useSignal
QR codes, JSON diff/format, hashes, JWT, cron, timestamps, placeholders, flowcharts, forms, regex.
Sollte ich dies verwenden
Qualität und Sicherheit
Befunde (3)
- HIGHTool poisoning patterns detected
- MEDIUMTool 'usesignal_placeholder_image' description contains placeholder textin usesignal_placeholder_image
- INFOTool description contains placeholder or incomplete textin usesignal_placeholder_image
Basierend auf einer automatisierten Analyse der Tool-Definitionen und der Einhaltung des Protokolls.
Kontextkosten
Dies ist die ungefähre Anzahl der Tokens, die jedes Mal verbraucht werden, wenn die Tools des Servers in den Kontext eines Modells geladen werden. Höhere Werte verringern die Aufmerksamkeit, die für andere Aufgaben verfügbar ist.
Installieren
Installation mit einem Klick
Fügen Sie dies Ihrer Datei `claude_desktop_config.json` hinzu:
{
"mcpServers": {
"usesignal": {
"url": "https://www.usesignal.dev/mcp"
}
}
}Remote-Endpunkte
https://www.usesignal.dev/mcpstreamable-httpWas es kann
Tool-Inventar
Tools (12)
🟢usesignal_generate_form(json, title, overrides)
Generate an editable form from a JSON object. Returns nested field paths, JSON Schema, HTML, React JSX and config exports. Arrays and nulls use JSON textareas. Values are processed in memory; avoid secrets. To show an interactive preview, call usesignal_open_workbench with this result input.
Eingabe-Schema
{
"type": "object",
"properties": {
"json": {
"type": "string",
"maxLength": 50000
},
"title": {
"type": "string",
"maxLength": 120,
"default": "Generated form"
},
"overrides": {
"type": "array",
"items": {
"type": "object",
"properties": {
"path": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 9
},
"label": {
"type": "string",
"maxLength": 120
},
"type": {
"type": "string",
"enum": [
"text",
"email",
"number",
"checkbox",
"textarea"
]
},
"required": {
"type": "boolean"
}
},
"required": [
"path"
],
"additionalProperties": false
},
"maxItems": 100,
"default": []
}
},
"required": [
"json"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_generate_colors(baseColor)
Generate light and dark semantic color tokens from a six-digit hex brand color. Returns a shade scale, measured text contrast checks and CSS, JSON and Tailwind exports. This measures listed color pairs only, not whole-page accessibility. Call usesignal_open_workbench with the result input to preview.
Eingabe-Schema
{
"type": "object",
"properties": {
"baseColor": {
"type": "string",
"pattern": "^#[0-9a-fA-F]{6}$"
}
},
"required": [
"baseColor"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_test_regex(pattern, flags, text, tests)
Execute a JavaScript regular expression against text and expected match/non-match test cases. Returns indexed matches and capture groups. Flags use JavaScript semantics. Execution times out after 500ms. Call usesignal_open_workbench with result input to highlight matches.
Eingabe-Schema
{
"type": "object",
"properties": {
"pattern": {
"type": "string",
"maxLength": 1000
},
"flags": {
"type": "string",
"maxLength": 8,
"default": "g"
},
"text": {
"type": "string",
"maxLength": 20000
},
"tests": {
"type": "array",
"items": {
"type": "object",
"properties": {
"text": {
"type": "string",
"maxLength": 2000
},
"shouldMatch": {
"type": "boolean"
}
},
"required": [
"text",
"shouldMatch"
],
"additionalProperties": false
},
"maxItems": 50,
"default": []
}
},
"required": [
"pattern",
"text"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_generate_qr(type, values, dark, light, moduleStyle, ...)
Generate a scannable QR code for a link, text, Wi-Fi network, contact card (vCard), email, SMS, phone number, WhatsApp chat or UPI payment. Returns the encoded payload, an SVG file and a PNG preview image. values by type: url{url}; text{text}; wifi{ssid,password,security:WPA|WEP|nopass,hidden}; vcard{firstName,lastName,phone,email,org,title,website,address}; email{to,subject,body}; sms{phone,message}; phone{phone}; whatsapp{phone,message}; upi{vpa,name,amount,note}.
Eingabe-Schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"url",
"text",
"wifi",
"upi",
"vcard",
"whatsapp",
"email",
"sms",
"phone"
]
},
"values": {
"type": "object",
"additionalProperties": {
"anyOf": [
{
"type": "string",
"maxLength": 2000
},
{
"type": "boolean"
},
{
"type": "number"
}
]
}
},
"dark": {
"type": "string",
"pattern": "^#[0-9a-fA-F]{6}$",
"default": "#111111"
},
"light": {
"$ref": "#/properties/dark",
"default": "#FFFFFF"
},
"moduleStyle": {
"type": "string",
"enum": [
"square",
"rounded",
"dots"
],
"default": "square"
},
"errorCorrection": {
"type": "string",
"enum": [
"L",
"M",
"Q",
"H"
],
"default": "M"
},
"margin": {
"type": "integer",
"minimum": 0,
"maximum": 16,
"default": 4
}
},
"required": [
"type",
"values"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_encode_decode(operation, text)
Exact text transforms: Base64 encode/decode (UTF-8), URL encode/decode, decode a JWT header and payload with readable exp/iat/nbf dates (the signature is not verified), or hash text with MD5, SHA-1, SHA-256 and SHA-512. Use this instead of computing hashes or Base64 by hand.
