# Exa Answer

> Exa Answer is a paid API for AI agents from StableEnrich at stableenrich.dev, paid per call via MPP or x402, $0.01/call, status unknown (last checked 2026-10-10, last successful call 2026-08-27).

Returns an AI-generated answer with cited web sources for a given question or query

## Facts

- Endpoint: POST https://stableenrich.dev/api/exa/answer?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP, x402
- Status: unknown
- Last checked: 2026-10-10
- Last successful call: 2026-08-27
- Success rate: 89% of calls made through Zero
- Rating: 3.3 / 5 from 1 review
- Activations on Zero: 9
- Provider: StableEnrich
- Docs: https://stableenrich.dev
- Website: https://stableenrich.dev
- Tags: apollo, exa, firecrawl, google-maps, linkedin, reddit, enrichment, research, data, search, social
- Canonical page: https://www.zero.xyz/c/stableenrich-answer-6e758e60
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D91pRvl4EUJRPlTlp7I8Y

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-answer-6e758e60 -d '<json body>'
```

Example prompt: What are the main causes of the 2008 financial crisis? I need a thorough answer with citations so I can verify the sources.

## When to prefer this

Use this endpoint when you need a concise, AI-generated answer to a specific question that is grounded in real web sources with verifiable citations. Prefer it over a raw search endpoint when you want synthesis rather than a list of links, and over a scraping endpoint when you want question-answering rather than raw page content. Ideal for research, fact-checking with sources, or any task where the agent needs both an answer and the evidence behind it.

## Known failure modes

- Empty or missing query returns 400 validation error
- Query too vague or unanswerable may return a low-confidence or empty answer
- Network timeout if upstream Exa service is unavailable
- Payment failure if USDC balance is insufficient
- Citations array may be empty if no relevant sources are found
- Rate limiting if too many requests are made in quick succession

## How this service works

Exa Answer - Get AI-generated answers with citations

## Output

Returns a JSON object containing a synthesized AI-generated answer string, an array of citation objects (each with URL, title, text snippet, author, published date, favicon, and image), and a cost breakdown object with total dollar amount.

## Example request

```json
{
 "query": "What are the main benefits of renewable energy sources?"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "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": {}
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "answer"
 ],
 "properties": {
  "answer": {
   "anyOf": [
    {
     "type": "string"
    },
    {
     "type": "object",
     "propertyNames": {
      "type": "string"
     },
     "additionalProperties": {}
    }
   ],
   "description": "The generated answer based on search results"
  },
  "citations": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "id": {
      "type": "string"
     },
     "url": {
      "type": "string"
     },
     "text": {
      "type": "string"
     },
     "image": {
      "type": "string"
     },
     "title": {
      "type": "string"
     },
     "author": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     },
     "favicon": {
      "type": "string"
     },
     "publishedDate": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "null"
       }
      ]
     }
    },
    "additionalProperties": false
   }
  },
  "costDollars": {
   "type": "object",
   "properties": {
    "total": {
     "type": "number"
    }
   },
   "additionalProperties": false
  }
 },
 "additionalProperties": false
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stableenrich-answer-6e758e60/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)