Document Tools in Claude
Count text, make .ics and CSV. The MCP server is https://docs.openkrill.app/mcp. No key. The steps below are only for Claude. A call to count_text was checked against that server on 2026-10-01.
What this server answers
Count the words in a text, make a calendar file you can open in any calendar app, or turn a table into a CSV file, and get the result right every time.
Ask "how many words and characters is this?", "will this fit in one SMS?", "make a calendar file for a meeting every Monday at 10 in New York" or "put these rows in a CSV I can open in Excel".
Document Tools counts characters, words, sentences, paragraphs and lines, reports how many SMS segments a message takes, estimates reading time and gives Flesch reading scores. The counting rules are stated in every answer, so you can see what a word or a character means.
It writes standard calendar files (RFC 5545 .ics) with one or many events, time zones, repeats, reminders and all-day events, and standard CSV files (RFC 4180) with correct quoting and an optional byte order mark for Excel.
Each file comes back as text you can copy and as a download link. The link works for 24 hours; after that the file is deleted. The text you ask it to count is never stored, and the only lasting record is a daily count of calls per tool.
Text counted is limited to about 3,500 words; a calendar file to 50 events; a CSV to 2,000 rows and 100 columns.
What it can do
- Counts characters, words, sentences, paragraphs and lines, with the counting rules stated
- Reports SMS encoding and how many segments a message takes
- Estimates reading time and Flesch reading scores for English text
- Makes .ics calendar files with time zones, repeats, reminders and all-day events
- Makes CSV files with correct quoting and an optional Excel byte order mark
- Returns the file text and a download link that works for 24 hours
Tools
count_text, Count words and characters. Use this when the user asks how long a text is, for example "how many words is this", "character count for this tweet", "will this fit in one SMS", "how long does this take to read". Pass the text exactly as written, at most 20,000 characters. Returns characters, characters without spaces, graphemes (user-perceived characters), words, sentences, paragraphs, lines, UTF-8 bytes, SMS encoding and segments, reading minutes, and Flesch reading ease and grade level (English only; null otherwise), with the rules used for each count. The text is not stored.make_calendar_file, Make a calendar (.ics) file. Use this when the user wants a calendar file, for example "make a calendar file for this meeting", "create an .ics for my weekly class", "export these dates so I can import them". Pass 1 to 50 events, each with a title, a start (a date for an all-day event, or a date and time) and an end or duration_minutes, plus a timezone (IANA name such as America/New_York) for a time without Z or an offset. Optional per event: location, description, reminder_minutes and a repeat (freq daily, weekly, monthly or yearly with interval, until or count, and byday for weekly). Returns the .ics text, a download link that works for 24 hours, its expiry and the event count. It makes a file only; it does not add anything to a calendar.make_csv_file, Make a CSV file. Use this when the user wants a CSV file, for example "put this table in a CSV", "make a spreadsheet file from these rows", "export this list as CSV for Excel". Pass columns (header names) and rows (each row has one cell per column; cells are text, numbers, true or false, or null), up to 2,000 rows and 100 columns. Optional: filename, excel_bom (start the file with a UTF-8 byte order mark so Excel reads accents) and escape_formulas (show cells starting with = + - or @ as text). Returns the CSV text, a download link that works for 24 hours, its expiry and the row count. It makes a file only; it does not open or edit spreadsheets.
Add Document Tools in Claude
Claude connects to a remote MCP server as a custom connector. The connection is made from Anthropic's cloud, not from your laptop, so the server must be on the public internet. Document Tools is. These steps were checked against Claude's custom-connector article (updated 2026-08-11) and the Claude Code MCP docs on 2026-10-01.
On a Pro or Max plan:
- Open Customize, then Connectors.
- Select the plus button, then Add custom connector.
- Paste
https://docs.openkrill.app/mcp. Leave Advanced settings empty: this server does not need an OAuth client id or secret. - Select Add. The connector is yours. Anthropic has not reviewed it, and it is not a Directory listing.
- In a conversation, open the plus button, then Connectors, and enable Document Tools. Ask: How many words and characters is this text?
On Team and Enterprise, an Owner adds the connector first at Organization settings, then Connectors, then Add, then Custom, then Web, and pastes the same URL. Members then connect it from Customize. A Free plan can add one custom connector.
In Claude Code, add it from the project directory:
claude mcp add --transport http docs https://docs.openkrill.app/mcpThat writes a local or user config. A JSON entry needs "type": "http" (or streamable-http) plus the url. An entry with a url and no type is skipped. Confirm with claude mcp get docs. The tools you should see are count_text, make_calendar_file, make_csv_file.
Enable the connector only in conversations that need it. Claude can call the tools while you work, including during research, so turn off any tool you do not want invoked. Document Tools does not write to your accounts. It still receives the arguments of each call. Read the privacy page before you paste anything that is not public.
A call checked on 2026-10-01
A short sentence is enough to show word and character counts. The text is not stored. The request below was posted to https://docs.openkrill.app/mcp as tools/call. HTTP 200. Source: the Document Tools server, read 2026-10-01.
{
"method": "tools/call",
"params": {
"name": "count_text",
"arguments": {
"text": "Agent tools answer public questions."
}
}
}- words. 5
- characters. 36
- sentences. 1
Repeat the call yourself if you need a newer reading. Cached answers expire. A rate limit is not a result: wait and try again. Nothing in the call is a ranking, a filing, or advice.