Use Foldr with Fleur (MCP)
Fleur is a community-built macOS menu-bar app that makes it trivially easy to install and manage MCP servers for any Claude-compatible client. Fleur is basically a package manager for MCP. Foldr is listed in Fleur's registry so one-click install is possible.
Installation
Add the Foldr MCP server to Fleur 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.
1. Install Fleur: https://www.fleurmcp.com 2. Open Fleur from the menu bar 3. Search: "Foldr" 4. Click Install → paste your FOLDR_API_KEY 5. Fleur wires the server into Claude Desktop automatically.
What You Can Do
- Upload any file from Fleur 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
Fleur + Foldr FAQ
How do I install the Foldr MCP server in Fleur?
Open Fleur's MCP configuration (Settings → Connectors / Integrations) and paste the config block shown above. Set FOLDR_API_KEY to a key you create at foldr.space/developers/signup. Restart Fleur if it doesn't hot-reload.
How much does it cost to use Foldr from Fleur?
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 Fleur says the Foldr tool isn't available - what's wrong?
Three common causes: (1) Fleur 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 Fleur's docs for the version that added MCP support.
Can Fleur upload files directly to Foldr, or just generate URLs?
Fleur 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 Fleur can read from disk can be uploaded.
Is the Foldr MCP integration with Fleur production-ready?
Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. Fleur's MCP support is currently community-maintained - check the upstream repo for current status. Every write endpoint accepts an Idempotency-Key so retries are safe.
Related MCP Integrations
Connect Fleur to Foldr in under a minute
Grab an API key, paste the snippet above into Fleur's MCP config, top up credits (or grab a Pro subscription), and your agent can upload files and mint share links immediately.