# Text Diff API - Compare Two Texts, 0-100 Similarity Score (`eliai/text-diff-tool`) Actor Text diff and similarity API. Input: two text strings. Output: JSON with line- and word-level diffs, counted additions and deletions, and a 0-100 similarity score. Deterministic, no API key. Pay per result: $0.02 per diff run. Good for dedup and change tracking. - **URL**: https://apify.com/eliai/text-diff-tool.md - **Developed by:** [Anthony Snider](https://apify.com/eliai) (community) - **Categories:** Developer tools, AI, Automation - **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks - **User rating**: No ratings yet ## Pricing $20.00 / 1,000 diff runs This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events. Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event ## What's an Apify Actor? Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases. In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours, and optionally produces a well-defined JSON output, datasets with results, or files in key-value store. In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server. Actors are written with capital "A". ## How to integrate an Actor? If asked about integration, you help developers integrate Actors into their projects. You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready. The best way to integrate Actors is as follows. In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js/docs.md): ```bash npm install apify-client ``` In Python projects, use official [Python client library](https://docs.apify.com/api/client/python/docs.md): ```bash pip install apify-client ``` In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md): ````bash # MacOS / Linux curl -fsSL https://apify.com/install-cli.sh | bash # Windows irm https://apify.com/install-cli.ps1 | iex ```bash In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/integrations/mcp.md). If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md). For usage examples, see the [API](#api) section below. For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt). # README ## Text Diff & Similarity Compare two texts and get a clean diff plus similarity metrics in one call. **Live on the Apify Store — run it instantly or call it as an agent tool via Apify MCP.** ### What you get - **Structured diff** — an ordered list of operations `[{ type: add | del | equal, value }]` at **line** or **word** granularity (Myers/LCS). - **Similarity score** — a `0–100` percentage blending a character-level Levenshtein ratio with token-set Jaccard. - **Change counts** — `added`, `removed`, `changed`, and `equal` units. - **Bulk mode** — pass a `pairs` array to diff up to 50 text pairs in a single run. ### Input ```json { "textA": "The quick brown fox\njumps over the lazy dog.\nGoodbye.", "textB": "The quick brown fox\nleaps over the lazy dog.\nHello there.\nGoodbye.", "mode": "line" } ```` | Field | Type | Required | Description | | ------- | ------ | -------- | -------------------------------------------- | | `textA` | string | yes | Original / left text. | | `textB` | string | yes | Changed / right text. | | `mode` | string | no | `line` (default) or `word` diff granularity. | Bulk: send `{ "pairs": [{ "textA": "...", "textB": "...", "mode": "word" }, ...] }`. ### Output ```json { "mode": "line", "similarityPct": 74.62, "added": 2, "removed": 1, "changed": 1, "equal": 2, "levenshteinRatioPct": 64.81, "jaccardPct": 84.42, "diff": [ { "type": "equal", "value": "The quick brown fox" }, { "type": "del", "value": "jumps over the lazy dog." }, { "type": "add", "value": "leaps over the lazy dog." }, { "type": "add", "value": "Hello there." }, { "type": "equal", "value": "Goodbye." } ] } ``` One dataset item is pushed per text pair. # Actor input Schema ## `textA` (type: `string`): The original / left-hand text to compare. ## `textB` (type: `string`): The changed / right-hand text to compare against Text A. ## `mode` (type: `string`): Compare line by line or word by word. ## Actor input object example ```json { "textA": "The quick brown fox\njumps over the lazy dog.\nGoodbye.", "textB": "The quick brown fox\nleaps over the lazy dog.\nHello there.\nGoodbye.", "mode": "line" } ``` # API You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup. ## JavaScript example ```javascript import { ApifyClient } from 'apify-client'; // Initialize the ApifyClient with your Apify API token // Replace the '' with your token const client = new ApifyClient({ token: '', }); // Prepare Actor input const input = { "textA": `The quick brown fox jumps over the lazy dog. Goodbye.`, "textB": `The quick brown fox leaps over the lazy dog. Hello there. Goodbye.