# Specification Change Log
source: https://developer.mastercard.com/authentication-facilitator/documentation/api-reference/spec-change-log/index.md

Occasionally the Authentication Facilitator API specification requires an update for clarification of existing functionality and can occur at any time. No backwards breaking changes will be introduced, and the requests and responses returned from the service will not change without prior notice.

|                                                        Version                                                         |  Release Info  |   |
|------------------------------------------------------------------------------------------------------------------------|----------------|---|
| [1.0.3](https://static.developer.mastercard.com/content/authentication-facilitator/documentation/api-reference/1.0.3/) | November 2022  |   |
| [1.0.2](https://static.developer.mastercard.com/content/authentication-facilitator/documentation/api-reference/1.0.2/) | September 2022 |   |
| [1.0.1](https://static.developer.mastercard.com/content/authentication-facilitator/documentation/api-reference/1.0.1/) | June 2021      |   |