Developer Tools MCP Server

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answering

Developer Tools is answering right now. Last checked 8 min ago. It exposes 59 tools.

65+ free in-browser developer tools (JSON, Base64, JWT, hash, regex…) callable over MCP.

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 47 days of history

47 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

151 ms

Response time

average over 24h

open, no key

Access

streamable-http

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add developer-tools --transport http https://programmes.net/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "developer-tools": {
      "url": "https://programmes.net/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.developer-tools]
url = "https://programmes.net/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "developer-tools": {
      "url": "https://programmes.net/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "developer-tools": {
      "url": "https://programmes.net/mcp"
    }
  }
}

Available tools 59

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

json

json

Format, minify, validate and convert JSON.. Operations: "format" — Pretty-print JSON with a configurable indent.; "minify" — Strip all insignificant whitespace from JSON.; "validate" — Check whether the input is valid JSON, reporting the error location.; "repair" — Best-effort repair of common JSON mistakes (trailing commas, single quotes, unquoted keys).. Call with "operation" plus "input" (and "options" where relevant).

json-csv

Convert between JSON and CSV.. Operations: "json-to-csv" — Convert a JSON array/object to CSV.; "csv-to-json" — Convert CSV to a JSON array.. Call with "operation" plus "input" (and "options" where relevant).

json-diff

Compare two JSON documents and report added, removed and changed values.. Operations: "diff" — Diff two JSON documents by path.. Call with "operation" plus "input" (and "options" where relevant).

json-schema

Infer a draft-07 JSON Schema from sample JSON.. Operations: "generate" — Infer a draft-07 JSON Schema from sample JSON. Call with "operation" plus "input" (and "options" where relevant).

json-ts

Generate TypeScript type declarations from a JSON sample.. Operations: "generate" — Infer TypeScript interfaces/types from JSON.. Call with "operation" plus "input" (and "options" where relevant).

json-xml

Convert between JSON and XML.. Operations: "to-xml" — Convert JSON to XML.; "to-json" — Convert XML to JSON.. Call with "operation" plus "input" (and "options" where relevant).

color

color

Convert colors between HEX, RGB, HSL, HSV and CMYK.. Operations: "convert" — Convert a HEX color to every supported color space.; "palette" — Generate a color harmony palette from a base color.. Call with "operation" plus "input" (and "options" where relevant).

color-palette

Generate harmony, shade and tint palettes from a base HEX color.. Operations: "generate" — Generate harmony, shade and tint palettes from a base HEX color.. Call with "operation" plus "input" (and "options" where relevant).

css

css-minify

Minify or beautify CSS.. Operations: "minify" — Minify CSS (strip comments and whitespace).; "beautify" — Beautify CSS (one declaration per line, indented).. Call with "operation" plus "input" (and "options" where relevant).

css-units

Convert a numeric value between CSS units (px, rem, em, pt, pc, %).. Operations: "convert" — Convert a numeric value from one CSS unit to another.. Call with "operation" plus "input" (and "options" where relevant).

html

html

Format, minify and validate HTML.. Operations: "format" — Pretty-print HTML.; "minify" — Minify HTML (strip comments and collapse whitespace).; "validate" — Check HTML for unclosed/mismatched tags.. Call with "operation" plus "input" (and "options" where relevant).

html-entity

Encode and decode HTML entities (named, decimal, hex).. Operations: "encode" — Encode text into HTML entities.; "decode" — Decode HTML entities back to plain text.. Call with "operation" plus "input" (and "options" where relevant).

jwt

jwt

Decode JWT header and payload (no signature verification).. Operations: "decode" — Decode a JWT into its header, payload and signature.. Call with "operation" plus "input" (and "options" where relevant).

jwt-encode

Sign a JSON payload into a JWT with an HMAC secret.. Operations: "sign" — Sign a JSON payload into a JWT using an HMAC secret.. Call with "operation" plus "input" (and "options" where relevant).

markdown

markdown

Render Markdown to HTML, build a TOC and compute statistics.. Operations: "render" — Render GitHub-flavored Markdown to sanitized HTML.; "toc" — Extract a table of contents from Markdown headers.; "stats" — Compute document statistics for Markdown/plain text.. Call with "operation" plus "input" (and "options" where relevant).

markdown-table

Convert CSV or TSV rows into a Markdown table.. Operations: "generate" — Build a Markdown table from delimited rows.. Call with "operation" plus "input" (and "options" where relevant).

password

password

Generate strong random passwords and estimate their strength.. Operations: "generate" — Generate a cryptographically random password.; "strength" — Estimate the entropy and strength bucket of a password.. Call with "operation" plus "input" (and "options" where relevant).

password-strength

Analyze a password and estimate its entropy, strength and crack time.. Operations: "analyze" — Analyze a password and estimate its entropy, strength and crack time.. Call with "operation" plus "input" (and "options" where relevant).

url

url

Parse, validate and normalize URLs.. Operations: "parse" — Break a URL into its component parts.; "validate" — Validate a URL and run basic security/heuristic checks.; "normalize" — Normalize a URL (drop default ports, sort query params, strip trailing slash).. Call with "operation" plus "input" (and "options" where relevant).