` }; // Run the Actor and wait for it to finish const run = await client.actor("eliai/text-diff-tool").call(input); // Fetch and print Actor results from the run's dataset (if any) console.log('Results from dataset'); console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`); const { items } = await client.dataset(run.defaultDatasetId).listItems(); items.forEach((item) => { console.dir(item); }); // 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs ``` ## Python example ```python from apify_client import ApifyClient # Initialize the ApifyClient with your Apify API token # Replace '' with your token. client = ApifyClient("") # Prepare the Actor input run_input = { "textA": """The quick brown fox jumps over the lazy dog. Goodbye.""", "textB": """The quick brown fox leaps over the lazy dog. Hello there. Goodbye.""", } # Run the Actor and wait for it to finish run = client.actor("eliai/text-diff-tool").call(run_input=run_input) # Fetch and print Actor results from the run's dataset (if there are any) print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"]) for item in client.dataset(run["defaultDatasetId"]).iterate_items(): print(item) # 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start ``` ## CLI example ```bash echo '{ "textA": "The quick brown fox\\njumps over the lazy dog.\\nGoodbye.", "textB": "The quick brown fox\\nleaps over the lazy dog.\\nHello there.\\nGoodbye." }' | apify call eliai/text-diff-tool --silent --output-dataset ``` ## MCP server setup ```json { "mcpServers": { "apify": { "command": "npx", "args": [ "mcp-remote", "https://mcp.apify.com/?tools=eliai/text-diff-tool", "--header", "Authorization: Bearer " ] } } } ``` ## OpenAPI specification ```json { "openapi": "3.0.1", "info": { "title": "Text Diff API - Compare Two Texts, 0-100 Similarity Score", "description": "Text diff and similarity API. Input: two text strings. Output: JSON with line- and word-level diffs, counted additions and deletions, and a 0-100 similarity score. Deterministic, no API key. Pay per result: $0.02 per diff run. Good for dedup and change tracking.", "version": "0.1", "x-build-id": "58XGjiL9E59NKhmop" }, "servers": [ { "url": "https://api.apify.com/v2" } ], "paths": { "/acts/eliai~text-diff-tool/run-sync-get-dataset-items": { "post": { "operationId": "run-sync-get-dataset-items-eliai-text-diff-tool", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } }, "/acts/eliai~text-diff-tool/runs": { "post": { "operationId": "runs-sync-eliai-text-diff-tool", "x-openai-isConsequential": false, "summary": "Executes an Actor and returns information about the initiated run in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/runsResponseSchema" } } } } } } }, "/acts/eliai~text-diff-tool/run-sync": { "post": { "operationId": "run-sync-eliai-text-diff-tool", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } } }, "components": { "schemas": { "inputSchema": { "type": "object", "required": [ "textA", "textB" ], "properties": { "textA": { "title": "Text A (original)", "type": "string", "description": "The original / left-hand text to compare." }, "textB": { "title": "Text B (changed)", "type": "string", "description": "The changed / right-hand text to compare against Text A." }, "mode": { "title": "Diff granularity", "enum": [ "line", "word" ], "type": "string", "description": "Compare line by line or word by word.", "default": "line" } } }, "runsResponseSchema": { "type": "object", "properties": { "data": { "type": "object", "properties": { "id": { "type": "string" }, "actId": { "type": "string" }, "userId": { "type": "string" }, "startedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "finishedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "status": { "type": "string", "example": "READY" }, "meta": { "type": "object", "properties": { "origin": { "type": "string", "example": "API" }, "userAgent": { "type": "string" } } }, "stats": { "type": "object", "properties": { "inputBodyLen": { "type": "integer", "example": 2000 }, "rebootCount": { "type": "integer", "example": 0 }, "restartCount": { "type": "integer", "example": 0 }, "resurrectCount": { "type": "integer", "example": 0 }, "computeUnits": { "type": "integer", "example": 0 } } }, "options": { "type": "object", "properties": { "build": { "type": "string", "example": "latest" }, "timeoutSecs": { "type": "integer", "example": 300 }, "memoryMbytes": { "type": "integer", "example": 1024 }, "diskMbytes": { "type": "integer", "example": 2048 } } }, "buildId": { "type": "string" }, "defaultKeyValueStoreId": { "type": "string" }, "defaultDatasetId": { "type": "string" }, "defaultRequestQueueId": { "type": "string" }, "buildNumber": { "type": "string", "example": "1.0.0" }, "containerUrl": { "type": "string" }, "usage": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "integer", "example": 1 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } }, "usageTotalUsd": { "type": "number", "example": 0.00005 }, "usageUsd": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "number", "example": 0.00005 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } } } } } } } } } ```