Bitquerygraphql.bitquery.io
Onchain GraphQL APIs & DEX APIs
API keyHTTPSCORS
Blockchain
17 APIs
Blockchain APIs give access to on-chain data and nodes: transactions, balances, token transfers, smart contract events and indexed queries. Hosted node providers save you from running your own node, but compare supported chains, request quotas and access to archive data. Keys for paid node access belong on the server.
Etherscan exposes Ethereum account and contract data with a key, The Graph indexes smart contract data for GraphQL queries, and Bitquery covers many chains through GraphQL. Covalent aggregates data across multiple blockchains, and Chainlink provides developer resources for connecting smart contracts to off-chain data.
Blockscoutdev.blockscout.com
Multichain block explorer REST API (with Etherscan-compatible JSON-RPC)
API keyHTTPSNo CORS
Chainlinkchain.link
Build hybrid smart contracts with Chainlink
No key HTTPSCORS ?
Chainpointtierion.com
Chainpoint is a global network for anchoring data to the Bitcoin blockchain
No key HTTPSCORS ?
ClearTracecleartracedata.com
Cross-frontend DEX attribution and execution quality data across Ethereum and L2s
No key HTTPSCORS
Covalentcovalenthq.com
Multi-blockchain data aggregator platform
API keyHTTPSCORS ?
Dwellirdwellir.com
RPC endpoints for 150+ blockchain networks, including Ethereum, Solana, Polkadot and Hyperliquid
API keyHTTPSCORS
Etherscanetherscan.io
Ethereum explorer API
API keyHTTPSCORS
Get Started with Web3github.com
Bilingual Web3 lessons, glossary search and role-based learning paths
No key HTTPSCORS
Heliumdocs.helium.com
Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage
No key HTTPSCORS ?
Nownodesnownodes.io
Blockchain-as-a-service solution that provides high-quality connection via API
API keyHTTPSCORS ?
Steemdevelopers.steem.io
Blockchain-based blogging and social media website
No key HTTP onlyNo CORS
SwiftNodesswiftnodes.io
Multi-chain blockchain RPC nodes (Ethereum, Solana and 75+ networks)
API keyHTTPSCORS
TWZRD Agent Intelintel.twzrd.xyz
Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets
No key HTTPSCORS
The Graphthegraph.com
Indexing protocol for querying networks like Ethereum with GraphQL
API keyHTTPSCORS ?
W
Walltimewalltime.info
To retrieve Walltime's market info
No key HTTPSCORS ?
Watchdatadocs.watchdata.io
Provide simple and reliable API access to Ethereum blockchain
API keyHTTPSCORS ?