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shortfx

"Write less, do more." "The deterministic toolset your AI agents can trust."

shortfx is a Python library that encapsulates complex programming logic into 3,000+ reusable functions, organized like Excel formulas. It also serves as a deterministic toolset for AI agents via llms.txt and a built-in MCP server.

  • 3,000+ Functions

    The largest open-source Python formula library — dates, math, finance, statistics, strings, Excel & VBA compatibility.

    Browse modules

  • AI-Native via MCP

    Built-in Model Context Protocol server lets AI agents discover, inspect, and execute any function as a tool.

    AI integration

  • Zero Dependencies

    Core library uses only the Python standard library — no NumPy, no Pandas.

    Get started

  • llms.txt Included

    A machine-readable function catalogue so LLMs can look up signatures and descriptions without calling a server.

    Learn more

Module Overview

Module Functions Scope
fxNumeric 1,602 Finance, statistics, geometry, transforms, series, number theory
fxExcel 489 Excel-compatible formulas (VLOOKUP, PMT, CONCATENATE …)
fxString 331 Text manipulation, regex, hashing, validation, encoding, similarity
fxDate 261 Date operations, evaluations, conversions, system dates
fxVBA 133 VBA/Access-compatible functions (Left, InStr, Format …)
fxPython 116 Iterable utilities, type conversions, logic helpers

Quick Example

from shortfx import fxDate, fxExcel, fxNumeric

# Date arithmetic
from datetime import datetime
new_date = fxDate.date_operations.add_time_to_date(datetime(2025, 1, 15), 30, "days")

# Excel-style VLOOKUP
table = [["Name", "Age"], ["Ana", 25], ["Juan", 30]]
age = fxExcel.VLOOKUP("Ana", table, 2)  # 25

# Financial calculations
fv = fxNumeric.finance_functions.future_value(rate=0.05, nper=10, pmt=-100, pv=-1000)