このMCPでできること
Provides developer utilities for JSON, encoding, hashing, JWT inspection, cron expressions, regex testing, QR codes, flowcharts, forms, colors, and placeholder assets.
機能
ツール
12
ツール
usesignal_convert_timestamp
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.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['value'], 'properties': {'value': {'type': 'string', 'maxLength': 100}, 'timeZone': {'type': 'string', 'default': 'UTC', 'maxLength': 64, 'description': 'IANA time zone, e.g. Asia/Kolkata or America/New_York'}}, 'additionalProperties': False}
usesignal_diff_json
Compare two JSON documents structurally and list every added, removed and changed value with its JSONPath. Numbers compare exactly. Arrays match by content by default, so an inserted item shows as one addition; use arrays:"position" to compare index by index.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['left', 'right'], 'properties': {'left': {'type': 'string', 'maxLength': 200000}, 'right': {'type': 'string', 'maxLength': 200000}, 'arrays': {'enum': ['content', 'position'], 'type': 'string', 'default': 'content'}}, 'additionalProperties': False}
usesignal_encode_decode
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.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operation', 'text'], 'properties': {'text': {'type': 'string', 'maxLength': 100000}, 'operation': {'enum': ['base64_encode', 'base64_decode', 'url_encode', 'url_decode', 'jwt_decode', 'hash'], 'type': 'string'}}, 'additionalProperties': False}
usesignal_explain_cron
Explain a standard 5-field cron expression (minute hour day-of-month month day-of-week) in plain English and list its next run times in a given time zone, handling daylight saving time.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['expression'], 'properties': {'count': {'type': 'integer', 'default': 5, 'maximum': 20, 'minimum': 1}, 'timeZone': {'type': 'string', 'default': 'UTC', 'maxLength': 64, 'description': 'IANA time zone, e.g. Asia/Kolkata or America/New_York'}, 'expression': {'type': 'string', 'maxLength': 200}}, 'additionalProperties': False}
usesignal_flowchart
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".
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['mode', 'input'], 'properties': {'mode': {'enum': ['code', 'steps', 'mermaid'], 'type': 'string'}, 'input': {'type': 'string', 'maxLength': 20000}, 'direction': {'enum': ['vertical', 'horizontal'], 'type': 'string', 'default': 'vertical'}}, 'additionalProperties': False}
usesignal_format_json
Validate, pretty-print or minify JSON, optionally sorting keys. Invalid JSON reports the exact line and column; with repair (default on) it fixes common problems such as trailing commas, single quotes, comments and unquoted keys, and lists each fix.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['json'], 'properties': {'json': {'type': 'string', 'maxLength': 200000}, 'mode': {'enum': ['format', 'minify'], 'type': 'string', 'default': 'format'}, 'indent': {'enum': ['2', '4', 'tab'], 'type': 'string', 'default': '2'}, 'repair': {'type': 'boolean', 'default': True}, 'sortKeys': {'type': 'boolean', 'default': False}}, 'additionalProperties': False}
usesignal_generate_colors
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.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['baseColor'], 'properties': {'baseColor': {'type': 'string', 'pattern': '^#[0-9a-fA-F]{6}$'}}, 'additionalProperties': False}
usesignal_generate_form
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.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['json'], 'properties': {'json': {'type': 'string', 'maxLength': 50000}, 'title': {'type': 'string', 'default': 'Generated form', 'maxLength': 120}, 'overrides': {'type': 'array', 'items': {'type': 'object', 'required': ['path'], 'properties': {'path': {'type': 'array', 'items': {'type': 'string'}, 'maxItems': 9}, 'type': {'enum': ['text', 'email', 'number', 'checkbox', 'textarea'], 'type': 'string'}, 'label': {'type': 'string', 'maxLength': 120}, 'required': {'type': 'boolean'}}, 'additionalProperties': False}, 'default': [], 'maxItems': 100}}, 'additionalProperties': False}
