"Information about the MERN stack (MongoDB, Express, React, Node.js)" matching MCP servers:

MCP server for Circle's Agent Stack. Create wallets, set spend policies, send USDC, and pay x402-priced endpoints — all from a tool call.

Enables querying indexed blockchain data via subgraph GraphQL queries, part of the Pipeworx MCP gateway.

An MCP server that lets AI agents autonomously buy physical hats using USDC on Base — no credit card, no checkout, no human required. Browse the catalog, get a real-time shipping quote, send crypto, and we ship the hat.

Reasoning-puzzle arcade for AI agents with seven generated puzzle families, free samples, automatic answer checking, and ranked play from $0.02 USDC on Base via x402. Connect through MCP or HTTP. Browse and try samples without a wallet; run paid tools locally with an explicit spending limit.

498 MCP tools across 12 industry verticals. Marketplace, escrow, DeFi, legal, healthcare, insurance, construction, and trades. USDC payments on Base L2.

On-chain crypto indicators (EMA, RSI, VWAP, Bollinger) via Chainlink oracles.

9-tool MCP server for the anchor-x402 commodity services: dual-chain hash anchoring (Base + Solana), OFAC sanctions screening, signed decision attestation, mainnet tx decode, ENS/SNS name resolution, USD spot price, EVM calldata decode, datetime parser, and bundled wallet intelligence. Agents pay $0.001–$0.010 USDC per call directly from a Base wallet via x402 — no API keys, no accounts.

AI-to-AI marketplace MCP server with 46 tools — swap 65+ crypto tokens on 7 chains, rent GPUs, trade 25 tokenized stocks, on-chain escrow (Solana + Base), DeFi yields, sentiment analysis, wallet monitoring, and image generation. Supports USDC payments across 14 blockchains.

Enables Claude to autonomously purchase business location data and pay for it with USDC on Base via x402, while enforcing per-call and per-session spending limits.

Enables AI agents to interact with the Lido protocol for ETH staking, position management, and governance participation across Ethereum and L2 networks. It provides tools for querying balances, simulating transactions, and executing complex workflows like withdrawals and DAO voting through a safety-first interface.

A comprehensive MCP server providing unified access to over 144 tools for lending, trading, and staking across six major DeFi protocols on the Stacks Bitcoin Layer 2. It enables AI agents to perform complex blockchain operations and interact with the DeFi ecosystem using natural language commands.

Provides curated, meaningful information about Voi ecosystem protocols, applications, assets, and names, enabling identification and search through natural language.

An MCP server that provides a semantic layer for the Voi ecosystem, translating raw blockchain data into human-readable information about protocols, applications, and assets. It enables users to identify contract roles, resolve enVoi names, and explore curated registry data for ecosystem services like HumbleSwap and Nautilus.

A TypeScript/Node.js server that enables creating, deploying, and bridging Omnichain Fungible Tokens (OFTs) across multiple blockchains using LayerZero protocols.

A MCP server for interacting with Aptos documentation and creating full-stack Aptos blockchain applications.

Provides access to cryptocurrency market data, exchange information, and blockchain metrics through the CoinMarketCap API. Supports price quotes, historical data, trending tokens, global metrics, and DEX information across different subscription tiers.

An MCP server that provides tools for interacting with EDUCHAIN, allowing Claude to query information about tokens and pools and perform swaps through SailFish DEX.

Enables interaction with the Stacks blockchain through Claude Desktop. Manage wallets, trade tokens on DEXs, stack STX for Bitcoin rewards, and track portfolio—all through natural conversation.

Provides access to NFTGo's Developer API for retrieving NFT collection details, asset information, market data, wallet information, and search capabilities on the Ethereum blockchain.

This MCP server provides access to Composer Kit React component documentation, examples, and Celo Composer templates for building web3 applications on the Celo blockchain.