# Any MCP client (https://sellersheetai.com/docs/start/clients/other)

> Any client that speaks MCP over Streamable HTTP works — the URL, the transport, and the two ways to sign in.



Any client that speaks MCP over Streamable HTTP works.

## Prerequisites [#prerequisites]

* A SellerSheet account with a connected store — [Connect your store](/docs/start/connect).
* A client that speaks MCP over Streamable HTTP.
* For a headless client, an [API key](/docs/mcp-api/keys).

## Step 1: Copy the SellerSheet MCP URL [#step-1-copy-the-sellersheet-mcp-url]

```text
https://sellersheetai.com/mcp
```

## Step 2: Add SellerSheet in your client [#step-2-add-sellersheet-in-your-client]

* **URL** `https://sellersheetai.com/mcp`, transport Streamable HTTP (`"type": "http"` or `"streamableHttp"` in most configs).
* **Interactive clients** sign in with OAuth 2.0 + PKCE: the server answers the first request with 401 and points the client at `/.well-known/oauth-authorization-server`; the client opens the browser.
* **Headless clients** send `Authorization: Bearer <your key>`.

## Step 3: Sign in and test [#step-3-sign-in-and-test]

1. Sign in in the browser when your client opens it — or, headless, send the key.
2. Ask: "Which stores can you see?" Your agent calls `get_user_context` and lists your store refs, such as <StoreRef />, with your plan and each store's status. Every session should start there.

Test a key from a terminal:

```bash
curl -sS https://sellersheetai.com/mcp \
  -H "Authorization: Bearer $SELLERSHEET_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
```

## Troubleshooting [#troubleshooting]

### "Unauthorized" (401) [#unauthorized-401]

Your sign-in or key expired or was deleted. Sign in again, or create a new key.

### The browser never opens [#the-browser-never-opens]

Update the client — older versions don't support MCP sign-in — or use an [API key](/docs/mcp-api/keys).

### "No stores" [#no-stores]

Connect a store first: [Connect your store](/docs/start/connect).

### Tools time out [#tools-time-out]

Some Amazon reports take a minute or two. Raise your client's MCP tool timeout.

More in [Troubleshooting](/help/troubleshooting/ai). Next: [Install the skills](/docs/start/skills), or [try the prompt library](/docs/start/prompts).