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n8n community node for TypeSafe Jev structured AI decisions
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- Last pushed
- Updated Sep 2026
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CommunityJev Integrations & Adapters
n8n Nodes TypeSafe Jev
n8n community node that asks Jev several independent questions about the same state in one execution, returning typed probabilities for choice, yes/no and rubric scoring questions.
- Stars
- 2
- Language
- TypeScript
- License
- MIT
- Published by
- Community
- Author
- n3ndor
- Last verified
- Oct 2026
About this project
An n8n community node for TypeSafe Jev, the TypeSafe System One model for fast, structured decisions. Jev returns typed decisions rather than generated prose. In a single node execution you can ask several independent questions about the same state and get back calibrated probabilities for classification, routing, verification and scoring.
Quoted from the project's README. Read the full README.
Works forJev for Classification
Used inJev for Software & DevTools
- Languages
- TypeScript
Highlights
- No runtime dependencies: it uses n8n's own HTTP helper instead of a vendor SDK, which n8n verification requires.
- Releases since 0.4.0 ship from GitHub Actions with an npm provenance attestation you can check yourself.
- Simplify flattens each answer to the single value you would branch on, so a Switch node can read it directly.
- Question schemas are validated before any request goes out, and API failures surface status, message and request ID.
Watch out
Unofficial and community-maintained, with no relationship to TypeSafe. It requires Node.js 20.15 or newer, and the model dropdown is populated from your own account, so you need a working key before anything is listed. The node holds no branching logic of its own: an error stops the item unless you enable Continue On Fail. Checking it against the live API needs a key of its own, while the lint, test and build scripts do not. Copy reviewed against the repository README on 2026-10-04, not from running it.
Questions about this entry
Short answers drawn from the linked project or page.
No. The package has no runtime dependencies and declares n8n-workflow as a peer dependency, and the node calls the API through n8n's own HTTP helper rather than a vendor SDK. That is not just tidiness: n8n's verification guidelines do not permit runtime dependencies, so the HTTP-helper approach is what makes the node installable through Settings, Community Nodes, Install.
Two different failure classes. Schema problems are caught before any request: names must be unique, choices need at least two labels, scores need at least two rubric levels, and those come back as configuration errors. API failures are reported separately with the HTTP status, the server's message and the TypeSafe request ID. Turn on Continue On Fail to pass an item with an error field instead of stopping, and Retry On Fail for transient problems.
Yes. The node sets usableAsTool, so it can be attached to an AI Agent, and the agent supplies the state while Jev returns a typed decision rather than free text. That is the difference from a bare HTTP call: the tool signature already carries the question schema and the answer shape, so the model does not have to be told how to parse the response.
You get three typed question builders instead of a raw body. Choice takes two or more labelled options with optional descriptions and returns a choice, confidence and a probability per label; yes/no returns a noul with the probability of yes; score takes an ordered rubric lowest first and returns the expected score, confidence, legend and per-level probabilities. Output modes are Append to Item, Response Only and Answers Only, and Options covers timeout, output field rename and including the request ID.
Append to Item adds the full response under typesafeJev and keeps the incoming fields; Response Only returns model, answers, and usage; Answers Only returns just answers. Simplify then reduces each answer to the value you branch on.
Before any request the node checks that names are unique, choices have at least two labels, and scores have at least two rubric levels. Schema problems are reported as configuration errors before a call is made.
Node.js 20.15 or newer. It declares n8n-workflow as a peer dependency and ships no runtime dependencies.
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Posts from builders shipping with Jev right now.