Emerging / New

Use Foldr with Perplexity Desktop (MCP)

Perplexity Desktop is the dedicated macOS and Windows client for the Perplexity answer engine. Perplexity added "Connectors" in 2026 using an MCP-compatible surface so third-party tools can feed into research threads. Foldr lets you pull files hosted on foldr.space into a Perplexity thread or publish a Perplexity answer snapshot as a short URL.

PerplexitymacOS, WindowsMCP: beta

Installation

Add the Foldr MCP server to Perplexity Desktop 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.

Perplexity Desktop → Settings → Connectors → + New
Name:    Foldr
URL:     https://foldr.space/api/mcp
Auth:    API Key  →  fs_live_...

Setup tip: Requires Perplexity Pro or Enterprise. Beta - feature set evolving quickly.

Official Perplexity Desktop MCP docs

What You Can Do

Upload any file from Perplexity Desktop 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

Perplexity Desktop + Foldr FAQ

How do I install the Foldr MCP server in Perplexity Desktop?

Open Perplexity Desktop'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 Perplexity Desktop if it doesn't hot-reload.

How much does it cost to use Foldr from Perplexity Desktop?

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 Perplexity Desktop says the Foldr tool isn't available - what's wrong?

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

Can Perplexity Desktop upload files directly to Foldr, or just generate URLs?

Perplexity Desktop 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 Perplexity Desktop can read from disk can be uploaded.

Is the Foldr MCP integration with Perplexity Desktop production-ready?

Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. Perplexity Desktop'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.

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Connect Perplexity Desktop to Foldr in under a minute

Grab an API key, paste the snippet above into Perplexity Desktop'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