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Delx Markdown Heading Index
x402
Delx Markdown Heading Index is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Parses and indexes ATX-style markdown headings (# H1, ## H2, etc.) from caller-supplied text, returning a structured JSON list of headings with levels and positions
Price / call$0.003
Success—
StatusUnknown
How this service works
Index markdown ATX headings from caller-supplied text only — call when indexing ATX headings in caller-supplied markdown. Use on text/URLs the agent already holds—adjacent to high-volume extract demand, never advertised as general web or X search. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web search, or media generation.…
Output
A deterministic, machine-readable JSON array of ATX headings found in the input text, each entry including the heading level (1–6), the heading text content, and its position or order in the document — suitable for building tables of contents, validating structure, or guiding downstream chunking logic.
Example use cases
Table of contents generation
“I have this markdown document and I want to auto-generate a table of contents — can you extract all the ATX headings with their levels from this text so I can build the TOC? Here's the markdown: '# Overview\n## Installation\n### Prerequisites\n## Usage\n### Examples\n## Contributing'”
Document structure validation
“Can you pull out all the headings from this markdown I already have and tell me their hierarchy levels, so I can check whether the document structure is well-organized? The text starts with '# Project Readme\n## Getting Started\n#### Skipped Level\n## Advanced'”
Section-aware RAG chunking prep
“Before I chunk this markdown for RAG, I need to know where all the section boundaries are — can you index all the ATX headings and their positions in this text so I can split on them intelligently?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/markdown-heading-indexWhen to prefer
Choose this endpoint when you already hold a markdown document or text string and need a fast, stateless, deterministic extraction of its ATX heading structure — no network access, no upstream calls, no data retention. Prefer it over a general-purpose LLM extraction when you need reliable, machine-readable JSON output at low cost ($0.003) and deterministic behavior. Not suitable for fetching remote documents, searching the web, or processing setext-style markdown headings.
Side effects
- Empty or missing 'text' field returns an empty heading list or validation error
- Non-markdown plain text with no '#' characters returns an empty index
- Setext-style headings (underline syntax) are not extracted since only ATX style is supported
- Very large text inputs may hit size limits
- Malformed UTF-8 encoding may cause parsing errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | UTF-8 text to encode, chunk, index, or analyze (caller-supplied only). |
Output
Schema · Response
{
"type": "json",
"example": {
"schema": "delx/util-markdown-heading-index/v1",
"headings": [
{
"level": 1,
"title": "Title"
},
{
"level": 2,
"title": "Section"
}
],
"truncated": false,
"heading_count": 2
}
}Tags
x402
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