Free Datetime, Timestamp and Timezone APIs

Datetime with an optional UTC offset

Without an offset, /datetime returns the current datetime in UTC. Add a four-digit offset to request another UTC offset.

curl https://aisenseapi.com/services/v1/datetime/+0200

{ "datetime": "2026-08-16T11:44:35+02:00" }

Use four digits with an optional sign. Valid examples are +0200, -0530 and 0100. An hour-only value such as 1 does not match the route.

Unix timestamp and microtimestamp

Timestamp

GET/timestamp

{ "timestamp": 1786873261 }

Whole seconds since the Unix epoch.

Microtimestamp

GET/microtimestamp

{ "microtimestamp": 1786873474.745043 }

Unix time with fractional seconds.

Timezone list and offset filter

/timezones returns IANA timezone names and their current offsets. Add a four-digit offset to filter the list.

curl https://aisenseapi.com/services/v1/timezones/+0200

{
  "timezones": [
    { "timezone": "Africa/Blantyre", "offset": "+0200" },
    { "timezone": "Europe/Oslo", "offset": "+0200" }
  ]
}

The timezones value is an array of objects. It is not an array of strings. Offsets can change with daylight-saving rules, so read the returned value instead of storing a permanent assumption.

Swatch Internet Time

This endpoint divides the day into 1000 beats based on Biel Mean Time.

curl https://aisenseapi.com/services/v1/swatchinternettime

{ "beat": "@444", "date": "2026-08-16" }

beat is a string that begins with @.

Convert between time formats

POST /timestamp_convert takes one value - unix seconds, unix milliseconds (13 digits and up, detected automatically), ISO 8601, RFC 2822 or "now" - and returns every representation, with an optional four-digit offset for the datetime output. Bad input returns HTTP 400.

curl -X POST https://aisenseapi.com/services/v1/timestamp_convert 
  -H "Content-Type: application/json" -d '{"data": "1700000000123", "offset": "+0100"}'

{ "detected": "unix_ms", "timestamp": 1700000000,
  "datetime": "2023-11-14T23:13:20+01:00", "utc_datetime": "2023-11-14T22:13:20+00:00" }

Common uses

Workflow timestamps

Add a shared server-side timestamp to an automation result.

Timezone selection

Build a list of zones that currently share a given UTC offset.

Scheduling input

Convert a user-selected offset into an ISO 8601 value.

Testing

Fetch a current value when test code needs time from an external source.

Response and error handling

The response key matches the endpoint name. Errors return {"error": "..."} with a real HTTP status - 400 for bad input, 404 for unknown paths and ids. The service-wide limit is 5000 requests per IP per 24 hours.

Time APIs