"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP connectors:

Read-only MCP server for the OrchestKit docs: full-text search + Markdown fetch. No auth.

Neutral, verification-gated MCP directory of Japan construction contractors (KIRA-audited).

Savvly MCP: query fund data, model projections, and compare against alternative retirement products.

Read-only breach intel, full history 2007-today: reports THAT an org was breached, never the data.

Search and cite US law from official sources, then form an LLC or nonprofit with free agent tools.

DXF and PDF/X-4 for AI agents: structured facts, PNG renders, an interactive in-chat viewer.

Author and validate Calaf workspace seeds against the app's real importer. No account needed.

The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across perp venues via MCP.

Polish law: search statutes (ISAP), court rulings, verify citations. Free tier + paid plans + x402.

Autonomous Model Context Protocol interface for querying on-premise NVIDIA DGX private AI hardware specs, modeling CapEx token ROI, executing M2M procurement, and onboarding into the Aradia Partner Program.

Neutral freight reference + validation layer for AI agents: ADR, HS, UN/LOCODE, freight math

Free, open MCP server for The Urantia Papers. 197 papers, 14,500+ paragraphs, 4,400+ entities.

Identity infrastructure for the AI economy. Confirms if someone is known; returns inferred traits.

Riddle.com is a no-code platform for quizzes, surveys, personality tests, prediction games, interactive graphics, and leaderboards. Use the MCP to create, edit and analyze content.

Daily editorials, exit costs, depth concentration, tiers, and sealed records. No commodity futures.

Russian company lookup (EGRUL/INN), Cyrillic search, RU page to Markdown. Pay per call in USDC.

Convert PDF bank statements into structured transactions, accounts, and balances.

Bank and lender monitoring with historical-evidence limits and eligibility flags beside every claim.

MarkupBase turns AI-generated Markdown and HTML into durable, versioned artifacts that people can review and discuss. Its MCP server lets agents publish new versions, preserve contextual comments, include hosted images, and respond to feedback through secure account-linked identities, creating a clear human review boundary without requiring real-time editing.

Cães e gatos para adoção no Brasil, de ONGs e protetores. Busque por cidade, porte, idade e saúde.