Integrations

OpenAI-compatible apps

Use any OpenAI-compatible app, agent framework or library with a Lovely Router API key: set the base URL, the key and a model id.

Most apps, agent frameworks and libraries that call OpenAI can call Lovely Router. Lovely Router serves the OpenAI Chat Completions API at https://lovelyrouter.com/v1 for every text model, Claude and Gemini included, so one custom endpoint gives the app all of them. You need an API key first.

Settings#

Find the setting for a custom endpoint and enter:

Setting	Value
Base URL	`https://lovelyrouter.com/v1`
API key	your `lr-...` key
Model	any id from `GET /v1/models`, such as `gpt-6.1-sol` or `claude-sonnet-5.5`

If the app asks for an API host and appends /v1 itself, enter https://lovelyrouter.com without /v1.

Environment variables#

Tools built on the official OpenAI or Anthropic SDKs often read the base URL from the environment:

Shell

# OpenAI SDK based tools
export OPENAI_BASE_URL=https://lovelyrouter.com/v1
export OPENAI_API_KEY=$LOVELY_API_KEY

# Anthropic SDK based tools
export ANTHROPIC_BASE_URL=https://lovelyrouter.com
export ANTHROPIC_API_KEY=$LOVELY_API_KEY

Writing your own code? SDKs has client examples in Python and Node.js, and OpenAI Chat Completions covers streaming, function calling and what is supported.

Troubleshooting#

Symptom	Fix
`401` with `Missing API key`	The tool isn't sending the key. Check the variable name, and that you exported it in the shell that starts the tool.
`401` with `Invalid or revoked API key`	The key is mistyped, truncated or revoked. Paste it again, or create a new one.
`404` with `Model '...' is not available`	The model id doesn't exist. Copy an id from `GET /v1/models` or the model list.
`404` with `Unknown endpoint`	The tool is calling an API Lovely Router doesn't serve, such as embeddings or audio. Switch it to Chat Completions, the Responses API, or the Anthropic or Gemini format.
`404` with `not served in responses format`	The Responses API serves GPT models only. Pick a `gpt-*` model, or use Chat Completions for other models.
`404` on a path containing `/v1/v1/`	The app appends `/v1` itself. Use `https://lovelyrouter.com` as the host.
`402`	Your balance is empty or the key reached its spend limit. See Credits & billing.

Every other status is covered in Errors.