> ## Documentation Index
> Fetch the complete documentation index at: https://docs.weflayr.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Sync Revenue
> The Margin page needs your revenue per customer.
## Bring in your revenue
Bring it in from **Costs & revenue** in the sidebar, in any of the following ways:
* **Connect Stripe**: your issued invoices sync automatically, credit notes deducted. Revenue stays current with no manual uploads.
* **Upload a CSV**: export revenue from any billing system and map the columns to Weflayr fields yourself. Useful to backfill history or if you do not bill through Stripe.
* **Push via API**: push revenue programmatically, see the [Revenue API](/api/revenue).
Revenue and AI cost land on the same customer through the `customer_name` you stamp on your LLM calls when [propagating metadata](/quickstart#add-metadata-to-your-llm-calls-for-finer-analysis). With Stripe, you can pass it in two ways: use it as the Stripe customer **name** (default), or set it in a **`weflayr_customer_name`** metadata field on each Stripe customer. With a CSV, map the customer column to it.
## Internal projects: key metrics
On an [internal project](/internal-projects), this tab becomes **Upload your Key Metrics**: name your key metrics and upload their values per user as a CSV.
