Official FME Flow API v4 documentation does not show the latest Openapi specification 3.01. On
FME 2026.1 the following OpenAPI specification is available:
"openapi": "3.0.1",
"info": {
"title": "FME Flow REST API V4",
"description": "FME Flow REST API V4 is our stable REST API.",
"contact": {
"name": "Safe Software Inc.",
"url": "https://www.safe.com/"
},
"version": "4"
},
"servers": [
{
"url": "https://***/fmeapiv4",
"description": "Generated server url"
}
],
But the public documentation shows version 3.0.1 alpha
https://docs.safe.com/fme/html/fmeapiv4/docs/schema/static.json
{
"operationsSorter": "alpha",
"tagsSorter": "alpha",
"docExpansion": "none",
"openapi": "3.0.0",
"info": {
"title": "FME Flow REST API V4",
"description": "FME Flow REST API V4 is our stable REST API.",
"contact": {
"name": "Safe Software Inc.",
"url": "https://www.safe.com/"
},
"version": "4"
},

