Add Supermetrics as a marketing analytics connector to the marketing plugin (#123)

Author: bartschneider

marketing/.mcp.json

@@ -36,6 +36,10 @@
       "type": "http",
       "url": "https://mcp.klaviyo.com/mcp"
     },
+    "supermetrics": {
+      "type": "http",
+      "url": "https://mcp.supermetrics.com/mcp"
+    },
     "google-calendar": {
       "type": "http",
       "url": "https://gcal.mcp.claude.com/mcp"

marketing/CONNECTORS.md

@@ -17,3 +17,4 @@ Plugins are **tool-agnostic** — they describe workflows in terms of categories
 | Knowledge base | `~~knowledge base` | Notion | Confluence, Guru |
 | SEO | `~~SEO` | Ahrefs, Similarweb | Semrush, Moz |
 | Email marketing | `~~email marketing` | Klaviyo | Mailchimp, Brevo, Customer.io |
+| Marketing analytics | `~~marketing analytics` | Supermetrics | Google Analytics, Mailchimp, Semrush |

marketing/README.md

@@ -86,3 +86,4 @@ This plugin works with the following MCP servers:
 - **Ahrefs** — SEO keyword research, backlink analysis, and site audits
 - **Similarweb** — Competitive traffic analysis and market benchmarking
 - **Klaviyo** — Draft and review email marketing sequences and campaigns
+- **Supermetrics** — Pull marketing data from multiple platforms for analytics and reporting

marketing/skills/performance-report/SKILL.md

@@ -26,6 +26,7 @@ User runs `/performance-report` or asks for a marketing report, performance anal
 2. **Time period** — the reporting window (last week, last month, last quarter, custom date range)
 
 3. **Data source**:
+   - If ~~marketing analytics is connected, discover what accounts and platforms are available, then pull performance data automatically
    - If ~~product analytics is connected: pull performance data automatically
    - If not connected: ask the user to provide metrics. Prompt with: "Please paste or share your performance data. I can work with spreadsheets, CSV data, dashboard screenshots described in text, or just the key numbers."