Calculate Pool MCP server

• Registry namecom.calculatepool/calculatepoolverified in the MCP registry

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

• Stateanswerschecked 2026-10-29
• Tools5
• Server calls itselfcalculatepool
• Server version1.1.0
• Protocol version2025-06-18

On 2026-10-29 the server answered initialize and tools/list without a sign-in. First answer in 134 ms.

• Its tools do every use case we checked: calculate gallons for an inground or above-ground pool; estimate chemical doses from the pool's volume; size a pump or heater from pool volume.
• Checked on 6 of the 7 days it takes to judge reliability.

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.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 6 so far
• What an agent can do with it3 of 3 use cases
• Answeredmeasuring6 of the 7 daily checks it takes to print a share
• Median first answer120 ms
• Space in an agent's context≈ 1,657 tokensthe definitions of all its tools (5), which an agent carries on every turn
• Tool definitionsA · 97 of 100
• Typed results5 of 5 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 1 of 5

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 →

• pool_volume

  Use this when someone wants to know how many gallons (or litres, cubic feet) a swimming pool holds from its shape and size: rectangle, round, oval, Roman, Grecian, kidney, L-shape or freeform, with one depth, a shallow and a deep end, or…

• chemical_dose

  Use this when someone asks how much of a pool chemical to add to go from a current to a target level: chlorine (liquid chlorine 12.5 %, bleach 10 % or 6 %, cal-hypo 65 % or 73 %, dichlor, trichlor) for free chlorine; salt for a salt…

• pump_size

  Use this when someone asks what size pool pump they need or what flow rate turns their pool over in a given number of hours. Takes gallons and turnover hours (default 8). Returns gallons per minute, gallons per hour, a rule-of-thumb…

• heater_size

  Use this when someone asks what size pool heater (BTU per hour) they need to raise the water a number of degrees Fahrenheit in a given time. Takes gallons, the temperature rise in °F and the hours (default 24), plus an optional buffer for…

• pool_facts

  Use this when someone asks how many gallons a common pool size holds, e.g. a 24 ft round above-ground pool with a 52 in wall or a 16 x 32 inground pool, or wants a table of standard sizes. Returns inground rectangles (12x24 to 25x50 ft at…