# Research Dossier by Topic

> Research Dossier by Topic is a paid API for AI agents from predator-ubuntu.taild9a745.ts.net, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-18).

Returns a curated research dossier on a specified topic, including structured content such as a title and topic slug.

## Facts

- Endpoint: GET https://predator-ubuntu.taild9a745.ts.net/v1/dossiers/%7Btopic%7D?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/research-dossier-by-topic-abf8d9a9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VA4DB-wq6Wq39iFZ8R9Sh

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 research-dossier-by-topic-abf8d9a9
```

Example prompt: Can you pull up a curated research dossier on 'base-gas-fees-explained' for me? I need a structured brief I can use for background research.

## When to prefer this

Choose this endpoint when you need a pre-curated, structured research brief on a topic rather than raw web search results or article extraction. Ideal for AI agents that need reliable background knowledge on a subject without performing their own research pipeline. Prefer this over URL extraction when you want synthesized dossier content rather than raw page text, and over a general search when you want a curated, structured output.

## Known failure modes

- Topic slug not found — returns an error or empty result if the topic doesn't exist in the dossier catalog
- Malformed topic slug — URL encoding issues or invalid characters may cause a 400-level error
- Payment failure — if x402/USDC payment on Base is not completed, the request is rejected
- Rate limiting — excessive calls may be throttled

## How this service works

Paid microservices for AI agents: data snapshots, utilities, URL extraction, batch queries, research dossiers. x402/USDC on Base.

## Output

Returns a structured dossier object containing a title and topic slug, along with curated research content on the requested subject. Useful as a knowledge brief for AI agents or human researchers needing background on a specific topic.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "title": "Base gas fees, explained",
  "topic": "base-gas-fees-explained"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/research-dossier-by-topic-abf8d9a9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from predator-ubuntu.taild9a745.ts.net](https://www.zero.xyz/host/predator-ubuntu.taild9a745.ts.net/llms.txt)