# Wolfram|Alpha Spoken Answer via Locus x402

> Wolfram|Alpha Spoken Answer via Locus x402 is a paid API for AI agents from wolframalpha.x402.paywithlocus.com, paid per call via x402, $0.055/call, status unknown (last checked 2026-10-13).

Sends a natural language query to Wolfram|Alpha and returns the answer as a spoken/audio-optimized text string, paid per-call via x402 micropayment.

## Facts

- Endpoint: POST https://wolframalpha.x402.paywithlocus.com/wolframalpha/spoken?utm_source=zero.xyz
- Price: $0.055/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wolfram-alpha-spoken-answer-via-locus-x402-8b7ffaab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KiIGr5kF_jh2_q8_zpjXP

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 wolfram-alpha-spoken-answer-via-locus-x402-8b7ffaab -d '<json body>'
```

Example prompt: Ask Wolfram|Alpha what the spoken answer is to 'how many calories are in 200 grams of brown rice' and give me the result in metric units.

## When to prefer this

Choose this endpoint when you need a concise, spoken-optimized answer to a factual or computational query — especially for voice assistants, audio pipelines, or LLM reasoning chains where a brief natural-language answer string is preferable over raw structured data. Prefer this over the full/structured Wolfram|Alpha endpoints when you only need the spoken answer text and want minimal payload size. Use the x402 micropayment model when you need pay-per-query billing without API key subscriptions.

## Known failure modes

- Query is ambiguous or unrecognized by Wolfram|Alpha — returns empty or no-result data
- Timeout exceeded — if computation exceeds the specified timeout seconds, may return partial or no result
- Payment failure — x402 micropayment not authorized, request rejected before processing
- Invalid units value — only 'metric' or 'imperial' accepted; other strings may cause unexpected behavior
- Network/service unavailability — upstream Wolfram|Alpha API unreachable

## How this service works

Computational knowledge engine — math, science, geography, history, nutrition, finance, and more. Get answers as text, spoken audio, LLM-optimized data, or full structured results.

## Output

Returns a JSON object containing a 'data' field with the spoken-form answer text optimized for voice or LLM consumption, along with payment settlement details (settled and authorized USDC amounts) and a unique request ID with a status URL for tracking.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "i": {
   "type": "string"
  },
  "units": {
   "type": "string"
  },
  "timeout": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "payment": {
   "scheme": "exact",
   "settledUsdc": "0.001000",
   "authorizedMaxUsdc": "0.001000"
  },
  "request": {
   "id": "00000000-0000-4000-8000-000000000000",
   "statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
  },
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wolfram-alpha-spoken-answer-via-locus-x402-8b7ffaab/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from wolframalpha.x402.paywithlocus.com](https://www.zero.xyz/host/wolframalpha.x402.paywithlocus.com/llms.txt)