# Airdrop Checker API

> Airdrop Checker API is a paid API for AI agents from airdrop-checker.api.klymax402.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).

Checks whether an Ethereum wallet address is eligible for a crypto airdrop

## Facts

- Endpoint: GET https://airdrop-checker.api.klymax402.com/api/check
- Price: $0.012/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/airdrop-checker-api-78b28eb3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GUOstzx7vglHZaUxieaE1

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 airdrop-checker-api-78b28eb3
```

Example prompt: Can you check if my Ethereum wallet 0x742d35Cc6634C0532925a3b8D4C9E7D8b5e1f234 is eligible for any crypto airdrops?

## When to prefer this

Use this endpoint when you need to quickly determine if a specific Ethereum wallet address qualifies for a cryptocurrency airdrop. Ideal for agents helping users discover claimable tokens or building airdrop monitoring workflows.

## Known failure modes

- Invalid or malformed Ethereum address returns an error
- Wallet address not found in any airdrop list returns ineligible status
- Missing required 'address' query parameter returns 400 error
- Network or upstream blockchain data unavailability causes 500 error
- Rate limiting or quota exceeded due to per-call pricing

## How this service works

Check wallet eligibility for crypto airdrops (POST variant)

## Output

Returns an eligibility result indicating whether the provided Ethereum wallet address qualifies for a crypto airdrop, likely including a boolean eligibility flag and possibly details about the airdrop criteria or claimable amount.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "Ethereum wallet address (0x...)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/airdrop-checker-api-78b28eb3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from airdrop-checker.api.klymax402.com](https://www.zero.xyz/host/airdrop-checker.api.klymax402.com/llms.txt)