# lilambd Calendars — Weekday Names Lookup

> lilambd Calendars — Weekday Names Lookup is a paid API for AI agents from api.lilambd.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-11-04).

Returns localized weekday names (e.g. Monday in Japanese, French, Arabic) from the Unicode CLDR dataset, with pagination support.

## Facts

- Endpoint: GET https://api.lilambd.com/calendars/weekday-names?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lilambd-calendars-weekday-names-lookup-5f3db390
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_B6FZ0hGix5Mpw3NJstOOH

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 lilambd-calendars-weekday-names-lookup-5f3db390
```

Example prompt: What are the weekday names in Japanese according to Unicode CLDR? Give me all seven days starting from Monday.

## When to prefer this

Choose this endpoint when you need authoritative, Unicode CLDR-sourced localized weekday names for a specific locale, especially for calendar UIs, scheduling tools, or i18n data pipelines. It is preferable to hardcoding translations or using general-purpose translation APIs because it draws directly from the CLDR standard used by browsers and operating systems worldwide.

## Known failure modes

- Unsupported or malformed locale code returns empty results or error
- Pagination offset beyond available records returns empty data array
- Missing required query parameters may return a 400 Bad Request
- Rate limiting or payment failure (x402) returns 402 Payment Required

## How this service works

A crossing for play, feeling, language, science and computation — creating states that do not have names yet.

## Output

Returns a paginated JSON array of weekday name objects, each containing the localized name string, locale code, a short day_key (e.g. 'mon'), and ISO weekday number (1=Monday). Also includes total count, limit, offset, and a Unicode CLDR version attribution string.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  },
  "additionalProperties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [
   {
    "name": "月曜日",
    "locale": "ja",
    "day_key": "mon",
    "iso_weekday": 1
   }
  ],
  "count": 1,
  "limit": 20,
  "offset": 0,
  "attribution": "Unicode CLDR 49 ..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lilambd-calendars-weekday-names-lookup-5f3db390/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.lilambd.com](https://www.zero.xyz/host/api.lilambd.com/llms.txt)