# Unique Lines Deduplicator – GPT-5.5 x402 Gateway

> Unique Lines Deduplicator – GPT-5.5 x402 Gateway is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.0001/call, status down (last checked 2026-09-15).

Removes duplicate lines from a text input, returning only unique lines, optionally with case-sensitive matching.

## Facts

- Endpoint: GET https://gpt55.558686.xyz/v1/tools/unique-lines
- Price: $0.0001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/unique-lines-deduplicator-gpt-5-5-x402-gateway-f9bc15bd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mkrG6Hm2b44b9wKJrvkHm

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 unique-lines-deduplicator-gpt-5-5-x402-gateway-f9bc15bd
```

Example prompt: I have this big list of names with a bunch of duplicates — can you remove all the repeated lines and give me just the unique ones? Treat 'Apple' and 'apple' as the same (case-insensitive).

## When to prefer this

Use this endpoint when you need a quick, pay-per-use (no subscription) API call to deduplicate lines in a text blob, especially in an automated pipeline that already uses x402 USDC micropayments on Base. Ideal for lightweight text cleaning tasks without standing up your own deduplication logic.

## Known failure modes

- Missing 'text' query parameter returns an error
- Text exceeding 50,000 characters rejected
- Payment failure via x402/USDC blocks the request
- Non-GET method returns 405
- Empty string input rejected (minLength: 1)

## How this service works

Deduplicate newline-separated text while preserving order and report duplicate counts without calling an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.0001 per request with x402 USDC on Base.

## Output

A JSON object with ok: true, tool: 'uniqueLines', a summary message, and the deduplicated lines of the input text.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "text": "apple\nbanana\napple\ncherry\nbanana\ndate",
   "case_sensitive": false
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "text"
     ],
     "properties": {
      "text": {
       "type": "string",
       "maxLength": 50000,
       "minLength": 1
      },
      "case_sensitive": {
       "type": "boolean"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "tool": {
       "type": "string"
      },
      "fetchedAt": {
       "type": "string"
      }
     },
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/unique-lines-deduplicator-gpt-5-5-x402-gateway-f9bc15bd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt55.558686.xyz](https://www.zero.xyz/host/gpt55.558686.xyz/llms.txt)