# Risk Service

The Risk Service provides clients monitoring abilities to aid in fraud prevention and risk mitigation. The Risk Service consists of a robust set of rules and a series of APIs (Score, Retrieve Scores and Updating Scores) that enable real-time risk scoring on transaction based on layers of rules defined. The Risk Service API requires [Basic Authentication](/gettingstarted#basic-authentication).
 
 
__The URL to the production server is `https://api.nelnetpay.com/psd/risk`__

Version: 2025.04.03.0

## Servers

UAT
```
https://api.uat.nelnetpay.com/psd/risk
```

## Security

### basicAuth

Basic Authentication Username & Password

Type: http
Scheme: basic

## Download OpenAPI description

[Risk Service](https://docs.nelnetpay.com/_spec/apis/risk-api-spec.yaml)

## Other

### Update a Previously Scored Transaction

 - [POST /update](https://docs.nelnetpay.com/apis/risk-api-spec/other/update.md): Perform a request to update a previously scored transaction. 

This endpoint uses a valid Basic Authentication username and password for authentication.


### Evaluates a Transaction for Risk Scoring Purposes

 - [POST /score](https://docs.nelnetpay.com/apis/risk-api-spec/other/score.md): Perform a request to evaluate a transaction for risk scoring purposes. 

This endpoint uses a valid Basic Authentication username and password for authentication.


### Retrieve a Previously Scored Transaction by Risk Uuid

 - [GET /score/{uuid}](https://docs.nelnetpay.com/apis/risk-api-spec/other/read.md): Perform a request to retrieve a previously scored transaction by risk uuid. 

This endpoint uses a valid Basic Authentication username and password for authentication.