Magic MCP vs Sendpaper
A side-by-side look at the Magic MCP and Sendpaper MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Magic MCP for architecture & design work as a local process; choose Sendpaper for delivery over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Magic MCP when
- You need dedicated capabilities in the Architecture & Design domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
TWENTY_FIRST_API_KEY, API_KEY_21ST.
Choose Sendpaper when
- You need dedicated capabilities in the Delivery domain.
- You prefer a remote HTTP/SSE transport.
- Its auth model fits you: No auth required.
- You want tools like
get_pricing, create_postcard, create_letter.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Architecture & Design | Delivery |
| Quality signal | 53/100 · Good | 59/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Remote HTTP/SSE |
| Auth | API key required | No auth required |
| Pricing | Paid service | Paid service |
| Required env vars | TWENTY_FIRST_API_KEYAPI_KEY_21ST | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 6,138 | 0 |
| Directory activity | 16 views 1 installs 0 upvotes | 1 views 0 installs 0 upvotes |
| Tools | Not listed | 6 |
| Full listing | View Magic MCP | View Sendpaper |
Tools & capabilities
Magic MCP tools
No tool names declared yet. Check the project README from the listing page.
Sendpaper tools 6
get_pricingList mail products and prices (USD, printing + USPS First-Class postage included, US addresses only).create_postcardCreate a postcard order (4x6, 6x9 or 6x11) and get a payment link. Front layouts: a big headline on a color, one photo, a photo with a caption, or a collage of 2-4 photos; the back carries the message (handwriting, serif or sans) and addresses. Set express for USPS Priority Mail (2-3 days, tracked). Mails only after the user pays.create_letterCreate a printed letter order (8.5x11, mailed in a #10 envelope) and get a payment link. Either write it (content.body, up to ~3 pages, optional photo) or mail the user's own PDF (content.pdf_url, a public https link, up to 6 pages). Set certified to "certified" for USPS Certified Mail with tracking and proof of delivery, or "certified_return_receipt" to add the recipient's signature; use these when the user needs proof (tax notice replies, lease notices, disputes, demand letters). Or set express for USPS Priority Mail (not with certified). Prices: get_pricing. Mails only after the user pays.pay_orderPay for an unpaid order with a Stripe shared payment token (spt_…) the user approved, scoped to at least the order amount in USD. For an order created with recipients, this pays for the whole group at once (scope the token to batch.price). On success the order is paid and goes to print. Use only after the user approved the purchase.get_orderGet the status of a postcard or letter order by id (ord_...).cancel_orderCancel an order that has not been paid yet. Paid orders can be cancelled by emailing support before they are printed.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Magic MCP
{
"mcpServers": {
"21st-dev-magic-mcp": {
"command": "npx",
"args": [
"-y",
"@21st-dev/cli@latest"
],
"env": {
"TWENTY_FIRST_API_KEY": "YOUR_TWENTY_FIRST_API_KEY_HERE",
"API_KEY_21ST": "YOUR_API_KEY_21ST_HERE"
}
}
}
}
Sendpaper
{
"mcpServers": {
"sendpaper": {
"url": "https://sendmypaper.com/mcp"
}
}
}
Frequently asked questions
Magic MCP is categorized under Architecture & Design and uses a local stdio subprocess. Sendpaper belongs to Delivery and uses a remote HTTP/SSE transport. Pick Magic MCP for architecture & design work and Sendpaper for delivery.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Magic MCP is listed as a paid service. Auth: api key required. Sendpaper is listed as a paid service. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add 21st-dev-magic-mcp and sendpaper as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Magic MCP has a quality signal of 53/100 (Good) with 16 views, 1 installs and 6,138 GitHub stars. Sendpaper has 59/100 (Good) with 1 views, 0 installs and 0 GitHub stars.