# GPT-5.4-mini Structured JSON Extraction (Mini Tier)

> GPT-5.4-mini Structured JSON Extraction (Mini Tier) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.003232/call, status unknown (last checked 2026-10-20).

Extracts structured JSON from unstructured text using a low-cost mini-tier GPT model, supporting custom field lists or schema-driven output.

## Facts

- Endpoint: POST https://gpt55.558686.xyz/v1/tools/extract-json/mini?utm_source=zero.xyz
- Price: $0.003232/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Success rate: 0% of calls made through Zero
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpt-5-4-mini-structured-json-extraction-mini-tier-95127037
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6rowfh_GQcSce5Bp-h622

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-5-4-mini-structured-json-extraction-mini-tier-95127037 -d '<json body>'
```

Example prompt: Extract the following fields from this text as JSON — 'company_name', 'revenue', 'founded_year', and 'headquarters' — from: 'Acme Corp was founded in 1998 and is headquartered in Austin, Texas, with annual revenue of $45 million.'

## When to prefer this

Choose this endpoint when you need low-cost, fast structured JSON extraction or classification from text and can tolerate a mini-tier model. Ideal for high-volume extraction pipelines where cost per call matters and the task doesn't require maximum reasoning power. Prefer over full GPT-5.5 endpoints when tasks are straightforward field extraction, entity parsing, or classification rather than complex generation.

## Known failure modes

- Input text exceeds 700,000 character limit — request rejected
- max_tokens exceeds 4096 — validation error
- Temperature out of 0–2 range — bad request
- Payment not provided or insufficient USDC — x402 payment required response
- Model fails to extract requested fields — returns partial or empty JSON object
- Malformed schema object — extraction may fail or produce unexpected structure

## How this service works

Low-cost structured extraction and classification-friendly JSON output. Model tier: mini; upstream model: gpt-5.4-mini. Price is derived from official OpenAI relative token costs with a local margin and floor. Pay up to $0.003232 per request with x402 USDC on Base. Public paid calls are limited to 700000 input characters and 4096 output tokens.

## Output

Returns a structured JSON object with the requested fields extracted or classified from the input text, conforming to any provided schema, up to 4096 output tokens.

## 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-5-4-mini-structured-json-extraction-mini-tier-95127037/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)