---
title: "Returns version information."
method: GET
path: "/api/version"
---

# Returns version information.

`GET /api/version`

## Response `200`

Returns version information.

- object
  - `versions` object
    - `author_tools_api` string — Author Tools API version
    - `xml2rfc` string — xml2rfc version
    - `kramdown-rfc` string — kramdown-rfc version
    - `mmark` string — mmark version
    - `id2xml` string — id2xml version
    - `weasyprint` string — weasyprint version
    - `idnits` string — idnits version
    - `iddiff` string — iddiff version
    - `aasvg` string — aasvg version
    - `bap` string — bap version
    - `svgcheck` string — svgcheck version
    - `rfcdiff` string — rfcdiff version
    - `rst2rfcxml` string — rst2rfcxml version

## Changes

- **2025-05-26** `9f2fe2360bd6` — 1 warning
  - removed the optional property `versions/idnits3` from the response with the `200` status
- **2025-02-19** `6ddd6798af5d` — 1 info
  - added the optional property `versions/rst2rfcxml` to the response with the `200` status
- **2024-02-21** `bba745eb0fcd` — 1 info
  - added the optional property `versions/idnits3` to the response with the `200` status
- **2024-01-10** `dce7c0aec3da` — 2 warning
  - removed the optional property `versions/tex2svg` from the response with the `200` status
  - removed the optional property `versions/utftex` from the response with the `200` status
- **2023-08-14** `5368b636fa79` — 2 info
  - added the optional property `versions/tex2svg` to the response with the `200` status
  - added the optional property `versions/utftex` to the response with the `200` status

[Full history](https://skmtc.dev/ietf-tools/apis/ietf-author-tools-api/changes/api/version/get.md)

---

[API](https://skmtc.dev/ietf-tools/apis/ietf-author-tools-api.md) · [All operations](https://skmtc.dev/ietf-tools/apis/ietf-author-tools-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ietf-tools/ietf-author-tools-api/revisions/8db1416c9cdd/schema)