Eingabe-Schema
{
"type": "object",
"properties": {
"operation": {
"type": "string",
"enum": [
"base64_encode",
"base64_decode",
"url_encode",
"url_decode",
"jwt_decode",
"hash"
]
},
"text": {
"type": "string",
"maxLength": 100000
}
},
"required": [
"operation",
"text"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_explain_cron(expression, timeZone, count)
Explain a standard 5-field cron expression (minute hour day-of-month month day-of-week) in plain English and list its next run times in a given time zone, handling daylight saving time.
Eingabe-Schema
{
"type": "object",
"properties": {
"expression": {
"type": "string",
"maxLength": 200
},
"timeZone": {
"type": "string",
"maxLength": 64,
"default": "UTC",
"description": "IANA time zone, e.g. Asia/Kolkata or America/New_York"
},
"count": {
"type": "integer",
"minimum": 1,
"maximum": 20,
"default": 5
}
},
"required": [
"expression"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_convert_timestamp(value, timeZone)
Convert a Unix timestamp (seconds or milliseconds) or an ISO 8601 date into ISO, UTC, epoch seconds/milliseconds, a relative time and the local time in a given time zone.
Eingabe-Schema
{
"type": "object",
"properties": {
"value": {
"type": "string",
"maxLength": 100
},
"timeZone": {
"type": "string",
"maxLength": 64,
"default": "UTC",
"description": "IANA time zone, e.g. Asia/Kolkata or America/New_York"
}
},
"required": [
"value"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_diff_json(left, right, arrays)
Compare two JSON documents structurally and list every added, removed and changed value with its JSONPath. Numbers compare exactly. Arrays match by content by default, so an inserted item shows as one addition; use arrays:"position" to compare index by index.
Eingabe-Schema
{
"type": "object",
"properties": {
"left": {
"type": "string",
"maxLength": 200000
},
"right": {
"type": "string",
"maxLength": 200000
},
"arrays": {
"type": "string",
"enum": [
"content",
"position"
],
"default": "content"
}
},
"required": [
"left",
"right"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_format_json(json, mode, indent, sortKeys, repair)
Validate, pretty-print or minify JSON, optionally sorting keys. Invalid JSON reports the exact line and column; with repair (default on) it fixes common problems such as trailing commas, single quotes, comments and unquoted keys, and lists each fix.
Eingabe-Schema
{
"type": "object",
"properties": {
"json": {
"type": "string",
"maxLength": 200000
},
"mode": {
"type": "string",
"enum": [
"format",
"minify"
],
"default": "format"
},
"indent": {
"type": "string",
"enum": [
"2",
"4",
"tab"
],
"default": "2"
},
"sortKeys": {
"type": "boolean",
"default": false
},
"repair": {
"type": "boolean",
"default": true
}
},
"required": [
"json"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_placeholder_image(width, height, text, background, color, ...)
Create a placeholder image URL (served by usesignal.dev) plus HTML, Markdown and CSS snippets, for mockups, prototypes, seed data and layouts. Width and height up to 4000 px.
Eingabe-Schema
{
"type": "object",
"properties": {
"width": {
"type": "integer",
"minimum": 1,
"maximum": 4000
},
"height": {
"type": "integer",
"minimum": 1,
"maximum": 4000
},
"text": {
"type": "string",
"maxLength": 120
},
"background": {
"type": "string",
"pattern": "^#[0-9a-fA-F]{6}$"
},
"color": {
"$ref": "#/properties/background"
},
"style": {
"type": "string",
"enum": [
"minimal",
"grid",
"gradient",
"dark",
"glass"
],
"default": "minimal"
},
"pattern": {
"type": "string",
"enum": [
"plain",
"grid",
"diagonal",
"dots",
"minimal"
]
},
"radius": {
"type": "integer",
"minimum": 0,
"maximum": 999
}
},
"required": [
"width",
"height"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_flowchart(mode, input, direction)
Turn JavaScript/TypeScript code, arrow steps or Mermaid-style arrows into a flowchart, returned as Mermaid source and an SVG diagram. Steps mode uses one flow per line: "Start -> Validate -> Save" and branches like "Validate -- No --> Show error".
Eingabe-Schema
{
"type": "object",
"properties": {
"mode": {
"type": "string",
"enum": [
"code",
"steps",
"mermaid"
]
},
"input": {
"type": "string",
"maxLength": 20000
},
"direction": {
"type": "string",
"enum": [
"vertical",
"horizontal"
],
"default": "vertical"
}
},
"required": [
"mode",
"input"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢usesignal_open_workbench(tool, input)
Show the editable useSignal UI. First call a useSignal data tool, then pass its returned input and matching tool name. Recomputes from validated inputs; no shared state.
Eingabe-Schema
{
"type": "object",
"properties": {
"tool": {
"type": "string",
"enum": [
"usesignal_generate_form",
"usesignal_generate_colors",
"usesignal_test_regex",
"usesignal_generate_qr",
"usesignal_encode_decode",
"usesignal_explain_cron",
"usesignal_convert_timestamp",
"usesignal_diff_json",
"usesignal_format_json",
"usesignal_placeholder_image",
"usesignal_flowchart"
]
},
"input": {
"type": "object",
"additionalProperties": {}
}
},
"required": [
"tool",
"input"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}Community
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