{
    "message": "Chemicals API",
    "version": "1.0.0",
    "endpoints": {
        "GET \/api\/chemical\/cas\/{cas_number}": "Get chemical by CAS number",
        "GET \/api\/chemical\/search\/{name}": "Search chemicals by name",
        "GET \/api\/chemical": "List all chemicals (paginated)",
        "GET \/health": "Health check"
    }
}