What is Diff Checker X402?
Diff Checker X402 is an MCP server that compares two texts line-by-line and returns a structured diff with additions, deletions, unchanged lines, and summary statistics. It is a pay-per-call API using the x402 protocol (USDC on Base L2) with no API key, no signup, and no rate limit walls. It is part of the klymax402 marketplace of 100 x402 micropayment APIs for AI agents.
How to use Diff Checker X402?
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.
Key features of Diff Checker X402
- 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
Use cases of Diff Checker X402
- Code review: compare before/after versions of code
- Document revision tracking: identify changes between drafts
- Configuration file auditing: verify differences before deployment
- Template modification checking: compare template variants
- Automated diff tasks in AI agent workflows
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