---
title: "List engine filters"
method: GET
path: "/compose/effects/engine"
tags: ["Compose"]
---

# List engine filters

`GET /compose/effects/engine`

Every engine filter an `engine` effect may name, {"type":"engine","service":"...","params":{...}}, with its own property names and what each accepts. A filter a built-in effect already covers is not listed: use the built-in.

## Response `200`

The engine filters

- object
  - `data` object, required
    - `services` object[], required
      - `service` string, required — What goes in the entry's "service".
      - `checked` 'proven' | 'unproven' | 'nondeterministic', required — What the engine's render check found. proven: its parameters visibly change the output. unproven: it renders, and the check could not show a parameter doing anything. nondeterministic: it renders differently every time, by design (noise, glitches).
      - `params` object, required — What goes in "params", by the engine's own property names.

## Other responses

- `401` — Unauthorized

## Changes

- **2026-09-24** `14f92fdd491f` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/rendobar/apis/rendobar-api/changes/compose/effects/engine/get.md)

---

[API](https://skmtc.dev/rendobar/apis/rendobar-api.md) · [All operations](https://skmtc.dev/rendobar/apis/rendobar-api/llms.txt) · [OpenAPI document](https://skmtc.dev/rendobar/apis/rendobar-api/revisions/421a5a241a64?raw)