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Blockchain APIs

Browse blockchain APIs by access requirements and source. Open a provider guide to compare authentication, documentation, and usage conditions before integrating.

15APIs to explore

Showing 1–15 of 15 APIs

Community listing
Blockchain

Bitquery

Onchain GraphQL APIs & DEX APIs

Reported: API keyCheck pricing
Community listing
Blockchain

Blockscout

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

Reported: API keyCheck pricing
Community listing
Blockchain

Chainlink

Build hybrid smart contracts with Chainlink

◇ Reported: No keyCheck pricing
Community listing
Blockchain

Chainpoint

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

◇ Reported: No keyCheck pricing
Community listing
Blockchain

ClearTrace

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

◇ Reported: No keyCheck pricing
Community listing
Blockchain

Covalent

Multi-blockchain data aggregator platform

Reported: API keyCheck pricing
Community listing
Blockchain

Etherscan

Ethereum explorer API

Reported: API keyCheck pricing
Community listing
Blockchain

Get Started with Web3

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

◇ Reported: No keyCheck pricing
Community listing
Blockchain

Helium

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

◇ Reported: No keyCheck pricing
Community listing
Blockchain

Nownodes

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

Reported: API keyCheck pricing
Community listing
Blockchain

Steem

Blockchain-based blogging and social media website

◇ Reported: No keyCheck pricing
Community listing
Blockchain

TWZRD Agent Intel

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

◇ Reported: No keyCheck pricing
Community listing
Blockchain

The Graph

Indexing protocol for querying networks like Ethereum with GraphQL

Reported: API keyCheck pricing
Community listing
Blockchain

Walltime

To retrieve Walltime's market info

◇ Reported: No keyCheck pricing
Community listing
Blockchain

Watchdata

Provide simple and reliable API access to Ethereum blockchain

Reported: API keyCheck pricing
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Know what’s been checked. Reviewed guides include provider documentation and examples. Community listings contain reported information that may have changed. Our methodology →