Mobile

Use Foldr with ChatGPT iOS (MCP)

ChatGPT iOS is the most installed AI app on mobile. It shares Custom Connectors with the desktop client, so any MCP-compatible server set up on the web is available on your phone. Foldr on ChatGPT iOS is the fastest way to upload a camera-roll file and share a URL - no intermediate screenshots required.

OpenAIiOS, iPadOSMCP: beta

Installation

Add the Foldr MCP server to ChatGPT iOS 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.

chatgpt.com → Settings → Connectors → Add custom connector
Name:    Foldr
URL:     https://foldr.space/api/mcp
Auth:    Bearer  →  fs_live_...

(The connector syncs automatically to ChatGPT iOS.)

Setup tip: Custom Connectors are a Team/Business/Enterprise feature - ensure your workspace has them enabled.

Official ChatGPT iOS MCP docs

What You Can Do

Upload any file from ChatGPT iOS 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
Upload camera-roll files directly into Foldr from your phone

ChatGPT iOS + Foldr FAQ

How do I install the Foldr MCP server in ChatGPT iOS?

Open ChatGPT iOS'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 ChatGPT iOS if it doesn't hot-reload.

How much does it cost to use Foldr from ChatGPT iOS?

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 ChatGPT iOS says the Foldr tool isn't available - what's wrong?

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

Can ChatGPT iOS upload files directly to Foldr, or just generate URLs?

ChatGPT iOS 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`. On mobile, uploads use the device camera roll / share sheet via the remote MCP endpoint.

Is the Foldr MCP integration with ChatGPT iOS production-ready?

Foldr's MCP server is stable and used in production - streamable-http transport at https://foldr.space/api/mcp with 23 tools. ChatGPT iOS'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 ChatGPT iOS to Foldr in under a minute

Grab an API key, paste the snippet above into ChatGPT iOS'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