plugin.json

{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "wealthsim-calculators",
  "version": "1.0.0",
  "description": "Free, read-only money calculators from WealthSim: S&P 500 history, compound interest, retirement drawdown, US take-home pay, I bonds, and Spain's unemployment benefit and net salary. Every answer cites its data source and links to the full calculator.",
  "author": {
    "name": "Oscar Gallego Ruiz",
    "url": "https://www.wealthsim.app/author/oscar-gallego-ruiz"
  },
  "homepage": "https://www.wealthsim.app/mcp",
  "keywords": [
    "finance",
    "calculator",
    "s&p 500",
    "compound interest",
    "retirement",
    "taxes"
  ],
  "extensions": {
    "com.openai": {
      "interface": {
        "displayName": "WealthSim Calculators",
        "shortDescription": "S&P 500 and money calculators",
        "longDescription": "WealthSim turns money questions into numbers you can check. Ask how $10,000 in the S&P 500 would have grown since a given year, project savings with compound interest and fees, see how long retirement savings could last against real market history, estimate 2026 US take-home pay by state, value a Series I savings bond, or, in Spain, estimate unemployment benefit (paro) and net salary. Each answer comes from the same engine as the calculators on wealthsim.app, names its official or published data source and links to the full calculator. The tools are read-only: they need no account, store none of your inputs and never place trades or file anything. Results are educational estimates, not financial, tax or legal advice.",
        "developerName": "WealthSim",
        "category": "Finance",
        "capabilities": [
          "Replay S&P 500 returns with dividends for any years since 1928",
          "Project compound interest with monthly contributions and fees",
          "Test how long retirement savings last against real market history",
          "Estimate 2026 US take-home pay by state",
          "Value a US Series I savings bond",
          "Estimate unemployment benefit and net salary in Spain"
        ],
        "websiteURL": "https://www.wealthsim.app",
        "supportURL": "https://www.wealthsim.app/contact",
        "privacyPolicyURL": "https://www.wealthsim.app/privacy",
        "termsOfServiceURL": "https://www.wealthsim.app/terms",
        "defaultPrompt": [
          "What would $10,000 invested in the S&P 500 in 2000 be worth today with dividends?",
          "How long would $1,000,000 last if I withdraw $40,000 a year in retirement?",
          "What is my take-home pay on a $90,000 salary in Texas?"
        ],
        "brandColor": "#875A08",
        "brandColorDark": "#E7A93B",
        "composerIcon": "./assets/logo.png",
        "logo": "./assets/logo.png"
      },
      "review": {
        "test_cases": {
          "positive": [
            {
              "description": "S&P 500 replay with a monthly contribution",
              "prompt": "What would $10,000 invested in the S&P 500 in 2000, plus $500 a month, be worth by the end of 2020?",
              "tools_triggered": "sp500_historical_replay",
              "expected_behavior": "Calls sp500_historical_replay with amount 10000, monthly 500, startYear 2000, endYear 2020. Shows the result card with the final value with dividends reinvested, the yearly chart, the data source and a link to the calculator."
            },
            {
              "description": "Compound interest with a fee",
              "prompt": "Project $200 a month for 20 years at a 7% annual return with a 0.2% yearly fee.",
              "tools_triggered": "compound_interest",
              "expected_behavior": "Calls compound_interest with the monthly contribution, years, return and fee. Shows the result card with the final balance, the total contributed, interest and fees, and a link to the calculator."
            },
            {
              "description": "How long retirement money lasts",
              "prompt": "I have $1,000,000 and will withdraw $40,000 a year with 60% in stocks. How long does it last over 30 years?",
              "tools_triggered": "retirement_how_long_money_lasts",
              "expected_behavior": "Calls retirement_how_long_money_lasts and answers with the steady-return estimate, the share of historical start years in which the money lasted, the data source and a link. States it is a historical simulation, not a forecast."
            },
            {
              "description": "US take-home pay by state",
              "prompt": "What is the take-home pay on an $80,000 salary in Texas, filing single, paid biweekly?",
              "tools_triggered": "take_home_pay_us",
              "expected_behavior": "Calls take_home_pay_us with salary 80000, state TX, filing single, frequency biweekly. Answers with net pay per year, month and paycheck and the federal, state, Social Security and Medicare breakdown, citing the IRS and state sources."
            },
            {
              "description": "Series I savings bond value",
              "prompt": "What is a $1,000 I bond bought in January 2020 worth now?",
              "tools_triggered": "i_bond_value",
              "expected_behavior": "Calls i_bond_value with issueYear 2020, issueMonth 1, amount 1000. Answers with the current value, interest earned, whether it can be cashed and any penalty, citing TreasuryDirect."
            }
          ],
          "negative": [
            {
              "description": "Personal stock picks are investment advice, which the tools do not give",
              "prompt": "Which stock should I buy this week?"
            },
            {
              "description": "The tools replay history or use the user's own assumption; they do not predict markets",
              "prompt": "What will the S&P 500 return next year?"
            },
            {
              "description": "The tools only calculate; they never file, submit or store anything",
              "prompt": "Fill in my tax return and file it for me."
            }
          ]
        }
      },
      "publication": {
        "release_notes": "First release: seven read-only calculators (S&P 500 historical replay, compound interest, retirement drawdown, US take-home pay 2026, I bond value, Spain unemployment benefit and Spain net salary 2026), with a result card for the S&P 500 and compound interest tools."
      },
      "apps": "./.app.json"
    }
  }
}