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-# How to Get a Wave Finance API Access Token
-
-Wave uses **OAuth 2.0** for API authentication. Follow these steps to register your application and obtain an access token.
-
----
-
-## Step 1: Create a Wave Developer Account
-
-1. Go to [https://developer.waveapps.com](https://developer.waveapps.com)
-2. Sign in with your Wave account (or create one at [waveapps.com](https://www.waveapps.com))
-3. You'll land on the Wave Developer Portal
-
----
-
-## Step 2: Register a New Application
-
-1. In the Developer Portal, click **"Create an Application"** (or navigate to My Applications → New Application)
-2. Fill in the application details:
-   - **Name**: e.g. `My MCP Integration`
-   - **Description**: Brief description of your use case
-   - **Redirect URI**: For local/personal use, you can use `http://localhost:8080/callback`
-3. Click **Save** / **Create**
-4. Wave will display your:
-   - **Client ID** — public identifier for your app
-   - **Client Secret** — keep this private!
-
----
-
-## Step 3: Authorize Your Wave Business
-
-Wave requires you to grant your application access to a specific Wave business. This is done via the OAuth 2.0 Authorization Code flow.
-
-### 3a. Build the Authorization URL
-
-Open this URL in your browser (replace `YOUR_CLIENT_ID` and `YOUR_REDIRECT_URI`):
-
-```
-https://api.waveapps.com/oauth2/authorize/?client_id=YOUR_CLIENT_ID&response_type=code&scope=account:*%20business:read%20business:write&redirect_uri=YOUR_REDIRECT_URI
-```
-
-**Recommended scopes:**
-| Scope | Purpose |
-|-------|---------|
-| `account:*` | Full account/user access |
-| `business:read` | Read businesses, customers, invoices |
-| `business:write` | Create/update customers, products, invoices |
-
-### 3b. Approve the Authorization
-
-1. You'll be redirected to a Wave login page
-2. Sign in with your Wave account
-3. Select the **business** you want to connect
-4. Click **Authorize**
-5. Wave redirects you back to your redirect URI with a `?code=XXXX` parameter in the URL
-
-**Copy the `code` value from the URL.** It expires in ~60 seconds.
-
----
-
-## Step 4: Exchange the Code for an Access Token
-
-Run this `curl` command in your terminal (replace the placeholder values):
-
-```bash
-curl -X POST "https://api.waveapps.com/oauth2/token/" \
-  -H "Content-Type: application/x-www-form-urlencoded" \
-  -d "client_id=YOUR_CLIENT_ID" \
-  -d "client_secret=YOUR_CLIENT_SECRET" \
-  -d "grant_type=authorization_code" \
-  -d "code=YOUR_AUTHORIZATION_CODE" \
-  -d "redirect_uri=YOUR_REDIRECT_URI"
-```
-
-**Response:**
-```json
-{
-  "access_token": "eyJhbGc...",
-  "token_type": "Bearer",
-  "expires_in": 3600,
-  "refresh_token": "def502...",
-  "scope": "account:* business:read business:write"
-}
-```
-
----
-
-## Step 5: Configure the MCP Server
-
-Add your access token to the `.env` file in the `mcp-gateway` directory:
-
-```env
-# Wave Finance
-WAVE_ACCESS_TOKEN=eyJhbGc...
-```
-
-Then rebuild and restart the Wave MCP service:
-
-```bash
-docker compose build wave-mcp
-docker compose up -d wave-mcp
-```
-
----
-
-## Step 6: Refresh Your Token (When It Expires)
-
-Access tokens expire after 1 hour. Use the refresh token to get a new one:
-
-```bash
-curl -X POST "https://api.waveapps.com/oauth2/token/" \
-  -H "Content-Type: application/x-www-form-urlencoded" \
-  -d "client_id=YOUR_CLIENT_ID" \
-  -d "client_secret=YOUR_CLIENT_SECRET" \
-  -d "grant_type=refresh_token" \
-  -d "refresh_token=YOUR_REFRESH_TOKEN"
-```
-
-> ⚠️ **Important**: Each refresh invalidates the previous refresh token. Store the new `refresh_token` from the response.
-
----
-
-## Verify It Works
-
-Test the token with a quick API call:
-
-```bash
-curl -X POST "https://gql.waveapps.com/graphql/public" \
-  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
-  -H "Content-Type: application/json" \
-  -d '{"query": "query { user { id defaultEmail } }"}'
-```
-
-Expected response:
-```json
-{
-  "data": {
-    "user": {
-      "id": "QnVzaW5lc3...",
-      "defaultEmail": "you@example.com"
-    }
-  }
-}
-```
-
----
-
-## Requirements
-
-> **Note**: The Wave API requires an active **Wave Pro** or **Wave Advisor** subscription on the business you're connecting. Free Wave accounts cannot use the API.
-
----
-
-## Troubleshooting
-
-| Error | Cause | Fix |
-|-------|-------|-----|
-| `401 Unauthorized` | Invalid or expired token | Refresh or re-authorize |
-| `403 Forbidden` | No active Pro subscription | Upgrade the Wave business |
-| `invalid_grant` | Authorization code expired | Re-authorize (Step 3–4) |
-| `invalid_client` | Wrong client ID/secret | Double-check credentials |