Use Foldr with CrewAI (MCP)
CrewAI is the multi-agent orchestration framework that popularised "role-based agents" - each agent has a persona, goals, and tools. CrewAI's `crewai-tools` package includes an `MCPServerAdapter` that loads MCP servers as shared tools across a crew. Foldr is perfect for the "publisher" role in a content or research crew.
Installation
Add the Foldr MCP server to CrewAI 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.
pip install "crewai-tools[mcp]"
# Python
from crewai_tools import MCPServerAdapter
foldr = MCPServerAdapter({
"command": "npx",
"args": ["-y", "@foldr/mcp-server"],
"env": {"FOLDR_API_KEY": "fs_live_..."},
})
# pass foldr.tools into any Agent(tools=...)What You Can Do
- Upload any file from CrewAI 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
- Wire Foldr tools into any existing CrewAI agent with a few lines of config
CrewAI + Foldr FAQ
How do I install the Foldr MCP server in CrewAI?
Open CrewAI's MCP configuration (the CLI) and paste the config block shown above. Set FOLDR_API_KEY to a key you create at foldr.space/developers/signup. Restart CrewAI if it doesn't hot-reload.
How much does it cost to use Foldr from CrewAI?
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 CrewAI says the Foldr tool isn't available - what's wrong?
Three common causes: (1) CrewAI 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 CrewAI's docs for the version that added MCP support.
Can CrewAI upload files directly to Foldr, or just generate URLs?
CrewAI 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 CrewAI can read from disk can be uploaded.
Is the Foldr MCP integration with CrewAI production-ready?
Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. CrewAI's MCP support is currently stable and generally available. Every write endpoint accepts an Idempotency-Key so retries are safe.
Related MCP Integrations
Connect CrewAI to Foldr in under a minute
Grab an API key, paste the snippet above into CrewAI's MCP config, top up credits (or grab a Pro subscription), and your agent can upload files and mint share links immediately.