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title: Registering and Running Flex Gateway in Local Mode
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# Registering and Running Flex Gateway in Local Mode

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

Before you can use your Flex Gateway to configure API instances, you must register and start the
gateway.

There are three options for registering Flex Gateway in Local Mode:

- [Register and Run using a Username and Password](https://docs.mulesoft.com/gateway/1.12/flex-local-reg-run-up): If you have a username
  and password for Anypoint Platform, you can use these credentials to register your Flex Gateway.

- [Register and Run using a Connected App](https://docs.mulesoft.com/gateway/1.12/flex-local-reg-run-app): If you do not have a username or
  password for Anypoint Platform, you can use connected app credentials to register your Flex
  Gateway.

- [Register and Run using a Token](https://docs.mulesoft.com/gateway/1.12/flex-local-reg-run-token): If you do not have a username or
  password for Anypoint Platform, you can use a registration token generated by the Runtime Manager
  UI. The token is valid for four hours.