Unix timestamp converter API: epoch seconds to ISO date and back

$0.01 per call · failed calls are never charged · no account or subscription: pay per call with a card key or USDC

Convert a Unix timestamp (seconds or milliseconds, detected automatically) to ISO date and time, or an ISO date to a Unix timestamp. Without input, returns the current time in both forms. Use to read timestamps in logs and APIs.

When to use it

Run it free (25 free calls) Buy credits by card (from $1) Example result (JSON)

Try it with your own inputs

Unix seconds/milliseconds or an ISO date (default now)

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
valuestringUnix seconds/milliseconds or an ISO date (default now)

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/unix?value=1792281600"

Or one of your 25 free calls, no key:

curl "https://tools.funwords.eu/unix?value=1792281600&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "unix": 1792281600,
  "unixMs": 1792281600000,
  "iso": "2026-10-18T00:00:00.000Z"
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is unix, and the first 25 successful calls are free:

https://tools.funwords.eu/mcp

Questions

Seconds or milliseconds?

Either; it is detected automatically.

How do I pay?

Each successful call costs $0.01; failed calls are not charged. The first 25 calls are free. Then pay with card credits (from $1; the key goes in an Authorization header or, for clients that can only fetch a URL, as api_key= in the URL) or per call in USDC over x402 or MPP. No account is needed.

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