---
title: add_custom_parameter (Python agent API)
source: https://docs.newrelic.com/docs/apm/agents/python-agent/python-agent-api/legacy-apis-python-agent-api/addcustomparameter-python-agent-api
---

> #### ⚠️ CAUTION
>
> This API was deprecated in version 8.3.0 and completely removed in version 11.0.0. Please use [`add_custom_attribute`](https://docs.newrelic.com/docs/apm/agents/python-agent/python-agent-api/addcustomattribute-python-agent-api) instead.