Diff Checker X402

by Br0ski777

234 downloads

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GitHub

Developer Tools

About

Compare two texts line-by-line. Returns structured diff with additions, deletions, unchanged lines, and summary stats. -- x402 micropayment API + MCP server for AI agents

Details

Author: Br0ski777
Downloads: 234
Categories: Developer Tools

- Line-by-line text comparison with structured output
- Pay-per-call micropayments via x402 (USDC on Base)
- No API key, signup, or rate limits required
- Single tool: text_compare_diff at $0.002 per call
- Returns summary stats (lines added, removed, unchanged, similarity %)
- Part of the klymax402 ecosystem of 100 x402 APIs

Setting up with Highlight

This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:

Download and install Highlight from highlightai.com/download
Navigate to the plugins tab and select "Add Custom Plugin"
Configure the plugin with the settings below

Plugin Name Diff Checker X402

Command (node, npx, python, etc.)

Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
Enable "Start Automatically" if you want the plugin to start when Highlight launches

Setting up with Cursor

Open Cursor's settings
Navigate to the MCP section
Click "Add new Global MCP server"
Copy and paste the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

Setting up with Claude Desktop

Open Claude Desktop's settings
Go to the Integrations tab
Click "Add MCP Server"
Use the configuration below based on your operating system

Note: Make sure Claude Desktop is running before attempting to connect.

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

Setting up with Windsurf

Open Windsurf's preferences
Go to the Integrations section
Click "Add MCP Integration"
Use the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

Setting up with Cline

Open Cline's settings
Navigate to the Integrations section
Click "Add MCP Server"
Copy and paste the configuration below based on your operating system

Note: Make sure to restart Cline after adding the configuration.

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

Setting up with Goose

Open Goose's preferences
Go to the Integrations tab
Select "MCP Servers"
Click "Add New Server"
Use the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

From the repository

Add the server to your MCP client configuration (e.g., Claude Desktop, Cursor, ElizaOS) using the URL https://diff-checker.api.klymax402.com/mcp. For direct HTTP calls, use curl with a POST to /api/diff and include the two texts; a 402 payment challenge will be returned, which any x402-aware client (like @x402/fetch or x402-agent-tools) handles automatically.

Claude Desktop / Cursor

Paste into your MCP client config file to install this server.

{
    "mcpServers": {
        "diff checker x402": {
            "diff-checker": {
                "url": "https://diff-checker-production.up.railway.app/mcp",
                "transport": "sse"
            }
        }
    }
}

McpServers

{
    "diff-checker": {
        "url": "https://diff-checker-production.up.railway.app/mcp",
        "transport": "sse"
    }
}

Diff Checker API

Compare two texts line-by-line. Returns structured diff with additions, deletions, unchanged lines, and summary stats. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "diff-checker": {
      "url": "https://diff-checker.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://diff-checker.api.klymax402.com/api/diff" \
  -H "Content-Type: application/json" \
  -d '{"text1":"...","text2":"..."}'
-> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
| text_compare_diff | POST | /api/diff | $0.002 | Compare two texts and show line-by-line differences |

`text_compare_diff`

Use this when you need to compare two pieces of text and identify exactly what changed between them. Returns a structured line-by-line diff with summary statistics.

Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| text1 | string | yes | The original text (base) |
| text2 | string | yes | The modified text to compare against |

Example response:

{"changes":[{"type":"unchanged","content":"line 1"},{"type":"removed","content":"old line 2"},{"type":"added","content":"new line 2"}],"linesAdded":1,"linesRemoved":1,"linesUnchanged":1,"similarity":66.7}

When to use: code review (comparing before/after), tracking document revisions, verifying config file changes, or auditing template modifications. Use this BEFORE deploying config changes to understand what differs.

Not for: text classification (use text_classify_content), sentiment analysis (use text_analyze_sentiment), word counting (use text_count_words).

Example agent prompts

- "Compare two pieces of text and identify exactly what changed between them"

Payment

- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (eip155:8453)
- Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats

License

MIT

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Diff Checker X402

About

Details

Jump to

Setting up with Highlight

Setting up with Cursor

JSON

JSON

JSON

Setting up with Claude Desktop

JSON

JSON

JSON

Setting up with Windsurf

JSON

JSON

JSON

Setting up with Cline

JSON

JSON

JSON

Setting up with Goose

JSON

JSON

JSON

From the repository

Claude Desktop / Cursor

McpServers

Diff Checker API

Quickstart -- MCP

Quickstart -- HTTP (x402)

-> 402 Payment Required, with an x402 payment challenge in the response body

Tools

`text_compare_diff`

Example agent prompts

Payment

Part of klymax402

License

Install

About

Details

Jump to

Setting up with Highlight

From the repository

Claude Desktop / Cursor

McpServers

Diff Checker API

Quickstart -- MCP

Quickstart -- HTTP (x402)

-> 402 Payment Required, with an x402 payment challenge in the response body

Tools

text_compare_diff

Example agent prompts

Payment

Part of klymax402

License

Install

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