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

> Hacker News Discussion Search: Search, Retrieval, and 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 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-researchers?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-and-rag-systems-9552bfc3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gyLLrhJZ7lYEQ8JrMktj5

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-and-rag-systems-9552bfc3 -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you specifically need Hacker News community discussions about search, retrieval, and RAG systems. It is ideal for gauging developer sentiment, finding relevant community threads, or tracking what practitioners are discussing about search infrastructure and AI retrieval pipelines. Prefer this over general web search when you want the technical HN audience's perspective specifically.

## Known failure modes

- No matching stories found for the query — returns empty results list
- Query too vague returns off-topic stories
- max_results out of range (must be 1–10) causes validation error
- Network timeout or upstream HN API unavailability
- Payment of $0.01 USDC not settled, resulting in 402 response

## 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 link, score (upvotes), author username, and timestamp of publication. Results are limited to between 1 and 10 stories per call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "default": "search, retrieval, and RAG systems Research teams",
   "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-and-rag-systems-9552bfc3/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)