MCP server

useSignal

io.github.sanket-naik/usesignal

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

QR codes, JSON diff/format, hashes, JWT, cron, timestamps, placeholders, flowcharts, forms, regex.

Website Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

12

Token cost

About 2,603 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http usesignal https://www.usesignal.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.usesignal]
url = "https://www.usesignal.dev/mcp"

Gemini CLI

{"mcpServers":{"usesignal":{"httpUrl":"https://www.usesignal.dev/mcp"}}}

Cursor

{"mcpServers":{"usesignal":{"url":"https://www.usesignal.dev/mcp"}}}

VS Code

{"servers":{"usesignal":{"type":"http","url":"https://www.usesignal.dev/mcp"}}}

Antigravity

agy mcp add usesignal https://www.usesignal.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"usesignal","server_url":"https://www.usesignal.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"usesignal","server_url":"https://www.usesignal.dev/mcp"}

Tools

• usesignal_convert_timestamp ~157 tokens
  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.
• usesignal_diff_json ~181 tokens
  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.
• usesignal_encode_decode ~186 tokens
  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.
• usesignal_explain_cron ~181 tokens
  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.
• usesignal_flowchart ~184 tokens
  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".
• usesignal_format_json ~205 tokens
  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.
• usesignal_generate_colors ~163 tokens
  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
• usesignal_generate_form ~276 tokens
  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.
• usesignal_generate_qr ~363 tokens
  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}; vcar
• usesignal_open_workbench ~213 tokens
  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.
• usesignal_placeholder_image ~250 tokens
  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.
• usesignal_test_regex ~244 tokens
  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.

Browse

• GitHub tools
• Tailwind tools
• Converting to Markdown
• Email
• SMS and text messages
• WhatsApp

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