> ## Documentation Index
> Fetch the complete documentation index at: https://docs.iron.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> What changed in each API version, newest first. See API Versions for how X-API-Version negotiation works.

Each dated version is a frozen contract: once cut, its response and request shapes never change under you. This page lists what changed relative to the version before it. Entries are newest first.

<Note>
  This is the human-readable version. `GET /spec/versions` lists the supported versions machine-readably, and each version's full shape is at `/spec/<date>`. See [API Versions](/versioning) for the header itself.
</Note>

## 2026-07-01

**Adds the FedNow deposit rail.**

|           |                                                                                                                                                                                                                                      |
| --------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Affects   | Response                                                                                                                                                                                                                             |
| Kind      | Added (union variant)                                                                                                                                                                                                                |
| Endpoints | Any response containing an `Autoramp` object: `POST /autoramps`, `GET /autoramps`, `GET /autoramps/{autoramp_id}`, `PATCH /autoramps/{autoramp_id}`, `GET /autoramps/{external_id}/external`, `POST /autoramps/{autoramp_id}/quotes` |

The `deposit_rails` array can now include a `FedNow` member, for autoramps whose deposit account supports FedNow. This is additive to the `DepositRail` union: every existing member (`Iban`, `AchWire`, `Swift`, and the rest) is unchanged.

<Warning>
  If your integration matches on `deposit_rails` with an exhaustive switch and no default case, add a `FedNow` branch before sending `X-API-Version: 2026-07-01`. Callers on `2025-03-13` never see this variant, so there is no rush to migrate.
</Warning>

## 2025-03-13

Initial version. Served when no `X-API-Version` header is sent.