3xpl
Enables LLMs to query data from 48 blockchains via MCP.
Install & Use
Copy this prompt and send it to your AI assistant (Claude / Cursor / TRAE / Codex / WorkBuddy etc.) to auto-install:
Help me install this AI Skill: 3xpl. It is used for: Enables LLMs to query data from 48 blockchains via MCP. Full Skill content: https://321skill.com/skills/3xpl/raw/index.md Read that page and install it.
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This Skill addresses the issue where AI assistants cannot directly access real-time on-chain data. In practical development, developers often need LLMs to query blockchain transactions, address balances, block information, etc., but the lack of a unified, standardized interface typically requires manually writing API call code or relying on third-party middleware.
Usage is straightforward: you only need to install and configure the 3xpl API key. Afterward, you can query any supported blockchain data using natural language instructions, such as "Get the latest Ethereum block height" or "Query the balance of this address on Polygon." The system will automatically call the corresponding MCP tool and return structured results.
It is ideal for teams or individuals needing to integrate blockchain data into AI workflows, especially developers already using AI coding assistants like Claude or Cursor that support the MCP protocol and wish to quickly implement on-chain data queries, address analysis, transaction tracking, and other functions.
It is recommended to use this tool uniformly when developing DeFi analytics tools, on-chain monitoring systems, or agent applications. Note that it primarily relies on 3xpl.com's JSON API; the free tier has rate limits, and a paid plan is recommended for high-frequency queries.
Key Features
Unlike blockchain data APIs such as Covalent or The Graph, 3xpl is provided directly as an MCP server, enabling native LLM calls without additional middleware. It also covers 48 blockchains at once, eliminating the need for per-chain configuration.
Limitations
Requires an API key from 3xpl.com. The free tier has per-minute request limits, and all queries depend on network connectivity, making it unavailable offline.
FAQ
Which blockchains are supported?
It supports 48 mainstream blockchains, including Ethereum, Polygon, Solana, BSC, etc. The specific list can be viewed via the `list_blockchains_and_modules` tool.
Is payment required?
Basic functionality is free, but the free tier has rate limits. For high-frequency use or commercial scenarios, purchasing a paid API plan from 3xpl is recommended.
Installation guide for AI assistants
If your AI coding assistant (Claude Code, Cursor, TRAE etc.) can see this page, send it this message to auto-install:
Visit https://321skill.com/skills/3xpl/raw/index.md to read the original Skill definition (Markdown format) for 3xpl, and install it according to the instructions.
Raw Markdown URL for AI: /skills/3xpl/raw/index.md