ChatGPT

Add the Synchronity GPT (recommended)

The fastest way to shop with Synchronity in ChatGPT is the published GPT — no setup, no schema, no keys to paste.

Add Synchronity to ChatGPT →

Open the link, then Start chat. The first time you ask it to do something (search a store, build a cart, check out), ChatGPT will prompt you to sign in to Synchronity — a one-time email magic link. After that it can search connected stores, build carts, and complete checkouts with your approval.

Requires ChatGPT (a free account works for using a GPT; building/publishing GPTs needs Plus).

Hosted MCP connector (advanced)

ChatGPT also supports remote MCP servers natively. If you'd rather connect the raw tool surface as a custom connector, point it at:

https://api.synchronity.app/mcp

Authenticate with your Agent Identity Token (AIT) as a Bearer token in the connector config. ChatGPT negotiates the MCP handshake and surfaces the commerce tools directly.

What ChatGPT can do

Search products, compare across stores, build a cart, set shipping, and complete a real checkout — search_products, add_to_cart, execute_checkout, and more. ChatGPT plans the multi-step flow on its own; you don't need to name tools or steps.

Approving a purchase

Checkout and payment require your approval, not just the assistant's. When it's time to pay, Synchronity emails you a 6-digit code; you read it back to ChatGPT to approve. Synchronity never completes a purchase without that verified approval, and it only reports success once payment is confirmed.

Caveats

• The hosted MCP endpoint enforces per-AIT rate limits — reusing one token across many sessions may hit 429 too_many_requests. Provision separate agents for separate use cases.
• The published GPT handles auth for you; you never paste tokens or schemas into ChatGPT.