# Add Time to ISO Dates

> Add Time to ISO Dates 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).

Adds a specified amount of time (in a given unit) to an ISO 8601 date or timestamp and returns the shifted ISO timestamp

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/date-add
- 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/add-time-to-iso-dates-d359b11b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KMymfeIxg3lf7UqV2YQvo

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 add-time-to-iso-dates-d359b11b -d '<json body>'
```

Example prompt: Add 30 days to 2026-08-04T09:00:00Z so I can set the SLA deadline for this new support ticket.

## When to prefer this

Choose this endpoint when you need deterministic, serverless date arithmetic without shipping a timezone library or calendar API dependency. Ideal for agents computing deadlines, SLA offsets, reminders, trial expiries, or any scenario requiring a future or past timestamp from a known anchor date and a fixed integer offset. Costs only $0.001 USDC per call via x402 on Base, with no API key or subscription required.

## Known failure modes

- Invalid or malformed ISO 8601 date string returns a structured validation error (not billed)
- Integer n out of allowed range returns a structured validation error (not billed)
- Unsupported or missing unit may return a validation error
- Network timeout or service unavailability returns an HTTP error with no charge

## How this service works

Add time to an ISO date. Call for deadlines, reminders, and SLA offsets without timezone libraries. Returns the shifted ISO timestamp (local pure parse; no calendar API). $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.

## Output

A JSON object containing the shifted ISO 8601 timestamp resulting from adding the specified integer amount of the given time unit to the input date. No timezone conversion is performed — the output is a local pure parse of the computed datetime.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "n": {
   "type": "integer",
   "description": "Integer input (see tool summary for allowed range)."
  },
  "date": {
   "type": "string",
   "format": "date-time",
   "description": "ISO-8601 date or timestamp (e.g. 2026-08-04 or 2026-08-04T12:00:00Z)."
  },
  "unit": {
   "description": "Optional unit input."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "date": "2026-08-04T12:00:00+00:00",
  "days": 0,
  "hours": 0,
  "schema": "delx/date-add/v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/add-time-to-iso-dates-d359b11b/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)