# Canadian Tax & Business Days Calculator

> Canadian Tax & Business Days Calculator is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).

Calculates the number of business days between two dates for a specified Canadian province or territory, excluding weekends and provincial statutory holidays with observed-day adjustments, and lists all holidays skipped.

## Facts

- Endpoint: GET https://onchaincheck.dev/business-days?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/canadian-tax-business-days-calculator-2d1d95e6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Sf-G4-8XOBx6V3OmTB9fm

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability canadian-tax-business-days-calculator-2d1d95e6
```

Example prompt: How many business days are there in Ontario between December 1, 2026 and January 1, 2027, excluding weekends and Ontario's statutory holidays?

## When to prefer this

Use this endpoint when you need an authoritative count of Canadian business days for a specific province or territory, including correct statutory holiday logic with observed-day adjustments. It is the right choice for legal deadline calculations, contract timelines, payroll windows, or any scheduling task that must respect Canadian provincial holiday rules. Prefer it over generic business-day calculators that don't model Canada's province-specific holiday variations or observed-day rules.

## Known failure modes

- Invalid date format (not YYYY-MM-DD) returns a validation error
- Missing required query parameters (province, from, to) returns a 400-level error
- Unsupported province code returns a validation error
- Date range where from is after to may return zero or an error
- Payment not included or insufficient results in a 402 Payment Required response

## How this service works

Number of business days between two dates in a Canadian province or territory, excluding weekends and that province's statutory holidays (with weekend holidays moved to their observed weekday). Counts from the start date up to but not including the end date, and lists the holidays skipped.

## Output

A JSON object containing the province code, the from and to dates, the total number of business days in the range (start date inclusive, end date exclusive), and a list of statutory holidays skipped — each with the holiday name, canonical date, and observed date (accounting for weekend shifts to Monday or Friday).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "province",
      "from",
      "to"
     ],
     "properties": {
      "to": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
       "description": "Day after the last day counted, YYYY-MM-DD"
      },
      "from": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
       "description": "First day counted, YYYY-MM-DD"
      },
      "province": {
       "enum": [
        "AB",
        "BC",
        "MB",
        "NB",
        "NL",
        "NS",
        "NT",
        "NU",
        "ON",
        "PE",
        "QC",
        "SK",
        "YT"
       ],
       "type": "string",
       "description": "Two-letter Canadian province or territory code"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "to": "2027-01-01",
  "from": "2026-12-01",
  "province": "ON",
  "businessDays": 21,
  "holidaysSkipped": [
   {
    "date": "2026-12-25",
    "name": "Christmas Day",
    "observed": "2026-12-25"
   },
   {
    "date": "2026-12-26",
    "name": "Boxing Day",
    "observed": "2026-12-28"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/canadian-tax-business-days-calculator-2d1d95e6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from onchaincheck.dev](https://www.zero.xyz/host/onchaincheck.dev/llms.txt)