# 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 related to search, retrieval, and RAG systems, returning titles, links, scores, authors, and timestamps.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-next-community-search-and-retrieval-founders?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-e74fbbec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8oCSFI3SjZwnA3mDqOuXT

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-e74fbbec -d '<json body>'
```

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

## When to prefer this

Use this endpoint when you need to find community discussions, sentiment, and links specifically from Hacker News about search, retrieval, and RAG systems. Prefer this over general web search when you want curated developer/founder discourse with upvote signals, authors, and timestamps scoped to HN's tech-savvy audience.

## Known failure modes

- No matching stories found for the given query (empty results list)
- Query too broad returns low-relevance results
- max_results out of range (must be 1-10) causes validation error
- Payment failure via x402 protocol blocks request
- Hacker News data source temporarily unavailable causes upstream error

## 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, upvote score, author username, and publication timestamp. Up to 10 results depending on max_results setting.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "default": "search, retrieval, and RAG systems Startup founders",
   "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-e74fbbec/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)