~/CLIRank

Best Blockchain & Crypto APIs for AI Agents in 2026

Browse the top Blockchain & Crypto APIs used by developers worldwide. Below: the top 5 Blockchain & Crypto APIs by CLIRank score, the independent rubric for how well an API actually works with AI coding agents like Claude Code and Cursor.

1
Alchemy/10Blockchain Infrastructure

Blockchain development platform with node APIs, NFT tools, and enhanced APIs.

Best for: Best developer experience for Ethereum and EVM chains

query blockchainmanage NFTssend transactionstrack transfers
npm install alchemy-sdk
2
Moralis/10Web3 Data

Web3 data API for token prices, balances, NFTs, and DeFi across chains.

Best for: Best high-level Web3 APIs - NFT, token, DeFi data pre-indexed

get balancesget NFTsget token pricesresolve domains
npm install moralis
3
Infura/10Blockchain Nodes

Ethereum and IPFS node infrastructure API for blockchain applications.

Best for: Most established node provider - trusted by MetaMask

query blockchainsend transactionsmanage IPFSaccess archives
4
QuickNode/10Blockchain Nodes

Multi-chain blockchain node provider with enhanced APIs and marketplace add-ons.

Best for: Widest multi-chain support - 25+ blockchains

query blockchainsend transactionsNFT APIstoken APIs
5
Helius/10Solana Infrastructure

Solana-focused RPC and API platform with webhooks, DAS, and enhanced APIs.

Best for: Best Solana-specific infrastructure and APIs

query Solanamanage webhooksget NFT dataparse transactions
npm install helius-sdk

Frequently asked questions

What makes an Blockchain & Crypto API "agent-friendly"?

For AI coding agents, the highest-impact signals are: an official SDK on npm or PyPI, environment variable authentication (no browser OAuth flow), JSON responses that parse cleanly, machine-readable pricing, and reasonable rate limits for scripted use. APIs missing more than two of these are painful for agents to use reliably.

How do you score Blockchain & Crypto APIs?

Each API is rated on 8 signals worth 1-2 points each (11 raw, normalised to 10). The full rubric: official SDK (+2), env var auth (+2), headless compatible (+2), CLI tool (+1), JSON response (+1), curl/CLI docs examples (+1), reasonable rate limits (+1), machine-readable pricing (+1). The top-scoring API in this category right now is Alchemy at null/10.

Why isn't [my favourite API] on this list?

This list shows the top 5 Blockchain & Crypto APIs by score. The full ranking includes 5 APIs in this category. If yours is missing entirely, submit it at clirank.dev/submit - it gets auto-scored and added if it clears the threshold.

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