# GPT-5.5 Text Summarization Tool (x402)

> GPT-5.5 Text Summarization Tool (x402) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.00293/call, status unknown (last checked 2026-09-16).

Summarizes a block of text into a specified format (bullets, paragraph, one sentence) using GPT-5.5, paid per-call via x402 USDC on Base.

## Facts

- Endpoint: POST https://gpt55.558686.xyz/v1/tools/summarize
- Price: $0.00293/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpt-5-5-text-summarization-tool-x402-0d3abb90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L6ShAbP9xzUe7hcNTW28F

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 gpt-5-5-text-summarization-tool-x402-0d3abb90 -d '<json body>'
```

Example prompt: Can you summarize this article in bullet points, keeping it under 300 tokens? Here's the text: [paste long article text here].

## When to prefer this

Choose this endpoint when you need cheap, per-call text summarization without a subscription, especially in agentic pipelines that already handle x402 micropayments on Base. At $0.0025 per call it is cost-effective for moderate summarization workloads where you want GPT-5.5 quality with flexible format control (bullets, paragraph, one sentence).

## Known failure modes

- Text input exceeds 700,000 character limit — request rejected
- max_tokens set above 4096 — validation error
- Payment not provided or insufficient USDC on Base — 402 Payment Required
- Empty text field — minLength validation error
- Temperature out of 0–2 range — validation error
- Network or upstream GPT-5.5 model timeout

## How this service works

Summarize short text into concise bullets, TLDR notes, or a paragraph for agents that need quick document digestion. Pay up to $0.003 per request with x402 USDC on Base. Public paid calls are limited to 1500 input characters and 128 output tokens.

## Output

A JSON object with a 'text' field containing the generated summary in the requested format (bullets, paragraph, or one sentence), produced by GPT-5.5.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 700000,
   "minLength": 1
  },
  "format": {
   "type": "string",
   "description": "Desired summary style, e.g. bullets, paragraph, one sentence."
  },
  "max_tokens": {
   "type": "integer",
   "maximum": 4096,
   "minimum": 1
  },
  "temperature": {
   "type": "number",
   "maximum": 2,
   "minimum": 0
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "Concise summary text."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gpt-5-5-text-summarization-tool-x402-0d3abb90/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)