API Response Diff & Semantic Analyzer

Compare two API response payloads, highlight field-level diffs, and classify likely functional changes versus harmless runtime drift

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Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/api-response-diff-semantic-analyzer' \
  -H 'Content-Type: application/json' \
  -d '{"leftResponseJson":"{\"id\":\"c1a1c77d-8ab1-4f5f-a2b7-a5796a7f7d10\",\"name\":\"Alice\",\"createdAt\":\"2026-04-07T09:00:00Z\",\"profile\":{\"tier\":\"pro\",\"quota\":10}}","rightResponseJson":"{\"id\":\"a9f4e419-c5ef-4df6-b274-28a86f4d1b40\",\"name\":\"Alice\",\"createdAt\":\"2026-04-07T09:05:00Z\",\"profile\":{\"tier\":\"enterprise\",\"quota\":\"10\"}}","leftEndpointUrl":"","rightEndpointUrl":"","httpMethod":"GET","requestHeadersJson":"{}","requestBodyJson":"{}","leftLabel":"staging","rightLabel":"production","ignoreSafeDrift":true,"useAiSemanticReview":true}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/api-response-diff-semantic-analyzer

Parameters

Name	Type	Required	Description
leftResponseJson	textarea	No	—
rightResponseJson	textarea	No	—
leftEndpointUrl	text	No	—
rightEndpointUrl	text	No	—
httpMethod	select	No	—
requestHeadersJson	textarea	No	—
requestBodyJson	textarea	No	—
leftLabel	text	No	—
rightLabel	text	No	—
ignoreSafeDrift	checkbox	No	—
useAiSemanticReview	checkbox	No	—

Response format

HTML result

JSON

{
  "result": "<div>Processed HTML content</div>",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-api-response-diff-semantic-analyzer": {
      "name": "api-response-diff-semantic-analyzer",
      "description": "Compare two API response payloads, highlight field-level diffs, and classify likely functional changes versus harmless runtime drift",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=api-response-diff-semantic-analyzer",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "api-response-diff-semantic-analyzer",
    "arguments": {
  "leftResponseJson": "{\"id\":\"c1a1c77d-8ab1-4f5f-a2b7-a5796a7f7d10\",\"name\":\"Alice\",\"createdAt\":\"2026-04-07T09:00:00Z\",\"profile\":{\"tier\":\"pro\",\"quota\":10}}",
  "rightResponseJson": "{\"id\":\"a9f4e419-c5ef-4df6-b274-28a86f4d1b40\",\"name\":\"Alice\",\"createdAt\":\"2026-04-07T09:05:00Z\",\"profile\":{\"tier\":\"enterprise\",\"quota\":\"10\"}}",
  "leftEndpointUrl": "",
  "rightEndpointUrl": "",
  "httpMethod": "GET",
  "requestHeadersJson": "{}",
  "requestBodyJson": "{}",
  "leftLabel": "staging",
  "rightLabel": "production",
  "ignoreSafeDrift": true,
  "useAiSemanticReview": true
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]