FastX402 ISO Duration Converter

x402

FastX402 ISO Duration Converter is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-27).

Converts an ISO 8601 duration string or raw seconds into a structured object with ISO, human-readable, and seconds representations

Price / call$0.001

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StatusUnknown

How this service works

200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.

Output

Returns a JSON object with three fields: 'iso' (the canonical ISO 8601 duration string), 'human' (a plain-English description like '1 day, 2 hours, 30 minutes'), and 'seconds' (the total integer count of seconds). All three representations are always returned regardless of which format was provided as input.

Example use cases

Parsing API response durations

“I'm getting durations back from an API in ISO 8601 format like P2DT4H15M — can you convert that to plain English and give me the total seconds so I can display it to users?”

Normalizing seconds to ISO format

“I have a duration of 5400 seconds — can you convert that to the ISO 8601 format and also show me the human-readable version like '1 hour, 30 minutes'?”

Displaying event length in a calendar app

“The event duration is PT45M — what does that look like as a human-readable string, and what's the equivalent in seconds?”

Technical details

Endpoint

GEThttps://fastx402.tools/iso-duration?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need to convert between ISO 8601 duration strings and human-readable or seconds formats without any heavy date-math library dependency. It is ideal for display formatting, API response normalization, and duration serialization. At $0.001 per call with no API key required, it is well-suited for lightweight, pay-as-you-go agent workflows that occasionally need duration parsing.

Side effects

Invalid or unparseable duration string returns an error response
Missing required 'value' query parameter results in a 400-level error
Extremely large durations with year/month components may have ambiguous seconds conversion due to variable month/year lengths
Malformed ISO strings like 'P1D2H' (missing T separator) will likely fail to parse

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "iso": "P1DT2H30M",
    "human": "1 day, 2 hours, 30 minutes",
    "seconds": 95400
  }
}

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