> ## Documentation Index
> Fetch the complete documentation index at: https://help.lobyco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Inbound API with customer list

> Start a whole audience on a flow in one call.

*9 October 2026 · Orchestration*

You can now send a list of customers to an **Inbound API** block in one call. An external system, such as a CDP or data platform, sends a file with customer IDs to the block's URL. Everyone on the list enters the flow in a single run, ready to receive an Offer, Challenge or Game, as the flow guides. There is no longer one call per customer when the audience is built outside Nexus.

![A flow that starts with an Inbound API block named CDP starts Game, leading to a game and a banner](https://mintcdn.com/lobyco-4c9fb3ad/8XKQyo6M7ttG0QMR/images/release-notes/2026-10-09-inbound-api-with-customer-list-01.png?fit=max\&auto=format\&n=8XKQyo6M7ttG0QMR\&q=85\&s=725c094cfff8bce519de6e68d04f9bc0)

![The Inbound API block's Integration details step. The Per customer list section shows the endpoint URL, the HTTP headers and the file content](https://mintcdn.com/lobyco-4c9fb3ad/8XKQyo6M7ttG0QMR/images/release-notes/2026-10-09-inbound-api-with-customer-list-02.png?fit=max\&auto=format\&n=8XKQyo6M7ttG0QMR\&q=85\&s=52a418691701c50c3233dc06374b0e56)

## What's new

* **One block, two ways in** - the same Inbound API block and URL accept one customer, as before, or a file of many. Nothing changes on the canvas.
* **Integration details** section on the block tells you the URL and content of the call, ready to copy across to your external system.
* **Checked on arrival** - the file is checked while it uploads. The external system knows straight away if something is wrong, down to the row.

## Good to know

* Each inbound call adds those customers to the journey. When several calls contain the same customer, that customer enters the journey several times.

For more details, see the [Inbound API block Help Center guide](https://help.lobyco.com/business-documentation/campaigns/orchestration-canvas/block-reference.md#inbound-api).


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