MAD Synapse · Utils

Exact local utils: QR, hashing/encoding, JSON Schema, cron, markdown, diff, units, JWT, random.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Exact local utils: QR, hashing/encoding, JSON Schema, cron, markdown, diff, units, JWT, random.

    How to connect

    How to connect MAD Synapse · Utils to Claude

    The server address to paste into Claude settings:

    https://agent.maddegen.art/hub/mcp/util

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect MAD Synapse · Utils to ChatGPT

    The server address to paste into ChatGPT settings:

    https://agent.maddegen.art/hub/mcp/util

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect MAD Synapse · Utils to Cursor

    The server address to paste into Cursor settings:

    https://agent.maddegen.art/hub/mcp/util

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (10)

    Raw names from tools/list. Only developers need these.

    qr_codeMake a QR code for any text, URL, Solana Pay / wallet address or Wi-Fi login — as a PNG (base64 data URL) or SVG, with size, margin, colours and error correction. Rendered on our server. For Wi-Fi pass wifi_ssid + wifi_password; for Solana Pay pass a solana: URI as text. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    hash_encodeHash data (SHA-256/512, SHA3, Keccak-256, BLAKE2, MD5, SHA-1, RIPEMD-160, HMAC) and convert between utf8, hex, base64, base64url and base58 — exact, in one call. Useful for signatures, content addressing, EVM selectors (keccak of a function signature), and decoding blobs agents are handed. Input can itself be hex/base64/base58. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    json_schema_validateValidate JSON data against a JSON Schema (draft-07/2019-09/2020-12, formats like email/uri/date-time) and get every error with its exact path — check tool I/O before acting on it. Ajv, strict about types, all errors reported. Pass data and schema as JSON values (or JSON strings). Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    cron_explainExplain a cron expression in plain English and list its next N run times in any time zone — catch a schedule mistake before it fires at 3 am. Supports 5-field and 6-field (seconds) cron, ranges, steps, L/W/#, and nicknames (@daily, @hourly…). Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    markdown_convertConvert Markdown to clean HTML (GitHub-flavoured: tables, task lists, fenced code) or HTML back to Markdown. marked for md→html, Turndown for html→md. Scripts/styles are dropped on html→md. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    text_diffDiff two texts: unified diff (patch format), a line/word-level change list, and similarity % — compare versions of a doc, config or code. jsdiff. mode=lines gives a unified patch; mode=words gives word-level changes for prose. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    unit_convertConvert between units of length, mass, volume, temperature, speed, area, time, data size, energy, power, pressure, frequency and more — or list every unit a value converts to. Exact conversion tables (convert-units). Use abbreviations: m, km, mi, ft, kg, lb, oz, l, gal, C, F, K, km/h, mph, knot, B, KB, MB, GB (binary, 1 GB = 1024 MB), J, kWh, W, Pa, bar, psi, Hz… Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    jwt_decodeDecode a JSON Web Token's header and claims, show issued/expiry times in plain dates and whether it has expired — optionally verify an HS256/384/512 signature with a secret. Decoding does not need the key. Never paste production secrets into third-party tools you do not trust; verification here is local and nothing is stored or logged. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    random_genCryptographically secure randomness: UUID v4/v7, passwords, API-key-style tokens, integers in a range, dice, coin flips, or a fair shuffle / pick from a list. Node's CSPRNG. Output is generated fresh per call and never stored or logged. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    text_statsCount characters, words, sentences, lines and paragraphs, estimate LLM tokens, reading time and readability (Flesch), and pull out every URL, email, @handle, #tag, number and crypto address. Token count is an estimate (~4 characters per token for English; code and non-Latin scripts differ). Extraction uses strict patterns; EVM addresses are checksum-validated. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).