# Merging XFDF using the Express REST API

**URL:** <https://pdfjs.community/t/merging-xfdf-using-the-express-rest-api/105>\
**Category:** Technical Support\
**Created:** [July 1, 2020, 7:37am UTC](https://pdfjs.community/t/merging-xfdf-using-the-express-rest-api/105 "2020-07-01T07:37:22Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![jithinkp](https://avatars.discourse-cdn.com/v4/letter/j/ecae2f/32.png) [@jithinkp](https://pdfjs.community/u/jithinkp)\
**Post date:** [July 3, 2020, 11:09am UTC](https://pdfjs.community/t/merging-xfdf-using-the-express-rest-api/105/4 "2020-07-03T11:09:02Z")

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Hi Logan,

Yes now its working.But i have changed 1.75 mb pdf file and edit some content and requested to merge api.But i got error .“Internal server error” .Also when i try above 3mb pdf file igot another error HTTP content length exceeded 10485760 bytes.

 ![Annotation 2020-07-04 143948](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/92821353eeaab3bd46b043ef4992db9f2424321b.png)

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