Recently added agent tools.

Crystallography Open Database (COD) MCP.

CryptoCompare prices, OHLC history, social stats, news, exchanges.

Crypto Fear & Greed Index MCP.

Crypto Feeds MCP.

Crypto MCP — cryptocurrency prices and currency conversion

Crossref MCP — wraps the Crossref REST API (academic papers, free, no auth)

Crontab expression MCP.

Cricket MCP — wraps CricAPI (api.cricapi.com) for live cricket data.

Credit-card number validation MCP.

Checksum MCP — CRC-32 & Adler-32.

Crawlbase MCP — wraps the Crawlbase Crawling API (crawlbase.com, formerly

Crates.io MCP — wraps the crates.io REST API v1 (free, no auth)

CPSC MCP — US consumer-product safety recalls (CPSC, free, no auth).

CourtListener MCP — Free Law Project's CourtListener API (free, no auth required for basic access)

CountryStateCity MCP — wraps CountryStateCity API (api.countrystatecity.in/v1)

Countries MCP — world country data from REST Countries API v3.1

could-have-been-email MCP — wraps StupidAPIs (requires X-API-Key)

corporate-apology MCP — wraps StupidAPIs (requires X-API-Key)

Coresignal MCP — LinkedIn-adjacent company + employee data (coresignal.com)

Coordinate geometry MCP.

conspiracy-theory MCP — wraps StupidAPIs (requires X-API-Key)

Congressional Documents — full-text search and retrieval over the official

Congress MCP — US Congress data via GovTrack API (free, no auth required)

Confluence MCP — wraps the Confluence Cloud REST API v2 (OAuth)

ConceptNet MCP — open multilingual word/phrase relation graph

Comtrade MCP — UN Comtrade API for international bilateral trade data

EBI Complex Portal MCP.

Companies House MCP — UK statutory company registry (BYO key)

Wikimedia Commons file/image/audio/video search via MediaWiki Action API

Committee Releases — documents congressional committees publish on their OWN

Comic Vine: characters, issues, volumes, creators, publishers. Free key.

Color API MCP — wraps thecolorapi.com (free, no auth)

Color Pizza MCP — names hex colors using human-friendly color-name lists.

Color utilities MCP.

Colombia SECOP MCP — Colombian government procurement (public contracting).

College Scorecard MCP — US Department of Education College Scorecard API

Coinpaprika MCP — alternative crypto data source

CoinMarketCap MCP — crypto prices, market cap, rankings

CoinGecko MCP — wraps CoinGecko free API (no auth required)

Coinbase Exchange public MCP.

Codewars user profiles, completed kata, authored kata, kata detail. Keyless.

Code::Stats public coding-XP profiles (codestats.net)

Codeforces competitive programming users, contests, problems

Cocktails MCP — TheCocktailDB API (free, no auth)

CNPJ Brazil MCP — Brazilian company-registry (Receita Federal) lookup via

Czech National Bank (Česká národní banka, ČNB) public API MCP. Keyless.

CMS Open Payments, with annual dataset discovery through the official DKAN API.

CMS Open Data MCP — US Centers for Medicare & Medicaid Services.

Cloudflare Radar MCP — internet observatory (traffic, attacks, BGP, quality)

Close CRM MCP Pack — wraps the Close (close.com) API v1.