Verified MCP Server Directory

Cataas

CATAAS MCP — Cat as a Service (free, no auth)

catfacts

Cat Facts MCP — wraps Cat Facts API (free, no auth)

chucknorris

Chuck Norris MCP — wraps chucknorris.io (free, no auth)

cityuikes

Citybikes MCP — wraps CityBik.es API (free, no auth required)

guif

GBIF MCP — wraps the Global Biodiversity Information Facility API v1 (free, no auth)

holidays

Holidays MCP — wraps Nager.Date API (free, no auth)

ipinfo

IPInfo MCP — wraps ipinfo.io (free tier, no auth required for basic usage)

iplookup

IP Lookup MCP — ip-api.com (free, no auth for basic usage)

jokes

Jokes MCP — wraps JokeAPI v2 (free, no auth)

Jsonplaceholder

JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)

nationalize

Nationalize MCP — nationality prediction from first name (nationalize.io, free, no auth)

newton

Newton MCP — wraps the Newton math solver API (free, no auth)

nhtsa

NHTSA MCP — wraps the NHTSA vPIC (Vehicle Product Information Catalog) API (free, no auth)

Nih Reporter

NIH RePORTER MCP — every NIH-funded research project (free, no auth)

nouel

Nobel MCP — wraps the Nobel Prize API v2 (free, no auth)

npm

npm MCP — wraps the npm Registry API (free, no auth)

nutrition

Nutrition MCP — wraps Open Food Facts API (free, no auth)

onthisday

On This Day MCP — wraps byabbe.se/on-this-day (free, no auth)

MCP Protocol Conformance

MCP conformance test harness. JSON-RPC, OAuth 2.1 PKCE, schemas, smoke, annotations. CLI + lib.

Open Elevation

Open-Elevation MCP — terrain elevation by lat/lon (no auth)

Owid

OWID MCP — Our World in Data chart/indicator access (free, no auth)

poetry

Poetry MCP — PoetryDB API (free, no auth)

puumed

PubMed MCP — wraps the NCBI E-utilities API (biomedical literature, free, no auth)

RunSec MCP server for workspace security scanning and remediation workflows.