# Hacker News Discussion Search: Search, Retrieval & RAG Systems

> Hacker News Discussion Search: Search, Retrieval & RAG Systems is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Searches public Hacker News stories and discussions specifically about search, retrieval, and RAG (Retrieval-Augmented Generation) systems, returning titles, links, scores, authors, and timestamps.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-next-community-search-and-retrieval-builders?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hacker-news-discussion-search-search-retrieval-rag-systems-dd5ab0bf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g2B9RnzPZMdMkKTKE-rlf

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 hacker-news-discussion-search-search-retrieval-rag-systems-dd5ab0bf -d '<json body>'
```

Example prompt: Search Hacker News for the top 5 discussions about RAG systems and retrieval pipelines and show me the titles, scores, and links.

## When to prefer this

Choose this endpoint when you specifically want to surface community discussion and sentiment from Hacker News on search, retrieval, and RAG-related topics. It is narrowly scoped to that subject area, making it ideal for developer research, newsletter curation, or competitive intelligence in the AI search/retrieval space — not for general web search or other HN topic areas.

## Known failure modes

- Query returns no results if the topic is too niche or the HN index lacks coverage
- max_results exceeding 10 will be clamped or rejected
- Network or upstream HN API errors may return empty results or a timeout
- Broad or ambiguous queries may return loosely related stories

## How this service works

Hacker News discussion search: search, retrieval, and RAG systems: Search public Hacker News stories for search, retrieval, and RAG systems. Returns story titles, links, scores, authors, and timestamps.

## Output

Returns a list of Hacker News stories matching the query, each including the story title, URL, HN score (upvotes), author username, and timestamp — up to the requested number of results (max 10).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "default": "search, retrieval, and RAG systems Software builders",
   "description": "Optional focused search query."
  },
  "max_results": {
   "type": "integer",
   "default": 5,
   "maximum": 10,
   "minimum": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hacker-news-discussion-search-search-retrieval-rag-systems-dd5ab0bf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)