---
title: "Returns the last two measured results for one compiled prompt across engines. Free. Use after publishing a fix to see whether mention moved omit/collide → win."
method: GET
path: "/diff_prompt"
tags: ["read"]
---

# Returns the last two measured results for one compiled prompt across engines. Free. Use after publishing a fix to see whether mention moved omit/collide → win.

`GET /diff_prompt`

## Request

- Base URL: `https://scope.online/v1`
- URL: `https://scope.online/v1/diff_prompt`
- Auth: HTTP bearer

## Query parameters

- `business_id` string, uuid, required: Owned Scope business ID
- `prompt` string, required: Prompt text or compiled_text

## Response `200`

Tool payload. `meta` holds tldr, next[], pagination cursors, and request_id.

## Other responses

- `400`: Invalid request.
- `401`: Missing or invalid API key.
- `402`: Quota or over-committed.
- `403`: Missing scope or Growth required.
- `404`: Unknown tool or resource.
- `405`: Wrong HTTP method for this tool.
- `429`: Rate limited (10 action calls / 60s per key; reads are higher).
- `503`: Temporary infrastructure limit — retry with retry_after.

---

[API](https://skmtc.dev/scope/apis/scope-api-2.md) · [All operations](https://skmtc.dev/scope/apis/scope-api-2/llms.txt) · [OpenAPI document](https://skmtc.dev/scope/apis/scope-api-2/revisions/2f01893f6e5c?raw)