# DDG HN Search

> DDG HN Search is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Search Hacker News stories and discussions via a machine-payable POST endpoint, returning bounded results for $0.01 USDC per call

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/hn-search?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-hn-search-ffc7f0cf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5k70o-CJU7dJZQybNpGll

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 ddg-hn-search-ffc7f0cf -d '<json body>'
```

Example prompt: Search Hacker News for recent discussions about Rust programming language and give me the top results including titles, scores, and links.

## When to prefer this

Choose this endpoint when you need to search Hacker News specifically — useful for developer-focused community sentiment, tech trend discovery, startup reputation research, or finding curated technical discussions. Prefer this over generic web search when the target audience is developers or technical founders and HN community opinion is what matters. The $0.01 USDC micro-payment via x402 makes it suitable for automated agent pipelines that need programmatic, bounded HN search without scraping.

## Known failure modes

- Empty result set if query matches no HN content
- Payment failure or 402 response if USDC balance is insufficient or x402 rails are misconfigured
- Malformed request body returns validation error
- Network timeout if upstream HN search index is slow
- Rate limiting if too many calls are made in quick succession

## How this service works

Machine-payable DDG services for AI agents. Current public live payment rails are x402 multi-chain USDC and direct-crypto auto/manual for public receiving-address families. MPP/Stripe/Tempo is installed but pending live provider env plus penny-settlement proof before any MPP-live advertisement. DDG sells bounded artifacts/results, not raw provider account access.

## Output

A JSON response with ok:true plus a collection of matched Hacker News items, typically including story titles, URLs, scores, comment counts, submission timestamps, and author usernames, bounded to the query result set.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": true
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "ok": true
    }
   },
   "additionalProperties": true
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ddg-hn-search-ffc7f0cf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.daedalusdevelopmentgroup.com](https://www.zero.xyz/host/agents.daedalusdevelopmentgroup.com/llms.txt)