"Free and open-source coding assistants" matching MCP servers:

Model Context Protocol (MCP) server providing real-time institutional Spot Bitcoin (BTC) and Ethereum (ETH) daily net flow metrics for AI agents.

An MCP server that enables fee-free USDC transfers on the Base blockchain network using Coinbase CDP MPC Wallet integration, with support for ENS and BaseName domain resolution.

Enables AI agents to inspect and measure live crypto charts, read indicator and market-structure data, add native indicators, and create editable annotations through a local MCP bridge.

This MCP wraps Bitrefill public API to allow agents to search for products and shop using cryptocurrencies like Bitcoin, Ethereum, Solana, and many more.

📈 提供股票、加密货币的数据查询和分析功能MCP服务器

Hourly news sentiment and typed market events (hack, regulation, listing, delisting, legal) for 30 crypto pairs, with source links on every signal. Four tools cover the latest score per symbol, history, classified events and the symbol list, and a free API key works out of the box

Open-source MCP server exposing the Agent402.Tools catalog: 500+ pay-per-call tools for AI agents, including browser rendering, web search, PDFs, OCR, LLM inference, code execution, live financial/crypto/macro data, SEC EDGAR, and wallet-keyed memory. Free via proof-of-work, or pay per call in USDC across ten chains via the x402 protocol. No API keys, no signups

Enables AI coding assistants and trading bots to verify smart contracts, test honeypot traps, assess DEX liquidity, and check wallet counterparty risk before deploying or trading capital on Base. It exposes preflight clearance, token audits, KYA reputation, and web-scraping tools with free and paid x402 tiers.

MCP server exposing 47 Polymarket API tools for AI assistants. Covers the full Gamma, CLOB, and Data APIs plus a fluent MarketBuilder for multi-source queries.

An MCP server that records consented, attributed, paid-for receipts for open-source dependencies, settling per-call USDC payments on Algorand with on-chain attribution.

Enables AI agents to discover, validate, and fetch verified crypto and US-equity market data, including quality-flagged OHLCV bars, leakage-safe features, funding, open interest, order flow, context, events, and regime labels. It supports free catalog discovery and x402 USDC payments per call.

Enables AI assistants to access Solana/Pump.fun tools, unsigned transaction tickets, Open Wallet Standard public wallet operations, and OpenRouter/RedPill model routing.

Enables users to access five astrology tools via JSON-RPC, including natal chart, sun sign, market pulse, weather, and combined celestial conditions, integrating Free Astrology API, CoinGecko, and Open-Meteo.

DeFi analytics from DefiLlama, free and no authentication required.

Open-source routing layer that splits compute jobs and inference prompts across resources using Gemini, with MongoDB-backed route books and priced allocations.

Enables deep cryptocurrency token research by pulling live market data, exchange listings, protocol TVL and fees from CoinGecko, CoinMarketCap and DeFiLlama alongside web searches. It assembles the results into structured, source-tracked reports covering technical fundamentals, market metrics and social sentiment, free of API keys and fully locally.

CheapestInference — unlimited flat-rate API for frontier open-source LLMs

An open-source financial data server that exposes MCP tools and HTTP endpoints for A-share, US equity, ETF, index, and crypto market data, technical indicators, fundamentals, money flow, news, and filings. It enables AI agents and backends to query multi-source market data, run analysis, and export CSV/JSON for code-execution workflows.

Checks live x402 routes across Base, Solana, and Algorand before agents spend. $0.003 USDC settles only for a valid live eligible route; normal typed misses are not settled. Free preview and validate tools. Seller payment is separate; the agent keeps its wallet. Optional signed route-binding receipts support buyer-side checks.

Rug pull risk scores and on-chain forensics for memecoins on Solana, Ethereum, Base and Robinhood Chain - launch-bundle detection, funding-origin tracing, deployer history, insider networks and whale flow. 15 read-only tools.