# Access custom fields API

**URL:** <https://community.servicem8.com/t/access-custom-fields-api/802>\
**Category:** API & SDK\
**Created:** [January 13, 2020, 4:26pm UTC](https://community.servicem8.com/t/access-custom-fields-api/802 "2020-01-13T16:26:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![developer](https://avatars.discourse-cdn.com/v4/letter/d/bcef8e/32.png) [@developer](https://community.servicem8.com/u/developer)\
**Post date:** [January 13, 2020, 4:26pm UTC](https://community.servicem8.com/t/access-custom-fields-api/802/1 "2020-01-13T16:26:22Z")

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**Originally posted by Richard Peacock**

I can happily read and write using the standard ServiceM8 API but when I try to simply list all custom fields using the API ([https://api.servicem8.com/custom\_fields\_1.0](https://api.servicem8.com/custom_fields_1.0)), I am told I am not authorised.