"Free Graph and Network Visualization Tools (No API Key Required)" matching MCP servers:

MCP server that exposes the OBBBA No Tax on Tips federal deduction logic as callable tools, enabling users to check eligibility and estimate tip deductions.

Provides access to 529,000+ US statute sections across all 50 states and federal codes for comprehensive legal research. Supports semantic search, citation graph traversal, jurisdictional comparisons, and regulatory risk analysis through natural language queries.

Enables trademark clearance and research across EU and Benelux registers, plus company, group-structure, and EU VAT lookups, all through free public sources without API keys.

Enables automated company formation across multiple jurisdictions with REST and MCP interfaces. Supports jurisdiction listing, requirement details, cost estimation, and secure API key management.

MCP server providing EU compliance APIs for VAT validation, sanctions screening, counterparty checks, and invoice extraction. Enables AI agents to make pay-per-call requests settled in USDC on Base via x402, with no account or API key required.

MCP server for Azerbaijan's official legal-acts database (e-qanun.az), enabling search, metadata retrieval, and full-text access to legislative and judicial documents.

Deterministic US equity-compensation tax optimizer. Six tools cover ISO/AMT exercise scheduling, NSO sell-vs-hold, RSU vest-and-sell, single-stock concentration, protective put / zero-cost collar pricing, and Section 1202 QSBS qualification. Federal plus 50-state plus DC tax math.

Generate Polish legal documents (sales contracts, powers of attorney, termination letters, loan agreements, handover protocols) directly from your AI assistant. No API key required.

Verifiable Korea-specific judgment for AI agents — Go/Conditional/Hold verdicts cross-checked by a human expert council, per-report audit endpoint (committee DIDs + signatures). x402/USDC per call ($1–$5), free preview.

This MCP Server provides a natural language interface to interact with Google's Policy Analyzer API, allowing users to analyze policies and evaluate compliance through conversations.

Provides FHIR resource validation, synthetic test fixture generation, and HIPAA-safe logging review as MCP tools for AI agents.

Enables integration with the ZapSign API for electronic document signing and management, including document, template, signer, webhook, and background check operations through MCP tools.

Real-time OFAC and global sanctions screening for AI agents: screen crypto addresses, emails, websites, government IDs, and countries against OFAC SDN and 10+ sanctions/crime/risk lists, plus PEP screening, VPN detection, and IP geolocation. Hosted remote streamable-HTTP server at https://api.compliapi.com/mcp (anonymous tools/list; free API key or x402 pay-per-call).

Provides tools for querying Korean laws, precedents, administrative rules, and ordinances via GitHub REST API, enabling natural language access to legal data.

Automates carbon credit project registration document review, transforming 6-8 hour manual reviews into 60-90 minute guided workflows with automated document discovery, evidence extraction, cross-validation, and compliance report generation.

A public, no-auth remote MCP server that exposes Arc & Ledger's free tax calculators and intake funnel as tools inside AI assistants. Provides tools for IRS notice explanation, FBAR/FATCA, LLC vs S-Corp comparison, quarterly tax estimates, and more.

MCP server for the RegIntel API — structured regulatory data across 41 jurisdictions and 212 regulations

Enables real-time retrieval of authoritative Chinese government policies and verification of law article citations (《法名》第X条) via public sources, with no API key required.

Enables U.S. exclusion, debarment, and license screening for agents, returning results with Ed25519-signed receipts of which list snapshots were checked.

Enables querying EU legal documents, case law, and citation graphs through natural language using the LexAPI.