---
title: "Compare two Saved Versions and return per-file additions, removals, modifications, and compact diffs"
method: POST
path: "/api/mcp/tools/compare_saved_versions"
tags: ["tools"]
---

# Compare two Saved Versions and return per-file additions, removals, modifications, and compact diffs

`POST /api/mcp/tools/compare_saved_versions`

## Request

- Base URL: `https://finestructure.ai`
- URL: `https://finestructure.ai/api/mcp/tools/compare_saved_versions`
- Auth: HTTP bearer

Compare two Saved Versions and return per-file additions, removals, modifications, and compact diffs.

## Request body

- object
  - `app_id` string, required: The app ID
  - `base_snapshot_id` string, required: Older/base snapshot ID
  - `target_snapshot_id` string, required: Newer/target snapshot ID
  - `max_diff_chars` integer

## Response `200`

Tool executed successfully

- ToolResult
  - `ok` boolean, required
  - `tool` string, required
  - `result` object, required

## Other responses

- `400`: Invalid arguments for this tool
- `401`: Missing or invalid bearer token
- `402`: Not enough credits on the account
- `403`: Token scope does not permit this tool
- `404`: Unknown tool name
- `429`: Rate limit exceeded, retry after the indicated delay
- `500`: Internal error while executing the tool

---

[API](https://skmtc.dev/finestructure/apis/fine-structure-api.md) · [All operations](https://skmtc.dev/finestructure/apis/fine-structure-api/llms.txt) · [OpenAPI document](https://skmtc.dev/finestructure/apis/fine-structure-api/revisions/02c50ed5fd70?raw)