Launching today

CalcFleet

Launching today

120+ tested calculators, each also a JSON API and MCP tool

4 followers

120+ tested calculators, each also a JSON API and MCP tool

4 followers

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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.

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Launch tags:Fintech•Developer Tools•Artificial Intelligence

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Customer.ioAutomate Messaging Everywhere — Startups Get 12 Months Free

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Maker

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Hi!! I'm the maker. I built CalcFleet because most calculator sites are 90% ads and you never know where the number actually came from. Three things that make it different: • The math is a tested pure function (~2,300 tests). AI never computes an answer — it only routes your plain-English question to the right calculator. • Every calculator is also a JSON API and a free MCP server, so your software AND your AI agents can call the exact same math you do. There's an llms.txt too. • For builders: a set of AI-economics tools — self-host vs API breakeven, fine-tuning cost, RAG cost per query, agent cost per successful task, prompt-caching savings — priced from dated snapshots of the official pricing pages (the vintage is shown, every number links its source). Also fun: a World Simulator with two macro sliders on live Fed data, and decision "paths" that chain calculators together carrying your numbers from step to step. It's free, no signup. Honest status: the product is deep, the traffic is basically zero — so I'd genuinely love your feedback, and especially: tell me where a number looks off or a price is out of date, and I'll fix the snapshot. What calculator should I build next?

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20h ago

Finally a calculator site that doesn't drown you in ads and actually shows the formula. The MCP and JSON API angle is clever, makes it easy to wire the same numbers into my own tools without rebuilding anything.

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2h ago

Maker

@mbeydogan62553 Thanks! That's exactly the use case I was hoping would land — the API/MCP layer is the part I care about most. Curious what you're building? And would you actually wire this into something in production, or more for personal/side projects? Trying to figure out if people want it at real call volumes or just for quick one-offs.

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1h ago

how do the dated price snapshots get updated, and how do you handle the lag when a vendor like OpenAI changes pricing overnight

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37m ago

Customer.ioAutomate Messaging Everywhere — Startups Get 12 Months Free

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Maker

📌

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20h ago

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2h ago

Maker

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1h ago

how do the dated price snapshots get updated, and how do you handle the lag when a vendor like OpenAI changes pricing overnight

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37m ago