bots.st/redbison
RedBison
Convert and compute utilities for text
5819 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 87
- Answered
- 3 of the last 3 calls
How to reach it
- MCP, HTTP
https://mcp.redbison.dev
What it can do
| Tool | What it says it does |
|---|---|
ascii_art_text | Render text as a FIGlet ASCII art banner in one of 7 bundled fonts (Standard, Slant, Small, Big, Doom, ANSI Shadow, Mini), optionally wrapped at a column width and inside code comment markers. Printable ASCII only. The page at redbison.dev/ascii-art-text-generator has more fonts. Returns: Text… |
barcode_check_digit | Compute or validate the GS1 mod-10 check digit of an EAN-8, UPC-A, EAN-13 or ITF-14 (GTIN-8/12/13/14) number. Give the digits without the check digit to compute it, or the full code to validate it. Returns: JSON { digits, checkDigit, fullCode, valid, gtin14, formats[] }. valid is true/false when… |
base64_decode | Base64-decode a string back to UTF-8. Returns: UTF-8 decoded plain text. Example input: {"text":"aGVsbG8gd29ybGQ="} |
base64_encode | Base64-encode a UTF-8 string. Returns: Base64-encoded string (UTF-8 safe). Example input: {"text":"hello world"} |
bcrypt_hash | Hash a password with bcrypt. Returns: Bcrypt hash string (includes cost + salt). Example input: {"password":"s3cret!","cost":10} On error, includes hint: `cost` must be an integer between 4 and 12. Higher cost is exponentially slower. |
bcrypt_verify | Check whether a password matches a bcrypt hash. Returns: JSON { match: boolean }. Example input: {"password":"s3cret!","hash":"$2a$10$abcdefghijklmnopqrstuv"} On error, includes hint: `hash` must be a full bcrypt string starting with $2a$, $2b$, or $2y$. |
bmi_calculate | Calculate Body Mass Index in metric (kg/cm) or imperial (lb/in) units. Returns: JSON { bmi, category } (Underweight / Normal / Overweight / Obese). Example input: {"weight":70,"height":175,"units":"metric"} |
case_convert | Convert text between upper, lower, title, camel, pascal, snake, and kebab case. Returns: String converted to the requested case. Example input: {"text":"hello world example","style":"camel"} On error, includes hint: `style` must be one of: upper, lower, title, camel, pascal, snake, kebab. |
chmod_convert | Convert Unix permissions between octal (755, 4755), symbolic (rwxr-xr-x) and ls -l strings, or apply a chmod expression such as 'go-w,u+x' to a starting mode. Explains each class, setuid/setgid/sticky bits and risky modes, and gives umask defaults. Returns: JSON { octal, symbolic, ls… |
color_convert | Convert a color between hex, rgb, and hsl. Accepts inputs like '#3B82F6', 'rgb(59,130,246)', or 'hsl(217,91%,60%)'. Returns: JSON with hex, rgb, and hsl representations of the color. Example input: {"color":"#3b82f6"} On error, includes hint: `color` accepts #rgb, #rrggbb, rgb(r,g,b), or… |
color_palette | Build a harmonious color palette from one base color (complementary, analogous, triadic, split-complementary, tetradic, square, monochromatic or tints and shades). Returns each color as HEX, RGB, HSL and OKLCH with WCAG contrast against white and black, an 11-step 50-950 scale of the base, and… |
comma_to_lines | Split a delimited string into one item per line. Returns: Multi-line string, one item per line. Example input: {"text":"apple, banana, cherry","separator":",","trim":true} |
compound_interest | Compute compound interest: A = P(1 + r/n)^(nt). Returns: JSON { interest, total } computed as P(1+r/n)^(nt). Example input: {"principal":10000,"annualRatePercent":5,"years":10,"compoundsPerYear":12} |
contrast_check | Compute the WCAG contrast ratio between two hex colors and report AA/AAA pass/fail for normal and large text. Returns: JSON { ratio, AA, AAA, AALarge, AAALarge } for the two colors. Example input: {"foreground":"#ffffff","background":"#3b82f6"} On error, includes hint: Both colors must be hex… |
cron_build | Build a standard five-field cron expression from plain choices (every N minutes, hourly, daily, weekly, monthly, yearly) or explain an existing one. Returns the expression, an English description, the next run times in a time zone, and the same schedule for crontab, Kubernetes, GitHub Actions… |
cron_validate | Validate a standard 5-field cron expression (minute hour day month weekday). Returns a human-readable summary and any parse error. Returns: JSON { valid: boolean, nextRuns?: string[], error?: string }. Example input: {"expression":"*/5 * * * *"} On error, includes hint: `expression` must be a… |
css_beautify | Pretty-print or minify CSS, SCSS or Less, optionally sorting declarations alphabetically. Sorting is cascade-safe: a shorthand and its longhands (border / border-top, margin / margin-top, font / line-height) keep their original relative order. Minify removes comments and whitespace only; values… |
css_gradient | Build a CSS linear or radial gradient string from color stops. Returns: CSS gradient string (linear or radial). Example input: {"type":"linear","angle":45,"stops":["#3b82f6","#8b5cf6"]} On error, includes hint: `type` is 'linear' or 'radial'; provide at least 2 color `stops`. |
csv_to_json | Parse CSV text into JSON. Uses the first row as headers unless header=false. Returns: JSON array of row objects keyed by the header row. Example input: {"text":"name,age\nAda,36\nGrace,85","delimiter":","} On error, includes hint: `text` must be CSV with a header row unless `header:false`. Escape… |
curl_to_code | Convert a curl command (bash/zsh quoting, $'...' strings, \ line continuations, or Windows cmd ^ escaping from 'Copy as cURL') into JavaScript fetch, Node Axios, Python requests, Go net/http or PHP ext-curl. Follows curl semantics: -d implies POST with application/x-www-form-urlencoded, repeated… |
date_diff | Compute the difference between two ISO 8601 timestamps in days, hours, minutes, and seconds. Returns: JSON with milliseconds, totalSeconds/Minutes/Hours/Days, and a { days, hours, minutes, seconds } breakdown. Example input: {"from":"2026-01-01T00:00:00Z","to":"2026-07-11T12:00:00Z"} On error… |
dice_roll | Roll dice from standard notation (3d6+2, d20, d%, 4d6kh3 keep highest, 2d20kl1 keep lowest, 4d6dl1 drop lowest, 1d8+1d6-1) with crypto-random, unbiased dice, and get the exact odds: average, standard deviation, most likely totals and, optionally, the chance of every total counted over all face… |
docker_run_to_compose | Convert one or more 'docker run' commands into a Compose file (services, ports, volumes, environment, networks, healthcheck, GPUs, limits), or convert a compose.yaml back into docker run commands. Unsupported flags are reported as warnings. Returns: run_to_compose: JSON { compose (YAML text)… |
emi_calculate | Compute the equated monthly installment (EMI) for a loan. Returns: JSON { emi, totalInterest, totalPayment } for the loan. Example input: {"principal":500000,"annualRatePercent":8.5,"months":240} |
epoch_convert | Convert between Unix epoch seconds/milliseconds and ISO 8601. Pass a number to convert to ISO, or an ISO string to convert to epoch. Returns: JSON with ISO string, epoch seconds, epoch milliseconds, and a UTC-formatted representation. Example input: {"value":"1700000000"} On error, includes hint… |
escape_characters | Escape or unescape a string for JSON, HTML, XML, JavaScript, or SQL. Returns: Escaped or unescaped string for the chosen format. Example input: {"text":"He said \"hi\"","format":"json","mode":"escape"} On error, includes hint: `mode` is 'escape' or 'unescape'; `format` is one of: json, html, xml… |
find_duplicate_entries | Return lines that appear more than once in the input, with their occurrence counts. Returns: JSON array of { value, count } for lines appearing more than once. Example input: {"text":"apple\nbanana\napple\ncherry\nbanana"} |
get_tool | Get full metadata for a specific RedBison tool by its id (slug). Returns: Full JSON metadata for the tool: { id, name, description, url, category, subcategory?, keywords[] }. Example input: {"id":"jwt-decoder"} |
gitignore_generate | Combine .gitignore templates (based on github/gitignore) for languages, frameworks, tools, editors and operating systems into one deduplicated file, optionally test paths against it. Template ids: node, python, django, jupyter, java, maven, gradle, kotlin, android, go, rust, ruby, rails, php… |
hash | Compute a cryptographic hash of a string. Returns: Hex digest of the input using the requested algorithm. Example input: {"text":"hello world","algorithm":"sha256"} On error, includes hint: `algorithm` must be one of: md5, sha1, sha256, sha384, sha512. |
hash_compare | Hash two inputs with the same algorithm and compare them in constant time. Useful for verifying file integrity. Returns: JSON { match: boolean } computed with a constant-time comparison. Example input: {"a":"hello","b":"hello","algorithm":"sha256"} On error, includes hint: `algorithm` (optional… |
health | Return server status, name, version, and uptime info. Use this to monitor the MCP server. Returns: JSON { status, name, version, startedAt, timestamp }. Example input: {} |
help | Explain how to use any RedBison MCP tool, with its input schema, a sample input and the sample output it produces. Call with no arguments for the list of tools; pass `tool` for one tool, and `calculator` with tool 'run_calculator' for one calculator. Returns: JSON with a tool's { usage, returns… |
hmac | Compute an HMAC (RFC 2104) with SHA-256, SHA-1, SHA-384 or SHA-512 and return it in hex, Base64 and Base64url. Optionally build a GitHub, Stripe or Slack webhook signature, and check an expected signature with a constant-time comparison. Returns: JSON { algorithm, hex, base64, base64url, bits… |
html_beautify | Pretty-print an HTML fragment. Returns: Pretty-printed HTML string with normalized indentation. Example input: {"html":"<div><p>hi</p><p>there</p></div>","indent":2} |
http_status | Look up HTTP status codes: meaning, defining RFC section (RFC 9110 and others from the IANA registry), when to send it and common pitfalls. Pass a code (404), a class (5xx) or words (rate limit). Unofficial nginx and Cloudflare codes are included and flagged. Returns: JSON { query, count… |
ieee754_float | Encode a decimal (0.1, 6.02e23), exact fraction (1/3), hex float (0x1.8p3), inf or nan into IEEE 754-2019 binary16, binary32 or binary64 with round-to-nearest-even, or decode a hex or binary bit pattern. Returns sign, exponent and fraction bits, the class (normal, subnormal, zero, infinity, NaN… |
ip_convert | Convert an IPv4 address between dotted-decimal, integer, binary, and hex forms. Accepts any of those as input. Returns: JSON { decimal, integer, hex, binary } representations of the IPv4 address. Example input: {"value":"192.168.1.1"} On error, includes hint: `value` accepts dotted (192.168.0.1)… |
js_beautify | Format JavaScript, TypeScript or JSX with js-beautify, or minify JavaScript/TypeScript by removing comments and whitespace (no renaming, no rewriting; line breaks are kept where automatic semicolon insertion needs them). The output is re-lexed and compared token by token with the input. Returns… |
json_format | Pretty-print a JSON string with a chosen indent size. Returns: Pretty-printed JSON string with the requested indent, or an error message if the input is invalid. Example input: {"text":"{\"a\":1,\"b\":[2,3]}","indent":2} On error, includes hint: Pass valid JSON as `text` (double-quoted… |
json_schema_validate | Validate a JSON document against a JSON Schema (drafts 06, 07, 2019-09 and 2020-12, via Ajv, all errors reported with JSON Pointer paths and formats such as date-time, email, uuid, ipv4/ipv6 checked), or infer a starter schema from sample JSON. Leave `schema` empty to infer. Returns: Validate… |
json_to_csv | Convert an array of JSON objects to CSV. Columns are inferred from the union of keys. Returns: CSV string with a header row derived from the first object's keys. Example input: {"json":"[{\"name\":\"Ada\",\"age\":36},{\"name\":\"Grace\",\"age\":85}]","delimiter":","} On error, includes hint… |
json_to_yaml | Convert a JSON string to YAML. Returns: YAML representation of the parsed JSON value. Example input: {"json":"{\"name\":\"Ada\",\"skills\":[\"math\",\"logic\"]}"} On error, includes hint: Pass the JSON as `json` (a stringified JSON value), not as a JS object. |
json_validate | Validate a JSON string. Returns { valid, error? }. Returns: JSON { valid: boolean, error?: string }. Example input: {"text":"{\"a\":1}"} On error, includes hint: Pass the JSON string as `text`. |
jwt_decode | Decode a JWT and return its header + payload. Does NOT verify the signature. Returns: JSON with decoded { header, payload, signature } sections of the JWT. Example input: {"token":"eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjMifQ.abc"} On error, includes hint: `token` must be a compact JWT with three… |
lines_to_comma | Join lines with a separator (comma by default). Empty lines are skipped. Returns: Single-line string with items joined by the chosen separator. Example input: {"text":"apple\nbanana\ncherry","separator":", ","quote":false} |
list_calculators | List the calculators that run_calculator can execute (finance, health, maths, statistics, construction, science, everyday and engineering), with each one's inputs, units, defaults and an example. Filter with an optional search query. Returns: JSON { total, calculators[] } where each has { id… |
list_categories | List all tool categories and subcategories available on RedBison. Returns: JSON array of { category, count } entries covering the full RedBison catalog. Example input: {} |
list_compare | Compare two newline-separated lists. Returns union, intersection, only-in-A, and only-in-B. Returns: JSON { union, intersection, onlyInA, onlyInB } arrays. Example input: {"a":"apple\nbanana\ncherry","b":"banana\ncherry\ndate"} |
lorem_ipsum | Generate placeholder lorem ipsum text. Returns: Lorem ipsum text of the requested size. Example input: {"unit":"paragraphs","count":2} |
markdown_table | Turn CSV, TSV (spreadsheet paste) or an existing Markdown table into a GitHub Flavored Markdown table. The first row is the header; pipes are escaped as \|, line breaks inside cells become <br>, and columns can be padded so the pipes line up (CJK-width aware). Returns: Text: the Markdown table… |
mime_lookup | Find the MIME (media) type for a file extension or file name, or the extensions for a MIME type. Returns the type, whether it is IANA-registered, aliases, notes and the Content-Type header to send. Returns: JSON { query, matchedBy: 'extension'|'mime'|'text', count, results[] } with { mime… |
morse_code | Translate text to International Morse code (ITU-R M.1677-1) or Morse back to text. Letters are separated by spaces and words by ' / '. Wrap prosigns in angle brackets (<SOS>, <AR>, <SK>). Also returns the transmission time at a given speed in words per minute, with optional Farnsworth spacing… |
nato_phonetic | Spell text with the ICAO/NATO radiotelephony alphabet (Alfa, Bravo, Charlie...), with ICAO number words (Tree, Fower, Fife, Niner) or plain ones, optional Capital/Lowercase markers for passwords, or decode code words back to text. Same rules as redbison.dev/nato-phonetic-alphabet. Returns: Text… |
number_base_convert | Convert a number between binary, octal, decimal, hex and any base from 2 to 36, with arbitrary-size integers (BigInt), exact fractional parts (repeating digits in parentheses, e.g. 0.1 decimal = 0.0(0011) binary) and an optional two's complement view at a chosen bit width with signed/unsigned… |
password_generate | Generate a cryptographically random password. Choose length and character classes. Returns: Randomly generated password string. Example input: {"length":20,"uppercase":true,"lowercase":true,"digits":true,"symbols":true,"count":1} On error, includes hint: `length` 4-256. Enable at least one… |
password_strength | Estimate how guessable a password is with zxcvbn pattern matching (dictionary words, common passwords, keyboard walks, sequences, dates, l33t). Returns a 0-4 score, estimated guesses, entropy in bits, crack times for online and offline attacks, warnings, suggestions and NIST SP 800-63B-4 length… |
random_email | Generate random-looking (non-deliverable) test email addresses. Returns: JSON array of random email address strings. Example input: {"count":3,"domain":"example.com"} |
random_name | Generate random human names. Returns: JSON array of random human name strings. Example input: {"count":3} |
random_number | Generate cryptographically random numbers in a range. Returns: JSON array of generated numbers. Example input: {"min":1,"max":100,"count":5,"mode":"integer"} |
And 27 more tools.
In its maker's words
500+ free tools over MCP: dev, text and security utilities, 230+ calculators. No sign-up.
- Website
- redbison.dev/mcp
- Publisher
- redbison.dev
- Listed from
- the official MCP Registry as
dev.redbison/mcp - Version
- 2.1.0, updated 29 Oct 2026
- Kinds of work
- Code and developer tools, Writing and translation, Security and trust
The domain it lives on
- redbison.dev
- registered 26 Jun 2025 (1 year ago), at GoDaddy.com, LLC
From our own crawl of domain names: registry records and the home page as our crawler last saw it.
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 5819 ms | |
| Answered | 5041 ms | |
| Answered | 4498 ms |
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