API Testing — What Makes LoadGen Unique

Visual flow editor, OpenAPI import, environments, auth profiles. LoadGen brings API testing to the EUC/VDI world. Login VSI, ControlUp, and NeoLoad don't offer this.

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API Testing › Flows

Mode: BasicOnline

API Flows

Create and manage API testing flows.

Impacted only

Flow Name	Nodes	Source	Last Run	Status
User Authentication Flow	12	Manual	2m ago	Passed
Order API Regression	8	OpenAPI	1h ago	Passed
Payment Gateway Smoke	6	Manual	4h ago	Failed
Inventory Sync Check	15	OpenAPI	12h ago	Passed
Session Token Refresh	4	Manual	1d ago	Passed

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28 Node Types Across 8 Categories

Flow

Start and End points for your workflows.

Request

Operation (OpenAPI), Raw HTTP, and Replay nodes.

Assert

Status, JSONPath, Schema, and Latency assertions.

Auth

Bearer, API Key, and OAuth2 authentication.

Control

If, Switch, Loop, Parallel, Join, Delay, Retry, and Error Handler.

Data

Set, Variable, CSV, and DB Lookup nodes.

Transform

Built-in and JavaScript transformation nodes.

Subflow

Call reusable flows within your workflows.

Import from OpenAPI — Version Management Built-In

Stay in sync with your API specifications automatically.

Import OpenAPI Source — No manual URL entry required.

Version Management — Approve new versions with a built-in diff viewer.

Automatic Migration — Flows stay in sync when the source is updated.

Impact Analysis — See which flows are impacted by API changes.

API Testing › Sources

Mode: BasicOnline

API Sources

OpenAPI specification sources

Name	Latest	Status	Flows
Users API	v2.5.0	Healthy	4
Orders API	v4.1.2	Pending	3
Payments API	v1.3.0	Healthy	2
Inventory API	v3.0.0	Drift	1

Showing 4 of 6 sourceslast sync · 2m ago

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Run with Debug — Resume, Step, Abort

Catch errors before you run. Debug failures in place with full visibility.

Timeline — Node execution with HTTP status and duration bars.

Events — Detailed event log for every step of the execution.

Artifacts — Captured outputs and response data.

Variables — Real-time view of the runtime state and variables.

Debug Controls — Resume, Step, and Abort execution as needed.

API Testing › Runs › Debug

Mode: BasicOnline

Run #847 · User Auth Flow

9 nodes · Debug session

Paused

·Run #847·6/9 passed

Timeline

STARTStart1

AUTHBearer Auth2

REQGET /api/users3

ASRTStatus = 2004

XFRMExtract user.id5

CTRLIf user.active6

REQPOST /api/session7

ASRTLatency < 500ms8

ENDEnd9

Events

00:00.001Flow start

00:00.004Auth: Bearer token injected

00:00.012GET /api/v1/users → 200 · 142 ms

00:00.155Assert Status=200 → ok

00:00.160Extract $.data[0].id → uid="u-847"

00:00.162If user.active → true-branch

00:00.165Breakpoint hit · node 7

Variables

env.api_key

"***redacted***"

uid

"u-847"

user.active

true

DocumentationSupportCreate Ticket

API Testing in Action

See API Testing Live

API Testing › Flows

Mode: BasicOnline

API Flows

Create and manage API testing flows.

Impacted only

Flow Name	Nodes	Source	Last Run	Status
User Authentication Flow	12	Manual	2m ago	Passed
Order API Regression	8	OpenAPI	1h ago	Passed
Payment Gateway Smoke	6	Manual	4h ago	Failed
Inventory Sync Check	15	OpenAPI	12h ago	Passed
Session Token Refresh	4	Manual	1d ago	Passed

DocumentationSupportCreate Ticket

Visual flow editor — drag nodes, connect, run

API Testing › Sources

Mode: BasicOnline

API Sources

OpenAPI specification sources

Name	Latest	Status	Flows
Users API	v2.5.0	Healthy	4
Orders API	v4.1.2	Pending	3
Payments API	v1.3.0	Healthy	2
Inventory API	v3.0.0	Drift	1

Showing 4 of 6 sourceslast sync · 2m ago

DocumentationSupportCreate Ticket

OpenAPI sources — import, version, migrate automatically

API Testing › Runs › Debug

Mode: BasicOnline

Run #847 · User Auth Flow

9 nodes · Debug session

Paused

·Run #847·6/9 passed

Timeline

STARTStart1

AUTHBearer Auth2

REQGET /api/users3

ASRTStatus = 2004

XFRMExtract user.id5

CTRLIf user.active6

REQPOST /api/session7

ASRTLatency < 500ms8

ENDEnd9

Events

00:00.001Flow start

00:00.004Auth: Bearer token injected

00:00.012GET /api/v1/users → 200 · 142 ms

00:00.155Assert Status=200 → ok

00:00.160Extract $.data[0].id → uid="u-847"

00:00.162If user.active → true-branch

00:00.165Breakpoint hit · node 7

Variables

env.api_key

"***redacted***"

uid

"u-847"

user.active

true

DocumentationSupportCreate Ticket

Run with debug — timeline, events, variables

API Testing in EUC — We're the Only One

Login VSI, ControlUp, and NeoLoad don't have API testing. LoadGen makes you relevant to developer teams, not just IT ops. One platform for load testing, monitoring, and API automation.

Design Your First API Flow in Minutes

Import from OpenAPI, drag nodes, connect, run. No scripting required.