> Source: https://ashareapi.com/en/docs/endpoints/challenge/  ·  Markdown version for LLMs / AI agents

Free endpoint · Free

# 获取 PoW 挑战（匿名提额用） API
 匿名请求超限（429）时也会直接返回同一份挑战。解出 nonce 后带 `X-PoW: <challenge>.<nonce>` 请求，匿名配额从 5 次/分提升到 60 次/分。⚠️ 只提升每分钟次数，不提升每日条数（匿名每日最多取 10 万条）。付费 Key 用户无需使用。
 Free `GET /v1/challenge`
 Signature
```
GET /v1/challenge?difficulty=0
```
 One-liner

```
curl "https://api.ashareapi.com/v1/challenge?difficulty=0"
```
 Parameters: `difficulty` * = required

## Quick start
 Replace the key below with yours (free endpoints need no key):
 curl

```
# 免费端点：无需 API Key（匿名即可调用）
curl "https://api.ashareapi.com/v1/challenge?difficulty=0"
```
 Python

```
import requests

r = requests.get(
 "https://api.ashareapi.com/v1/challenge",
 params={},
 timeout=30,
)
print(r.json())
```
 JavaScript

```
const r = await fetch("https://api.ashareapi.com/v1/challenge?difficulty=0");
console.log(await r.json());
```

## Parameters
 |
| | Parameter | Type | Required | Description

| | difficulty | integer | No | 自定义难度（前导 0 位数），0=服务端默认

 `difficulty` integer
 自定义难度（前导 0 位数），0=服务端默认

 Response
 Unified envelope: `{ ok, endpoint, tier, elapsed_ms, source, data }`
 Rows live in `data`; when upstream returns nothing you get `ok:false` and **the call is not counted**.

 Rate limits & quota
 Free endpoints need no key (anonymous 5/min — 250 bars per request, 100k rows per day; solve one PoW challenge for 60/min). Paid tiers: Trial 30 · Standard 120 · Pro 300 · Unlimited 600 per minute; buyout packs are capped by total calls and never expire.
[See the error code table →](/en/docs/errors)

## FAQ

### General (applies to every endpoint)
 Do these endpoints need an API key?
 **Free endpoints do not**: health, challenge, quote, kline, hot, market-overview and changedist work anonymously. **Paid endpoints do**: send `Authorization: Bearer `. ⚠️ The anonymous allowance is **tiered by caller type**: browsers (humans) get **5/min**; scripts, SDKs and AI Agents (curl, requests, axios, openai user-agent strings) get **2/min** — automated traffic is easier to abuse. Solving one PoW challenge (`GET /v1/challenge`, then send the `X-PoW` header) raises it to **60/min** regardless of type. ⚠️ Also, anonymous calls are capped at **250 bars per request and 100k rows per day** — use an API key for the full 1212 bars or unlimited daily volume.

 Am I charged when the upstream returns nothing or errors?
 **No.** When the upstream fails or returns nothing you get `ok:false` and the charge for that call is **refunded** (total_calls / usage_log / ep_log are rolled back together). Only calls that actually returned data count.

 How fresh is the data?
 Quotes (quote / kline / orderbook / changedist) are **real-time or current session**; financials, shareholders, dividends and events are **within T+1 of upstream disclosure**. The `source` field in every response tells you which data channel actually served it.

 Can I request several stocks in one call?
 **No.** `code` is a single-value parameter — one stock per call. For batches, issue concurrent calls and respect your tier per-minute limit.

 How do I use this from Claude / Cursor / ChatGPT?
 Set up MCP once, then just ask the AI — it calls the endpoint itself. MCP exposes 24 tools covering quotes, financials, screening, sectors and macro.

## Related endpoints
 [Health check](/en/docs/endpoints/health)[Real-time quote](/en/docs/endpoints/quote)[K-line (D/W/M)](/en/docs/endpoints/kline)[Hot list](/en/docs/endpoints/hot)[Market overview](/en/docs/endpoints/market-overview)[Up/down distribution](/en/docs/endpoints/changedist)

 Use it from an AI Agent?
 Set up MCP once, then just ask the AI — it calls the endpoint itself.

 [MCP setup](/en/mcp)[Pricing](/en/pricing)

 [← Back to the full endpoint reference](/en/endpoints)