# SignalDesk AI – Date Quarter Lookup

> SignalDesk AI – Date Quarter Lookup is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Given a Gregorian date, returns the calendar quarter number, year, and the quarter's start and end dates.

## Facts

- Endpoint: POST https://x402-agent.kariguetoazul.workers.dev/api/date/quarter?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-date-quarter-lookup-7dc9518d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vZyqS-2XgmnGOdKddsj51

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 signaldesk-ai-date-quarter-lookup-7dc9518d -d '<json body>'
```

Example prompt: What quarter does October 15, 2026 fall in, and when does that quarter start and end?

## When to prefer this

Use this endpoint when you need a fast, cheap, deterministic lookup of which calendar quarter a date belongs to — especially inside automated pipelines or agent workflows that process many dates without wanting to compute quarter logic locally. At $0.001 USDC per call it is well-suited for high-volume batch enrichment or quick one-off date classification.

## Known failure modes

- Invalid date format (not YYYY-MM-DD) returns an error
- Missing 'date' field in request body causes a validation error
- Dates outside supported range may return unexpected results
- Payment failure (x402) if USDC micropayment is not provided correctly

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

A JSON object containing: the quarter number (1–4), the year, and the ISO date strings for the first and last day of the quarter that contains the input date.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "date": {
   "type": "string",
   "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
   "maxLength": 10,
   "minLength": 10,
   "description": "Gregorian date YYYY-MM-DD, interpreted in UTC."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "end": "2026-12-31",
  "year": 2026,
  "start": "2026-10-01",
  "quarter": 4
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-date-quarter-lookup-7dc9518d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)