dropcoin-utility

Utility data for AI agents: IBAN, EU holidays, VAT rates, time zones, ECB FX.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Utility data for AI agents: IBAN, EU holidays, VAT rates, time zones, ECB FX. Pay per call.

    How to connect

    How to connect dropcoin-utility to Claude

    The server address to paste into Claude settings:

    https://utility-api.dropcoin.workers.dev/mcp

    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 dropcoin-utility to ChatGPT

    The server address to paste into ChatGPT settings:

    https://utility-api.dropcoin.workers.dev/mcp

    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 dropcoin-utility to Cursor

    The server address to paste into Cursor settings:

    https://utility-api.dropcoin.workers.dev/mcp

    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 (5)

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

    validate_ibanFree IBAN check (ISO 13616 check digits + country length), rate-limited per IP, no API key needed. For volume use the paid HTTP endpoint POST /v1/iban/validate (1 credit) — it has no IP limit.
    get_holidaysPublic holidays for an EU country and year (2026-2028), optionally narrowed to a German region (e.g. BY). 2 credits, requires an API key.
    get_vat_rateStandard and reduced VAT rates for an EU country (EU TEDB). 1 credit, requires an API key.
    get_timezoneCurrent UTC offset, DST flag and local time for an IANA zone (e.g. Europe/Berlin) or the zone list for a supported ISO-2 country code. 1 credit, requires an API key.
    get_fx_rateECB reference rates. Omit from/to for the full latest table, or pass from+to (+amount, default 1) to convert. 2 credits, requires an API key.