Blockchain APIs

15 API records with directory-reported descriptions, access facts, and source links.

Bitquery

Onchain GraphQL APIs & DEX APIs

Blockchain · API key · HTTPS

Multichain block explorer REST API (with Etherscan-compatible JSON-RPC)

Blockchain · API key · HTTPS

Build hybrid smart contracts with Chainlink

Blockchain · No auth · HTTPS

Chainpoint is a global network for anchoring data to the Bitcoin blockchain

Blockchain · No auth · HTTPS

Cross-frontend DEX attribution and execution quality data across Ethereum and L2s

Blockchain · No auth · HTTPS

Multi-blockchain data aggregator platform

Blockchain · API key · HTTPS

Ethereum explorer API

Blockchain · API key · HTTPS

Bilingual Web3 lessons, glossary search and role-based learning paths

Blockchain · No auth · HTTPS

Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage

Blockchain · No auth · HTTPS

Blockchain-as-a-service solution that provides high-quality connection via API

Blockchain · API key · HTTPS

Blockchain-based blogging and social media website

Blockchain · No auth · HTTPS not confirmed

Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets

Blockchain · No auth · HTTPS

Indexing protocol for querying networks like Ethereum with GraphQL

Blockchain · API key · HTTPS

To retrieve Walltime's market info

Blockchain · No auth · HTTPS

Provide simple and reliable API access to Ethereum blockchain

Blockchain · API key · HTTPS