{"name":"billing","description":"Buy or change an ElysianPrimus plan. Send your API key as 'Authorization: Bearer <key>'.","routes":{"checkout":"POST /v1/checkout {\"plan\": \"starter\" | \"pro\"}","credits":"POST /v1/credits {\"usd\": 10..1000} ($1 buys 1000 calls)","portal":"POST /v1/portal"}}