---
title: "Execute prompt-perplexity evaluator"
method: POST
path: "/v2/evaluators/prompt-perplexity/execute"
tags: ["evaluators"]
---

# Execute prompt-perplexity evaluator

`POST /v2/evaluators/prompt-perplexity/execute`

Measure prompt perplexity to detect potential injection attempts

**Request Body:**
- `input.prompt` (string, required): The prompt to calculate perplexity for

## Request body

- RequestPromptPerplexityRequest
  - `input` RequestPromptPerplexityInput, required
    - `prompt` string, required

## Response `200`

OK

- ResponsePromptPerplexityResponse
  - `perplexity_score` number

## Other responses

- `400` — Bad Request
- `500` — Internal Server Error

## Changes

> 11 revisions in range; 1 could not be searched.

- **2026-04-12** `bd3e46b75d87` — 1 info
  - endpoint added
- **2026-01-01** `aef6c851927f` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/traceloop/apis/traceloop-api/changes/v2/evaluators/prompt-perplexity/execute/post.md)

---

[API](https://skmtc.dev/traceloop/apis/traceloop-api.md) · [All operations](https://skmtc.dev/traceloop/apis/traceloop-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/traceloop/traceloop-api/revisions/9c12a04a5947/schema)