# Mempool API issue

**URL:** <https://community.umbrel.com/t/mempool-api-issue/4040>\
**Category:** Support and Troubleshooting\
**Created:** [October 15, 2021, 2:52am UTC](https://community.umbrel.com/t/mempool-api-issue/4040 "2021-10-15T02:52:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cryppyrc](https://avatars.discourse-cdn.com/v4/letter/c/6bbea6/32.png) [@cryppyrc](https://community.umbrel.com/u/cryppyrc)\
**Post date:** [October 15, 2021, 2:52am UTC](https://community.umbrel.com/t/mempool-api-issue/4040/1 "2021-10-15T02:52:36Z")

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Hi all,

After the recent Umbrel update, the Mempool API returns error message: **Cannot GET /api/v1/address** although Mempool is running and working. The update was done over 36 hours ago. Anybody experiencing similar issues and knows how to resolve this? I am running a number of functions that rely on the API so a quick fix is really imprortant to me.

Cheers

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<div class="post-metadata">

**Author:** ![DarthCoin](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.umbrel.com/darthcoin/32/1628_2.png) [@DarthCoin](https://community.umbrel.com/u/DarthCoin)\
**Post date:** [October 15, 2021, 5:35pm UTC](https://community.umbrel.com/t/mempool-api-issue/4040/2 "2021-10-15T17:35:53Z")

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Have lot of patience. After update Electrum server is re-indexing all blocks. Mempool app depends 100% on those indexes.  
Check electrs logs status using SSH see [trouibleshooting manual](http://community.umbrel.com/t/umbrel-troubleshooting-guide/3632/2) for command