CalcFleet
120+ tested calculators, each also a JSON API and MCP tool
CalcFleet launched on July 8, 2026 with 3 votes, #8,766 of 24,623 launches that month and more than 50% of that year's launches.
What it does
Most calculator sites are 90% ads and hide where the number came from. CalcFleet is the opposite: 121 calculators for money, home, fitness and AI economics, each a tested pure function — never an LLM guess — with sourced formulas and no signup. What stands out: every calculator is also a free MCP tool and a JSON API, so your apps and AI agents call the same math you do. The AI-economics tools (self-host vs API, RAG cost, agent cost per successful task) use dated snapshots of official prices.
CalcFleet executes versioned formulas through web tools, API and MCP, then issues portable VCC receipts showing the inputs, rules, sources and outputs behind each result.
A number is not enough — you need to know how it was calculated. CalcFleet executes versioned formulas and issues portable VCC receipts showing the inputs, rules, sources and outputs behind each result. Companies keep the final number but lose the exact combination that produced it — the formula, its version, the inputs and the data. When the result is questioned months later, the calculation has to be reconstructed by hand. A tiered commission runs as a versioned formula. The VCC records exactly what produced the payout, so the figure can be checked independently later. AI interprets. CalcFleet calculates. VCC provides the evidence. A calculation is a versioned formula with declared rules…from calcfleet.com
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