MCP Server Directory

Basinwise io.github.maxbeech/basinwise

Determines which NPDES stormwater permit governs a US site and its requirements, cited to source.

mdapi — HTML to Markdown for AI agents in.fastdb.md/mdapi

Web page or HTML to clean LLM-ready Markdown or JSON. x402 pay-per-call, $0.005, no API key.

calc.engineer engineer.calc/calc

88 free engineering calculators: RF link budgets, LoRa/Meshtastic, PCB, solar, homelab. Keyless.

Cellarion app.cellarion/cellarion

Wine cellar manager: bottles, racks, drink windows, pairings and a shared wine registry.

VHGENGINE app.railway.up.engine-production-3bdc/vhgengine

Agents-first viral-hook engine: generate, score, and remix short-form hooks over MCP.

NVIDIA NemoClaw CKG io.github.Yarmoluk/ckg-nvidia-nemoclaw

NVIDIA NemoClaw knowledge graph — 55 nodes, F1 0.576 (+269% vs RAG), 11x fewer tokens. MCP-native.

NVIDIA Nemotron + Perplexity Sonar as knowledge graphs — 2 domains, 83 nodes. MCP-native.

Turn a CSV or a named public dataset into an animated chart video, figures re-checked first.

Real, live npm/PyPI docs and OSV.dev vulnerability data for AI coding agents. No fake data.

Drawdown-first risk for your stock/ETF book — every number from a validated core, not the model.

Persistent memory for AI agents — 36 cited neuroscience mechanisms, local-first, hybrid retrieval.

Read-only OpenIM search for institutional buy-side investment models and architecture.

Free, local MCP server that audits ClickUp, Slack & Teams for work that slipped through.

Salesforce AgentForce CKG io.github.Yarmoluk/ckg-agentforce

Salesforce AgentForce knowledge graph — 40 nodes, Einstein Trust Layer, 11x fewer tokens than RAG.

opentax io.github.Invaro/opentax

Verifiable US tax oracle for AI agents: cited, machine-checkable federal and state tax computation

YouTube Video Summarizer (pay-per-call) io.github.JonTelep/summarize-vid

Summarize YouTube videos or fetch transcripts. Pay-per-call via x402 (USDC on Base), no account.

Agent failure memory network. Search 235+ verified debugging lessons from real engineering sessions.

swatgenx io.github.SWATGenX/swatgenx

Automated, calibrated SWAT+ watershed modeling and national hydrologic datasets for the U.S.

Honest claim corroboration for AI agents: syndication-aware independent-source counting.

Lint, curate & prepare computer-vision datasets from your AI assistant — MCP server, 67 tools

Turn an unfamiliar codebase into validated architecture, contracts, and a reimplementation spec.

Codebase memory for AI agents: an AST index plus agent-written notes that self-stale.

Self-healing web access for AI agents — recovers through bot blocks, captchas and JS pages.

Resolve documentation ownership, edit roots, checks, and human handoffs before an agent edits code.