MCP Servers
Model Context Protocol servers that give AI agents access to tools and data — sourced from the official MCP registry and ranked by GitHub stars.
Citybikes
Citybikes MCP — wraps CityBik.es API (free, no auth required)
Clearlydefined
ClearlyDefined — the licence, copyright attribution and provenance actually found inside an…
Clickup
ClickUp MCP — wraps the ClickUp REST API v2 (BYO API key)
Climate
Climate MCP — wraps Open-Meteo Climate API (free, no auth)
Climatiq
Climatiq MCP — carbon footprint calculator with emission factors
Clinicaltrials
Search and analyze ClinicalTrials.gov: trials by keyword/condition/drug/status/phase, one study's…
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.
Cnmv Filings
Spain CNMV Regulated Filings MCP — keyless, same-day-fresh.
Cnpj Br
CNPJ Brazil MCP — Brazilian company-registry (Receita Federal) lookup via
Cobalt
Cobalt Intelligence MCP — US Secretary-of-State business registration, UCC
Codex Contaminants
Codex Alimentarius CXS 193 — maximum levels for contaminants and toxins in
Codex Gsfa
Codex GSFA — the FAO/WHO General Standard for Food Additives (CXS 192-1995).
Codex Mrl
Codex Alimentarius maximum residue limits — the internationally agreed legal
Coingecko
CoinGecko MCP — wraps CoinGecko free API (no auth required)