# Onboarding a Proxy Directory Operator onto Nexus

## The PDO must provide Nexus with reference data on the available address types and input fields <a href="#toc163730933" id="toc163730933"></a>

Nexus needs to be aware of the different [address types](/addressing-and-proxy-resolution/address-types-and-inputs/address-types.md) (such as IBAN, account, mobile) and [address inputs](/addressing-and-proxy-resolution/address-types-and-inputs/address-inputs.md) available in each country, so that it can provide this information to Source PSPs through the Nexus APIs. Therefore, when a new IPSO (or proxy service) is onboarded with Nexus, the IPSO must provide Nexus with reference data describing each address type and the input fields (address inputs) for that address type. This information can be provided via the Nexus Service Desk or APIs.

The IPS Operator is responsible for ensuring that the data is kept up to date.

## PDO must onboard with the local IPS Operator <a href="#toc163730934" id="toc163730934"></a>

The Nexus Scheme expects the IPS Operator to take on the responsibility for connecting its instance of the Nexus Gateway to the domestic proxy directory, particularly where:

* The IPS Operator and the PDO are the same entity, AND/OR
* In each country that the IPS Operator provides payment services to, there is only one PDO

{% hint style="warning" %}
Cases where there are multiple IPSOs or multiple Proxy Directories in a particular country or jurisdiction may need to be handled differently. The approach to this scenario will be developed in a future phase of Nexus development.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.nexusglobalpayments.org/addressing-and-proxy-resolution/role-of-the-proxy-directory-operator-pdo/onboarding-a-proxy-directory-operator-onto-nexus.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.