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

# Why Am I Receiving a 404 Error for Invoca URLs When Running Links Through a Scanning Tool?

> A URL referencing `pnapi_integration-latest.min.js` isn't a webpage link — it's an API call, and link scanners will flag it as a 404.

**Applies to:** Siteimprove and other third-party link scanning tools

A URL containing `pnapi_integration-latest.min.js` isn't an active hyperlink to a website — it's an API call made by the Invoca Library and Invoca Tag while swapping phone numbers. This call passes marketing data to Invoca's reports and provides a unique phone number to track the visitor's session.

If this PNAPI link snippet is included in a page scan, the third-party tool will likely return a 404, since it isn't a real page to visit.

## Where to go next

* [Deploying the Invoca Tag](/s/article/deploying-invoca-tag)
* [Tag Deployment Troubleshooting](/s/article/tag-deployment-troubleshooting)