# News Brief by Topic

> News Brief by Topic is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.052/call, status unknown (last checked 2026-10-31).

Returns a summarized news brief for a given topic, optionally filtered by region and freshness, by reading multiple news articles.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/news/brief?utm_source=zero.xyz
- Price: $0.052/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/news-brief-by-topic-1520b58c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7qMuF49wpLlb2rXYCNE_1

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 news-brief-by-topic-1520b58c
```

Example prompt: Give me a news brief on artificial intelligence regulation in the US for the past week, pulling from up to 5 sources.

## When to prefer this

Choose this endpoint when you need a synthesized, multi-source news brief on a specific topic rather than a single article or raw search results. It is well-suited for agents that need a quick, readable summary of recent coverage rather than raw links or headlines. Prefer it over generic web search when the goal is a coherent briefing rather than a list of URLs.

## Known failure modes

- Missing required 'topic' parameter returns an error
- Invalid region locale may fall back to us-en default or error
- No articles found for a very narrow or obscure topic
- Timelimit filter 'd' (past day) may return few or no results for niche topics
- Upstream article fetch failures may reduce source count below requested max

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

A JSON object with a success flag and a result containing a summarized news brief synthesized from multiple read articles on the requested topic, reflecting the specified region and freshness filter.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "topic"
     ],
     "properties": {
      "query": {
       "type": "string",
       "default": null,
       "description": "Alias for topic (either is accepted)"
      },
      "topic": {
       "type": "string",
       "default": null,
       "description": "The topic to brief on"
      },
      "region": {
       "type": "string",
       "default": null,
       "description": "Locale like 'us-en', 'uk-en' (default us-en)"
      },
      "timelimit": {
       "enum": [
        "d",
        "w",
        "m",
        "y"
       ],
       "type": "string",
       "default": null,
       "description": "Freshness filter (default w = past week)"
      },
      "max_sources": {
       "type": "integer",
       "default": null,
       "maximum": 10,
       "minimum": 1,
       "description": "How many articles to read (default 5)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/news-brief-by-topic-1520b58c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)