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WozApi MCP server

Which servers in the official MCP registry are WozApi's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-26

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Whose server it is
  • Registry namenl.woz-api/wozapiverified in the MCP registry

The registry name sits under woz-api.nl. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-26
  • Stateanswerschecked 2026-10-26
  • Tools9
  • Server calls itselfWozapi
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 183 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 1 of the 7 days it takes to judge reliability.

Once connected

  • For "look up the WOZ value of a Dutch address by API call", the likely first call is lookup_woz_value.
  • create_credit_payment_link, add_trial_email change data without a sign-in: anyone with the address can call them.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 1, the first on 2026-10-26
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 1 so far
  • Answeredmeasuring1 of the 7 daily checks it takes to print a share
  • Median first answer801 ms
  • Space in an agent's context≈ 1,477 tokensthe definitions of all its tools (9), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 9 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • can do · look up the WOZ value of a Dutch address by API call
  • not sure · check whether a home falls under a municipal subsidy WOZ threshold
  • not sure · add WOZ values to a spreadsheet of addresses

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

  • Tools that change data, on a server that answers without a sign-in: create_credit_payment_link, add_trial_email

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers9 tools · read 2026-10-26
  • create_credit_payment_link

    Returns a page where the user buys Wozapi credits for single lookups and pays with iDEAL. This tool moves no money. Works when the user is signed in to Wozapi, with the connected API key, or with a trial_code that has the user's e-mail…

  • add_trial_email

    Adds the user's own e-mail address to a trial. The trial grows to 10 addresses in total and the user gets a Wozapi account without a password (they log in with a code sent by e-mail). Only use an address the user typed.

  • get_account_balance

    Returns the remaining credits of the user's own Wozapi account. Needs the user to be signed in to Wozapi, or a Wozapi API key on the connection; when neither is there, the client asks the user to sign in first. Read-only and free.

  • get_address_list

    Returns the status of an address list: trial rows, number of addresses found, price, payment link, progress, and after payment the result rows (at most 50 per call; use offset for more) and a download link for the Excel file. Can wait up…

  • start_address_list

    Starts WOZ lookups for a whole list of Dutch addresses, for example from a spreadsheet the user shared. Runs a free trial on 5 addresses, then gives the price of the full list and a payment page for the user. Returns a list_token for…

  • get_prices

    Returns Wozapi prices: credits for single lookups by quantity, the price of an address list by size, and the trial terms. Read-only and free.

  • lookup_woz_value

    Returns the WOZ values of one Dutch address for all available years, with the address as matched. Costs one trial address or one credit per unique address; the same address again within 7 days, an answer without WOZ values and an error…

  • create_list_payment_link

    Returns the page where the user reviews the trial and the price of the list and pays with iDEAL. This tool moves no money: payment only happens when the user pays on that page. Optionally stores the user's own e-mail address for delivery…

  • start_trial

    Starts a free Wozapi trial without an account and returns a trial_code. The trial covers WOZ value lookups for 5 unique Dutch addresses, or 10 when the user's own e-mail address is given. Pass the trial_code to lookup_woz_value and…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "wozapi": {
      "type": "http",
      "url": "https://woz-api.nl/Api/Mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http woz-api https://woz-api.nl/Api/Mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://woz-api.nl/Api/Mcp as a custom connector in the settings.

OpenAPI spec

14 paths, read 2026-10-26. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.