image hosting on.
- Export it again and replace
{{first_name}}with Alex and{{company}}with Acme. - Give me the same email as a ZIP with the images inside.
- Export the welcome email and set
{{coupon}}to SAVE20. - Check I have exports left, then export the Black Friday email.
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Creating with AI
On the paid plans, describe a new email or the change you want. Each request spends AI credits, the same as in the editor.
you type- Create a welcome email for a yoga studio.
- Create a product launch email using Ultra mode.
- In the Black Friday email, change the button to Shop the sale.
- Remix the launch email into three versions with different headlines.
- Remix the newsletter in a dark color scheme.
Whatever you already have open
Newer clients connect to the URL directly. Everything else reaches it through the standard stdio bridge, which is one extra line of configuration.
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Claude Desktop
Add the server to your Claude config file. Recent builds take the HTTP URL; older ones go through the bridge.
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Cursor
Native HTTP support from version 0.42 onward, so the endpoint and a header are the whole setup.
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ChatGPT and Zed
Register it as a custom connector in ChatGPT, or as a context server in Zed. Same URL, same key.
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Anything else
If your client speaks MCP but not HTTP yet, the stdio bridge covers it. Nothing about the server is proprietary.
An assistant with your projects, not with your permissions
There is no delete, no rename, and no move. Reading and exporting never change a project, and the AI tools only run on paid plans, when you ask for them.
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Edits only when you ask
Only the AI edit tool changes a project, and it overwrites it. Want to keep the original? Ask for a remix instead.
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Your key isn’t stored
It’s passed straight through to the API on each call. The server doesn’t log it and doesn’t keep a copy.
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The same rules apply
Team scoping, plan gating, rate limits, your export allowance, and AI credits apply exactly as they do in the app.
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Off in one click
Delete the key in your workspace settings and the next call from that client is refused. No other cleanup to do.
Building something that runs on its own?
MCP is for asking. When the work should happen on a schedule or inside your product, the same key drives the Postcards API directly.
MCP Questions
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What is the Postcards MCP server?
It is a public Model Context Protocol server that lets an AI assistant work with your Postcards projects. MCP is the open standard Anthropic published for connecting assistants to outside tools, and ours exposes nine of them.
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Which AI clients can connect to it?
Claude Desktop, Cursor, ChatGPT custom connectors, and Zed all connect over HTTP. Any other MCP-capable client can reach the same endpoint through the standard stdio bridge.
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What can my assistant actually do?
List your projects, open a single project, browse folders, look inside one folder, check your export quota, and export a project to HTML or a ZIP. On the paid plans it can also create a new template, edit a project, or remix one into variants with AI.
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Do I need a separate account or password?
No. The MCP server runs on top of the Postcards API and authenticates with the same API key. If you already made one for the REST API, reuse it.
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Can an assistant delete or change my emails?
Nothing on the server can delete, rename, or move a project, and reading or exporting never changes one. On the paid plans, the AI edit tool changes a project when you ask it to and overwrites that project, so ask for a remix if you want to keep the original.
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Which plans include MCP access?
All of them, including the free Start plan. The AI create, edit, and remix tools need a paid plan. Your export allowance still depends on your plan, and CDN-hosted assets remain a Pro feature.
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Is my API key stored on your MCP server?
It is not. The key is forwarded to the API with each request and is never logged or cached. Deleting the key in your workspace settings cuts off access immediately.
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What does AI generation through MCP cost?
It spends AI credits from your plan, the same as generating in the editor: at least 100 credits a request, most between about 250 and 1,500. If a request times out, check your projects before asking again, because it may have finished in the background.
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Are there limits on exports through MCP?
The same limits as the API: sixty read requests and ten exports a minute, drawn against your monthly export allowance. ZIP exports returned through MCP are capped at 5 MB, so bulk work is better done against the API directly.
Your assistant is already open. Give it your emails.
One key, one endpoint, and the next export is a sentence away instead of a download.
Included on every plan, the free Start plan included. See plans →
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