The PathFi Decision Library

Sixteen calibrated decision-math templates covering the choices most worth thinking about. Each runs institutional-grade math on inputs you control — no advice, no narrative, just the numbers.

Open the Library Use from your AI assistant

Money

Decisions where the math actually moves the needle on net worth.

Forecasting & Prediction Markets

Open →

Should I bet on this market? Your odds vs the market's, plus a suggested stake.

evaluate_forecasting_decision

Big Purchase TCO

Open →

Compare 2–4 alternatives on total cost of ownership.

evaluate_big_purchase_decision

Pay Down Debt or Invest

Open →

Future-value comparison with tax + deductibility adjustments.

evaluate_debt_vs_invest_decision

Insurance Buy

Open →

Is this policy worth the premium, given how much risk you can absorb?

evaluate_insurance_decision

Investment Position Sizing

Open →

How much to put on a single yes-or-no bet — deliberately capped at 25% of your bankroll.

evaluate_investment_kelly

Career

Career math without the breathless career-coach prose.

Career Change DCF

Open →

Stay vs new offer: present-value + optionality value.

evaluate_career_dcf_decision

Salary Negotiation

Open →

What to counter-offer, given your best fallback option and how flexible the company is.

evaluate_negotiation_decision

Degree / Bootcamp ROI

Open →

Will the program pay back over your post-grad career?

evaluate_education_decision

Big Decisions

Multi-year tradeoffs where small numerical mistakes compound.

Rent vs Buy

Open →

Break-even years + dollar advantage over your horizon.

evaluate_real_estate_decision

Geographic Relocation

Open →

Compare cities on purchasing power, taxes, and moving cost.

evaluate_geographic_relocation_decision

Health

Decision-support math for health tradeoffs — NEVER medical advice.

Health Treatment Tradeoff

Open →

Quality-adjusted life-years (QALY) for a treatment decision.

evaluate_health_qaly_decision

Business

Operator math for product, growth, and team decisions.

Pricing Optimization

Open →

What price maximizes profit given demand elasticity?

evaluate_pricing_decision

A/B Test Design

Open →

Required sample size to detect a lift at given power.

evaluate_ab_test_design

Product Launch Forecast

Open →

How fast will customers adopt your new product, month by month?

evaluate_product_launch_bass

Hire vs Skip

Open →

Does this final-round candidate pay back, factoring turnover risk?

evaluate_hire_vs_skip

Fundraising Round Comparison

Open →

Two raise scenarios → higher expected founder-retained value.

evaluate_fundraising_decision

Use it from your AI assistant

PathFi exposes the Library as a Model Context Protocol (MCP) server. Attach it to Claude, ChatGPT, Cursor, or any MCP-compatible client and your assistant can call the templates inline as part of a normal conversation.

# Endpoint

https://mcp.pathfi.ai

# Discovery

POST /tools/list

# Invocation

POST /tools/call

Anonymous calls are rate-limited per-IP. For higher limits, request an API key: hello@pathfi.ai. Setup details on the MCP server docs page.

Or just chat

Describe your decision in plain English. PathFi recognizes which template fits, asks for any missing inputs, and runs the math inline — no template-picker required.

Start a Decision