# TradepilotUSA Text Line Compare

> TradepilotUSA Text Line Compare is a paid API for AI agents from www.tradepilotusa.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Compares two text strings line by line and returns a diff showing inserted, deleted, and equal lines with line counts

## Facts

- Endpoint: POST https://www.tradepilotusa.com/api/agent-commerce/v1/services/text_line_compare/execute?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tradepilotusa-text-line-compare-902792f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jquawrC8DTI0hEXHkN9VQ

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 tradepilotusa-text-line-compare-902792f0 -d '<json body>'
```

Example prompt: Can you compare these two versions of my config file and tell me exactly which lines were added or removed? Here's the before text: 'server=localhost\nport=8080\ndebug=false' and the after text: 'server=localhost\nport=9090\ndebug=true\nlog=verbose'.

## When to prefer this

Choose this endpoint when you need a fast, deterministic, line-by-line text diff with explicit counts of added and removed lines. It is ideal for comparing configuration files, document revisions, or code snippets where you need structured diff output (equal/insert/delete operations) rather than a prose summary of changes. Prefer it over LLM-based comparison when you need exact, reproducible results with no hallucination risk, and over general-purpose diff libraries when you want a hosted API with structured JSON output and per-call pricing.

## Known failure modes

- Input text exceeds 20000 character limit per field — request will fail or truncate
- Missing 'before' or 'after' fields in request body — may return an error or empty diff
- Non-string input types — schema validation failure
- Payment not included or insufficient USDC — 402 payment required response
- Network timeout if payload is very large near the character limit

## How this service works

Compare two texts using deterministic longest-common-subsequence line matching. Returns unchanged, removed and added lines. Preserves whitespace within lines; normalizes CRLF/CR to LF. Maximum 200 lines and 20,000 characters per text; not a semantic comparison.

## Output

Returns a JSON object containing an array of diff operations (each with a 'kind' of 'equal', 'insert', or 'delete' and the associated text), a count of added lines, a count of removed lines, and a flag indicating whether line endings were normalized. The computation is deterministic and local with no model or network calls.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "string",
   "maxLength": 20000
  },
  "before": {
   "type": "string",
   "maxLength": 20000
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "operations": [
    {
     "kind": "equal",
     "text": "First"
    },
    {
     "kind": "delete",
     "text": "Old"
    },
    {
     "kind": "insert",
     "text": "New"
    },
    {
     "kind": "equal",
     "text": "Last"
    }
   ],
   "added_lines": 1,
   "removed_lines": 1,
   "line_endings_normalized": true
  },
  "utility": "text_line_compare",
  "provenance": {
   "execution": "deterministic_local",
   "model_used": false,
   "network_request_performed": false
  },
  "request_id": "example_text_line_compare"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tradepilotusa-text-line-compare-902792f0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.tradepilotusa.com](https://www.zero.xyz/host/www.tradepilotusa.com/llms.txt)