url-encode

Percent-encode and decode URL strings.. Operations: "encode" — Percent-encode a string.; "decode" — Decode a percent-encoded string.. Call with "operation" plus "input" (and "options" where relevant).

aes

aes-encrypt

Encrypt and decrypt text with AES-GCM using a password.. Operations: "encrypt" — Encrypt plaintext into base64 ciphertext with a password.; "decrypt" — Decrypt base64 ciphertext produced by the encrypt operation.. Call with "operation" plus "input" (and "options" where relevant).

ascii

ascii

Convert text to and from character codes in several bases.. Operations: "to-codes" — Convert text to character codes.; "from-codes" — Convert character codes back to text.. Call with "operation" plus "input" (and "options" where relevant).

base64

base64

Encode and decode text in Base64, Base64URL, Base32, Base58, Base85 and hex.. Operations: "encode" — Encode text into the chosen format.; "decode" — Decode text from the chosen format back to plain text.. Call with "operation" plus "input" (and "options" where relevant).

bcrypt

bcrypt

Hash and verify passwords with bcrypt.. Operations: "hash" — Hash a password with bcrypt at the given cost.; "verify" — Verify a plaintext password against a bcrypt hash.. Call with "operation" plus "input" (and "options" where relevant).

case

case

Convert text between camelCase, snake_case, kebab-case and more.. Operations: "convert" — Convert text to a single chosen case.; "all" — Return every supported case transform at once.. Call with "operation" plus "input" (and "options" where relevant).

char

char-inspector

Break a string into per-character Unicode details.. Operations: "inspect" — Inspect each character of a string (code point, category, bytes).. Call with "operation" plus "input" (and "options" where relevant).

chmod

chmod

Convert between octal and symbolic Unix file permissions.. Operations: "octal-to-symbolic" — Convert octal permissions (e.g. "755") to a symbolic string and description.; "symbolic-to-octal" — Convert a symbolic permission string (e.g. "rwxr-xr-x") to octal.. Call with "operation" plus "input" (and "options" where relevant).

cidr

cidr

Parse a CIDR block into its network, broadcast and host range.. Operations: "calculate" — Calculate the network, broadcast, mask and host range for a CIDR block.. Call with "operation" plus "input" (and "options" where relevant).

contrast

contrast

Check WCAG contrast between a foreground and background color.. Operations: "check" — Compute the contrast ratio and WCAG pass/fail for a color pair.; "best-text" — Pick black or white text for the best contrast on a background.. Call with "operation" plus "input" (and "options" where relevant).

cron

cron

Describe cron expressions and compute upcoming run times.. Operations: "describe" — Produce a human-readable description of a cron expression.; "next-runs" — Compute the next N run times for a cron expression.. Call with "operation" plus "input" (and "options" where relevant).

curl

curl-converter

Convert a curl command into fetch / Python / Node snippets.. Operations: "convert" — Parse a curl command and generate code snippets.. Call with "operation" plus "input" (and "options" where relevant).

data

data-size

Parse a data size and convert it to bytes plus decimal and binary units.. Operations: "convert" — Parse a data size and convert it to bytes, decimal and binary units.. Call with "operation" plus "input" (and "options" where relevant).

diff

diff

Compute a line-by-line diff between two texts.. Operations: "compare" — Diff two texts and return the lines plus statistics.; "unified" — Produce a unified-diff text between two inputs.. Call with "operation" plus "input" (and "options" where relevant).

gitignore

gitignore

Generate a combined .gitignore from template keys.. Operations: "generate" — Combine one or more template keys into a .gitignore.; "templates" — List the available .gitignore template keys.. Call with "operation" plus "input" (and "options" where relevant).

hash

hash

Compute MD5, SHA-1/256/384/512, CRC32 and HMAC digests.. Operations: "hash" — Hash text with the chosen algorithm.; "hmac" — Compute an HMAC digest (SHA algorithms only).. Call with "operation" plus "input" (and "options" where relevant).

hmac

hmac

Sign a message with HMAC using a secret key and SHA-2 algorithm.. Operations: "sign" — Compute an HMAC signature for a message.. Call with "operation" plus "input" (and "options" where relevant).

http

http-status

Look up and search HTTP status codes.. Operations: "lookup" — Look up a single status code by number.; "search" — Search status codes by number, name or description.. Call with "operation" plus "input" (and "options" where relevant).

image

image-base64

Build and parse base64 data URIs and embed snippets.. Operations: "build-snippets" — Build HTML/CSS/Markdown snippets from an existing data URI.. Call with "operation" plus "input" (and "options" where relevant).

jsonpath

jsonpath

Query a JSON document with a JSONPath expression.. Operations: "query" — Evaluate a JSONPath expression against a JSON document.. Call with "operation" plus "input" (and "options" where relevant).

lorem

lorem

Generate placeholder text in several styles.. Operations: "generate" — Generate lorem ipsum (or themed) placeholder text.. Call with "operation" plus "input" (and "options" where relevant).

