# GPT-5.5 Plus Structured JSON Extraction

> GPT-5.5 Plus Structured JSON Extraction is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.17/call, status unknown (last checked 2026-09-14).

Extracts structured JSON data from large or complex text using GPT-5.5 at the plus model tier, supporting schemas up to 700,000 input characters and 4,096 output tokens.

## Facts

- Endpoint: POST https://gpt55.558686.xyz/v1/tools/extract-json/plus
- Price: $0.17/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpt-5-5-plus-structured-json-extraction-1d8cff30
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ddEbqEljoVBCGqj5r7ZN6

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-plus-structured-json-extraction-1d8cff30 -d '<json body>'
```

Example prompt: Extract the following fields — company_name, revenue, CEO, founding_year, and headquarters — from this 50-page annual report text as a JSON object: [paste text here]. Use the plus tier and allow up to 4096 output tokens.

## When to prefer this

Choose this endpoint when you need to extract structured JSON from large or complex documents (up to 700k characters) and require the higher-capacity plus model tier. Prefer this over the standard extraction tier when the schema is complex, the text is long, or output fidelity is critical. Suitable for enterprise document parsing, legal text extraction, or multi-field schema mapping tasks.

## Known failure modes

- Input text exceeds 700,000 character limit — request rejected
- Schema too complex for model to resolve in token budget — partial or truncated output
- Invalid schema object provided — 400 validation error
- Payment of $0.17 USDC on Base not settled — 402 Payment Required
- Temperature or max_tokens out of allowed range — 422 validation error
- Model returns malformed JSON that doesn't conform to schema — agent must retry or validate

## How this service works

Plus structured extraction for larger or more complex schemas. Model tier: plus; upstream model: gpt-5.5. Price is derived from official OpenAI relative token costs with a local margin and floor. Pay up to $0.17 per request with x402 USDC on Base. Public paid calls are limited to 700000 input characters and 4096 output tokens.

## Output

Returns a JSON object with values extracted from the input text, conforming to the provided schema or field list. Fields not found in the text may be null or absent. Output is bounded by the specified max_tokens (up to 4096).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 700000,
   "minLength": 1
  },
  "fields": {
   "type": "array",
   "items": {
    "type": "string"
   }
  },
  "schema": {
   "type": "object",
   "additionalProperties": true
  },
  "max_tokens": {
   "type": "integer",
   "maximum": 4096,
   "minimum": 1
  },
  "temperature": {
   "type": "number",
   "maximum": 2,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gpt-5-5-plus-structured-json-extraction-1d8cff30/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)