# Time Zone Converter API

> For the complete documentation index, see [llms.txt](/llms.txt).

Convert a local date/time between IANA time zones with DST-aware offsets, to one or more targets.

Use this endpoint to add the tool to your app, site, workflow, or agent without rebuilding formulas, validation, examples, and docs.

- Slug: `time-zone-converter`
- Category: `time-date`
- Version: `2026-04-22`
- Credits per successful call: 1
- Starts on: free
- Max payload: 65536 bytes
- Privacy mode: `hash_only`
- Available on: free, starter, pro, business, scale
- Browser tool: https://miniwebtool.com/time-zone-converter/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/time-zone-converter/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `datetime_str` | `str` | yes | Local time, e.g. 2026-07-20T14:30:00 |
| `from_tz` | `str` | no | IANA zone name, e.g. America/New_York |
| `to_tz` | `str` | no | Comma-separated IANA zone name(s) |

## Example request

```json
{
  "datetime_str": "2026-07-20T14:30:00",
  "from_tz": "UTC",
  "to_tz": "America/New_York,Asia/Tokyo"
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/time-zone-converter/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"datetime_str":"2026-07-20T14:30:00","from_tz":"UTC","to_tz":"America/New_York,Asia/Tokyo"}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "time-zone-converter",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "result": {}
}
```

## Errors

Errors are RFC 7807 `application/problem+json`. Branch on `code`, not `title`.

## MCP

Agents can discover and call this tool through `https://api.miniwebtool.com/mcp` or `https://api.miniwebtool.com/v1/mcp` using MCP `tools/list` and `tools/call`.

## Frequently asked

### What does the Time Zone Converter API do?

Convert a local date/time between IANA time zones with DST-aware offsets, to one or more targets. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

### How much does one call cost?

1 credit per successful call. Failed calls do not bill.

### What parameters are required?

Required fields: datetime_str. Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

Yes. Same input, same output. Tool version: 2026-04-22.