Onchain GraphQL APIs & DEX APIs
HTTPS CORS apiKey
Blockchain
16 APIs available
Browse 16 free Blockchain APIs. Find the perfect API for your next project.
Showing 16 of 16 APIs
Multichain block explorer REST API (with Etherscan-compatible JSON-RPC)
HTTPS No CORS apiKey
Build hybrid smart contracts with Chainlink
HTTPS CORS ? Free
Chainpoint is a global network for anchoring data to the Bitcoin blockchain
HTTPS CORS ? Free
Cross-frontend DEX attribution and execution quality data across Ethereum and L2s
HTTPS CORS Free
Multi-blockchain data aggregator platform
HTTPS CORS ? apiKey
Ethereum explorer API
HTTPS CORS apiKey
Bilingual Web3 lessons, glossary search and role-based learning paths
HTTPS CORS Free
Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage
HTTPS CORS ? Free
Blockchain-as-a-service solution that provides high-quality connection via API
HTTPS CORS ? apiKey
Blockchain-based blogging and social media website
HTTP No CORS Free
Multi-chain blockchain RPC nodes (Ethereum, Solana and 75+ networks)
HTTPS CORS apiKey
Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets
HTTPS CORS Free
Indexing protocol for querying networks like Ethereum with GraphQL
HTTPS CORS ? apiKey
To retrieve Walltime's market info
HTTPS CORS ? Free
Provide simple and reliable API access to Ethereum blockchain
HTTPS CORS ? apiKey