Desktop IDEs & AI Apps

Use Foldr with Zed (MCP)

Zed is the high-performance, collaborative code editor built in Rust by the team behind Atom. Zed's Assistant panel supports MCP servers as context providers and tool sources. Wiring Foldr lets Zed share snippets, screenshots, and repo artifacts without switching apps.

Zed IndustriesmacOS, LinuxMCP: beta

Installation

Add the Foldr MCP server to Zed with the snippet below. Replace fs_… with an API key from foldr.space/developers/signup. Each upload costs 5¢ - top up account credits or subscribe to Pro tier to bypass per-call charges.

{
  "context_servers": {
    "foldr": {
      "command": {
        "path": "npx",
        "args": ["-y", "@foldr/mcp-server"],
        "env": { "FOLDR_API_KEY": "fs_live_..." }
      }
    }
  }
}

Setup tip: Zed reads MCP servers from ~/.config/zed/settings.json under the "context_servers" key. Restart Zed after editing.

Official Zed MCP docs

What You Can Do

Upload any file from Zed to Foldr and get a permanent shareable URL back in the same turn (5¢ per upload, debited from credits)
Mint short-lived capability tokens to share files with downstream agents without leaking your API key
Organize uploads into per-API-key folders with hierarchical structure
Shorten long URLs to foldr.space/s/... links - free with any API key
Hand off build artifacts, screenshots, and logs to a URL without leaving your editor

Zed + Foldr FAQ

How do I install the Foldr MCP server in Zed?

Open Zed's MCP configuration (the JSON settings file) and paste the config block shown above. Set FOLDR_API_KEY to a key you create at foldr.space/developers/signup. Restart Zed if it doesn't hot-reload.

How much does it cost to use Foldr from Zed?

Each upload costs 5¢. You can pay by topping up account credits via the `top_up_credits` MCP tool (min $5) - every upload then debits from balance. Or subscribe to Pro tier ($25/mo) and per-call charges are bypassed entirely. Tools that don't write data (list_files, mint_capability, get_usage, etc.) are free.

I set the key but Zed says the Foldr tool isn't available - what's wrong?

Three common causes: (1) Zed wasn't restarted after editing the config - most MCP hosts need a restart to pick up new servers. (2) The API key is wrong or missing - verify the env var name your client reads (e.g. FOLDR_API_KEY) matches the config snippet above. (3) Your client doesn't support the streamable-http transport - most modern clients do, but check Zed's docs for the version that added MCP support.

Can Zed upload files directly to Foldr, or just generate URLs?

Zed can do both. The MCP server exposes tools for `upload_file` (base64-encoded file content), `bulk_upload` (up to 20 files in one call), `mint_capability` (short-lived shareable links), and `create_short_url`. Any file Zed can read from disk can be uploaded.

Is the Foldr MCP integration with Zed production-ready?

Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. Zed's MCP support is currently in public beta - suitable for day-to-day use. Every write endpoint accepts an Idempotency-Key so retries are safe.

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Connect Zed to Foldr in under a minute

Grab an API key, paste the snippet above into Zed's MCP config, top up credits (or grab a Pro subscription), and your agent can upload files and mint share links immediately.

Get your Foldr API key x402 details