MCP Server Directory

radio io.github.pipeworx-io/radio

Radio MCP — wraps Radio Browser API (free, no auth)

MCP server for ECDSA cryptography

Reactome io.github.pipeworx-io/reactome

Reactome biological pathway database

Rawg io.github.pipeworx-io/rawg

RAWG MCP — wraps the RAWG video games database API (rawg.io)

MCP tool that provides current Unix timestamp

MCP server exposing Exa websearch API

Quotable io.github.pipeworx-io/quotable

Quotable MCP — wraps Quotable API (free, no auth)

An MCP server that exposes hashlib functionality

An MCP server for weather information.

MCP server exposing KiCad PCB Editor functionality via IPC API

SwapWizard io.github.DeFiRe-business/swapwizard-mcp

Non-custodial DeFi for AI agents: swaps, concentrated liquidity (V3/V4) zaps + ranges, 5 EVM chains

MCP server for mDNS (Multicast DNS) service discovery

Pypi io.github.pipeworx-io/pypi

PyPI MCP — wraps the Python Package Index (PyPI) JSON API (free, no auth).

MCP server exposing MySQL database functionalities as tools

MCP server exposing number theory functions and factorization algorithms

An MCP server that exposes NumPy functionality

mcp-server io.github.Print-one/mcp-server

An MCP server to send personalised direct mail.

MCP server exposing cypari2 (PARI/GP) number theory library

Quickbooks io.github.pipeworx-io/quickbooks

QuickBooks MCP Pack — query customers, invoices, and accounts via QuickBooks Online API.

Pvgis io.github.pipeworx-io/pvgis

PVGIS MCP — EU Joint Research Centre PV system modeler

Pubchem io.github.pipeworx-io/pubchem

PubChem MCP — NIH chemistry compound database (no auth)

Gas Estimator API io.github.Br0ski777/gas-estimator

Multi-chain gas estimation — ETH, Base, Polygon, Arbitrum, BSC. x402 micropayment.

MCP server exposing pwntools 4.15.0 functionality for binary exploitation

MCP server exposing Signet cryptographic signing, verification, and content hash tools over stdio.