# SignalDesk AI – Hacker News Search

> SignalDesk AI – Hacker News Search is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).

Searches Hacker News posts and returns ranked results with scores, titles, and metadata for a given query and time window

## Facts

- Endpoint: GET https://x402-agent.kariguetoazul.workers.dev/api/hn?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-hacker-news-search-e4d5c34e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h6h6BQ0quZIBwtKCtNJbB

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 signaldesk-ai-hacker-news-search-e4d5c34e
```

Example prompt: Search Hacker News for posts about 'WebAssembly' from the past week and show me the top results with their scores.

## When to prefer this

Choose this endpoint when you need to search and retrieve ranked Hacker News stories by keyword with a configurable time window (day/week/year). It is well-suited for agents doing tech trend research, developer sentiment analysis, or monitoring community discussions on HN at low cost ($0.002 per call). Prefer it over general web search when you specifically want HN community signal with upvote scores.

## Known failure modes

- Missing required 'q' query parameter returns a 4xx validation error
- Invalid 'window' enum value (not dia/semana/ano) may cause a 400 bad request
- Payment not included or insufficient USDC causes a 402 Payment Required response
- No results found for obscure or misspelled query terms returns total: 0 with empty results array
- Cloudflare Worker quota exhaustion may return 503 or timeout

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

A JSON object containing the total number of matching results, the echoed search query, and an array of result items each with a story title and point score (pontos).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "Search terms, e.g. rust"
      },
      "window": {
       "enum": [
        "dia",
        "semana",
        "ano"
       ],
       "type": "string",
       "description": "Time window"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "total": 42,
  "consulta": "rust",
  "resultados": [
   {
    "pontos": 320,
    "titulo": "..."
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-hacker-news-search-e4d5c34e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)