# URL for files larger then 5.5mb, merge api call

**URL:** <https://pdfjs.community/t/url-for-files-larger-then-5-5mb-merge-api-call/1290>\
**Category:** Technical Support\
**Created:** [January 11, 2022, 5:05pm UTC](https://pdfjs.community/t/url-for-files-larger-then-5-5mb-merge-api-call/1290 "2022-01-11T17:05:40Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [January 11, 2022, 5:05pm UTC](https://pdfjs.community/t/url-for-files-larger-then-5-5mb-merge-api-call/1290/3 "2022-01-11T17:05:44Z")

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**Hello, I’m Ron, an automated tech support bot 🤖**

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:
- [PDF.js Express API Errors - Network errors](https://pdfjs.express/documentation/utils/errors#network-errors)
- [Set XFDF using the Express REST API - Body params](https://pdfjs.express/documentation/utils/set#body-params)
- [Merge & extract annotation in PDF.js Express - Getting started](https://pdfjs.express/documentation/annotation/merge-and-extract#getting-started)

APIs:
- [Caveats](https://pdfjs.express/api/utils/index.html#__anchor)
- [Core.Annotations - setCustomSerializeHandler(annotationClass, serializeHandler)](https://pdfjs.express/api/Core.Annotations.html#.setCustomSerializeHandler__anchor)
- [Core.Document - mergeDocument(source [, position])](https://pdfjs.express/api/Core.Document.html#mergeDocument__anchor)

Forums:
- [Merge XFDF and file data gets error with large file](https://pdfjs.community/t/merge-xfdf-and-file-data-gets-error-with-large-file/767/3)
- [Merging XFDF using the Express REST API length exceeded error](https://pdfjs.community/t/merging-xfdf-using-the-express-rest-api-length-exceeded-error/185/2)
- [How to restrict accessing ip address through your Rest API?](https://pdfjs.community/t/how-to-restrict-accessing-ip-address-through-your-rest-api/592/1)

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