Use Foldr with AutoGen (MCP)
AutoGen is Microsoft Research's multi-agent conversation framework used for complex planning and critique loops. AutoGen 0.4 introduced a tool adapter layer that includes MCP. Foldr plugs in as a shared tool all agents in a conversation can call to externalise results.
Installation
Add the Foldr MCP server to AutoGen 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 autogen-ext[mcp]
# Python
from autogen_ext.tools.mcp import StdioServerParams, mcp_server_tools
params = StdioServerParams(
command="npx",
args=["-y", "@foldr/mcp-server"],
env={"FOLDR_API_KEY": "fs_live_..."},
)
tools = await mcp_server_tools(params)What You Can Do
- Upload any file from AutoGen 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 AutoGen agent with a few lines of config
AutoGen + Foldr FAQ
How do I install the Foldr MCP server in AutoGen?
Open AutoGen'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 AutoGen if it doesn't hot-reload.
How much does it cost to use Foldr from AutoGen?
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 AutoGen says the Foldr tool isn't available - what's wrong?
Three common causes: (1) AutoGen 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 AutoGen's docs for the version that added MCP support.
Can AutoGen upload files directly to Foldr, or just generate URLs?
AutoGen 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 AutoGen can read from disk can be uploaded.
Is the Foldr MCP integration with AutoGen production-ready?
Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. AutoGen'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.
Related MCP Integrations
Connect AutoGen to Foldr in under a minute
Grab an API key, paste the snippet above into AutoGen's MCP config, top up credits (or grab a Pro subscription), and your agent can upload files and mint share links immediately.