# 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 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-product?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-214b5976
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Fb5MEoRDUQSh9bzIStNQ3

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-214b5976 -d '<json body>'
```

Example prompt: Search Hacker News for the top 5 discussions about RAG systems and retrieval pipelines so I can see what the developer community is saying about them.

## When to prefer this

Choose this endpoint when you need to quickly surface what the Hacker News developer community is currently discussing about search, retrieval, or RAG systems — especially useful for competitive research, trend spotting, or gauging practitioner sentiment without manually browsing HN. It is pre-scoped to the search/retrieval/RAG domain, making it more targeted than a general HN search API.

## Known failure modes

- No results found for highly specific or uncommon query terms
- Payment failure if USDC balance is insufficient (x402 protocol)
- Rate limiting or timeout if the upstream Hacker News data source is slow
- max_results out of range (must be 1-10) returns validation 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 up to 10 Hacker News stories matching the query, each including the story title, URL link to the HN post, community score (upvotes), author username, and publication timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "default": "search, retrieval, and RAG systems Product 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-214b5976/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)