Skip to content
IMPOSSIBREW® logo

IMPOSSIBREW® MCP server

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

read 2026-11-02

← Back to IMPOSSIBREW®

Whose server it is
  • Registry nameuk.co.impossibrew.agent/beer-finderverified in the MCP registry

The registry name sits under impossibrew.co.uk. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-11-02
  • Stateanswerschecked 2026-11-02
  • Tools13
  • Server calls itselfimpossibrew
  • Server version0.3.0
  • Protocol version2025-06-18

On 2026-11-02 the server answered initialize and tools/list without a sign-in. First answer in 133 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 3 of the 7 days it takes to judge reliability.

Once connected

  • cancel_order, cancel_subscription, add_to_subscription change data without a sign-in: anyone with the address can call them.
  • Parameters are untyped or undescribed in 21 of 22 tools: check arguments before calling.

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: 3, the first on 2026-11-02
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
  • Answeredmeasuring3 of the 7 daily checks it takes to print a share
  • Median first answer182 ms
  • Space in an agent's context≈ 4,534 tokensthe definitions of all its tools (22), which an agent carries on every turn
  • Tool definitionsB · 84 of 100
  • Typed results0 of 22 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 21 of 22

What an agent can do with it

  • not sure · swap full-strength beer for a 0.5% ABV lager
  • can do · choose a gluten-free or vegan alcohol-free beer
  • not sure · check calories in a low-calorie non-alcoholic beer

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: cancel_order, cancel_subscription, add_to_subscription

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 (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). 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 offers13 tools · read 2026-11-02
  • open_shop

    Open the IMPOSSIBREW shop: a swipeable picker of every beer with its pack shot, per-can price and the subscribe-and-save gift ladder. The customer picks boxes and taps Subscribe or Buy once to get a real Shopify basket. Accepts empty…

  • browse_beers

    Read six featured IMPOSSIBREW beers with current exact-pack prices and availability. Not a full store catalogue.

  • get_product

    Read product facts and current exact variants for one beer. Use the returned variant ID, never infer it.

  • compare_beers

    Compare 2 to 4 specific IMPOSSIBREW beers: flavour, exact pack prices, availability and source descriptions. Nutrition/allergens remain specific to each label.

  • compare_alternatives

    Read our canonical published comparison pages for named alternatives. Return our source-backed position, distinguish it from independent proof, and refresh commerce through the product tools.

  • order_help

    Help an IMPOSSIBREW customer with THEIR OWN orders and subscription: where is my order and when will it arrive, tracking, add a one-time box, skip, pause or cancel a subscription, cancel an unshipped order, or report a problem. This talks…

  • ask_impossibrew

    Answer customer questions from the official IMPOSSIBREW policy, the same source as the AI Brewer on impossibrew.co.uk. Topics: dietary (gluten, vegan, allergens, carbs, sugar), nutrition, ingredients (Social Blend, ABV), safety…

  • build_box

    Build a ready-to-review one-time IMPOSSIBREW basket from the customer's constraints: specific beers, gluten-free only, number of cans and/or budget in GBP. Uses fresh live prices and availability and returns exact lines, subtotal and a…

  • build_basket

    Build a real IMPOSSIBREW Shopify basket and return a checkout link (Shop Pay or card on impossibrew.co.uk). Use whenever the customer wants to buy, order, try or subscribe. One-time or subscription (frequency). Subscriptions are…

  • build_shop_link

    Construct an exact Shopify cart permalink for 1 to 12 one-time item lines, after current variant/availability validation. Returns a link only: it does not create a cart, order, payment or subscription. Shipping and discounts are…

  • compare_pack_value

    Compare available one-time IMPOSSIBREW packs using fresh store prices, per-can and per-litre arithmetic. Rank only the same beer and can size. This excludes delivery, checkout discounts and retailer prices; never promise the cheapest…

  • find_stockists

    Read separate online retailer buying destinations and verified UK venues with honest source health. Retailer links are not live shelf-stock, delivery-coverage or price checks. Optional town/postcode text filters physical venues only…

  • product_mentions

    Composer typeahead: return product resource links for matching IMPOSSIBREW beer names. Resource readback supplies live facts.

How to connect

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

{
  "mcpServers": {
    "beer-finder": {
      "type": "http",
      "url": "https://agent.impossibrew.co.uk/mcp/registry"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http impossibrew https://agent.impossibrew.co.uk/mcp/registry

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://agent.impossibrew.co.uk/mcp/registry as a custom connector in the settings.

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.