# research.topic-deep-researcher

> research.topic-deep-researcher is a paid API for AI agents from api.craigmbrown.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Generates a multi-source, citation-backed deep-dive research report on any topic, drawing from web and academic sources with resolvable references for every claim.

## Facts

- Endpoint: POST https://api.craigmbrown.com/v1/services/research.topic-deep-researcher
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/research-topic-deep-researcher-138c8e96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HM28AhrxbTdsYN1Cz81RX

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-topic-deep-researcher-138c8e96 -d '<json body>'
```

Example prompt: Can you do a thorough deep-dive research report on the long-term health effects of microplastics in the human body, with cited sources for every major claim and concrete recommendations?

## When to prefer this

Choose this endpoint when you need a rigorous, multi-source research report with every claim traceable to a citation — not just a quick news scan or a video-based summary. It is preferable over research.topic-news-scanner when depth and academic sourcing matter more than speed, and over content.youtube-research when the source pool needs to include web and academic publications rather than video content alone. Best suited for due diligence, policy research, academic briefings, or any context where unsourced assertions are unacceptable.

## Known failure modes

- Vague or overly broad prompt may result in shallow or unfocused findings
- Topic with no substantial web or academic coverage may yield sparse citations
- Malformed JSON input or missing prompt field returns an error
- Rate limiting or payment failure may prevent report generation
- Highly niche or proprietary topics may lack publicly resolvable sources

## How this service works

Multi-source research report with academic-grade sourcing — every claim carries a resolvable citation, not a bare assertion. Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). Broader source pool than content.youtube-research (web + academic vs. video-only); the deep-dive tier above research.topic-news-scanner's fast scan.

## Output

Returns a JSON object containing a written summary of the topic, an array of specific findings each backed by resolvable citations, and an array of recommendations derived from the research. The response also carries settlement proof metadata (ProofOfSettledOutcome kind 30120) confirming the outcome was recorded.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "prompt": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "schema": {
  "type": "object",
  "properties": {
   "summary": {
    "type": "string"
   },
   "findings": {
    "type": "array",
    "items": {
     "type": "string"
    }
   },
   "recommendations": {
    "type": "array",
    "items": {
     "type": "string"
    }
   }
  }
 },
 "example": {
  "summary": "..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/research-topic-deep-researcher-138c8e96/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.craigmbrown.com](https://www.zero.xyz/host/api.craigmbrown.com/llms.txt)