Unix timestamp <-> ISO API

Converts between Unix epoch timestamps (seconds or milliseconds) and ISO-8601 datetimes in both directions, returning both unit forms and the weekday. Answers 'What is this ISO time as a Unix timestamp?', 'Convert epoch 1780531200 to a date.'.

Price$0.02per request

MethodPOST

Route/v1/datetime/unix-convert

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

datetimeunixepochtimestampiso-8601convertmillisecondsposix

API URLhttps://x402.hexl.dev/v1/datetime/unix-convert

Integration docs

Example request

{
  "op": "to-unix",
  "datetime": "2026-06-04T00:00:00Z"
}

Example response

{
  "op": "to-unix",
  "datetime": "2026-06-04T00:00:00.000Z",
  "unixSeconds": 1780531200,
  "unixMillis": 1780531200000,
  "unit": "s",
  "timestamp": 1780531200,
  "interpretation": "2026-06-04T00:00:00.000Z = 1780531200 s since the Unix epoch."
}

Input schema

{
  "type": "object",
  "required": [
    "op"
  ],
  "properties": {
    "op": {
      "type": "string",
      "enum": [
        "to-unix",
        "from-unix"
      ],
      "examples": [
        "to-unix"
      ]
    },
    "datetime": {
      "type": "string",
      "examples": [
        "2026-06-04T00:00:00Z"
      ]
    },
    "timestamp": {
      "type": "number",
      "examples": [
        1780531200
      ]
    },
    "unit": {
      "type": "string",
      "enum": [
        "s",
        "ms"
      ],
      "examples": [
        "s"
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}