Find a Free Options Greeks API
and Verify the Numbers选择免费期权希腊值 API
并验证计算结果
Compare delta, gamma, theta, vega, and rho coverage—then verify model inputs, timestamps, limits, licensing, and reproducibility.
比较 Delta、Gamma、Theta、Vega 与 Rho 覆盖，
并核对模型输入、时间戳、限额、授权与可复现性。
Quick Summary快速摘要
Typical entry plans expose option chains, contract quotes, expirations, strikes, volume, open interest, and sometimes Greeks or implied volatility.
Check quote delay, venue coverage, request limits, contract history, Greeks methodology, redistribution rights, and commercial-use terms.
Identical contracts can have different Greeks when providers use different prices, rates, dividends, clocks, or numerical methods.
Compare one liquid contract across two timestamps and recompute a small tolerance check from the same underlying and option prices.
入门套餐一般提供期权链、合约报价、到期日、行权价、成交量和未平仓量，有时还包括希腊值或隐含波动率。
确认报价延迟、交易场所覆盖范围、请求限额、历史合约数据、希腊值计算方法、再分发权限和商业使用条款。
即使是同一合约，只要供应商采用的价格、利率、股息、时间口径或数值方法不同，希腊值就可能不同。
选择一份流动性较好的合约，在两个时点对比结果，并使用相同的标的与期权价格做一次容差范围内的复算。
Which Greeks should a free options API return?免费期权 API 应返回哪些希腊值？
Start with the sensitivity the application actually uses. A hedge monitor may need delta and gamma, a decay screen may focus on theta, and a volatility book may need vega plus implied volatility. Rho is often smaller for short-dated equity options but still belongs in a complete schema. Every value needs contract identity, units, sign convention, calculation time, and model lineage.
先明确应用真正需要哪一种敏感度。对冲监控可能关注 Delta 与 Gamma，时间价值衰减筛选可能以 Theta 为主，波动率组合则需要 Vega 和隐含波动率。Rho 对短期期权的影响通常较小，但完整结构仍应保留。每个数值都要带有合约身份、单位、正负号约定、计算时间和模型来源。
Approximate first-order option-price sensitivity to the underlying. Verify call and put sign conventions, premium adjustment, and whether the value is spot or forward delta.
Measures how delta changes as the underlying moves. Confirm the underlying-price unit and calculation scale before comparing contracts.
Measures time-decay sensitivity. Providers may report per day, per calendar day, per trading day, or annualized values; the unit must be explicit.
Vega depends on whether volatility changes are measured per one percentage point or a full decimal unit; rho has a similar basis-point versus unit-rate ambiguity.
Keep option price, synchronized underlying price, strike, time to expiration, rate, dividend or borrow assumption, exercise style, model name, and calculation timestamp.
近似衡量期权价格对标的价格变化的一阶敏感度。应核对认购与认沽的正负号、权利金是否经过调整，以及数值属于现货 Delta 还是远期 Delta。
衡量标的价格变化时 Delta 的变化速度。跨合约比较前，应明确标的价格单位和计算缩放方式。
衡量时间流逝带来的价值敏感度。供应商可能按每日、每个自然日、每个交易日或年化方式报告，单位必须明确。
Vega 可能按波动率变化一个百分点或一个完整小数单位计算；Rho 也存在按一个基点或一个利率单位报告的歧义。
应保存期权价格、同步标的价格、行权价、距到期时间、利率、股息或借券假设、行权方式、模型名称和计算时间。
Verify an options Greeks API before using it使用期权希腊值 API 前怎样验证
1. Lock one contract and one valuation clock1. 固定一份合约和一个估值时点
Choose a liquid near-the-money contract and record the exact option quote, underlying quote, timestamps, expiration, strike, side, multiplier, and market status. If the API accepts a contract identifier, use it; do not rely on a strike-only lookup.
选择一份流动性较好的近平值合约，记录准确的期权报价、标的报价、时间戳、到期日、行权价、方向、乘数和市场状态。如果 API 支持合约标识，应直接使用，不能只按行权价查询。
2. Discover units and conventions empirically2. 通过实测确认单位与约定
Change one input at a time or compare adjacent responses. A vega near 0.12 may mean a 0.12 price change for one volatility point, while another API can scale the same sensitivity by 100. Check theta time basis, delta sign, rho rate unit, and IV decimal versus percent.
每次只改变一个输入，或比较相邻响应。某个 API 的 Vega 0.12 可能代表波动率变化一个百分点时期权价格变化 0.12，而另一接口可能把同一敏感度放大 100 倍。还要核对 Theta 的时间基准、Delta 正负号、Rho 利率单位，以及 IV 使用小数还是百分比。
3. Recompute a tolerance check3. 在容差范围内复算
Use the provider's documented inputs where available and calculate the same contract with a known model. Exact equality is not required, but large unexplained differences should block mixing values. Test deep in-the-money, far out-of-the-money, near-expiry, and longer-dated contracts because numerical behavior changes at the edges.
在供应商公布输入的情况下，使用已知模型复算同一合约。结果不必完全相等，但若差异较大且无法解释，就不应混用。还要覆盖深度实值、深度虚值、临近到期和远期合约，因为模型在边界处的数值表现会变化。
4. Preserve lineage with every value4. 为每个数值保留来源链路
- Store provider, endpoint, contract ID, request parameters, response ID, and retrieval time.
