Split expenses in cents with equal/weighted shares and payer advances. No account or payments.
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Calculate balances and reimbursement suggestions for 2–30 participants across 1–100 expenses with different payers and equal or weighted shares. Uses integer cents, deterministic largest-remainder allocation, and offsets debts. Supported single currencies: EUR, USD, GBP, CHF, CAD; no conversion. The tool is stateless and cannot access accounts, fetch data, store results or transfer money. Use aliases when possible.
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
claude mcp add --transport http exact-split https://partly-exact-split.paul-brousses.workers.dev/mcp
Calculate balances and reimbursement suggestions for 2–30 participants across 1–100 expenses with different payers and equal or weighted shares. Uses integer cents, deterministic largest-remainder allocation, and offsets debts. Supported single currencies: EUR, USD, GBP, CHF, CAD; no conversion. The tool is stateless and cannot access accounts, fetch data, store results or transfer money. Use aliases when possible.
| Argument | Type | Description |
|---|---|---|
| currency* | string | |
| expenses* | array | |
| participants* | array |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"currency",
"participants",
"expenses"
],
"properties": {
"currency": {
"enum": [
"EUR",
"USD",
"GBP",
"CHF",
"CAD"
],
"type": "string"
},
"expenses": {
"type": "array",
"items": {
"type": "object",
"required": [
"amountCents",
"payerId",
"shares"
],
"properties": {
"shares": {
"type": "object",
"description": "Participant IDs mapped to positive whole-number weights. Omit a participant to exclude them; all 1 means equal shares.",
"propertyNames": {
"type": "string",
"pattern": "^[a-zA-Z][a-zA-Z0-9_-]{0,39}$"
},
"additionalProperties": {
"type": "integer",
"maximum": 10000,
"minimum": 1
}
},
"payerId": {
"type": "string",
"pattern": "^[a-zA-Z][a-zA-Z0-9_-]{0,39}$"
},
"amountCents": {
"type": "integer",
"maximum": 100000000,
"minimum": 1,
"description": "Positive integer minor units: 18.34 becomes 1834. Never pass floating currency values."
}
},
"additionalProperties": false
},
"maxItems": 100,
"minItems": 1
},
"participants": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"name"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z][a-zA-Z0-9_-]{0,39}$"
},
"name": {
"type": "string",
"maxLength": 60,
"minLength": 1,
"description": "Display label or alias. Do not include bank, email or other sensitive identifiers."
}
},
"additionalProperties": false
},
"maxItems": 30,
"minItems": 2
}
},
"additionalProperties": false
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Oct 30, 2026.