# Server API

- [Getting Started](https://docs.keyless.io/consumer/server-api/getting-started.md): This API allows for backend-to-backend communication between your backend and the Keyless servers.
- [Users](https://docs.keyless.io/consumer/server-api/users.md): This set of API calls allows you to make operations on various Keyless users.
- [External User ID](https://docs.keyless.io/consumer/server-api/external-users.md): This set of API calls allows you to perform operations to Create, Modify, Delete and Retrieve External User IDs
- [Devices](https://docs.keyless.io/consumer/server-api/devices.md): This set of API calls allows you to fetch and manipulate Keyless enabled devices.
- [Operations](https://docs.keyless.io/consumer/server-api/operations.md): This set of API calls allows you to fetch operations on various Keyless entities.
- [Telemetry](https://docs.keyless.io/consumer/server-api/telemetry.md): This API calls allows you to retrieve meta data related to a user or specific transaction.


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