---
title: "Ask Claude Pro (Sonnet, flat price) ($0.050/call)"
method: POST
path: "/ask-pro"
tags: ["llm", "claude", "sonnet", "completion", "inference", "ai", "reasoning", "analysis", "flat-price"]
---

# Ask Claude Pro (Sonnet, flat price) ($0.050/call)

`POST /ask-pro`

## Request

- Base URL: `https://x402.shizu.me`
- URL: `https://x402.shizu.me/ask-pro`
- Auth: none declared

Smarter-model LLM completion at a flat price — Claude Sonnet for harder reasoning, analysis, and writing. Same simple contract as /ask: body {prompt (required), system?, max_tokens? (<=512), temperature?}; prompt up to 5000 utf-8 bytes. Stateless; prompts never logged. Returns {model, text, stop_reason, usage}.

Paid endpoint: $0.050 per call via the x402 protocol (USDC on Base). An unpaid request returns 402 with payment requirements in the PAYMENT-REQUIRED response header; attach payment and retry.

## Response `200`

Paid result (JSON)

## Other responses

- `402`: Payment required — x402 requirements in the PAYMENT-REQUIRED response header

---

[API](https://skmtc.dev/shizu/apis/scrape402.md) · [All operations](https://skmtc.dev/shizu/apis/scrape402/llms.txt) · [OpenAPI document](https://skmtc.dev/shizu/apis/scrape402/revisions/0852d74798b8?raw)