> For the complete documentation index, see [llms.txt](https://docs.energyweb.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.energyweb.org/legacy-documentation/solutions-2023/open-charging-network/use-the-ocn-service-interface/sign-up-for-an-ocn-service.md).

# Sign up for an OCN Service

If an OCN user wants to make use a particular OCN Service, it has to agree on to the Service's permissions. The OCN Node tied to the customer will automate any such required permissions, lessening the cost of integration with a service

To make use of an OCN OCN Service via the OCN Service Interface, make sure the following pre-requisites are met

1. [You have an OCN Identity](/legacy-documentation/solutions-2023/open-charging-network/create-and-manage-an-ocn-identity.md)
2. [Your backend is connected to the OCN](/legacy-documentation/solutions-2023/open-charging-network/connect-an-ocpi-ocn-party-to-a-node/1.-make-your-backend-service-ocn-ready.md)
3. Your preferred OCN Service is connected to the OCN

**You are now ready to give the OCN Service its required permissions.**

Learn more about how to do that on our [OCN Registry repository](https://github.com/energywebfoundation/ocn-registry).

{% hint style="info" %}
Access the full OCN technical documentation [here](https://shareandcharge.com/wp-content/uploads/2020/11/OCN-Documentation-v1.1.pdf).
{% endhint %}


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