mime

mime

Look up MIME types by file extension or MIME type.. Operations: "lookup" — Search MIME types by extension or MIME type.. Call with "operation" plus "input" (and "options" where relevant).

morse

morse-code

Translate text to and from Morse code.. Operations: "encode" — Convert text to Morse code.; "decode" — Convert Morse code to text.. Call with "operation" plus "input" (and "options" where relevant).

number

number-base

Convert numbers between binary, octal, decimal and hex.. Operations: "convert" — Convert a number from one base to all supported bases.. Call with "operation" plus "input" (and "options" where relevant).

random

random

Generate cryptographically secure random strings.. Operations: "generate" — Generate a secure random string from a chosen pattern.. Call with "operation" plus "input" (and "options" where relevant).

regex

regex

Test a regex against a string and apply replacements.. Operations: "test" — Find all matches of a regex pattern in a test string.; "replace" — Replace regex matches in a string.. Call with "operation" plus "input" (and "options" where relevant).

roman

roman-numeral

Convert between integers and Roman numerals.. Operations: "to-roman" — Convert an integer to a Roman numeral.; "from-roman" — Convert a Roman numeral to an integer.. Call with "operation" plus "input" (and "options" where relevant).

slugify

slugify

Turn arbitrary text into a clean, URL-safe slug.. Operations: "slugify" — Generate a URL slug from text.. Call with "operation" plus "input" (and "options" where relevant).

sort

sort-lines

Sort, reverse, deduplicate and clean up lines of text.. Operations: "process" — Sort, deduplicate and clean lines of text.. Call with "operation" plus "input" (and "options" where relevant).

sql

sql

Format and minify SQL.. Operations: "beautify" — Beautify SQL with newlines before clauses.; "minify" — Minify SQL to a single line.. Call with "operation" plus "input" (and "options" where relevant).

string

string-escape

Escape and unescape strings for JSON, JS, HTML, URL and regex.. Operations: "escape" — Escape a string for the chosen context.; "unescape" — Unescape a string from the chosen context.. Call with "operation" plus "input" (and "options" where relevant).

timestamp

timestamp

Convert and inspect Unix timestamps and dates.. Operations: "to-date" — Convert a Unix timestamp (seconds) to a full date breakdown.; "parse-date" — Auto-detect and parse a date/timestamp string.. Call with "operation" plus "input" (and "options" where relevant).

totp

totp

Generate a time-based one-time password (TOTP) from a base32 secret.. Operations: "generate" — Generate the current TOTP code for a base32 secret.. Call with "operation" plus "input" (and "options" where relevant).

ulid

ulid

Generate a lexicographically sortable ULID.. Operations: "generate" — Generate a new ULID.. Call with "operation" plus "input" (and "options" where relevant).

user

user-agent

Parse a User-Agent string into browser, engine, OS and device.. Operations: "parse" — Parse a User-Agent string into browser, engine, OS and device details.. Call with "operation" plus "input" (and "options" where relevant).

uuid

uuid

Generate and inspect UUIDs.. Operations: "v4" — Generate one or more random (v4) UUIDs.; "v3" — Generate a name-based (v3 / MD5) UUID.; "parse" — Parse a UUID and report its version, variant and (where present) timestamp.. Call with "operation" plus "input" (and "options" where relevant).

wifi

wifi-qr

Build the standard WIFI: payload string for a WiFi QR code.. Operations: "payload" — Build the WIFI: payload string a phone scans to auto-join a network.. Call with "operation" plus "input" (and "options" where relevant).

word

word-count

Count words/characters and compute readability statistics.. Operations: "count" — Compute basic text statistics (words, characters, sentences, etc.).; "readability" — Compute readability scores (Flesch, SMOG, Coleman-Liau).; "keywords" — Compute keyword density for the text.. Call with "operation" plus "input" (and "options" where relevant).

xml

xml

Pretty-print or minify already-serialized XML, and highlight it.. Operations: "format" — Pretty-print XML with the chosen indent (server-safe string transform).; "minify" — Collapse whitespace between XML tags (server-safe string transform).. Call with "operation" plus "input" (and "options" where relevant).

yaml

yaml-json

Convert between YAML and JSON.. Operations: "yaml-to-json" — Convert YAML to JSON.; "json-to-yaml" — Convert JSON to YAML.. Call with "operation" plus "input" (and "options" where relevant).

Endpoints

URL	Transport	State	Latency	Checked
https://programmes.net/mcp	streamable-http	answering	154 ms	8 min ago

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Developer Tools — questions

Answers built from our own checks of this server.

What can Developer Tools do?

It exposes 59 tools, read directly from the server on our last check. Among them: aes-encrypt, ascii, base64, bcrypt, case, char-inspector and 53 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Developer Tools mostly used for?

Its tools cluster around json, jwt and markdown. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Developer Tools working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 151 ms. The bar chart above shows every period we have measured.

Is Developer Tools still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect Developer Tools?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Developer Tools need an API key?

No. Developer Tools completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 59 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Developer Tools?

It answers our handshake in 151 ms on average, which is faster than 76% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.