MCP Server Directory

402MCP.org — HTTP 402 & Agent Payment Registry org.402mcp/registry

Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.

AI Mail MCP com.aimailmcp/mail

Real email for AI agents: domains, mailboxes, a unified inbox, wait-for-code, send and reply.

varioroam eSIM configurator com.varioroam/esim-catalog

Build-your-own travel eSIM: live quotes by country, GB, days and networks, plus a buy link.

US Tariff Lookup com.profitpather.tools/us-tariff-lookup

Find the right US tariff code for a product and the duty rate that actually governs it.

Xzar si.xzar/xzar

Crash-test your AI agent on real professional decisions, graded against what actually happened.

Research Methods Library io.github.mikenguyen13/research-methods-mcp

Research methods for AI assistants: study design guidance, R and Python code, and citations

RouteMyAgent Model Helper dev.routemyagent/model-helper

Discover available AI models and delegate analysis or code review from your existing agent.

Unofficial read-only deweloperuch.pl data: new-build asking prices, RCN transactions, GUS and NBP

Run, write and test the API requests saved in a Kurlo workspace, the open source API client.

The Wiley Rule (public data) org.thewileyrule/public

Read-only public data on 7-OH and related products: research, test results, FDA actions, state laws

Figma to pixel-perfect code: deterministic HTML/React, then a render + pixel-diff verify loop.

Scans LLM/agent code for Unbounded Consumption / denial-of-wallet risks (OWASP LLM Top 10 2026 #6)

Delve to Life com.delvetolife.mcp/delve-to-life

Dress codes explained, outfit formulas by occasion and weather, and clothing colour combinations.

Sleek design.sleek/sleek

Design your mobile app UI with AI, then have your coding agent build the real app from it.

Which parts of what you want to build open source already covers. Every repo checked live.

Lookahead-free backtests: point-in-time SEC factors, your prices, real costs, every variant counted.

Reevol Source: supplier search com.reevol.source/supplier-search

Search and compare 200,000+ global suppliers by brief, name, HS code or country. Free, no key.

Code graph for coding agents: symbol search, callers, blast radius and cross-service impact.

onetapvote com.onetapvote/polls

Create one-tap polls, share them by link or QR code, and read the results from your AI assistant.

miow me.miow/miow

Build and host a small business website: write its pages, move an existing site in, add a domain.

V01D by A-to-Mind io.github.atomeam/void

Ask Void anything: answers with sources, plus code review, moon phases and meteor showers.

GTM Bud com.gtmbud/gtm-bud

Build, launch and monitor GTM Bud LinkedIn outbound campaigns and answer lead replies.

LSP call graph for coding agents: a symbol's callers, callees, tests and live files in one call.

Orvio design.orvio/orvio

Search, read and pull the source of complete coded design products from the Orvio catalog.