Connect your tools to Lumen

Lumen exposes an OpenAI-compatible API at https://lumen.computes.illinois.edu/v1. Create an API key on your profile, then make it available to your tools as the LUMEN_API_KEY environment variable:

export LUMEN_API_KEY="sk_…"      # macOS / Linux
setx LUMEN_API_KEY "sk_…"        # Windows (new terminals)

The examples below use a generic MODEL placeholder. Log in to fill them in with the models you can access.

Model (for the curl & Python examples)

Configured with every model you can access. Uses {env:LUMEN_API_KEY} for the key.

Where to put this file:

macOS / Linux: ~/.config/opencode/opencode.json
Windows: %USERPROFILE%\.config\opencode\opencode.json
Or save opencode.json in a project's root directory for per-project settings.

Uses the ellmer package. The snippet's credentials function reads your key from the LUMEN_API_KEY environment variable — set it with usethis::edit_r_environ() (add LUMEN_API_KEY="sk_…", save, then restart R), or export it before starting R.

Read the Connect guide for more detail.