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.

Record how any CLI behaves and check that a rewrite behaves the same (golden tests).

QRKit io.github.OlsOls4/qrkit

Generate QR codes (URL, WiFi, vCard) and barcodes as PNG/SVG

Persistent memory for AI coding agents. Install the memry CLI and run memry setup.

Greta sh.greta/greta

AI app builder: build, deploy and grow websites and full-stack apps on Greta from your AI agent.

Turn an OpenAPI spec into WireMock stubs, contract tests and chaos scenarios, on local LLMs.

BuildFeed tech.buildfeed/buildfeed

Startup, product, and design takes from curated tech YouTube, with timestamped transcript passages.

uniwire io.github.uniwire-dev/uniwire

Electrical single-line and multi-line diagrams: build, check (NF C 15-100, IEC 60364), draw, PDF.

cpcp io.github.builderbasetech-lgtm/cpcp

Send files and text with a six-digit transfer code. Remote MCP for agents.

ALK Trading io.github.rpatel021/alktrading

Read-only ALK Trading signals, published track record, stored backtests and strategy rules.

MCP server for the OpenTofu/Terraform native test framework: scaffold, mock, validate, run tests

Versyka com.versyka/versyka

Find retiring AI models and outdated API SDKs in your code, with dates, replacements and guides.

Novi Corpus com.novicorpus/legal-body

A legal body for AI agents: a real company, a verified human and spending rules on Arc (testnet).

Human Test Desk site.chatgpt.newvideocreator.human-test-desk/human-test-desk

Free human usability tests for agent-built websites. Submit tasks; get written findings as JSON.

Generate Compose Multiplatform apps, Unity games and Ktor backends locally from tested templates.

Offline geocoding and reverse geocoding from one local file per country. No API key, no rate limit.

Attest by DataHubz (verify only) com.datahubz/attest-verify

Verify Attest agreements, stamp codes, receipts, proofs and SHA-256 fingerprints, with no sign-in.

Vibe CAD for 3D printing: design, check and export printable parts with build123d.

Use This Skill com.usethisskill/skills

Search 1,700+ agent skills for Claude, Codex and Cursor, each safety-scanned, with proofs.

GermanExam.pro pro.germanexam/germanexam

TestDaF, DSH, Goethe C1, telc C1: graded writing, reading + listening practice; speaking on website

Shared local memory for AI coding tools that stays true to your code.

Income Checker io.github.Tariqlearnstocode/incomechecker

Income and rent calculators, pay stub math checks, and bank-based income analysis tools.

Mac app that runs Claude or Codex on a schedule against your mail, calendar, and files.

Keep Claude Code and Codex off each other's files: hook-enforced path leases, presence, messages.