📦 Blockchain

Onchain GraphQL APIs & DEX APIs · Authentication: `apiKey` · HTTPS supported · CORS enabled

Multichain block explorer REST API (with Etherscan-compatible JSON-RPC) · Authentication: `apiKey` · HTTPS supported · CORS not supported

Build hybrid smart contracts with Chainlink · No authentication required · HTTPS supported · CORS not supported

Chainpoint is a global network for anchoring data to the Bitcoin blockchain · No authentication required · HTTPS supported · CORS not supported

Multi-blockchain data aggregator platform · Authentication: `apiKey` · HTTPS supported · CORS not supported

Ethereum explorer API · Authentication: `apiKey` · HTTPS supported · CORS enabled

Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage · No authentication required · HTTPS supported · CORS not supported

Blockchain-as-a-service solution that provides high-quality connection via API · Authentication: `apiKey` · HTTPS supported · CORS not supported

Blockchain-based blogging and social media website · No authentication required · HTTP only · CORS not supported

Indexing protocol for querying networks like Ethereum with GraphQL · Authentication: `apiKey` · HTTPS supported · CORS not supported

Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent w... · No authentication required · HTTPS supported · CORS enabled

To retrieve Walltime's market info · No authentication required · HTTPS supported · CORS not supported

Provide simple and reliable API access to Ethereum blockchain · Authentication: `apiKey` · HTTPS supported · CORS not supported