- Keep model name, version, option-price input, underlying input, rate, dividends, and valuation time.
- Separate provider Greeks from locally calculated Greeks in different columns or tables.
- Version corrections instead of silently overwriting a historical calculation.
- Fail visibly when a required Greek disappears or changes unit.
- 保存供应商、接口、合约 ID、请求参数、响应 ID 和抓取时间。
- 保留模型名称与版本、期权价格输入、标的价格输入、利率、股息和估值时间。
- 供应商希腊值与本地计算希腊值应放在不同列或不同表中。
- 发生更正时新增版本，而不是悄悄覆盖历史计算。
- 必需希腊值消失或单位变化时，应明确使流程失败。
How free options Greeks APIs compare免费期权希腊值 API 的比较方法
No single source fits every options workflow. Exchange-backed resources are useful for authoritative contract and market-structure checks; vendor APIs normalize chains and analytics; broker APIs may expose entitled quotes for an account; downloadable datasets are convenient for repeatable research.
没有一种数据来源能够满足所有期权工作流。交易所相关资源适合核验权威的合约信息和市场结构；数据供应商 API 可提供标准化的期权链和分析指标；券商 API 可能向具备相应权限的账户提供行情；可下载数据集则便于开展可重复的研究。
| Source来源 | What it offers提供内容 | Best for适合场景 | Watch for注意事项 |
|---|---|---|---|
| Exchange-backed source交易所数据源 | Contract directories, delayed quotes, specifications, and market notices.合约清单、延迟行情、合约规范和市场公告。 | Verification and primary-source research.信息核验与一手资料研究。 | Data may be fragmented or subject to display terms.数据可能较为分散，并受行情展示条款约束。 |
| Free options-data API免费期权数据 API | Normalized chains, quotes, Greeks, IV, and selected history.标准化的期权链、报价、希腊值、隐含波动率和部分历史数据。 | Apps, agents, prototypes, and research pipelines.应用、智能体、原型和研究流程。 | Rate limits, delays, history gaps, and license restrictions.请求频率限制、数据延迟、历史数据缺口和许可限制。 |
| Broker API券商 API | Account-entitled quotes, positions, orders, and trading context.账户权限范围内的行情、持仓、订单及交易信息。 | Personal monitoring and execution workflows.个人行情监控与交易执行流程。 | Requires an eligible account; redistribution is usually restricted.通常需要符合条件的账户，且数据再分发会受到限制。 |
| Historical bulk dataset批量历史数据集 | Portable files containing expired contracts, quotes, trades, or analytics.便于下载和迁移的文件，包含已到期合约、行情、成交记录或分析指标。 | Notebooks, model research, and backtests.交互式笔记本分析、模型研究与回测。 | Free samples may cover only short periods or limited underlyings.免费样本可能只覆盖较短的时间范围或少量标的资产。 |
Compare sources with the same test set: one liquid near-the-money contract, one far expiration, one thinly traded strike, and one adjusted contract. Compare symbology, timestamps, bid/ask freshness, open interest date, Greeks methodology, missing contracts, and error messages. Identical field names do not guarantee identical calculations.
比较时不要只看功能清单，最好用同一组样本横向测试：一个流动性较高的平值合约、一个远月合约、一个交投清淡的行权价合约，以及一个条款经过调整的合约。重点对比合约代码、时间戳、买卖报价的时效、未平仓量对应的日期、希腊值计算方法、缺失合约和错误信息。字段名称相同，并不代表计算口径一致。
Use QVeris to find options data capabilities通过 QVeris 查找期权数据能力
The exact QVeris Realtime Options Tool is a strong match because its public record exposes an optional Greeks parameter. Review the Alpha Vantage Provider profile, then test one contract before assuming units, model inputs, history, or entitlement.
QVeris Realtime Options 工具与本页高度相关，因为其公开记录提供可选的希腊值参数。先查看 Alpha Vantage Provider 页面，再测试一份合约；不能直接假定单位、模型输入、历史能力或数据权限。
FAQ常见问题
Yes. Many providers offer free tiers for chains, Greeks, or historical contracts, usually with request limits, delayed data, or restricted exchange coverage.
Sometimes, but often they are delayed or limited to specific venues. Always inspect timestamps, entitlements, and exchange-coverage notes.
They can use different option prices, underlying clocks, rates, dividends, models, smoothing, and numerical conventions.
Yes, but keep the model, inputs, units, valuation time, and version. A local result is not directly comparable without aligned assumptions.
有。许多服务商为期权链、希腊值或历史期权合约数据提供免费套餐，但通常设有请求次数限制，数据也可能存在延迟，或仅覆盖部分交易所。
部分接口提供实时数据，但许多接口的数据存在延迟，或仅覆盖特定交易场所。务必查看时间戳、数据访问权限和交易所覆盖说明。
期权价格、标的行情时间、利率、股息、模型、平滑处理和数值约定都可能不同。
可以，但必须保存模型、输入、单位、估值时间和版本。假设未对齐时，本地结果不能直接与供应商数值比较。
References and next steps参考资料与下一步
Alpha Vantage options documentation
Polygon options API
Cboe delayed quotes