usesignal_generate_qr
Generate a scannable QR code for a link, text, Wi-Fi network, contact card (vCard), email, SMS, phone number, WhatsApp chat or UPI payment. Returns the encoded payload, an SVG file and a PNG preview image. values by type: url{url}; text{text}; wifi{ssid,password,security:WPA|WEP|nopass,hidden}; vcard{firstName,lastName,phone,email,org,title,website,address}; email{to,subject,body}; sms{phone,message}; phone{phone}; whatsapp{phone,message}; upi{vpa,name,amount,note}.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['type', 'values'], 'properties': {'dark': {'type': 'string', 'default': '#111111', 'pattern': '^#[0-9a-fA-F]{6}$'}, 'type': {'enum': ['url', 'text', 'wifi', 'upi', 'vcard', 'whatsapp', 'email', 'sms', 'phone'], 'type': 'string'}, 'light': {'$ref': '#/properties/dark', 'default': '#FFFFFF'}, 'margin': {'type': 'integer', 'default': 4, 'maximum': 16, 'minimum': 0}, 'values': {'type': 'object', 'additionalProperties': {'anyOf': [{'type': 'string', 'maxLength': 2000}, {'type': 'boolean'}, {'type': 'number'}]}}, 'moduleStyle': {'enum': ['square', 'rounded', 'dots'], 'type': 'string', 'default': 'square'}, 'errorCorrection': {'enum': ['L', 'M', 'Q', 'H'], 'type': 'string', 'default': 'M'}}, 'additionalProperties': False}
usesignal_open_workbench
Open useSignal workbench
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.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['tool', 'input'], 'properties': {'tool': {'enum': ['usesignal_generate_form', 'usesignal_generate_colors', 'usesignal_test_regex', 'usesignal_generate_qr', 'usesignal_encode_decode', 'usesignal_explain_cron', 'usesignal_convert_timestamp', 'usesignal_diff_json', 'usesignal_format_json', 'usesignal_placeholder_image', 'usesignal_flowchart'], 'type': 'string'}, 'input': {'type': 'object', 'additionalProperties': {}}}, 'additionalProperties': False}
usesignal_placeholder_image
Create a placeholder image URL (served by usesignal.dev) plus HTML, Markdown and CSS snippets, for mockups, prototypes, seed data and layouts. Width and height up to 4000 px.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['width', 'height'], 'properties': {'text': {'type': 'string', 'maxLength': 120}, 'color': {'$ref': '#/properties/background'}, 'style': {'enum': ['minimal', 'grid', 'gradient', 'dark', 'glass'], 'type': 'string', 'default': 'minimal'}, 'width': {'type': 'integer', 'maximum': 4000, 'minimum': 1}, 'height': {'type': 'integer', 'maximum': 4000, 'minimum': 1}, 'radius': {'type': 'integer', 'maximum': 999, 'minimum': 0}, 'pattern': {'enum': ['plain', 'grid', 'diagonal', 'dots', 'minimal'], 'type': 'string'}, 'background': {'type': 'string', 'pattern': '^#[0-9a-fA-F]{6}$'}}, 'additionalProperties': False}
usesignal_test_regex
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.
読み取り専用
冪等
入力スキーマ
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['pattern', 'text'], 'properties': {'text': {'type': 'string', 'maxLength': 20000}, 'flags': {'type': 'string', 'default': 'g', 'maxLength': 8}, 'tests': {'type': 'array', 'items': {'type': 'object', 'required': ['text', 'shouldMatch'], 'properties': {'text': {'type': 'string', 'maxLength': 2000}, 'shouldMatch': {'type': 'boolean'}}, 'additionalProperties': False}, 'default': [], 'maxItems': 50}, 'pattern': {'type': 'string', 'maxLength': 1000}}, 'additionalProperties': False}
履歴
最近のツール変更
追加
usesignal_open_workbench
2026年10月4日2:40
追加
usesignal_flowchart
2026年10月4日2:40
追加
usesignal_placeholder_image
2026年10月4日2:40
追加
usesignal_format_json
2026年10月4日2:40
追加
usesignal_diff_json
2026年10月4日2:40
追加
usesignal_convert_timestamp
2026年10月4日2:40
追加
usesignal_explain_cron
2026年10月4日2:40
追加
usesignal_encode_decode
2026年10月4日2:40
追加
usesignal_generate_qr
2026年10月4日2:40
追加
usesignal_test_regex
2026年10月4日2:40
追加
usesignal_generate_colors
2026年10月4日2:40
追加
usesignal_generate_form
2026年10月4日2:40
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