---
title: "Opportunity Lost Reason"
slug: "opportunity-lost-reason"
updated: 2025-08-26T18:10:08Z
published: 2025-08-26T18:38:28Z
canonical: "guide.youraspire.com/opportunity-lost-reason"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.youraspire.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Opportunity Lost Reason

## **Description**

Represents reasons why an opportunity was marked as lost. Useful for reporting and sales process analysis.

## Resource Overview

| **Endpoint** | **Definition** |
| --- | --- |
| GET/OpportunityLostReason | Retrieve a list of opportunity lost reasons. |
| [POST/OpportunityLostReason](/v1-api/apidocs/opportunitylostreasons-4) | Add a new reason for lost opportunities. |
| [PUT/OpportunityLostReason](/v1-api/apidocs/opportunitylostreasons-5) | Edit an existing lost reason, such as correcting a label or toggling the active status. |

## Attributes

| Attribute | Description | Data Type | Notes |
| --- | --- | --- | --- |
| OpportunityLostReasonID | Unique identifier | integer |  |
| OpportunityLostReasonName | Name of the lost reason | string | Max length: 100, Nullable |
| Active | Status of reason | boolean |  |
| CreatedByUserID | ID of creator | integer |  |
| CreatedByUserName | Name of creator | string | Max length: 101, Nullable |
| CreatedDateTime | Creation timestamp | datetime |  |
| LastModifiedByUserID | ID of last editor | integer | Nullable |
| LastModifiedByUserName | Name of last editor | string | Max length: 101, Nullable |
| LastModifiedDateTime | Last modified timestamp | datetime | Nullable |