Desktop IDEs & AI Apps

Use Foldr with Roo Code (MCP)

Roo Code is a community fork of Cline focused on multi-mode agents (Architect, Code, Ask, Debug). It shares Cline's MCP implementation and UI for managing servers. Foldr slots in as the "ship output" tool across every mode - Roo can upload architecture diagrams, debug logs, or test reports and hand back a URL.

Roo Code (OSS)VS CodeMCP: stable

Installation

Add the Foldr MCP server to Roo Code 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_..." }
    }
  }
}

Setup tip: Open Roo Code → MCP Servers tab → Edit Global MCP Settings.

Official Roo Code MCP docs

What You Can Do

Upload any file from Roo Code 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

Roo Code + Foldr FAQ

How do I install the Foldr MCP server in Roo Code?

Open Roo Code'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 Roo Code if it doesn't hot-reload.

How much does it cost to use Foldr from Roo Code?

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

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

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

Roo Code 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 Roo Code can read from disk can be uploaded.

Is the Foldr MCP integration with Roo Code production-ready?

Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. Roo Code'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 Roo Code to Foldr in under a minute

Grab an API key, paste the snippet above into Roo Code'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