Sum Money

money.sum

ProductionBounded custom (Class B)Deterministicstrictinstantv1.0.0

No network

Overview

Sum bounded monetary amounts only when every currency code matches. The skill uses exact decimal arithmetic, reports the resolved policy, rejects unknown properties, and never fetches a rate or infers accounting policy.

Money arithmetic needs explicit currency, scale, tolerance, and rounding semantics; an LLM cannot guarantee those constraints or reproduce residuals.

Reliability

STRICT and stateless. AMOUNT_INVALID means a malformed or over-limit decimal; fix it. CURRENCY_UNKNOWN means the code is outside the documented allowlist; send a supported code. CURRENCY_MISMATCH is triggered when one sum contains different currency codes; retry only after converting first or splitting the rows by currency. TOLERANCE_INVALID means a negative or unsupported tolerance; correct its type and value. ROUNDING_INVALID means mode or scale is unsupported; choose a documented value. ITEM_LIMIT_EXCEEDED means more than 10,000 rows; split them.

Context footprint

One call returns normalized money strings and the resolved policy. A successful call costs 1 execution credit.

When to use it

When you add a homogeneous list of amounts sharing one ISO currency code with no FX conversion.

When rows mix currency codes; convert first, then sum, or split the batch by currency.

Scope

Note

Sum bounded monetary amounts only when every currency code matches

Non-goals

Does not fetch FX rates or convert currencies
Does not infer materiality, accounting policy, cash rounding, or locale
Does not accept unbounded lists or binary floating-point semantics

Properties

IdempotentRetry safeStreaming supportedFile input supportedRequires external service

Capabilities

data-transformationmath

Cost & billing

Flat rate per invocation

MetercallsBillable onsuccessCost per call1 credit

File handling

Accepts file_refProduces file_refMax input64 KB

How we handle your data

Sensitive input, safe output

What this means

This skill may receive sensitive content, but it does not target sensitive data and returns only a structured non-sensitive result.

Squillify guarantees

Runs inside Squillify
This skill runs inside Squillify.
Payloads are not sent to an external service by this skill.
Squillify does not permanently store submitted payloads.
Telemetry records metadata only, not submitted content.
Submitted payloads are not used for training.
Submitted payloads are not reviewed by humans.
This skill does not target sensitive data.
The response does not contain submitted content.

Your responsibility

Squillify does not determine whether submitted content is sensitive. Your application is responsible for deciding what data it is allowed to submit. Your application is responsible for securing the response.

Read the Microskill Data Handling Policy

Input schema

Field	Type	Required	Description
amounts	array	Yes	Required 1 to 10,000 objects {amount, currency}; all currency codes must match and no FX conversion occurs.

Output schema

Field	Type	Required	Description
total	string	Yes	Exact homogeneous sum without rounding.
currency	string	Yes	The normalized common ISO 4217 code.
count	integer	Yes	Number of amounts summed.

API contract

POST /v1/execute

curl

curl -sS -X POST "$BASE/v1/execute" -H "Authorization: Bearer $KEY" -H 'Content-Type: application/json' -d '{"skillKey":"money.sum","input":{"amounts":[{"amount":"10.20","currency":"USD"},{"amount":"-2.10","currency":"USD"}]}}'

Integrations

TypeScript SDK

import { Squillify } from "@squillify/sdk";

const sq = new Squillify({ apiKey: process.env.SQUILLIFY_API_KEY });

const { output } = await sq.execute("money.sum", {"amounts":[{"amount":"10.20","currency":"USD"},{"amount":"-2.10","currency":"USD"},{"amount":"1.90","currency":"USD"}]});

Errors

Code	HTTP	Retryable	Description
VALIDATION_ERROR	400	No	The request payload failed schema validation.
UNAUTHORIZED	401	No	Missing or invalid API key.
SKILL_NOT_ACCESSIBLE	403	No	The API key is not granted access to this skill.
SKILL_NOT_AVAILABLE_FOR_PLAN	403	No	This skill is not included in your current plan.
PLAN_ELIGIBILITY_UNAVAILABLE	503	Yes	Plan eligibility could not be decided. Retry after backoff.
SKILL_NOT_FOUND	404	No	The requested skill or version does not exist.
TENANT_RATE_LIMITED	429	Yes	Request rate limit exceeded. Retry after backoff.
QUOTA_EXCEEDED	429	Yes	Plan quota exhausted. Retryable once the quota period resets.
EXECUTION_TIMEOUT	504	Yes	Execution exceeded the allowed time budget.
AMOUNT_INVALID	400	No	The request payload failed this skill's input validation.
CURRENCY_UNKNOWN	400	No	The request payload failed this skill's input validation.
CURRENCY_MISMATCH	400	No	The request payload failed this skill's input validation.
ITEM_LIMIT_EXCEEDED	429	No	A size, quota, rate, or time limit was exceeded.

Other limits

Limit	Value
Recommended inline bytes	32 KiB

Limitations

Does not fetch FX rates or convert currencies
Does not infer materiality, accounting policy, cash rounding, or locale
Does not accept unbounded lists or binary floating-point semantics
When rows mix currency codes; convert first, then sum, or split the batch by currency.
Do not use when tolerance, scale, or rounding policy is still undecided

How to call

POST /v1/execute (requires authentication)

Request bodyjson

{
  "skillKey": "money.sum",
  "input": {
    "amounts": [
      {
        "amount": "10.20",
        "currency": "USD"
      },
      {
        "amount": "-2.10",
        "currency": "USD"
      },
      {
        "amount": "1.90",
        "currency": "USD"
      }
    ]
  }
}

Examples

Sum three dollar amounts

Inputjson

{
  "amounts": [
    {
      "amount": "10.20",
      "currency": "USD"
    },
    {
      "amount": "-2.10",
      "currency": "USD"
    },
    {
      "amount": "1.90",
      "currency": "USD"
    }
  ]
}

Expected outputjson

{
  "currency": "USD",
  "count": 3,
  "total": "10"
}

Preserve exact dinar decimals