MCP Server Directory

MCP for building, inspecting, and live-debugging Firefox CSS themes.

databutler-stats io.github.physics-star-cat/databutler-stats

Exact statistics & probability: distributions, hypothesis tests, CIs, Bayesian updates, regression.

Local-first MCP server for data-quality discovery, evidence, drift, and controlled repair.

Your config files are never compiled — nothing fails until deploy. 36 snippets and 28 lint rules for

MCP Endpoint Lint - handshake, tool schemas, JSON-RPC errors dev.workers.pathwren.www/mcp-endpoint-lint

{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"whoami","arguments":{}}} free no key

Bisque Presentations cloud.bisque/presentations

Create narrated presentations from HTML, poll build status, list them, read one back as text.

Loadster com.loadster/loadster-mcp

Load testing and synthetic monitoring platform: test with Playwright, Browser Bot, or Protocol Bots.

ABC complexity gate for AI-written code with an MCP inspection tool.

PermitReporter — US Building Permit Intelligence com.permitreporter/us-building-permits

Source-linked building-permit search across 34 US states and DC, with county-level coverage.

Unicode word count, text discarded io.github.sadri-dridi/word-n

Unicode word count, text discarded

US state NV io.github.sadri-dridi/st-nv

USPS state code NV.

Prediction Market News — buy per-query in-session (pmnews) com.a2awire/data-prediction-market-news

Prediction-market news, $0.01/query. Register and buy inside this MCP session — free testnet funds.

ProfitCollector ca.bakhour/profitcollector

22 pay-per-call developer, security, network and data utilities using x402 on Base.

ISO country CI io.github.sadri-dridi/cc-ci

Public ISO 3166-1 record for CI.

Generate and edit images with every image model on the platform. Returns the image to the agent.

RiverWatch: USGS river levels & stream-flow gauges — per query com.a2awire/data-river-level-stream-flow-flood-alert-gauge

River levels & flood alerts: USGS gauges. $0.01/query. Register in-session — free testnet funds.

Prognyx oncology intelligence com.prognyx/oncology-intelligence

Live ClinicalTrials.gov oncology trial comparison around an asset, plus landscapes and CI briefings.

Read and post to The Agent Billboard on Solana, with spend limits in code and a reasoning log.

Review and safely clean local Codex and Claude Code sessions

Free Sparkplug B topic linting, UNS naming checks and AI-readiness screening. No API key.

StyleKit io.github.AnxForever/stylekit-mcp

MCP server for StyleKit styles, tokens, recipes, lint and repair over stdio or HTTP.

Dependency Vulnerability Tracker — package security advisories ($0.01/query) com.a2awire/data-dependency-vulnerability-malicious-package-security

Dependency vulns & malicious-package advisories. Register in-session — free testnet funds.

NASA Image of the Day — space & astronomy photos (nasaiotd) com.a2awire/data-nasa-photo-space-image-astronomy

NASA astronomy photo of the day + imagery. $0.01/query. Register in-session — free testnet funds.

Trust Check io.github.gmahar82-stack/trust-check

Base crypto safety for agents: honeypot/tax test, address poisoning, rug feed, creator record.