{
  "endpoint": "/v1/credits/topup",
  "note": "This endpoint accepts POST, not GET. Everything you need is below.",
  "how_to_call": {
    "call": "POST /v1/credits/topup",
    "headers": {
      "X-API-Key": "<your key>",
      "Content-Type": "application/json"
    },
    "body": {
      "method": "stripe",
      "amount": "<one of amounts_usd>"
    },
    "amounts_usd": [
      20,
      99
    ],
    "returns": "checkout_url \u2014 a Stripe link already bound to your key via client_reference_id, so credits post automatically on payment at $1 = 1 credit. No human step.",
    "crypto_topup": "USDC on Base available after sender verification and a current quote; see /v1/credits/crypto",
    "human_pricing_page": "https://kairossignal.com/pricing"
  },
  "start_here": "POST /v1/credits/register \u2014 $5 free credits, no card (first 3 keys per IP per 30 days).",
  "pricing": "https://kairossignal.com/v1/credits/pricing",
  "docs": "https://kairossignal.com/llms.txt"
}