Use Foldr with v0.dev (MCP)
v0 is Vercel's AI UI generator - you describe a screen, v0 writes the React/Tailwind code. v0 added "Integrations" in early 2026 that speak MCP so generated apps can reach external APIs while being scaffolded. Foldr is a natural integration - any v0 project that needs file uploads can call Foldr out of the box.
Installation
Add the Foldr MCP server to v0.dev 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.
v0.dev → Project → Integrations → + Add Select: Foldr (MCP) Paste: FOLDR_API_KEY = fs_live_... v0 will wire the client SDK into your generated code automatically.
Setup tip: Works best in v0 projects targeting Next.js App Router.
Official v0.dev MCP docsWhat You Can Do
- Upload any file from v0.dev 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
v0.dev + Foldr FAQ
How do I install the Foldr MCP server in v0.dev?
Open v0.dev'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 v0.dev if it doesn't hot-reload.
How much does it cost to use Foldr from v0.dev?
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 v0.dev says the Foldr tool isn't available - what's wrong?
Three common causes: (1) v0.dev 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 v0.dev's docs for the version that added MCP support.
Can v0.dev upload files directly to Foldr, or just generate URLs?
v0.dev 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 v0.dev can read from disk can be uploaded.
Is the Foldr MCP integration with v0.dev production-ready?
Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. v0.dev's MCP support is currently experimental - expect rough edges and breaking changes. Every write endpoint accepts an Idempotency-Key so retries are safe.
Related MCP Integrations
Connect v0.dev to Foldr in under a minute
Grab an API key, paste the snippet above into v0.dev's MCP config, top up credits (or grab a Pro subscription), and your agent can upload files and mint share links immediately.