{
  "markdown": "# Airdrop Checker API\n\n[![MCP Server](https://img.shields.io/badge/MCP-server-blue)](https://airdrop-checker.api.klymax402.com/mcp)\n[![x402](https://img.shields.io/badge/payments-x402-6E56CF)](https://x402.org)\n[![License: MIT](https://img.shields.io/badge/license-MIT-green)](LICENSE)\n\nCheck wallet eligibility for active crypto airdrops -- token, value, deadline, claim URL via Etherscan. Pay-per-call via [x402](https://x402.org) (USDC on Base L2) -- no API key, no signup, no rate-limit wall.\n\nPart of the [klymax402](https://klymax402.com) marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.\n\n## Quickstart -- MCP\n\nAdd to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):\n\n```json\n{\n  \"mcpServers\": {\n    \"airdrop-checker\": {\n      \"url\": \"https://airdrop-checker.api.klymax402.com/mcp\"\n    }\n  }\n}\n```\n\n## Quickstart -- HTTP (x402)\n\n```bash\ncurl \"https://airdrop-checker.api.klymax402.com/api/check?address=0x0000000000000000000000000000000000dEaD\"\n# -> 402 Payment Required, with an x402 payment challenge in the response body\n```\n\nAny x402-aware client ([`@x402/fetch`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/x402-agent-tools), ATXP) handles the 402 -> sign -> retry cycle automatically.\n\n## Tools\n\n| Tool | Method | Path | Price | Description |\n|---|---|---|---|---|\n| `crypto_check_airdrops` | GET | `/api/check` | $0.012 | Check wallet eligibility for crypto airdrops |\n| `crypto_check_airdrops` | POST | `/api/check` | $0.012 | Check wallet eligibility for crypto airdrops (POST variant) |\n\n### `crypto_check_airdrops`\n\nUse this when you need to check if a wallet address is eligible for crypto airdrops. Scans wallet interactions against known airdrop contracts and returns eligible claims.\n\n**Parameters**\n\n| Name | Type | Required | Description |\n|---|---|---|---|\n| `address` | string | yes | Ethereum wallet address (0x...) |\n\n**Returns**\n\n- `eligible` -- array of airdrops the wallet qualifies for\n- `totalEligible` -- number of eligible airdrops found\n- `totalEstimatedValue` -- combined estimated USD value of all eligible airdrops\n- `walletAddress` -- the address checked\n- `checkedAt` -- timestamp of the check\n\nExample response:\n\n```json\n{\"eligible\":[{\"tokenName\":\"LayerZero\",\"tokenSymbol\":\"ZRO\",\"estimatedValueUsd\":450,\"deadline\":\"2026-06-30T00:00:00Z\",\"claimUrl\":\"https://claim.layerzero.network\",\"status\":\"claimable\"}],\"totalEligible\":3,\"totalEstimatedValue\":1250,\"walletAddress\":\"0x742d...\",\"checkedAt\":\"2026-04-13T12:00:00Z\"}\n```\n\n**When to use**: discovering unclaimed airdrops, monitoring multiple wallets for eligibility, or building airdrop farming dashboards.\n\n### `crypto_check_airdrops`\n\nUse this when you need to check if a wallet address is eligible for crypto airdrops. Scans wallet interactions against known airdrop contracts and returns eligible claims. POST variant of crypto_check_airdrops -- same params passed as JSON body instead of query string.\n\n**Parameters**\n\n| Name | Type | Required | Description |\n|---|---|---|---|\n| `address` | string | yes | Ethereum wallet address (0x...) |\n\n**Returns**\n\n- `eligible` -- array of airdrops the wallet qualifies for\n- `totalEligible` -- number of eligible airdrops found\n- `totalEstimatedValue` -- combined estimated USD value of all eligible airdrops\n- `walletAddress` -- the address checked\n- `checkedAt` -- timestamp of the check\n\nExample response:\n\n```json\n{\"eligible\":[{\"tokenName\":\"LayerZero\",\"tokenSymbol\":\"ZRO\",\"estimatedValueUsd\":450,\"deadline\":\"2026-06-30T00:00:00Z\",\"claimUrl\":\"https://claim.layerzero.network\",\"status\":\"claimable\"}],\"totalEligible\":3,\"totalEstimatedValue\":1250,\"walletAddress\":\"0x742d...\",\"checkedAt\":\"2026-04-13T12:00:00Z\"}\n```\n\n**When to use**: discovering unclaimed airdrops, monitoring multiple wallets for eligibility, or building airdrop farming dashboards.\n\n## Example agent prompts\n\n- \"Check if a wallet address is eligible for crypto airdrops\"\n- \"Check if a wallet address is eligible for crypto airdrops\"\n\n## Payment\n\n- Protocol: [x402](https://x402.org) -- HTTP-native pay-per-call, no signup, no API key\n- Network: Base L2 (`eip155:8453`)\n- Asset: USDC\n- Facilitator: Coinbase CDP (primary), PayAI (fallback)\n\n## Part of klymax402\n\n100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.\n\n- Catalog: https://klymax402.com/llms.txt\n- Full API reference: https://klymax402.com/llms-full.txt\n- Live stats: https://klymax402.com/stats\n\n## License\n\nMIT\n",
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  "repo_slug": "br0ski777/airdrop-checker-x402",
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}