AI integrations
Plugins, connectors, MCP servers, channels, and tools that extend AI agents.
Cisa Kev
CISA Known Exploited Vulnerabilities catalog
Citybikes
Citybikes MCP — wraps CityBik.es API (free, no auth required)
Civitai
Civitai MCP.
Clash Royale
Clash Royale player, clan, war, tournament, rankings, cards. Supercell dev key.
Clevelandart
Cleveland Museum of Art Open Access API (~63k artworks, many CC0)
Clickup
ClickUp MCP — wraps the ClickUp REST API v2 (BYO API key)
climate
Climate MCP — wraps Open-Meteo Climate API (free, no auth)
Climate Feeds
Climate & Energy Feeds MCP.
Climatiq
Climatiq MCP — carbon footprint calculator with emission factors
Clinicaltables
NIH Clinical Tables: ICD-10/9, RxTerms, LOINC, NPI, conditions search. Keyless.
Clinicaltrials
ClinicalTrials MCP — wraps ClinicalTrials.gov API v2 (free, no auth)
Close Crm
Close CRM MCP Pack — wraps the Close (close.com) API v1.
Cloudflare Radar
Cloudflare Radar MCP — internet observatory (traffic, attacks, BGP, quality)
Cms
CMS Open Data MCP — US Centers for Medicare & Medicaid Services.
Cms Open Payments
CMS Open Payments, with annual dataset discovery through the official DKAN API.
Cnb Cz
Czech National Bank (Česká národní banka, ČNB) public API MCP. Keyless.
Cnpj Br
CNPJ Brazil MCP — Brazilian company-registry (Receita Federal) lookup via
cocktails
Cocktails MCP — TheCocktailDB API (free, no auth)
Codeforces
Codeforces competitive programming users, contests, problems
Codestats
Code::Stats public coding-XP profiles (codestats.net)
Codewars
Codewars user profiles, completed kata, authored kata, kata detail. Keyless.
Coinbase Exchange
Coinbase Exchange public MCP.
Coingecko
CoinGecko MCP — wraps CoinGecko free API (no auth required)
Coinmarketcap
CoinMarketCap MCP — crypto prices, market cap, rankings