# x402node Airdrop Eligibility & Balance Checker

> x402node Airdrop Eligibility & Balance Checker is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).

Checks whether a given wallet address has claimed or holds a specific airdrop/token contract balance on EVM chains, returning the token symbol and formatted amount.

## Facts

- Endpoint: GET https://api.x402node.dev/chain/airdrop-check?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402node-airdrop-eligibility-balance-checker-1dfc11d3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yT0K1v7Rl-1IqicPNox01

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 x402node-airdrop-eligibility-balance-checker-1dfc11d3
```

Example prompt: Can you check if the wallet 0xAbc123...def has claimed or holds any tokens from the airdrop contract 0xToken456...789 on Ethereum mainnet — tell me the token symbol and how many tokens it has?

## When to prefer this

Use this endpoint when you need to quickly verify airdrop eligibility or claim status for a specific wallet+contract pair on EVM chains, especially when you also want the formatted token symbol and balance in a single call. Prefer this over generic balance checkers when the specific use case is airdrop/claim verification.

## Known failure modes

- Invalid wallet address format — returns error or empty result
- Invalid or unrecognized token contract address — may return zero balance or error
- Unsupported EVM chain — endpoint may reject the request
- Wallet has no interaction with the contract — returns zero balance or unclaimed status
- Network timeout or RPC node unavailability — returns error

## How this service works

Check whether a wallet holds or has claimed a specific airdrop/token contract balance on EVM chains, with symbol and formatted amount. airdrop check, claim eligibility, token balance check, airdrop claimed, wallet holdings Accepts payment on Base or Solana — either network works.

## Output

Returns the wallet's airdrop/token status including: whether the wallet has claimed or holds tokens from the specified contract, the token symbol, and the formatted human-readable token balance 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",
      "contract"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "description": "ethereum, base (default), arbitrum, optimism, polygon"
      },
      "token": {
       "type": "string",
       "description": "ERC20 contract address (optional)"
      },
      "address": {
       "type": "string",
       "description": "Wallet to check (required)"
      },
      "contract": {
       "type": "string",
       "description": "Airdrop/token contract address (required)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402node-airdrop-eligibility-balance-checker-1dfc11d3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)