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ChirpStack Application Server is an open-source LoRaWAN® Application Server, part of the ChirpStack LoRaWAN Network Server stack. For features related to the Network Server component, please refer to the ChirpStack Network Server documentation.

Payload encryption / decryption

ChirpStack Application Server handles the encryption and decryption of the application payloads. It also holds the application-key of each device and handles the join-accept in case of OTAA activation. This means that payloads will be sent decrypted to the integrations, but also that before payloads are sent to ChirpStack Network Server meaning the Network Server does not have access to these payloads.


ChirpStack Application Server offers a web-interface (built on top of the provided RESTful API). This web-interface can be used to manage users, organizations, applications and devices.

User authorization

Using ChirpStack Application Server, it is possible to grant users global admin permissions, make them admin of an organization or assign them view-only permissions within an organization. This makes it possible to run ChirpStack Application Server in a multi-tenant environment where each organization or team has access to only their own applications and devices.


For integration with external services, ChirpStack Application Server provides a gRPC and RESTFul API which exposes the same functionality as the web-interface.

Payloads and device events

ChirpStack Application Server provides different ways of sending and receiving device payloads (e.g. MQTT, HTTP, InfluxDB, ...). Please refer to Sending and receiving for all available integrations.

Note: downlink payloads can also be scheduled through the API.

Gateway discovery

For networks containing multiple gateways, ChirpStack Application Server provides a feature to test the gateway network coverage. By sending out periodical "pings" through each gateway, ChirpStack Application Server is able to discover how well these are received by other gateways in the same network. The collected data is displayed as a map in the web-interface.

This feature can be enabled and configured per Network Server.

Live frame-logging

With ChirpStack Application Server you are able to inspect all raw and encrypted LoRaWAN frames per gateway or device. When opening the LoRaWAN frames tab on the gateway or device detail page, you will see all frames passing in realtime. This will also allow you to inspect the (encrypted) content of each LoRaWAN frame. See Frame Logging for more information.

Live event-logging

With ChirpStack Application Server you are able to inspect all events from the web-interface, without the need to use a MQTT client or build an integration. When opening the Live event logs tab on the device detail pace, you will see all uplink, ack, join and error events in realtime. See Event Logging for more information.