Choose a Free Real-Time
Options Data API如何选择
免费实时期权数据 API
Separate truly live feeds from delayed or trial access, then compare chains, quotes, Greeks, limits, entitlements, and licensing.
先区分真正的实时行情、延迟数据与限时试用，再比较期权链、报价、
希腊值、调用限额、行情权限与许可条款。
TL;DR核心摘要
Free real-time options data exists mainly through broker entitlements, small quotas, trials, or tightly limited symbol coverage.
Check exchange timestamps and measured arrival time. A real-time label may still exclude OPRA quotes or require an account.
Reference data, snapshots, streaming quotes, trades, daily volume, open interest, and vendor Greeks run on different clocks.
Storage, non-display use, multiple users, derived data, and redistribution can require rights beyond an API subscription.
免费实时期权数据通常来自券商账户附带的行情权限、较低的调用额度、限时试用或有限的标的覆盖范围。
应同时核对交易所时间戳与数据的实际接收时间。即使标注为“实时”，服务也可能不提供 OPRA 报价，或要求用户先开通账户。
参考数据、快照、流式报价、成交、日度成交量、未平仓量和供应商希腊值采用不同的更新时间口径。
数据存储、非展示用途、多用户访问、衍生数据和再分发，可能需要 API 订阅之外的额外权利。
What “real-time options data” must include“实时期权数据”应包含哪些内容
Options data is not one dataset. A useful evaluation separates reference data, chain snapshots, market quotes, calculated analytics, and historical records. A provider may offer one category free while charging for another.
期权数据并不是单一的数据集。选型评估时，应分别考察参考数据、期权链快照、市场报价、计算生成的分析指标和历史记录。服务商可能免费提供其中一类数据，却对另一类收费。
Underlying symbol, expiration, strike, call or put, contract identifier, exchange, and exercise style form the base schema.
Bid, ask, midpoint, last trade, volume, and open interest may be real-time, delayed, end-of-day, or absent.
Delta, gamma, theta, vega, rho, and IV may be vendor-calculated; confirm methodology and timestamp semantics.
A real-time stream should identify contract, event type, source timestamp, receipt time, sequence or ordering key, venue or feed, and quote or trade condition.
A snapshot endpoint needs pagination, explicit completion state, contract counts, and field-level timestamps. Fast delivery does not make a partial chain complete.
Volume may be session cumulative and open interest commonly belongs to a prior clearing cycle. Preserve their as-of dates instead of assigning the quote timestamp.
标的代码、到期日、行权价、看涨或看跌类型、合约标识、交易所及行权方式共同构成基础数据结构。
买价、卖价、中间价、最新成交价、成交量和未平仓量可能是实时、延迟或日终数据，也可能完全不提供。
Delta、Gamma、Theta、Vega、Rho 和 IV 可能由服务商自行计算，因此需要确认其计算方法和时间戳含义。
实时数据流应包含合约、事件类型、源时间、接收时间、序列或排序键、交易所或数据源，以及报价或成交状态。
快照接口应提供分页、明确完成状态、合约数量和字段级时间戳。返回速度快并不代表残缺期权链就是完整数据。
成交量可能是当日累计值，未平仓量通常属于上一轮清算。应保留各自截至日期，不能把报价时间套在这些字段上。
Where free real-time options APIs come from免费实时期权 API 通常来自哪里
| Source type来源类型 | Typical free access通常可免费获取的内容 | Best for适用场景 | Watch for注意事项 |
|---|---|---|---|
| Broker API券商 API | Current chains and account-linked market data.最新期权链，以及账户权限范围内的行情数据。 | Trading apps and personal workflows.交易应用与个人工作流。 | Account, entitlement, and redistribution limits.账户要求、行情访问权限与数据再分发限制。 |
| Market data vendor行情数据供应商 | Trial or capped chains, quotes, and analytics.试用期内或限额提供的期权链、报价及分析指标。 | Structured prototypes and vendor evaluation.结构化数据应用的原型开发与供应商评估。 | Credits, exchange fees, and delayed data.调用额度、交易所费用与延迟行情。 |
| Exchange or regulator交易所或监管机构 | Reference files, delayed summaries, or reports.参考文件、延时汇总数据或报告。 | Validation and official definitions.数据核验与官方定义查询。 | Often not a developer-ready full chain API.通常不提供可供开发者直接调用的完整期权链 API。 |
| Community library社区工具库 | Convenient wrappers around public endpoints.对公开接口的便捷封装。 | Exploration, education, and notebooks.数据探索、教学及交互式笔记本分析。 | Unofficial endpoints and breaking changes.依赖非官方接口，接口变更可能引发兼容性问题。 |
Free real-time options data API checklist免费实时期权数据 API 选型核查清单
Test liquid, illiquid, weekly, long-dated, index, and multi-listed contracts that resemble your workload.
