# Delx Weekday Name

> Delx Weekday Name is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Returns the weekday name (e.g. Monday, Tuesday) for a given ISO 8601 date string

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/weekday-name
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-weekday-name-94f440cd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RR4pmsk-dMwlSW48uW_Iv

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 delx-weekday-name-94f440cd -d '<json body>'
```

Example prompt: What day of the week is 2025-09-22? I need the weekday name so I can label it on the calendar.

## When to prefer this

Choose this endpoint when your agent needs to resolve a weekday name from an ISO date without importing locale libraries or date-formatting dependencies. It is ideal for lightweight calendar labeling, scheduling display, or personalization tasks in agent pipelines where simplicity and zero-dependency lookups matter. At $0.001 USDC per call it is cost-effective for per-event labeling.

## Known failure modes

- Invalid or malformed ISO date string returns an error response
- Missing 'iso' field in request body causes a validation error
- Dates outside supported range may return an error
- Network timeout if the service is temporarily unavailable

## How this service works

Weekday name from ISO date. Call when you label agent calendars without locale libs. Returns weekday and ok for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

## Output

Returns a JSON object containing the weekday name (e.g. 'Monday') corresponding to the provided ISO date, along with an 'ok' status field confirming the lookup succeeded.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "iso": {
   "type": "string",
   "description": "Input field: iso."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "schema": "delx/util-weekday-name/v1",
  "weekday": "Thursday"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-weekday-name-94f440cd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)