check-crypto-address-balance
Installation
SKILL.md
Check Crypto Address Balance Skill
Query cryptocurrency address balances across multiple blockchains using free public APIs. Supports Bitcoin, Ethereum, BSC, Solana, Litecoin, and other major chains without requiring API keys for basic queries.
Supported chains & best free APIs
| Chain | API | Base URL | Rate limit | Notes |
|---|---|---|---|---|
| Bitcoin (BTC) | Blockchain.info | https://blockchain.info |
~1 req/10s | Most reliable, no key needed |
| Bitcoin (BTC) | Blockstream | https://blockstream.info/api |
Generous | Esplora API, open-source |
| Ethereum (ETH) | Etherscan | https://api.etherscan.io/api |
5 req/sec (free) | Optional key for higher limits |
| Ethereum (ETH) | Blockchair | https://api.blockchair.com |
30 req/min | Multi-chain support |
| BSC (BNB) | BscScan | https://api.bscscan.com/api |
5 req/sec (free) | Same API as Etherscan |
| Solana (SOL) | Public RPC | https://api.mainnet-beta.solana.com |
Varies by node | Free public nodes |
| Solana (SOL) | Solscan API | https://public-api.solscan.io |
10 req/sec | No key for basic queries |
| Litecoin (LTC) | BlockCypher | https://api.blockcypher.com/v1/ltc/main |
200 req/hr | Multi-chain API |
| Litecoin (LTC) | Chain.so | https://chain.so/api/v2 |
Generous | Simple JSON responses |
| Multi-chain | Blockchair | https://api.blockchair.com |
30 req/min | BTC, ETH, LTC, DOGE, BCH |