---
title: "STET PSD2 API — Changelog"
canonical: "https://openfinanceguide.com/en/stet/1.6.3/changelog"
edition: "STET PSD2 API 1.6.3.1"
pdf: "https://openfinanceguide.com/docs/stet/1.6.3/pdf/api-dsp2-stet-v1.6.3.1-changelog.pdf"
pdf_pages: "1"
language: "en"
normative: "The normative text is the English PDF published by STET. This Markdown reproduces it for reading; where they differ, the PDF prevails."
license: "CC BY 3.0 FR (https://creativecommons.org/licenses/by/3.0/fr/), STET. Converted to Markdown by Open Finance Guide."
---

# STET PSD2 API — Changelog

[p. 1](https://openfinanceguide.com/docs/stet/1.6.3/pdf/api-dsp2-stet-v1.6.3.1-changelog.pdf#page=1)

![STET specification diagram, STET PSD2 API — Changelog, PDF page 1](https://openfinanceguide.com/stet-asset/1.6.3/99-changelog/api-dsp2-stet-v1.6.3.1-changelog.pdf-0001-00.png)

> Table of the change requests of the version, by severity, category, number, summary and source. Major, General: 408, implementation of the JSON Web Signature Profile (OBE). Minor: AISP 521, remove useless parameters when retrieving transaction details (Budget Insight); General 508, enforce the authorization endpoint by a signature mechanism (LCL), 524, remove non-ASCII characters from the Swagger file (BNPP), 526, add an idempotency header (STET); PISP 496, add an investigation status for a payment request (LBP), 522, add a reason code for an amount over the allowed maximum, and 523, add a reason for insufficient funds (both TFH).

_Diagram from the official STET specification. Its text alternative is written by Open Finance Guide and is not normative._ [Source PDF, p. 1](https://openfinanceguide.com/docs/stet/1.6.3/pdf/api-dsp2-stet-v1.6.3.1-changelog.pdf#page=1)