Blockchain
On-chain data, wallets, and smart contracts.
13 APIs·6 need no auth
What you'd build
- Read wallet balances and transaction history
- Track NFT ownership and metadata
- Build block explorers and analytics
Data points you can pull
13 of 13 APIs
- Bitquery↗API key🔒 HTTPSCORS
Onchain GraphQL APIs & DEX APIs
- Blockscout↗API key🔒 HTTPSCORS
Multichain block explorer REST API (with Etherscan-compatible JSON-RPC)
- Chainlink↗No auth🔒 HTTPSCORS
Build hybrid smart contracts with Chainlink
- Chainpoint↗No auth🔒 HTTPSCORS
Chainpoint is a global network for anchoring data to the Bitcoin blockchain
- Covalent↗API key🔒 HTTPSCORS
Multi-blockchain data aggregator platform
- Etherscan↗API key🔒 HTTPSCORS
Ethereum explorer API
- Helium↗No auth🔒 HTTPSCORS
Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage
- Nownodes↗API key🔒 HTTPSCORS
Blockchain-as-a-service solution that provides high-quality connection via API
- Steem↗No authCORS
Blockchain-based blogging and social media website
- TWZRD Agent Intel↗No auth🔒 HTTPSCORS
Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets
- The Graph↗API key🔒 HTTPSCORS
Indexing protocol for querying networks like Ethereum with GraphQL
- Walltime↗No auth🔒 HTTPSCORS
To retrieve Walltime's market info
- Watchdata↗API key🔒 HTTPSCORS
Provide simple and reliable API access to Ethereum blockchain