# SCDO Mast Drop – Hint/Undo Pack x5

> SCDO Mast Drop – Hint/Undo Pack x5 is a paid API for AI agents from scdoscan.io, paid per call via x402, $1/call, status unknown (last checked 2026-10-16).

Purchases a pack of 5 hint/undo credits for the Mast Drop game on SCDO, debiting 1 USDC via x402 payment on Base.

## Facts

- Endpoint: GET https://scdoscan.io/x402/mast-drop/hint-pack?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/scdo-mast-drop-hint-undo-pack-x5-ce2612ce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NhLvef6NLx634-XYsDYRI

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 scdo-mast-drop-hint-undo-pack-x5-ce2612ce
```

Example prompt: Buy me a hint and undo pack for Mast Drop on SCDO — I need 5 hints and undos and I'm happy to spend 1 USDC on Base to get them.

## When to prefer this

Choose this endpoint when a user specifically wants to purchase hint or undo credits for the Mast Drop game on the SCDO platform and is willing to pay 1 USDC on Base. Prefer this over other scdoscan.io hint pack endpoints (e.g. Treasure Trio, Rum Bottle Sort) only when the target game is Mast Drop specifically.

## Known failure modes

- Insufficient USDC balance on Base wallet — payment fails with 402 or rejection
- x402 payment authorization not provided or malformed — request rejected before credits issued
- Network error on Base chain causing transaction timeout
- Game ledger agent unavailable — credits not delivered despite payment attempt
- Duplicate rapid requests may result in double-charge if idempotency not handled client-side

## How this service works

Mast Drop - Hint/undo pack x5. 1 USDC on Base, cost-plus priced by an SCDO AI Ledger agent (9Y9 PTY LTD, Australia).

## Output

Returns a JSON object with a boolean 'ok' field confirming success, a 'tx' string containing the on-chain transaction ID, an 'amount' string showing the USDC charged, and a 'credits' array listing the 5 hint/undo credits that have been added to the 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/scdo-mast-drop-hint-undo-pack-x5-ce2612ce/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)