"Web3.js" matching MCP servers:

Deterministic Web3 x402 Critical Minerals & Urban Mining Scrap Valuation Oracle for Autonomous AI Agents on Base (USDC)

AI-powered crypto signal intelligence for 20 assets (BTC, ETH, SOL, etc). 6 scoring dimensions: whale activity, technical analysis, derivatives flow, narrative strength, sentiment, market structure. Market regime detection (TRENDING/RANGING), portfolio optimization, and accuracy tracking. 9 read-only MCP tools. Free via MCP, $0.001 USDC via x402 on Base for REST API.

Look up Polish companies from any AI assistant: registry data (KRS, REGON, CEIDG), VAT white list checks before payments, and financial statements of 4.4M businesses. Read-only tools backed by official public registers.

An MCP server that validates Japanese corporate numbers and invoice registration numbers, and normalizes/matches company names across notation variants.

Provides AI assistants with clean access to 58 US macroeconomic indicators from the FRED database, with pre-computed changes and no need to know series IDs.

Enables AI agents to investigate corporate ownership, trace ultimate beneficial owners, screen sanctions, detect offshore exposure, and access fully cited dossiers from 130M+ entities across 31 global registries.

Enables AI agents to query and analyze US-Mexico remittance data from Banco de México, with tools for national totals, Mexican states, municipalities, US states, and coverage information.

Enables searching J-Quants API endpoints, retrieving detailed documentation, generating executable sample code, and answering FAQs via MCP clients like Claude Desktop.

Enables queries about US commercial and federal-programme real estate debt, loan maturities, subsidy expiries, and Massachusetts property parcel ownership, assessed values, and recorded sales through MCP tools, with eight free unauthenticated tools and one paid debt-maturity schedule tool.

Enables AI agents to issue, correct, and register legally compliant Spanish electronic invoices with AEAT VeriFactu, supporting F1/F2 types, R1–R5 correctives, and NIF validation from Claude, ChatGPT, Cursor, or VS Code.

Provides accurate Japanese business day utilities including holiday checks, settlement day calculations, and fiscal period determination, all with embedded holiday data from 2020-2030.

MCP server for querying US federal contracts and public company financial data from USAspending and SEC EDGAR. Enables searching expiring contracts, screening companies by metrics, and retrieving financial histories.

AI-powered freelance business manager for Claude Code. Proposals, invoices, time tracking, scope management, and follow-ups - 37 tools, 5 coaching skills.

MCP server for Japanese business days, public holidays, wareki dates, and tax arithmetic, helping AI agents avoid common Japanese date and tax errors.

Model Context Protocol (MCP) server for Spanish Electronic Invoicing. Provides tools to generate, validate, and submit invoices across VERI\*FACTU, Facturae/FACe, SII, TicketBAI, and Crea y Crece B2B.

Enables AI agents to evaluate stablecoin treasury allocations by protecting upcoming obligations, calculating true surplus, stress-testing proposed investments, and returning explainable ALLOCATE, HOLD, or BLOCK decisions.

Provides read-only access to Polymarket US public market data, including prices, order books, and spread/fee analytics, via MCP tools.

Enables LLMs to interact with a self-hosted Actual Budget instance, providing financial data and management tools with correct financial semantics and no cents math.

A Model Context Protocol (MCP) server that provides comprehensive cryptocurrency analysis using the CoinCap API. This server offers real-time price data, market analysis, and historical trends through an easy-to-use interface. Updated to use Coin Cap API v3

Enables AI agents to interact with Robinhood Chain via USDG payments, offering tools for balance, pricing, trading, and more.