diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
new file mode 100644
index 0000000..75284ca
--- /dev/null
+++ b/.claude-plugin/marketplace.json
@@ -0,0 +1,37 @@
+{
+  "name": "posthog",
+  "owner": {
+    "name": "PostHog",
+    "email": "hey@posthog.com",
+    "url": "https://posthog.com"
+  },
+  "description": "Official PostHog plugin for AI clients. Access PostHog products directly from your AI coding tool.",
+  "plugins": [
+    {
+      "name": "posthog",
+      "displayName": "PostHog",
+      "source": "./",
+      "description": "Access PostHog analytics, feature flags, experiments, error tracking, and insights directly from your AI coding tool. Optionally capture Claude Code sessions to PostHog LLM Analytics.",
+      "version": "1.1.57",
+      "author": {
+        "name": "PostHog",
+        "email": "hey@posthog.com",
+        "url": "https://posthog.com"
+      },
+      "homepage": "https://posthog.com/docs/model-context-protocol",
+      "repository": "https://github.com/PostHog/ai-plugin",
+      "license": "MIT",
+      "category": "productivity",
+      "keywords": [
+        "analytics",
+        "feature-flags",
+        "experiments",
+        "error-tracking",
+        "a/b-testing",
+        "surveys",
+        "dashboards",
+        "llm-analytics"
+      ]
+    }
+  ]
+}
diff --git a/.github/workflows/sync-skills.yml b/.github/workflows/sync-skills.yml
index 03f0292..0a5b233 100644
--- a/.github/workflows/sync-skills.yml
+++ b/.github/workflows/sync-skills.yml
@@ -106,6 +106,13 @@ jobs:
             fi
           done
 
+          # Keep marketplace.json in sync with plugin.json
+          m=.claude-plugin/marketplace.json
+          if [ -f "$m" ]; then
+            jq --arg v "$(jq -r .version .claude-plugin/plugin.json)" \
+              '.plugins[0].version = $v' "$m" > "$m.tmp" && mv "$m.tmp" "$m"
+          fi
+
           # Regenerate Gemini TOML command files from MD sources
           if [ -x scripts/generate-gemini-commands.sh ]; then
             bash scripts/generate-gemini-commands.sh
diff --git a/README.md b/README.md
index 4835fac..ccb298e 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,12 @@ Official PostHog plugin for AI clients. Access PostHog products directly from yo
     claude plugin install posthog
     ```
 
+    Or install from this repo as a marketplace:
+    ```bash
+    claude plugin marketplace add PostHog/ai-plugin
+    claude plugin install posthog@posthog
+    ```
+
 2. Authenticate via OAuth:
     ```bash
     # Just enter Claude Code anywhere
@@ -70,6 +76,14 @@ gemini extensions install https://github.com/PostHog/ai-plugin
 
     On first use of a PostHog tool, Grok prompts you to authorize in your browser. Log into PostHog to connect.
 
+### Claude Cowork
+
+1. Add the marketplace: open **Settings** > **Plugins**, click **Add** > **Add marketplace**, enter `PostHog/ai-plugin`, and click **Sync**.
+
+2. Install the plugin: click **Browse**, select **PostHog**, and install. The plugin stays in sync with this repo automatically.
+
+3. Authenticate via OAuth: on first use of a PostHog tool, follow the browser prompts to log into PostHog.
+
 ## How to develop
 
 1. Clone and install the plugin: