RedBison

MCP server · hosted · v2.1.0 · dev.redbison/mcp

Online · tested 1h agoNEW · 2h agoSeen in the registry 1h ago

500+ free tools over MCP: dev, text and security utilities, 230+ calculators. No sign-up.

What it does

RedBison is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

No capability identified yet from its description.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES

Local installNO

Live checkOnline · 82 tools

Version2.1.0

PriceNot in the registry

First seen29 Oct 2026

Last checked1h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 1h ago (live check)

Hosted endpoint

https://mcp.redbison.dev streamable-http

In Claude Code: claude mcp add --transport http redbison https://mcp.redbison.dev

MCP settings (Claude Desktop, Cursor and other MCP clients)

{
  "mcpServers": {
    "redbison": {
      "url": "https://mcp.redbison.dev"
    }
  }
}

Live check

Electra Index connected to the hosted endpoint 1h ago

ONLINE RedBison answered an MCP connection on 29 Oct 2026 and introduced itself as redbison-mcp 2.1.0 (MCP protocol 2025-06-18).

82 tools offered to AI assistants

search_tools · Search RedBison's 500+ tools by keyword: developer utilities, file and media converters, and finance, health, math and engineering calculators. Returns a ranked list with each tool's canonical URL and, when one exists, its in-depth guide. U
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"}
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: {}
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: {}
base64_encode · Base64-encode a UTF-8 string. Returns: Base64-encoded string (UTF-8 safe). Example input: {"text":"hello world"}
base64_decode · Base64-decode a string back to UTF-8. Returns: UTF-8 decoded plain text. Example input: {"text":"aGVsbG8gd29ybGQ="}
url_encode · Percent-encode a string for use in URLs. Returns: Percent-encoded string suitable for URL query values. Example input: {"text":"hello world & friends"}
url_decode · Percent-decode a URL-encoded string. Returns: Percent-decoded plain text. Example input: {"text":"hello%20world%20%26%20friends"}
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
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`.
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` mu
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\",\"a

Show 70 more

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),
yaml_to_json · Convert simple YAML (maps, lists, scalars, flow {} / []) to JSON. Anchors, tags, and complex block scalars are not supported. Returns: Pretty-printed JSON built from the YAML input. Example input: {"yaml":"name: Ada\nskills:\n - math\n - lo
tsv_parse · Parse tab-separated values into JSON. First row is treated as header unless header=false. Returns: JSON array of row objects derived from the TSV header row. Example input: {"text":"name\tage\nAda\t36\nGrace\t85"} On error, includes hint: `
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}
xml_beautify · Pretty-print an XML document. Returns: Pretty-printed XML string with normalized indentation. Example input: {"xml":"<root><a>1</a><b>2</b></root>","indent":2}
yaml_beautify · Normalize YAML indentation and whitespace. Returns: Normalized YAML string (2-space indent, collapsed blank lines). Example input: {"yaml":"a: 1\nb: 2\n\n\nc: 3"}
sql_beautify · Format a SQL query with keyword uppercasing and line breaks before major clauses. Returns: Formatted SQL query with keywords on new lines. Example input: {"sql":"select id,name from users where active=true order by name"}
slugify · Convert text to a URL-safe slug. Returns: URL-safe slug (lowercase, dashes). Example input: {"text":"Hello, World! 2026"}
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:
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 'es
remove_duplicate_lines · Remove duplicate lines from text while preserving first-occurrence order. Returns: Text with duplicate lines removed (order preserved). Example input: {"text":"apple\nbanana\napple\ncherry","caseInsensitive":false,"trim":true}
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"}
remove_extra_spaces · Collapse runs of whitespace inside each line to a single space and trim ends. Returns: Text with runs of whitespace collapsed to a single space. Example input: {"text":"hello world foo"}
remove_empty_lines · Strip blank / whitespace-only lines from the input. Returns: Text with blank lines removed. Example input: {"text":"one\n\ntwo\n\n\nthree"}
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}
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}
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, inc
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, sha
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":"
uuid_generate · Generate one or more v4 UUIDs. Returns: JSON array of v4 UUID strings. Example input: {"count":3} On error, includes hint: `count` must be an integer between 1 and 100.
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,
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 $2a$,
subnet_calculator · Given a CIDR block (e.g. 10.0.0.0/24), return network, broadcast, netmask, first/last host, and host count. Returns: JSON with network, broadcast, first/last host, host count, and mask for the CIDR. Example input: {"cidr":"192.168.1.0/24"}
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 er
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. Examp
timezone_convert · Convert a timestamp between two IANA timezones. Returns the wall-clock time in the target zone. Returns: JSON { utc, zone, local } with the timestamp rendered in the target IANA timezone. Example input: {"timestamp":"2026-07-11T12:00:00Z","
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":"2026-0
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 * *
regex_test · Test a regular expression against text. Returns all matches and capture groups. Returns: JSON { matches: string[], count } of matches for the pattern. Example input: {"pattern":"\\d+","flags":"g","text":"order 42 shipped on day 7"} On error
text_diff · Compute a line-level diff between two strings. Returns a unified-style patch and per-line change list. Returns: JSON line-diff with { added, removed, unchanged } arrays. Example input: {"a":"line 1\nline 2\nline 3","b":"line 1\nline 2 chang
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"}
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 hin
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":"#3b82
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
random_name · Generate random human names. Returns: JSON array of random human name strings. Example input: {"count":3}
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_number · Generate cryptographically random numbers in a range. Returns: JSON array of generated numbers. Example input: {"min":1,"max":100,"count":5,"mode":"integer"}
lorem_ipsum · Generate placeholder lorem ipsum text. Returns: Lorem ipsum text of the requested size. Example input: {"unit":"paragraphs","count":2}
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}
simple_interest · Compute simple interest: I = P × r × t. Returns: JSON { interest, total } computed as P·r·t. Example input: {"principal":10000,"annualRatePercent":5,"years":3}
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}
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"}
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. Return
run_calculator · Run any RedBison calculator by id with named inputs and get the result as JSON: mortgages and loans, savings and investing, pay and tax, body and fitness, maths, statistics, geometry, construction, science and engineering (beams, bolts, wir
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/
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, fullCo
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 d
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 whi
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
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 ord
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 impli
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.
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,
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. Re
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 in
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-le
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 J
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 u
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: 'extensi
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
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 rule
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 atta
readability · Score English text with Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau and the Automated Readability Index, and list hard sentences, passive voice, -ly adverbs and wordy phrases with plainer alternatives. Syllabl
redirect_rules · Generate 301/302/307/308 redirect rules for Apache .htaccess (mod_rewrite), nginx, Netlify _redirects or vercel.json from a list of 'source destination [code]' lines. A source ending in /* moves a whole folder. Also checks for loops, chains
toml_convert · Convert between TOML 1.0, JSON and YAML, validating the input. TOML dates become RFC 3339 strings in JSON; nulls are dropped when writing TOML (it has no null) and reported; integers beyond 2^53 are kept exact; inf and nan become strings in
user_agent_parse · Parse a User-Agent header into browser, engine, OS, device type, vendor, model and CPU (ua-parser-js), and detect search, AI, social, SEO and monitoring bots and HTTP libraries. Notes explain User-Agent reduction limits such as Windows 11 r
utm_build · Add Google Analytics UTM parameters (utm_source, utm_medium, utm_campaign, utm_id, utm_term, utm_content) to a landing page URL. Keeps existing query parameters and the #fragment, lowercases values by default, and predicts the GA4 default c
word_count · Count words, characters (with and without spaces), sentences, paragraphs and lines in text, estimate reading and speaking time, list the most frequent words and check the text against common platform limits (X post weighted length, Bluesky,
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 c

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Facts & evidence

Each fact shows where it was seen and when.

Fact	Value	Evidence	Source	Last confirmed
Hosted endpoint	https://mcp.redbison.dev	DECLARED	SRC-001 Official MCP Registry	1h ago
Local install (package)	no	DECLARED	SRC-001 Official MCP Registry	1h ago
Remote access (hosted)	yes	DECLARED	SRC-001 Official MCP Registry	1h ago
Website	https://redbison.dev/mcp	DECLARED	SRC-001 Official MCP Registry	1h ago
Registry status	active	DECLARED	SRC-001 Official MCP Registry	1h ago
Version	2.1.0	DECLARED	SRC-001 Official MCP Registry	1h ago
MCP server	yes	DECLARED	SRC-001 Official MCP Registry	1h ago

Change history

NEW29 Oct 2026
first seen in the index

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Its hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.

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Questions about RedBison

How do I connect RedBison?

Use the hosted endpoint https://mcp.redbison.dev in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does RedBison offer?

When Electra Index connected on 29 Oct 2026, it listed 82 tools: search_tools, get_tool, list_categories, health, base64_encode, base64_decode, url_encode, url_decode and more. The full list is in "Live check" above.

Is RedBison online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 1h ago.