# Kitten Stack - Tip (any amount)

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

Sends a tip of any chosen USDC amount to the Kitten Stack game via the x402 payment protocol on Base.

## Facts

- Endpoint: GET https://scdoscan.io/x402/kitten-stack/tip?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-tip-any-amount-744ce0f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eKlVVX3kxSRpyJ4OMlhRF

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-tip-any-amount-744ce0f5
```

Example prompt: Send a tip of 3 USDC to Kitten Stack using x402 on Base as a thank-you to the developer.

## When to prefer this

Choose this endpoint when you want to send a variable-amount USDC tip (any amount ≥ 1 USDC) to the Kitten Stack game specifically, using the x402 payment protocol on the Base network. Prefer this over fixed-item purchase endpoints (like item packs or coin packs) when the goal is a gratuitous tip or donation to the game developer rather than acquiring in-game items.

## Known failure modes

- Insufficient USDC balance — payment fails with payment-required or insufficient-funds error
- Amount below minimum (1 USDC) — rejected by the SCDO AI Ledger agent
- Network congestion on Base — transaction may be delayed or fail
- Invalid HTTP method used — only GET, HEAD, DELETE are accepted
- x402 payment handshake failure — agent or wallet not configured for x402 protocol

## How this service works

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

## Output

Returns a JSON object with ok (boolean success flag), tx (blockchain transaction hash on Base), amount (USDC amount tipped as string), and credits (array of any credited items or records associated with the tip).

## 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"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "amount": {
       "type": "string",
       "description": "USDC amount (min 1)"
      }
     }
    },
    "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-tip-any-amount-744ce0f5/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)