Record source timestamps and arrival times. “Real-time” can depend on exchange entitlements and account status.
One chain can require many contract or quote requests. Convert the advertised limit into chains per minute and per day.
Disconnect a stream, reconnect, and determine whether events can be replayed. Detect gaps, duplicates, out-of-order updates, and subscription acknowledgements.
Track source-to-provider, provider-to-client, and processing delay separately across open, midday, close, and busy market events.
Include a thin strike, weekly expiry, long-dated contract, index option, and adjusted contract—not only one liquid equity option.
On entitlement failure, rate limit, partial snapshot, or stale stream, retain the last valid state, expose its age, and stop execution-dependent actions.
测试时应选择能代表实际工作负载的合约，包括高流动性与低流动性合约、周度合约、长期限合约、指数期权，以及在多个交易所挂牌的合约。
同时记录数据源时间戳和本地接收时间。“实时”数据能否获取，可能取决于交易所行情授权和账户状态。
获取一条完整期权链可能需要发起多次合约信息或报价请求，因此应将公布的调用上限换算为每分钟和每天可获取的完整期权链数量。
主动断开并重连数据流，确认事件是否可回放，并检测数据缺口、重复、乱序更新和订阅确认。
在开盘、午间、收盘和市场繁忙事件期间，分别测量源到供应商、供应商到客户端和本地处理延迟。
除流动性较好的股票期权外，还要覆盖成交稀疏行权价、周度到期、远期合约、指数期权和调整后合约。
遇到权限失败、限流、快照不完整或数据流陈旧时，应保留最后有效状态并显示其年龄，同时停止依赖实时数据的执行动作。
Use QVeris to discover options data capabilities使用 QVeris 查找期权数据能力
The exact QVeris Realtime Options Tool is the strongest verified match. Review the Alpha Vantage Provider profile and test one known contract before assuming live entitlement, consolidated coverage, stream semantics, or production rights.
已核实的最强相关入口是 QVeris Realtime Options 工具。先查看 Alpha Vantage Provider 页面并测试一份已知合约，不能直接假定实时权限、综合市场覆盖、流式语义或生产使用权利。
- Inspect symbol, contract, data-format, and optional Greeks parameters before calling.
- Record the tool ID, request, raw response, retrieval time, source timestamps, and entitlement result.
- Treat the tool result as a capability probe; verify streaming, full-chain, and redistribution needs separately.
- 调用前检查标的、合约、数据格式和可选希腊值参数。
- 记录工具 ID、请求、原始响应、抓取时间、源时间戳和权限校验结果。
- 把工具结果视为能力探测；流式接入、完整期权链和再分发需求仍需单独核实。
FAQ常见问题
Unrestricted real-time exchange data is uncommon. Free access often requires an account, carries delays, or has tight quotas and usage terms.
Some do, but calculations and timestamps vary. Verify the model inputs, risk-free rate, dividend assumptions, and update frequency.
Only if source timestamps, entitlement, feed coverage, and measured arrival latency support that claim. HTTP speed alone is insufficient.
REST suits occasional snapshots; streaming suits frequent state changes. The correct choice depends on cadence, recovery, ordering, quotas, and license.
不受任何限制的交易所实时行情并不常见。免费访问通常需要注册账户，也可能仅提供延迟行情，或受到严格的调用额度和使用条款限制。
部分免费 API 可以提供，但计算方法和时间戳定义因服务商而异。应核对模型输入、无风险利率、股息假设和更新频率。
只有源时间戳、数据权限、行情覆盖和实测接收延迟共同支持时才算。HTTP 响应速度本身不能证明实时。
REST 适合偶发快照，流式接口适合频繁状态变化。选择取决于刷新频率、恢复、排序、额度和许可。
References and next steps参考资料与下一步
Alpha Vantage realtime options
Alpaca options data
Polygon options API
Cboe options statistics