Launched April 30, 2024
FlowTestAI
GenAI powered OpenSource IDE for API first workflows
FreeAIAPIOpen Source5,843 impressions#11 of its week
FlowTestAI is a local first IDE that lets you test APIs not just individually but also by chaining it with other APIs in a flow. Generate flows faster through LLMs, save them locally for privacy and collaborate with others using git or any vcs.
FlowTestAI is an open-source, local IDE that lets you generate, visualize, and run API-first workflows using GenAI.
- for
- Developers who need secure, fast end-to-end API testing and workflow automation.
- pricing
- open source
- license
- MIT
works withLangChain
Key features
6 features of FlowTestAI
- GenAI Flow Generation — Describe a workflow in natural language and LLM creates a runnable API-first graph in seconds.
- Drag-and-Drop Builder — Construct flows visually using nodes from OpenAPI specs.
- Local File System Storage — All files and credentials are saved locally, ensuring privacy and security.
- Version Control Integration — Workflows can be versioned and collaborated on with any git-compatible VCS.
- Graph Visualization — Provides a no-code graphical view of API calls and their sequence.
- Guardrails Against Hallucination — Filters out LLM hallucinations to keep generated flows reliable.
Use cases
- Create end-to-end tests as API-first workflows without boilerplate code.
- Automate periodic checks, e.g., fetch JIRA tickets, summarize with ChatGPT, and post to Slack.
- Securely test private or in-development APIs without exposing credentials.
- Collaborate on workflow definitions across a team using git.
FlowTestAI vs alternatives
| Best for | Local, privacy-first API workflow IDE | Open-source API testing tool | AI-powered visual backend builder | Fast web-app scaffolding | TypeScript-based CI/CD pipelines |
|---|---|---|---|---|---|
| Pricing | Open source | Free | Free | Free | Free |
| DevHunt upvotes | 1 | 48 | 118 | 147 | 158 |
| Launched | Apr 2024 | Jan 2023 | Jan 2023 | Jan 2023 | Jan 2024 |
- FlowTestAI vs Firecamp: Firecamp is an open-source Postman alternative focused on API testing, but runs in the cloud and lacks local-only privacy guarantees.
- FlowTestAI vs BuildShip: BuildShip offers a visual backend builder with AI assistance, yet is not specialized for API-first test workflows and is not purely local.
- FlowTestAI vs toddle: toddle focuses on rapid web-app development, not on API workflow generation or testing.
- FlowTestAI vs Fluent CI: Fluent CI lets you write CI/CD pipelines in TypeScript, whereas FlowTestAI targets API workflow creation and testing.
FlowTestAI FAQ
How does FlowTestAI keep my API credentials safe?+
Credentials are stored locally on your file system and never sent to external services.
Can I generate workflows without writing code?+
Yes, you can describe the desired flow in natural language or use the drag-and-drop UI to build it.
What LLM models are supported?+
Currently OpenAI models are used, with plans to add Gemini and others.
Is FlowTestAI a cloud service?+
No, it runs as a local Electron app, keeping all data on your machine.
Can I version my workflows?+
Workflows are saved as files, so any git-compatible version control system can track changes.
Summarized by DevHunt from blog.langchain.dev · Oct 1, 2026. Details may change; check the official site.