TidyData MCP Server

49 read-only tools for AI assistants: public holidays and business days for 100+ countries, currency conversion (ECB rates), time zones, sunrise & moon, DNS / WHOIS / domain availability, web page inspection (status, redirects, SEO, links, tables, tech stack), geodata (cities, airports, postal codes, distances), nutrition facts, dictionary, spell check, summaries and calculators.

Remote server, nothing to install. Works with Claude, ChatGPT, Cursor, VS Code, Windsurf and any MCP client.

https://tidydata-api.tidydata.workers.dev/mcp

Transport: Streamable HTTP (stateless JSON)
Authentication: none
Free: 100 tool calls per day per user. Need more? Use the same APIs with a plan on RapidAPI, Zyla or api.market → pricing

Connect

Claude (claude.ai / Claude Desktop): Settings → Connectors → Add custom connector → paste the URL above.

Claude Code:

bash

claude mcp add --transport http tidydata https://tidydata-api.tidydata.workers.dev/mcp

ChatGPT: Settings → Apps & Connectors → Create (developer mode) → paste the URL above, authentication None.

Cursor (~/.cursor/mcp.json) · Windsurf · Cline:

json

{
  "mcpServers": {
    "tidydata": { "url": "https://tidydata-api.tidydata.workers.dev/mcp" }
  }
}

VS Code (.vscode/mcp.json):

json

{
  "servers": {
    "tidydata": { "type": "http", "url": "https://tidydata-api.tidydata.workers.dev/mcp" }
  }
}

Clients that only speak stdio:

bash

npx -y mcp-remote https://tidydata-api.tidydata.workers.dev/mcp

Example prompts

"Is 8 December 2026 a public holiday in Spain, and how many business days are there in December?"
"Convert 250 USD to EUR at today's ECB rate."
"Check the DNS, SSL redirects and security headers of example.com."
"Is tidyplanner.com available? If not, who owns it?"
"Sunrise and golden hour in Lisbon tomorrow."
"Calories and protein of 200 g chicken breast, 100 g rice and 1 tbsp olive oil."

Tools

📅 Dates & time

Tool	What it does
`public_holidays`	Public holidays of a country
`is_public_holiday`	Is this date a public holiday?
`business_days_between`	Business days between two dates
`add_business_days`	Add business days to a date
`convert_time_zone`	Time zone converter / world clock
`timezone_by_coordinates`	Time zone of a latitude/longitude
`sunrise_sunset`	Sunrise, sunset, twilight and golden hour
`moon_phase`	Moon phase and illumination
`convert_calendar_date`	Convert a date to Islamic, Hebrew, Chinese… calendars

💱 Money

Tool	What it does
`convert_currency`	Convert currency (ECB rates)
`exchange_rates`	Latest exchange rates
`validate_iban`	Validate and parse an IBAN
`loan_calculator`	Loan / mortgage payments and schedule

🌐 Web & domains

Tool	What it does
`dns_lookup`	DNS records of a domain
`dns_propagation`	DNS propagation across global resolvers
`domain_whois`	Domain registration info (WHOIS/RDAP)
`domain_availability`	Is a domain name available?
`check_url_status`	HTTP status and redirect chain of a URL
`expand_short_url`	Expand a shortened link
`link_preview`	Title, description and image of a web page
`website_technologies`	Technologies used by a website
`seo_audit`	On-page SEO audit of a URL
`security_headers_check`	Security headers grade of a website
`extract_links`	Links found on a web page
`extract_html_tables`	Tables of a web page as JSON
`sitemap_urls`	URLs listed in a website's sitemap
`robots_txt_check`	Is a URL allowed by robots.txt?
`ip_lookup`	Owner, network and country of an IP address

🗺️ Places

Tool	What it does
`country_info`	Country data (capital, currency, languages…)
`airport_info`	Airport by IATA/ICAO code
`airport_search`	Search airports by name or city
`airport_distance`	Distance between two airports
`city_search`	Find a city (coordinates, population, country)
`reverse_geocode`	Nearest city to a latitude/longitude
`distance_between_places`	Distance between two places or coordinates
`postal_code_lookup`	Place of a postal / ZIP code

📝 Text & language

Tool	What it does
`dictionary_define`	English definitions of a word
`synonyms`	Synonyms of an English word
`rhymes`	Rhymes of an English word
`spell_check`	English spell check with suggestions
`summarize`	Summarize a text or web page
`extract_keywords`	Keywords of a text (58 languages)
`detect_language`	Language of a text

🧮 Other

Tool	What it does
`nutrition_search`	Nutrition facts of foods (USDA)
`nutrition_calculate`	Calories and macros of a list of ingredients
`decode_vin`	Decode a vehicle VIN
`convert_units`	Convert units of measure
`hash_text`	MD5 / SHA hashes of a text
`generate_password`	Secure random passwords

All tools are read-only (readOnlyHint: true). Full API documentation: developers.tidydata.workers.dev

Data sources

European Central Bank reference rates · date-holidays (CC BY 3.0) · GeoNames (CC BY 4.0) · OurAirports (public domain) · USDA FoodData Central (public domain) · WordNet / CMU dictionaries · SCOWL word lists · public DNS resolvers and RDAP.

License

MIT for this repository (documentation and configuration). The hosted service is free within the daily limit above.

TidyData Tools

What it does

What it costs

Tools

Read · 18Look things up

Act · 1Change something

Other · 30Neither hinted nor named

TidyData MCP Server

Connect

Example prompts

Tools

📅 Dates & time

💱 Money

🌐 Web & domains

🗺️ Places

📝 Text & language

🧮 Other

Data sources

More from TidyData

License