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--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ![Autumn](assets/github_hero.png)
 
-[Autumn](https://useautumn.com) is an open-source layer between Stripe and your application, allowing you to create any pricing model and embed it within minutes. On Autumn you can build:
+[Autumn](https://useautumn.com) is an open-source layer between Stripe and your application, allowing you to create any pricing model and embed it with a couple lines of code. On Autumn you can build:
 - Subscriptions
 - Credit systems & top ups
 - Usage-based models & overages
@@ -13,3 +13,82 @@ All this without having to handle webhooks, upgrades/downgrades, cancellations o
 **Docs**: https://docs.useautumn.com
 
 ## How it works
+
+### 1. Define your products and plans in Autumn
+
+Create your products in Autumn's dashboard, and set the available features for each product. 
+
+![Autumn Product](assets/products.png)
+
+Features can be `boolean`, which are used to enable/disable features. Or, they can be `metered`, for tracking usage-based aspects of your product.
+
+![Autumn Feature](assets/features.png)
+
+You define the level of granularity you want: whether that's 1 single boolean feature flag (eg: `pro-features`) to enable all your paid features, or splitting them each into their own feature. 
+
+Once defined, you can check if a user has access to any of the defined features with a simple API call from your codebase.
+
+### 2. Embed the products in your application
+There are only 2 functions you need to call from your codebase:
+
+1. `/entitled` - check if a user has access to a feature
+2. `/events` - *(optional)* track the usage of metered features
+
+```javascript
+// 1. Check if a user has access to a feature
+const response = await fetch('https://api.useautumn.com/v1/entitled', {
+  method: "POST",
+  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
+  body: JSON.stringify({
+    "customer_id": "my_personal_id",
+    "feature_id": "premium_msg"
+  })
+})
+
+// 2. Check if user is allowed
+let data = await response.json()
+if (!data.allowed) {
+  throw new Error(`feature not allowed`)
+}
+
+// 3. Send event if user accesses feature
+await fetch('https://api.useautumn.com/v1/events', {
+  method: "POST",
+  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
+  body: JSON.stringify({
+    "customer_id": "my_personal_id",
+    "event_name": "premium_msg"
+  })
+})
+```
+
+No need to handle any customer logic. You can use your own customer IDs, and if the customer doesn't exist in Autumn, they'll be created automatically (and assigned any default plans).
+
+### 3. Attach a product to a customer on purchase
+
+Whenever a customer attempts to purchase a product, you can assign it to them using the `/attach` function. If the card is not on file, Autumn will return a Stripe checkout URL to collect payment. 
+
+Otherwise, it will automatically handle any upgrade, downgrade or pro-ration logic.
+
+```javascript
+const response = await fetch('https://api.useautumn.com/v1/attach', {
+  method: "POST",
+  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
+  body: JSON.stringify({
+    "customer_id": "my_personal_id",
+    "product_id": "prod_2rwydCAcuUp913PqoZwOjpy4aDM"
+  })
+})
+
+const data = await response.json()
+
+if (data.checkout_url) {
+  // Redirect user to checkout_url
+}
+```
+
+## Congratulations!
+
+You've embedded a full billing system into your application within a few minutes. You can make any pricing model changes you need, or handle custom plans without needing to alter your codebase.
+
+Feel free to self-host Autumn, or use our hosted version at https://useautumn.com. And let us know any questions, thoughts or feedback at hey@useautumn.com.
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