TinyFn – Your agent sucks at math

Show HN: TinyFn – 500 deterministic utility APIs for AI agents (via MCP)

TinyFn – Your agent sucks at math is a business in show hn launch.

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Hey HN,I built TinyFn because LLMs are bad at the boring stuff — counting letters, validating emails, converting units. But they're even worse at things that are literally impossible for them: hashing, regex execution, UUID generation. An LLM will never produce a correct SHA256 hash.TinyFn is a set of 500+ simple, deterministic utility endpoints that agents can call via MCP or plain REST.The "strawberry" problem is the cliché example, but in practice the more painful version is agents confidently returning wrong regex matches, botched conversions, or "valid" email addresses that aren't. These are all things that should just be function calls, not LLM guesses.Technically it's straightforward

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Website: tinyfn.io