Best Calls AI Skills & MCP Servers

Zephex MCP — codebase intelligence tools for AI coding agents. stdio server that runs locally, reads your project files, and proxies AI calls to the Zephex backend.

Monetize any HTTP API or MCP server in one line — no monthly fee, 3,000 calls free, then 3% only when your API earns. Non-custodial USDC billing on Base (~2s settlement, ~60x cheaper than card rails), x402-compatible. Also ships 8 free real-API demo tools

Model Context Protocol server for the PropLine player props betting odds API. Exposes live odds, prop resolution, cross-book +EV, scores, and box-score stats as tool calls for Claude Desktop, Claude Code, and any MCP-compatible client.

MCP server for Agon Gateway discovery, calls, Tokens market data, and generic signer-hook auth.

HITL infrastructure for AI agents. Your agent calls awaitHuman(), a human reviews via Slack/email/dashboard, agent resumes with a typed response.

Official MCP server for OmniDimension. Drive voice agents, dispatch calls, and manage knowledge bases from Claude, Cursor, Windsurf, and any MCP client.

Multiplexer for MCP tool calls — parallel execution, batching, caching, and pipelining for any MCP server

A tiny TypeScript approval gate for AI tool calls, MCP tools, and human-in-the-loop workflows.

BLACK_WALL MCP server — a pre-action risk check your AI agent calls before any irreversible action (send email, move money, run SQL, delete data).

Triage walk-ins, calls, OpenTable, Google Reserve into one queue.

Supply chain intelligence APIs for AI agents. Real-time freight rates (85+ carriers), crypto/forex/commodity prices, port congestion (NOAA), shipping lanes, economic indicators (FRED), and Cerebrix AI inference. 100 free calls/day, no signup. x402 USDC micropayments, ERC-8004 t

QueueSim is a free Model Context Protocol server that gives Claude — and any MCP-speaking AI — the ability to run real discrete event queueing simulations inside a conversation. Ask "I run a 3-agent call center, 30 calls/hr, 4-min handle time — what's my wait?" and get an actual

Search live food safety data from FDA, FSIS, CDC, and city health departments (NYC, Chicago, SF, Seattle, Boston). 5 tools: search recalls, outbreaks, alerts, restaurant inspection articles, and food safety guides. Data aggregated from 25+ public government sources via Panko Aler

36+ crypto security & intelligence tools via x402 micropayments. Free trials on every tool (1-5 free calls per tool, resets weekly). Deep contract audits ($0.05, 1 free), honeypot detection ($0.02, 3 free), whale decoding ($0.15, 1 free), rug pull prediction ($0.10, 1 free), copy