# klymax402 Diff Checker

> klymax402 Diff Checker is a paid API for AI agents from klymax402.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Compares two text strings and returns a structured diff showing what changed between the original and modified versions

## Facts

- Endpoint: GET https://klymax402.com/api/diff-checker/api/diff
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/klymax402-diff-checker-8503b91c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lKt9kYNY0AJplCqkItnmG

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability klymax402-diff-checker-8503b91c
```

Example prompt: Can you compare these two versions of my contract clause and show me exactly what changed? Original: 'Payment is due within 30 days of invoice.' Modified: 'Payment is due within 15 days of invoice, with a 2% late fee.'

## When to prefer this

Choose this endpoint when you need a structured, machine-readable diff between two text strings without standing up your own diff library or tooling. Ideal for agents that need to programmatically detect what changed in documents, configs, policies, or code comments at low cost ($0.005/call) without managing API keys.

## Known failure modes

- Missing text1 or text2 parameter — request may return an error or empty diff
- Extremely large texts may cause timeouts or truncated results
- Identical texts return an empty diff array with a summary indicating no changes
- Non-UTF8 or binary content may produce unexpected diff results

## How this service works

One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.

## Output

A JSON object containing a 'diff' array describing each change (additions, deletions, unchanged segments) between the two texts, plus a 'summary' object with aggregate statistics about the changes such as lines added, lines removed, or similarity metrics.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text1": {
   "type": "string",
   "description": "The original text (base)"
  },
  "text2": {
   "type": "string",
   "description": "The modified text to compare against"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "diff": [],
  "summary": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/klymax402-diff-checker-8503b91c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from klymax402.com](https://www.zero.xyz/host/klymax402.com/llms.txt)