Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Beschreibung vom Entwickler (englisches Original)
Web production tools for AI agents: contrast, JP text, WebP, JSON-LD, slugs, dates and 40+ more
Diese drei werden nie zu einer Punktzahl zusammengefasst: Meinungen, Messungen und Beliebtheit sind verschiedene Dinge.
Für diesen Server haben wir noch keine Zusammenfassung in einfacher Sprache geschrieben. Unten stehen die Fakten, die wir aus der Registry gelesen haben.
Wähle die KI-App, die du nutzt, und kopiere die Einstellungen.
FIRSTCH_TOOLS_USAGE_LOG, FIRSTCH_APPS_BASE_URL, MARP_CHROME_PATHDu brauchst
Welche App nutzt du?
Wähle oben deine App. Wir merken sie uns, damit der Button beim nächsten Mal „In … installieren“ anzeigt.
Öffne Claude Desktop → Settings → Developer → Edit Config und füge dies in claude_desktop_config.json ein
{
"mcpServers": {
"tools": {
"command": "npx",
"args": [
"-y",
"@first-ch/tools-mcp"
],
"env": {
"FIRSTCH_TOOLS_USAGE_LOG": "your-value",
"FIRSTCH_APPS_BASE_URL": "your-value",
"MARP_CHROME_PATH": "your-value"
}
}
}
}Führe das in deinem Terminal aus
claude mcp add tools --env FIRSTCH_TOOLS_USAGE_LOG=your-value --env FIRSTCH_APPS_BASE_URL=your-value --env MARP_CHROME_PATH=your-value -- npx -y @first-ch/tools-mcpTrag die leeren Werte ein, bevor du ihn startest.
In .cursor/mcp.json in deinem Projekt oder in ~/.cursor/mcp.json einfügen
{
"mcpServers": {
"tools": {
"command": "npx",
"args": [
"-y",
"@first-ch/tools-mcp"
],
"env": {
"FIRSTCH_TOOLS_USAGE_LOG": "your-value",
"FIRSTCH_APPS_BASE_URL": "your-value",
"MARP_CHROME_PATH": "your-value"
}
}
}
}Dein Browser fragt, ob er die App öffnen darf, dann zeigt die App die Einstellungen und bittet dich um Bestätigung. Schlüsselwerte bleiben leer, damit du sie selbst einträgst.
In .vscode/mcp.json in deinem Projekt einfügen
{
"servers": {
"tools": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@first-ch/tools-mcp"
],
"env": {
"FIRSTCH_TOOLS_USAGE_LOG": "your-value",
"FIRSTCH_APPS_BASE_URL": "your-value",
"MARP_CHROME_PATH": "your-value"
}
}
}
}Dein Browser fragt, ob er die App öffnen darf, dann zeigt die App die Einstellungen und bittet dich um Bestätigung. Schlüsselwerte bleiben leer, damit du sie selbst einträgst.
Dieser Server läuft auf deinem Computer, und ChatGPT kann sich nur mit Servern im Internet verbinden. Wähle eine andere App.
Deine Auswahl bleibt in einem Cookie auf diesem Gerät; kein Konto nötig.
FIRSTCH_TOOLS_USAGE_LOG envFIRSTCH_APPS_BASE_URL envMARP_CHROME_PATH envDiese Einstellungen werden aus dem Registry-Eintrag des Entwicklers erzeugt. Wenn in der README etwas anderes steht, folge der README.
Läuft auf deinem Computer; die Tool-Liste erscheint nach der Installation in deiner KI-App.
Wir prüfen Informationen, die jeder sehen kann; den Code haben wir nicht gelesen. Checks, die nicht zutreffen, werden nicht mitgezählt. · Geprüft am 6. Nov. 2026
Der Registry-Name wurde mit dem GitHub-Konto First-CH bestätigt, dem das Repo gehört
Dieses Repo haben wir noch nicht von GitHub gelesen
Dieses Repo haben wir noch nicht von GitHub gelesen
Dieser Server läuft auf deinem Computer; es gibt keinen Endpunkt im Internet
Läuft auf deinem Computer und nutzt stattdessen lokale Einstellungen
Läuft auf deinem Computer; Tool-Listen können wir nur von Endpunkten im Internet lesen
Verglichen mit allen aktiven Servern dieser Kategorie in der Registry. Sterne zählen nur, wenn dem Herausgeber das Repo gehört.
