---
title: "RisuAI API: FreeTheAI Custom API Setup"
description: "Set up FreeTheAI in RisuAI with the Custom API model: URL, key, request model, and the Force Plain Fetch setting the web version needs."
url: https://freetheai.org/setup/risuai
language: en
updated: 2026-09-29
---

# RisuAI API: FreeTheAI Custom API Setup

RisuAI connects through its Custom API model (OpenAI Compatible format). On the web version, turn on Force Plain Fetch so requests go straight to FreeTheAI.

## Settings

- Model: `Custom API`
- URL: `https://api.freetheai.org/v1/chat/completions`
- Key/Password: `your FreeTheAI key (ftai_..., 53 characters)`
- Request Model: `glm-5.3`
- Format: `OpenAI Compatible`

## Steps

1. **Open the bot settings.** Open Settings (gear), then Chat Bot.
2. **Choose Custom API.** Set the model to Custom API and the format to OpenAI Compatible.
3. **Fill in the connection.** Enter the URL, your key in Key/Password, and a model ID in Request Model, using the values above.
4. **Web version only: Force Plain Fetch.** Go to Settings, Advanced Settings, turn on Show Unrecommended Settings, then turn on Force Plain Fetch. Without it RisuAI sends requests through its own relay, which FreeTheAI does not accept.

## Tips

- A base URL ending in /v1 also works; RisuAI adds /chat/completions.
- The desktop and mobile apps do not need Force Plain Fetch.

## Troubleshooting

**RisuAI says relay_not_supported. How do I fix it?**

Turn on Force Plain Fetch under Settings, Advanced Settings (after enabling Show Unrecommended Settings). RisuAI then calls FreeTheAI directly from your browser.

**Which model should I use?**

glm-5.3 is a strong default for roleplay. See freetheai.org/models for every model and its price.

Checked: Checked against RisuAI's source (Custom API model, request URL handling, Force Plain Fetch) on 2026-09-29.