"protocols.io" matching MCP connectors:
Marketplace of pay-per-call APIs for AI agents. Top up once with USDC, then call any listed API - gasless, walletless, metered per request. Includes onboarded providers and hundreds of x402-native APIs discovered on-chain.
EPA AirNow MCP — official US real-time AQI + forecast (free key)
Agent-first skill marketplace with USK open standard for Claude, Cursor, Gemini, Codex CLI.
Real-time Amazon data API built for AI agents. 200M+ products, 1B+ reviews, live BSR, pricing, and competitor data as clean JSON. 10 agent skills for market research, competitor monitoring, pricing analysis, and listing audits.
Art Institute of Chicago MCP — wraps the ARTIC public API (free, no auth)
AI service marketplace — agents discover, call, and pay for API services automatically.
Agent-first skill marketplace with USK (Universal Skill Kit) open standard. Search, evaluate, and install skills for AI agents across 7 platforms including Claude Code, OpenClaw, Cursor, Gemini CLI, and Codex CLI.
AgentGuard — 20-tool AI safety MCP: policy preflight, risk scoring, audit logging, rate limits.
ATTOM MCP — Premium real estate data from ATTOM Data Solutions
AI Briefing MCP — Keep AI models current on industry developments
Alpha Vantage MCP — Stock market data, fundamentals, and earnings
- BlsA
BLS MCP — Bureau of Labor Statistics public data API (v2)
AudioAlpha turns 100+ daily finance and crypto podcasts into structured intelligence — α-sentiment scores, narrative signals, asset mentions, transcripts, and market snapshots with 40+ custom metrics. Built for AI-driven research and trading workflows.
ACLED MCP — Armed Conflict Location & Event Data Project
- amlA
AMLOracle — 12-tool AML/CFT MCP: 87k sanctions names, PEP screening, adverse media, SAR/STR.