The page can be tried online, but API access requires membership. Each membership level costs 1,000 CNY and includes 100,000 API calls.

Will the API invent missing headings?

No. It is designed as a deterministic TOC tool and only outputs based on input content and rules.

How should LLM products use it?

Use it as a function-calling or tools layer before or after LLM document processing to extract, detect, validate, and correct TOC structure.

Member API

Member API for millisecond TOC processing

Use SUPTOC as a deterministic auxiliary tool for LLM products. API access requires membership; each 1,000 CNY membership level grants 100,000 API calls.

Activate membership

curl -X POST https://api.suptoc.com/v1/toc/validate-and-correct \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Chapter 1 Overview\n1.1 Product\nChapter 3 API",
    "tasks": ["extract", "detect", "validate", "correct"]
  }'

API capabilities

One API can extract structure, detect style, validate issues, and correct TOC problems.

API

extract_text_toc

Extract a TOC tree from text and return JSON.

API

detect_style_toc

Detect current TOC style and mixed rules.

API

validate_toc

Validate skipped numbering, missing levels, duplicates, and discontinuity.

API

correct_toc

Correct numbering and hierarchy by language rules.

API

Millisecond latency

Suitable as a synchronous tool in LLM calling chains.

API

No-hallucination boundary

Does not invent headings absent from source text.

Request body

textTOC text to process, required

tasksextract / detect / validate / correct, multiple allowed

languageauto / zh / en

strictenable strict no-hallucination constraints

return_formatjson / markdown / csv

Response example

{
  "status": "completed",
  "elapsed_ms": 11,
  "style": "numeric numbered TOC",
  "hallucination_policy": "source_bound_only",
  "issues": [
    {
      "type": "missing_chapter",
      "line": 3,
      "message": "Chapter number jumps from 1 to 3"
    }
  ],
  "corrected_text": "Chapter 1 Overview\n1.1 Product\nChapter 2 API",
  "toc": [
    { "title": "Chapter 1 Overview", "level": 1, "children": [] }
  ]
}

Membership rule

API access requires membership. Each upgrade level costs 1,000 CNY and grants 100,000 API calls. Upgrade again for more quota.

View membership Contact to activate