WordPress / API Reference
design_css_custom_inject
Tool tool. Add custom CSS to the WordPress site (Additional CSS in Customizer)
This is a read-only tool: it returns design css custom inject for your WordPress account. It changes nothing.
Ask Claude
You do not call this tool yourself. Ask for the outcome and the client picks the tool:
Design css custom inject in my WordPress account for [css].
It takes 1 required and 3 optional parameters.
Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
css | string | Yes | Css |
mode | string | No | Mode |
scope | string | No | Scope |
page_id | integer | No | Page Id |
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Before you can call it
This tool needs a connected WordPress account. The WordPress connect guide covers how to authorize it and what it unlocks, and the quickstart gets a client talking to the server in about five minutes.
Start free — 30 tool calls a month
No card required. Connect Google Ads, Meta Ads, GA4 or Search Console and ask Claude for the outcome — it picks the tool.