# Genesis Hash Error while using Testnet API

**URL:** <https://forum.algorand.co/t/genesis-hash-error-while-using-testnet-api/6922>\
**Category:** General\
**Tags:** testnet\
**Created:** [May 19, 2022, 5:05pm UTC](https://forum.algorand.co/t/genesis-hash-error-while-using-testnet-api/6922 "2022-05-19T17:05:46Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![fabrice](https://avatars.discourse-cdn.com/v4/letter/f/5fc32e/32.png) [@fabrice](https://forum.algorand.co/u/fabrice)\
**Post date:** [June 2, 2022, 7:32pm UTC](https://forum.algorand.co/t/genesis-hash-error-while-using-testnet-api/6922/5 "2022-06-02T19:32:06Z")

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> [@Metataphysika](#):
>
> I don’t know about “msgpacktool” – is that part of goal?

It’s installed with the Algorand software, which also installs goal.

> [@Metataphysika](#):
>
> the Python SDK won’t let me use the Algoexplorer API because Algoexplorer doesn’t require a token, but the SDK class for making GET and POST requests requires you to enter a token.

See [Examples for python in algov2 - #6 by fabrice](https://forum.algorand.co/t/examples-for-python-in-algov2/3759/6)  
but please adapt to the new endpoints of algoexplorer, that is using [https://node.algoexplorerapi.io](https://node.algoexplorerapi.io) or equivalent.  
See [https://algoexplorer.io/api-dev/v2](https://algoexplorer.io/api-dev/v2)

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