amortize

endpoint

https://amortize.gumballtools.com/api/mcp

protocol

http-sse ·2025-06-18

authentication

none observed

public key

none — nobody has proven they own this listing · is it yours? claim it

karma

0 · newcomer

Is amortize live?

Yes — it answered the hub's last check (checked 54m ago). It answered 99% of checks over the last 30 days.

Is amortize free to use?

Yes — the hub reached it with no key and no payment.

What tools does amortize have?

1 tool: amortize.

Is amortize safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

• amortize reads unknown 11h ago

  Builds the full row-by-row amortization schedule for a loan — interest, principal, PMI, and running balance for every payment — instead of just the monthly payment amount. Use this whenever a row-by-row schedule matters: "what is my balance after payment 47", "what does an extra $200/month do to my payoff date", "when does PMI drop off", or "give me the whole amortization table". Do not do this arithmetic by hand or in your head. Two things go wrong reliably when a model tries: 1. THE LAST ROW. The textbook payment formula only amortizes to exactly zero in infinite precision. Rounded to cents and carried over up to a few hundred rows, a hand-rolled schedule drifts and ends with a balance of a few cents to a few dollars instead of zero — exactly the row a person checks against their real statement. This tool recomputes the final row as "remaining balance + that row's interest" so it always ends at zero, and reports the delta. 2. COMPOUNDING CONVENTION. Fixed mortgages compound monthly (rate/12). HELOCs, most auto loans, and most private student loans accrue interest DAILY on the actual number of days between payments, which is a genuinely different schedule, not a rounding variant. Guessing the wrong one silently produces a plausible but wrong table. Input: `principal`, `annualRatePercent` (e.g. 6.5), `termMonths` (integer), and `compounding` ("monthly" or "daily") are required. For `compounding: "daily"`, supply EITHER `startDate` (YYYY-MM-DD — the tool derives real day counts and leap years from the calendar itself) OR `dayCountBasis` ("30/360" | "actual/365" | "actual/actual") for a hypothetical loan with no dates — never both are needed, and supplying neither is refused rather than guessed. Optional: `paymentFrequency` ("monthly" default | "biweekly", which requires daily compounding — pass `paymentOverride` if the actual billed payment differs from the textbook one, e.g. a HELOC's quoted minimum; `extraPrincipal` as `{type:"oneOff",amount,atPaymentNumber}` or `{type:"recurring",amount,startingPaymentNumber?}`; `pmi` as `{monthlyAmount,originalValue,cancelAtPercent?}` (78 or 80, default 78) to model PMI dropping off. Refuses rather than guesses: a payment that does not exceed the first period's interest (negative amortization) is a named error with the minimum amortizing payment attached, not a schedule that never ends. An unparseable or impossible date is refused, not reinterpreted. Returns the full schedule, total interest and PMI paid, the payoff date or period, the final payment amount and how it differs from the standard one, and — when extra principal was given — the same schedule without it, so the periods and interest saved are explicit. A `disclaimer` field travels with every response: this is a planning estimate, not a lender payoff quote, and PMI cancellation here uses your actual balance, which a servicer is legally permitted to compute off the original schedule instead. Relay the warnings, not just the numbers.

  mcp-tool

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  {
    "type": "object",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "required": [
      "principal",
      "annualRatePercent",
      "termMonths",
      "compounding"
    ],
    "properties": {
      "pmi": {
        "type": "object",
        "required": [
          "monthlyAmount",
          "originalValue"
        ],
        "properties": {
          "monthlyAmount": {
            "type": "number"
          },
          "originalValue": {
            "type": "number"
          },
          "cancelAtPercent": {
            "anyOf": [
              {
                "type": "number",
                "const": 78
              },
              {
                "type": "number",
                "const": 80
              }
            ]
          }
        },
        "description": "Models PMI dropping off at 78% (automatic, default) or 80% (requestable) of originalValue."
      },
      "principal": {
        "type": "number",
        "description": "The loan amount, > 0."
      },
      "startDate": {
        "type": "string",
        "description": "YYYY-MM-DD. For daily compounding, supplying this lets the tool read real day counts and leap years off the calendar."
      },
      "termMonths": {
        "type": "integer",
        "maximum": 9007199254740991,
        "minimum": -9007199254740991,
        "description": "The original term in whole months, e.g. 360 for 30 years."
      },
      "compounding": {
        "enum": [
          "monthly",
          "daily"
        ],
        "type": "string",
        "description": "\"monthly\": rate/12 per period, the fixed-mortgage norm. \"daily\": actual per-diem accrual, the HELOC/auto-loan/student-loan convention — requires startDate or dayCountBasis."
      },
      "dayCountBasis": {
        "enum": [
          "30/360",
          "actual/365",
          "actual/actual"
        ],
        "type": "string",
        "description": "Required for daily compounding ONLY when there is no startDate (a hypothetical loan)."
      },
      "extraPrincipal": {
        "anyOf": [
          {
            "type": "object",
            "required": [
              "type",
              "amount",
              "atPaymentNumber"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "oneOff"
              },
              "amount": {
                "type": "number"
              },
              "atPaymentNumber": {
                "type": "integer",
                "maximum": 9007199254740991,
                "minimum": -9007199254740991
              }
            }
          },
          {
            "type": "object",
            "required": [
              "type",
              "amount"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "recurring"
              },
              "amount": {
                "type": "number"
              },
              "startingPaymentNumber": {
                "type": "integer",
                "maximum": 9007199254740991,
                "minimum": -9007199254740991
              }
            }
          }
        ],
        "description": "A one-off extra payment at a given payment number, or a recurring extra payment from a given payment number onward."
      },
      "paymentOverride": {
        "type": "number",
        "description": "The actual per-period payment, if different from the textbook one — e.g. a HELOC minimum payment."
      },
      "paymentFrequency": {
        "enum": [
          "monthly",
          "biweekly"
        ],
        "type": "string",
        "description": "\"biweekly\" pays half the monthly payment every 14 days and requires compounding \"daily\"."
      },
      "annualRatePercent": {
        "type": "number",
        "description": "The annual interest rate as a percent, e.g. 6.5 for 6.5%."
      }
    }
  }

  arguments 135 lines copy

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