# Market Calendar API – Is Banking Day

> Market Calendar API – Is Banking Day is a paid API for AI agents from market-calendar-api.onrender.com, paid per call via x402, $0.014/call, status unknown (last checked 2026-10-29).

Returns whether a given date is a banking/settlement day for TARGET2 (euro/SEPA), US Fedwire, or Switzerland (SIX), plus the reason and next valid banking day.

## Facts

- Endpoint: GET https://market-calendar-api.onrender.com/v1/is-banking-day?utm_source=zero.xyz
- Price: $0.014/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/market-calendar-api-is-banking-day-247b0457
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TO7DZhjXD_dWBhiqqDTlR

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 market-calendar-api-is-banking-day-247b0457
```

Example prompt: Is December 26, 2025 a banking settlement day for TARGET2 euro payments, and if not, what's the next valid banking day?

## When to prefer this

Use this endpoint when you need to verify whether a specific date is a valid payment settlement day for a particular financial zone (TARGET2/SEPA, US Fedwire, or Swiss SIX) before scheduling or routing a payment, or when you need to determine the next valid banking day for cut-off and scheduling logic. It is purpose-built for payment operations teams, treasury systems, and financial agents that need authoritative holiday-aware settlement calendar lookups per zone — not for general business-day calculations or stock market trading day checks.

## Known failure modes

- Missing required 'zone' parameter returns a 400 or validation error
- Invalid zone value (not TARGET2, US, or CH) returns an error
- Malformed date format (not YYYY-MM-DD) causes a parsing error
- Network/server unavailability on the Render.com host returns a 503
- No response for very far future dates if calendar data is not populated

## How this service works

Tells whether a date is a banking/settlement day for euro payments (TARGET2/SEPA), US Fedwire or Switzerland (SIX), with the reason and the next banking day.

## Output

The endpoint returns a JSON object indicating whether the queried date is a banking/settlement day for the specified zone (TARGET2, US, or CH), the reason (e.g. holiday name) if it is not a banking day, and the date of the next valid banking day in that zone.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "zone"
     ],
     "properties": {
      "date": {
       "type": "string",
       "description": "Date YYYY-MM-DD. Default: today."
      },
      "zone": {
       "type": "string",
       "description": "TARGET2, US or CH"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/market-calendar-api-is-banking-day-247b0457/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market-calendar-api.onrender.com](https://www.zero.xyz/host/market-calendar-api.onrender.com/llms.txt)