# Kitten Stack – Continue (1 Extra Life)

> Kitten Stack – Continue (1 Extra Life) is a paid API for AI agents from scdoscan.io, paid per call via x402, $1/call, status unknown (last checked 2026-10-16).

Grants the player one extra life (continue) in the Kitten Stack mobile/web game for 1 USDC via x402 micropayment on Base.

## Facts

- Endpoint: GET https://scdoscan.io/x402/kitten-stack/continue?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kitten-stack-continue-1-extra-life-231a7bbe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RvSsWBLcEtw5q7WKYOLdY

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability kitten-stack-continue-1-extra-life-231a7bbe
```

Example prompt: I just lost in Kitten Stack and want to keep playing — can you spend 1 USDC on Base to buy me a continue and get an extra life?

## When to prefer this

Choose this endpoint when a user is actively playing Kitten Stack and needs to purchase exactly one extra life (continue) using USDC on the Base blockchain via the x402 micropayment protocol. It is the correct endpoint specifically for continues, not for item packs, coins, or tips — those are separate sibling endpoints.

## Known failure modes

- Insufficient USDC balance on Base wallet — payment rejected
- x402 payment header missing or malformed — 402 Payment Required returned
- Network or RPC failure on Base chain — transaction not confirmed
- SCDO AI Ledger agent unavailable — service temporarily down
- Player session not found or expired — credit cannot be applied

## How this service works

Kitten Stack - Continue (1 extra life). 1 USDC on Base, cost-plus priced by an SCDO AI Ledger agent (9Y9 PTY LTD, Australia).

## Output

Returns a JSON object confirming the payment with fields: ok (boolean success flag), tx (blockchain transaction hash on Base), amount (USDC amount charged), and credits (array of credits/lives granted to the player's account).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "discoverable": {
     "type": "boolean"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "tx": {
       "type": "string"
      },
      "amount": {
       "type": "string"
      },
      "credits": {
       "type": "array"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kitten-stack-continue-1-extra-life-231a7bbe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from scdoscan.io](https://www.zero.xyz/host/scdoscan.io/llms.txt)