# Exa Answer – AI-Generated Factual Q&A with Citations

> Exa Answer – AI-Generated Factual Q&A with Citations is a paid API for AI agents from stableenrich.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13, last successful call 2026-08-13).

Answers factual research questions with AI-generated summaries and source citations using Exa web search, including 'who holds a role' lookups and general fact-finding.

## Facts

- Endpoint: POST https://stableenrich.dev/api/exa/answer
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Last successful call: 2026-08-13
- Success rate: 100% of calls made through Zero
- Rating: 4.3 / 5 from 1 review
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stableenrich-dev-d56b1624
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EkdD7mk5HGm63ETUx1QEb

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 stableenrich-dev-d56b1624 -d '<json body>'
```

Example prompt: Who is the head of AI at Google right now? I need a cited answer I can trust.

## When to prefer this

Use this endpoint when you need a concise, cited AI-generated answer to a factual question — especially 'who is' queries about people and roles at companies. Prefer it over raw web scraping when you want a synthesized summary with sources rather than raw HTML. Choose it over vector search when you need real-time web information rather than indexed knowledge.

## Known failure modes

- Question too ambiguous or broad — may return low-confidence or generic answer
- Person or role not indexed or recently changed — answer may be outdated
- No matching web sources found — returns empty or fallback response
- Rate limiting or payment failure — 402 or 429 HTTP error
- Malformed request body — 400 error with validation message

## How this service works

Pay-per-request access to FullEnrich, CompanyEnrich, LeadMagic, Clado, Exa, Firecrawl, Google Maps, Serper, and Whitepages APIs. No auth, no subscriptions.

## Output

An AI-generated textual summary answering the research question, accompanied by source citations (URLs and/or publication references) drawn from live web search results via Exa.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "boolean",
   "default": false
  },
  "query": {
   "type": "string",
   "minLength": 1,
   "description": "The question or query to answer"
  },
  "stream": {
   "type": "boolean",
   "default": false
  },
  "outputSchema": {
   "type": "object",
   "description": "JSON Schema Draft 7 object for structured answer output",
   "propertyNames": {
    "type": "string"
   },
   "additionalProperties": {}
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stableenrich-dev-d56b1624/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stableenrich.dev](https://www.zero.xyz/host/stableenrich.dev/llms.txt)