Er hat 1 von 1 zutreffenden Basischecks bestanden. Den Code haben wir nicht gelesen. Bevor du einen Schlüssel oder Token hinzufügst, sieh nach, welche Zugriffe der Server verlangt, und nutze einen Schlüssel, der nur die Berechtigungen hat, die du brauchst.
Die Registry nennt keinen erforderlichen Schlüssel, manche Server bitten dich aber bei der ersten Nutzung, dich anzumelden.
Er läuft auf deinem Computer. Deine KI-App startet ihn bei Bedarf, und die Daten laufen nicht über die Server des Entwicklers (außer der Server ruft selbst einen Onlinedienst auf).
Das GitHub-Repo wurde zuletzt – geändert, und die neueste Version (0.48.0) kam heute in die Registry.
Apps, die MCP unterstützen, etwa Claude Desktop, Claude Code, Cursor und VS Code. Außerdem brauchst du Node.js auf deinem Computer.
In derselben Kategorie: Spec Driven Development, Remote Desktop Commander, Apify MCP Server
Server derselben Kategorie von anderen Entwicklern, sortiert nach Sternen.
So liest du eine Karte:★ GitHub-SterneiDrei Säulen: Bewertungen · Checks · NutzungiAktualisiert = neueste Version in der Registry veröffentlichti
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Extract data from any website with thousands of scrapers, crawlers, and automations on Apify Store ⚡
Unverändert aus dem Repo des Entwicklers übernommen. PopNx MCP hat den Inhalt weder geprüft noch empfiehlt es ihn. HTML, Bilder und Skripte wurden entfernt. Links führen von dieser Website weg.
MCP server exposing First CH Tools' free web-tool logic — WCAG contrast, JP character/X-weight counting, WebP conversion, JSON-LD generation, llms.txt generation, encoding/line-ending conversion, Marp Markdown→slide rendering, Japanese/English test-data generation, text/code diffing, cron-expression explanation, Base64/data-URI encoding, URL query-parameter editing, HTML entity escaping/unescaping, JSON⇄YAML conversion, px ⇄ rem/em unit conversion, colour-code conversion with alpha compositing, MD5/SHA-1/SHA-256/SHA-384/SHA-512 hashing, JWT decoding with expiry and signature checks, User-Agent parsing with device/bot detection, bulk UUID v4 / ULID generation, aspect-ratio calculation with responsive sizing, case conversion between camelCase, snake_case and kebab-case, CSV/TSV ⇄ JSON conversion, IP/CIDR calculation with subnet splitting and IP-range reduction, business-day date calculation with Japanese public holidays, HTML-to-Markdown conversion, Japanese era ⇄ Western date conversion with age calculation, and URL-slug generation from Japanese titles — to AI agents such as Claude Code. All of those run on your machine.
It also ships **app_* tools for the 38 web apps at [apps.first-ch.com](https://apps.first-ch.com) (site checks such as GEO/AI-search readiness, meta tags, security headers, SSL certificates, DNS and email DNS, redirects, broken links, structured data, AI-crawler access, Japanese readability, and AI-assisted business-tone and LP-copy checks). Unlike the local tools, an app_* tool sends its input (a URL, domain name or text) to apps.first-ch.com** and returns the JSON the app's API responds with — see Network access, files and privacy.
日本語版は 後半セクション を参照してください。
Three ways to add this server, pick whichever fits your client.
