Desktop IDEs & AI Apps

Use Foldr with Cline (MCP)

Cline is an open-source autonomous coding agent that runs as a VS Code extension, pairing with any LLM provider. Cline was one of the earliest community tools to ship robust MCP support and even includes an MCP marketplace. Foldr fits naturally alongside its file-system and browser tools - it is the "send it out to the internet" primitive Cline was missing.

Cline teamVS Code (all platforms)MCP: stable

Installation

Add the Foldr MCP server to Cline 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.

{
  "mcpServers": {
    "foldr": {
      "command": "npx",
      "args": ["-y", "@foldr/mcp-server"],
      "env": { "FOLDR_API_KEY": "fs_live_..." },
      "disabled": false,
      "autoApprove": ["upload_file", "shorten_url"]
    }
  }
}

Setup tip: Click the MCP Servers icon in the Cline sidebar → "Configure MCP Servers" and paste the config. Cline hot-reloads on save.

Official Cline MCP docs

What You Can Do

Upload any file from Cline 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

Cline + Foldr FAQ

How do I install the Foldr MCP server in Cline?

Open Cline'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 Cline if it doesn't hot-reload.

How much does it cost to use Foldr from Cline?

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 Cline says the Foldr tool isn't available - what's wrong?

Three common causes: (1) Cline 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 Cline's docs for the version that added MCP support.

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

Cline 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 Cline can read from disk can be uploaded.

Is the Foldr MCP integration with Cline production-ready?

Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. Cline's MCP support is currently stable and generally available. Every write endpoint accepts an Idempotency-Key so retries are safe.

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Connect Cline to Foldr in under a minute

Grab an API key, paste the snippet above into Cline'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