AI Chat Applications

Configure popular AI chat applications to use LemonData’s OpenAI-compatible API

Overview

Most general AI chat apps connect to LemonData through the standard OpenAI-compatible chat path.

In practice that means:

• use https://api.lemondata.cc/v1 as the base URL unless the app explicitly asks for a full endpoint URL
• use your LemonData API key as the OpenAI-style API key
• pick models that the app can use in a standard chat workflow

General chat apps are usually chat-completions oriented, not Codex Responses WebSocket clients. For Codex CLI/App, Cursor, or other coding tools that need Responses-specific behavior, use the dedicated integration guides instead.

Type: Chat App

Primary Path: OpenAI-compatible chat-completions

Support Confidence: Supported path

Supported Applications

Application	Platform	Notes
Open WebUI	Web, Self-hosted	Popular self-hosted choice with OpenAI-compatible connections
LibreChat	Web, Self-hosted	Multi-provider chat workspace with custom OpenAI endpoints
LobeChat	Web, Desktop, Self-hosted	Strong custom-provider support
Cherry Studio	Windows, macOS, Linux	Good OpenAI-compatible provider flow
Chatbox	Windows, macOS, Linux	Simple OpenAI-compatible setup
TypingMind	Web, Desktop	Uses a custom endpoint style
NextChat	Web, Self-hosted	Lightweight ChatGPT-style client with base-URL overrides
ChatWise	Windows, macOS	Standard custom provider pattern

Default Connection Values

Field	Value
Base URL	https://api.lemondata.cc/v1
API Key	sk-your-lemondata-key
API Type	OpenAI Compatible

If an app asks for a full endpoint URL instead of a base URL, use:

• Chat Completions: https://api.lemondata.cc/v1/chat/completions

Example App Setups

LobeChat

Self-hosted LobeChat

OPENAI_API_KEY=sk-your-lemondata-key
OPENAI_PROXY_URL=https://api.lemondata.cc/v1

LobeChat Cloud

1. Open Settings → AI Service Provider
2. Select OpenAI
3. Enter your LemonData API key
4. Set the custom endpoint to https://api.lemondata.cc/v1

Cherry Studio

1. Open Settings → Model Provider
2. Add an OpenAI-compatible provider
3. Enter:
   • Name: LemonData
   • API Base URL: https://api.lemondata.cc/v1
   • API Key: sk-your-lemondata-key
4. Add the models you want to use

Chatbox

1. Open Settings → AI Model
2. Choose OpenAI API Compatible
3. Enter:
   • API Host: https://api.lemondata.cc/v1
   • API Key: sk-your-lemondata-key
   • Model: gpt-5-mini or gpt-4o

TypingMind

1. Open Settings
2. Choose Custom Endpoint
3. Enter:
   • Endpoint URL: https://api.lemondata.cc/v1/chat/completions
   • API Key: sk-your-lemondata-key
4. Configure the models you want to expose

Open WebUI

1. Open Admin Settings → Connections
2. Add an OpenAI-compatible connection
3. Enter:
   • Base URL: https://api.lemondata.cc/v1
   • API Key: sk-your-lemondata-key
4. Save and select the models you want to expose

LibreChat

Add an OpenAI-compatible endpoint in your LibreChat provider config and point it to:

customEndpoints:
  - name: LemonData
    apiKey: '${OPENAI_API_KEY}'
    baseURL: 'https://api.lemondata.cc/v1'
    models:
      default: ['gpt-5-mini', 'gpt-5.4', 'claude-sonnet-4-6']
      fetch: false

Safer Model Defaults

Category	Suggested Models
General default	gpt-5.4, gpt-5-mini, gpt-4o
Anthropic	claude-sonnet-4-6, claude-opus-4-6
Google	gemini-2.5-flash, gemini-2.5-pro
DeepSeek	deepseek-r1, deepseek-v3-2

Tips

Prefer base URL when the app supports it

Most apps are easier to configure and less fragile when you provide https://api.lemondata.cc/v1 as a base URL instead of a full endpoint URL.

Use smaller models first

Start with gpt-5-mini or gpt-4o for everyday chat, then move heavier reasoning tasks to gpt-5.4 or claude-opus-4-6.

Keep coding tools separate

General chat apps and coding agents often need different endpoint behavior. Keep Codex/Cursor-style tools on their dedicated integration pages.

Troubleshooting

Connection Error

• Verify the base URL is exactly https://api.lemondata.cc/v1
• Remove trailing slashes if the app auto-appends paths
• If the app wants a full endpoint URL, use https://api.lemondata.cc/v1/chat/completions

401 Unauthorized

• Double-check your API key
• Confirm the key is active in LemonData dashboard
• Make sure there are no extra spaces or line breaks

Model Not Available

• Verify the model name exactly
• Try a widely supported default like gpt-5-mini, gpt-4o, or claude-sonnet-4-6
• Check current availability in LemonData docs or dashboard