Requires Node.js `>=24` (all three methods below run the server via npx, so Node must be installed even when the MCP client itself — e.g. Claude Code's native, no-Node install — doesn't strictly require it).
claude mcp add firstch-tools -- npx -y @first-ch/tools-mcp
/plugin marketplace add First-CH/firstch-tools-mcp
/plugin install firstch-tools@first-ch
Add to your client's server config (e.g. mcp.json / claude_desktop_config.json):
{
"mcpServers": { "firstch-tools": { "command": "npx", "args": ["-y", "@first-ch/tools-mcp"] } } }
This server is also registered in the MCP Registry as io.github.First-CH/tools-mcp (see server.json), so registry-aware clients can discover and install it by that name too.
| Tool | What it does | Main input | ||
|---|---|---|---|---|
contrast_check | Computes the WCAG 2.1 contrast ratio between a foreground and background color and returns AA/AAA pass/fail (normal text, large text, UI components) | fg, bg (hex, e.g. #333333 / 333 / fff) | ||
count_chars | Counts Japanese text by grapheme, breaks it down into zenkaku/hankaku, counts lines, and computes the X (Twitter) post weight (zenkaku=2, hankaku=1, URL=23 flat, limit 280) | text | ||
webp_convert | Converts PNG/JPEG files (absolute paths) to WebP using the same libwebp WASM encoder (default quality 80) as the browser tool at tools.first-ch.com/webp/. Output defaults to the same directory as each input with a .webp extension | paths[] (absolute paths), quality? (1-100), outputDir? | ||
jsonld_generate | Generates schema.org JSON-LD for organization / faqpage / service / breadcrumb. Empty fields are omitted automatically. Returns both a json object and a ready-to-embed snippet | type, plus the matching organization / faq / service / breadcrumb object | ||
llmstxt_generate | Generates an llms.txt file (per the llmstxt.org proposed format) summarizing a site for AI crawlers/agents | siteName, summary?, notes?, sections? | ||
encoding_convert | Detects the character encoding (UTF-8 / Shift_JIS), BOM and line endings (CRLF / LF / CR) of a file or text and converts it to UTF-8. Useful for diagnosing garbled Japanese CSVs and for normalising line endings. Output is UTF-8 only — encoding *to* Shift_JIS is not supported (no standard API, and a mapping table would be required). | base64 or text, mode (analyze \ | convert), encoding, newline, bom | |
marp_render | Renders Marp Markdown to slides. Emits a self-contained HTML file (theme CSS inlined; opens in a browser and prints one-slide-per-page) and optionally PDF. Ships a bundled Japanese theme firstch (paper/ink/vermilion; uses IBM Plex Sans JP if installed) used as the default theme. Marp front-matter in the Markdown (theme: / paginate: / size: / ) is honored. | markdown or inputPath, theme?, formats? (html \ | pdf), outputPath?, title? | |
testdata_generate | Generates dummy data for form / CSV-import testing. mode=records returns names, kana readings, addresses, postal codes, emails and phone numbers as CSV/TSV/JSON/XLSX with a choice of encoding (UTF-8 / Shift_JIS), BOM and line endings. format=xlsx returns a real Excel workbook as base64 (or writes it to outputPath) — the ZIP/OOXML parts are assembled directly, with no spreadsheet dependency, and postal codes and phone numbers are written as text cells so leading zeros survive; mode=text returns strings of exactly n-1 / n / n+1 characters for maxlength boundary tests. All output is fictional (emails use the RFC 2606 example.com family). Passing a seed makes the output reproducible | mode?, rows?, fields?, format?, locale?, encoding?, newline?, bom?, header?, seed?, preset?, length?, outputPath? | ||
diff_check | Compares two texts (or two files) and returns the added/removed/changed line counts plus a unified diff (.patch) — the same logic as the browser tool at tools.first-ch.com/diff/. Lines are matched with patience diff (lines occurring exactly once in both sides become anchors), falling back to Myers only inside anchor-less ranges. With format=blocks / both, paired changed lines are also compared at token level (runs of letters/digits are one token, CJK characters one each) and returned as changed_parts, so you can see *which words* changed. CRLF/CR/LF all count as the same line break; trailing-whitespace-only differences are ignored by default | a/b (text) or pathA/pathB (absolute paths), format? (unified \ | blocks \ | both), context?, ignoreWhitespace?, ignoreCase?, words? |
cron_explain | Explains a cron expression in plain language and returns the upcoming run times — the same logic as the browser tool at tools.first-ch.com/cron/. Parsing follows Vixie cron (crontab(5)): ranges, steps, lists, JAN-DEC / SUN-SAT names and the @daily-style shorthands; six fields means the first one is seconds (node-cron / Spring style). warnings call out the traps — day-of-month and day-of-week are OR'd (not AND'd) when both are restricted, */n that does not divide its range evenly is not a uniform interval, and impossible dates such as February 30th never fire. Run times are found on the wall clock of the target time zone and converted back to real instants, so they stay correct across daylight-saving transitions | expression, timeZone? (IANA, default UTC), count? (default 5, max 100), from? (ISO 8601) | ||
base64_encode | Encodes text or a file as Base64 and a data: URI, and returns ready-to-paste HTML / CSS background-image snippets — the same logic as the browser tool at tools.first-ch.com/base64/. With mode="decode" it turns Base64 or a data URI back into bytes, writing them to outputPath when given. For SVG it returns both encodings and defaults to the shorter one (percent-encoding beats Base64, which always inflates by ~33%), always escaping & " < > # %, whitespace and non-ASCII so the URI drops straight into an HTML attribute or a CSS url("…"). Decoding accepts standard or URL-safe Base64, tolerates whitespace and newlines, does not require padding, and trusts the actual magic numbers (PNG/JPEG/GIF/WebP/ico/PDF/zip/woff/woff2/SVG) over the MIME type a data URI claims | mode? (encode default / decode), text? or path?, base64?, outputPath?, urlSafe?, wrap? (76 for MIME), dataUri?, mimeType?, snippets? | ||
url_params | Breaks a URL's query string into keys and values, edits it (set / remove / utm / removeTracking / sort) and rebuilds it — the same logic as the browser tool at tools.first-ch.com/url/. Values come back decoded (%XX to characters, + to a space), and parameters you did not touch are written back byte-for-byte, so calling it with nothing but a url returns exactly what you passed in — signed URLs survive a round trip. reencode normalises the whole query with encodeURIComponent rules instead. warnings flag duplicate keys, unencoded spaces and non-ASCII, broken %XX, + being read as a space, mixed-case UTM values, a missing utm_source/utm_medium, passwords in the URL, credential-looking keys and URLs over 2,000 characters. Relative paths and broken percent-encoding are parsed as far as they can be read instead of throwing. mode="encode" / "decode" converts a bare string instead (scheme: component / uri / form). No network access — the URL is never fetched | url?, mode? (parse default / encode / decode), text?, scheme?, set?, remove?, utm?, removeTracking?, sort?, reencode?, spaceAsPlus? | ||
html_escape | Escapes < > & " ' into HTML entities, or with mode="unescape" turns entities such as &, ' and あ back into characters — the same logic as the browser tool at tools.first-ch.com/html-escape/. Escaping handles & first, so a second pass never double-escapes what the first pass produced; pick named or numeric references (numeric), decide whether quotes are escaped (quotes, mandatory inside an attribute value) and whether ' is written as ' or ' (apos — ' does not exist in HTML 4.01), and encode non-ASCII characters as references (nonAscii) when the charset may not survive the pipeline. Unescaping covers all 252 named references from HTML 4.01 plus decimal and hexadecimal ones, maps C1-range references such as to their Windows-1252 characters as the spec requires, and leaves unknown names, out-of-range numbers and semicolon-less references untouched rather than guessing. notes reports already-escaped input, bare &, missing semicolons, unknown entity names and no-break spaces (U+00A0) | mode? (escape default / unescape), text? or path?, outputPath?, quotes?, apos?, numeric?, nonAscii? (none / named / decimal / hex) |
| json_to_yaml | Converts JSON to formatted YAML, and yaml_to_json converts back — the same logic as the browser tool at tools.first-ch.com/json-yaml/, with no YAML dependency (the parser and writer are implemented in this package). Choose the indent width, the quoting style (quote), how null is written (nullStyle), whether multi-line strings become | blocks (block), whether keys are sorted (sortKeys) and whether the output starts with --- (docStart). Strings another parser could read as a different type — yes / no / on / off, 0755, 12:30, 2026-08-12, anything numeric-looking — plus strings with surrounding whitespace or a leading - / * / # are quoted automatically, so the output means the same thing to a YAML 1.1 parser such as PyYAML. JSON containing comments, trailing commas, single quotes or unquoted keys (as in tsconfig.json) is read and conver
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