5 Best Web3 Claude Connectors for On-Chain and Crypto Research

Web3 Claude connectors give Claude access to specialized blockchain and crypto data through the Model Context Protocol (MCP). This guide focuses on five connectors listed in Anthropic's official Claude Connectors Directory. Each supports a different workflow, from on-chain investigation and explorer research to market analysis and compliance screening. Connecting a service still requires users to sign in or authorize access, and available capabilities depend on the provider.

How We Selected These Web3 Claude Connectors

Every connector on this list meets three criteria:

• It is available in Anthropic's official directory, where connectors are reviewed for security, reliability, and compatibility.
• It supports a distinct, repeatable Web3 research task.
• Its current capabilities can be described clearly without implying functions such as trade execution that the connector does not provide.

Because these tools address different data layers, this is a practical shortlist rather than a feature-for-feature ranking. The best choice depends on the question Claude needs to answer.

The 5 Best Web3 Claude Connectors

1. InfStones Blockchain Intelligence: Natural-Language On-Chain Analysis

InfStones Blockchain Intelligence is designed for natural-language investigation of public data on Ethereum and BNB Chain. Its read-only tools can diagnose failed transactions, identify likely revert reasons, trace native and ERC-20 transfers, simulate contract interactions, estimate gas, and review contract verification and observable risk signals.

The connector can also retrieve wallet balances, token and NFT holdings, address history, token prices, and ENS records. It is most useful when a task requires interpreting on-chain activity rather than collecting a single raw record. It cannot access private keys, sign transactions, or move funds.

2. Blockscout: Multi-Chain Explorer Data

Blockscout brings multi-chain explorer data into Claude, including address activity, transaction logs, contract ABIs and metadata, and token or NFT holdings. It fits research where broad network coverage and direct access to explorer records matter most. Its role is to supply source-level blockchain information for investigation, verification, and custom analysis rather than focus on guided transaction failure diagnosis or contract-call simulation.

3. CoinDesk: Crypto Market Data and Indices

The CoinDesk Data and Indices connector provides live and historical digital asset data, including spot prices, regulated indices and benchmarks, futures and options data, funding rates, open interest, order-book depth, trade history, and crypto headlines. It is suited to cross-market research and market-structure analysis, which makes it distinct from connectors centered on wallet, transaction, or smart contract activity.

4. Crypto.com: Crypto Prices and Market Charts

Crypto.com provides a focused set of read-only market tools for real-time price quotes, daily price changes, order books, conversions, candlestick charts, and trading volume. It works well for quick token lookups and chart-based market checks. Compared with CoinDesk, its emphasis is straightforward market data rather than institutional benchmarks, derivatives analysis, and news research. The connector does not place trades.

5. Scorechain: Crypto AML and Compliance

Scorechain focuses on crypto AML and compliance research. It can help teams screen wallets and transactions for sanctions exposure, counterparty risk, and other compliance signals before conducting a deeper review. Unlike the other connectors in this list, its primary role is compliance triage rather than technical transaction analysis, explorer research, or market monitoring. Its results should support, not replace, an organization's formal compliance procedures.

Which Web3 Claude Connector Should You Choose?

Choose based on the primary data layer behind the question. InfStones fits Ethereum and BNB Chain transaction explanation, transfer tracing, contract simulation, and observable contract risk analysis. Blockscout is better suited to multi-chain explorer records. CoinDesk supports broad market and indices research, while Crypto.com handles quick price, order-book, and chart lookups. Scorechain is designed for AML and compliance screening.

These connectors can also work together when research crosses several layers. A team might inspect on-chain activity, check the market context around the same event, and then review relevant compliance signals. No single connector covers every Web3 workflow, so users should review each provider's permissions, terms, and supported capabilities before authorizing access. To try the on-chain analysis workflow, follow the InfStones Blockchain Intelligence tutorial to connect it and run a first query.