generated: '2026-07-21'
method: searched
source: https://docs.iron.xyz/api-access
versioning:
  scheme: header-date
  header: X-API-Version
  format: YYYY-MM-DD
  default: '2025-03-13'
  supported:
  - '2025-03-13'
  - '2026-07-01'
  docs: https://docs.iron.xyz/reference-sandbox/addresses/register-a-self-attested-wallet-address
  notes: Date-based API versions selected per-request via the X-API-Version header; omitting the header pins to
    the default version 2025-03-13.
status_page: https://status.iron.xyz
environments:
  sandbox: https://api.sandbox.iron.xyz/api
  production: https://api.iron.xyz/api
deprecation:
  policy_url: null
  sunset_header: false
  notes: No published deprecation policy or RFC 8594 Sunset header support found in the docs.
sla: null
deprecated_operations: []
lineage:
- date: '2021'
  event: Founded as Unstoppable Finance GmbH (Berlin); built the Ultimate self-custodial DeFi wallet.
- date: '2024'
  event: Rebranded to Iron (iron.xyz) - stablecoin banking / fiat-stablecoin infrastructure. unstoppable.fi and
    ultimate.app now redirect to iron.xyz.
- date: '2025'
  event: Iron acquired by MoonPay; docs and CLI are unified under MoonPay (docs at docs.iron.xyz, CLI mp).