Compare financial data APIs for Gemini across market data, filings, macro coverage, freshness, licensing, and agent readiness.
从行情、监管文件、宏观覆盖、时效、许可和智能体适配度，对比适合 Gemini 的金融数据 API。
Start with Alpha Vantage or Twelve Data for broad prototypes. Choose Massive for deeper U.S. market data, Financial Modeling Prep for company fundamentals, Finnhub for mixed research feeds, Nasdaq Data Link for specialist datasets, Alpaca when market data sits beside a trading stack, FRED for U.S. macro series, and SEC EDGAR for authoritative U.S. filings. A production workflow often combines two sources rather than forcing one API to answer every question. Use one source for fast normalized retrieval and another for authoritative confirmation when the decision needs both speed and auditability. Document which source wins when values disagree, and never let Gemini silently merge conflicting timestamps or accounting definitions.广泛原型可从 Alpha Vantage 或 Twelve Data 起步；更深的美国行情可评估 Massive；公司基本面可看 Financial Modeling Prep；综合研究数据可看 Finnhub；专业数据集可用 Nasdaq Data Link；行情若紧邻交易栈可考虑 Alpaca；美国宏观序列优先 FRED；美国监管文件则以 SEC EDGAR 为一手来源。生产工作流通常组合两个来源，而不是让一个 API 回答所有问题。可用一个来源完成快速标准化检索，再用另一个权威来源确认重要结论，从而同时兼顾效率与可审计性。还应明确不同来源数值冲突时以谁为准，不能让 Gemini 静默合并不同时间戳或会计口径。
This is a fit matrix, not a universal ranking. Coverage, latency, rate limits, exchange entitlements, and redistribution rights vary by plan; verify the current official documentation before launch.这是一张适配矩阵，不是通用排名。覆盖、延迟、限额、交易所授权与再分发权会随套餐变化，上线前请核查最新官方文档。
| Provider服务商 | Best fit最适合 | Useful data主要数据 | Gemini advantageGemini 适配点 | Verify first优先核查 |
|---|---|---|---|---|
| Alpha Vantage | Broad prototypes广泛原型 | Stocks, FX, crypto, indicators, fundamentals股票、外汇、加密、指标与基本面 | Many functions behind a conventional request pattern统一请求方式覆盖多类函数 | Limits, freshness, premium endpoints限额、时效与付费端点 |
| Twelve Data | Multi-asset apps多资产应用 | Time series, reference data, indicators时序、参考数据与指标 | Consistent response structures响应结构较一致 | Symbol coverage, credits, streaming标的覆盖、积分与流式权限 |
| Massive | U.S. market depth美国市场深度 | Trades, quotes, aggregates, reference data成交、报价、聚合与参考数据 | Precise endpoints support narrow tools细分端点适合窄工具契约 | Plan, delay, history, entitlements套餐、延迟、历史与授权 |
| Financial Modeling Prep | Company research公司研究 | Statements, ratios, estimates, profiles财报、比率、预期与公司资料 | Inputs for sourced company briefs适合生成带来源的公司简报 | Restatements, periods, redistribution重述、期间与再分发权 |
| Finnhub | Mixed research综合研究 | Market, company, estimates, news行情、公司、预期与新闻 | One integration supports several intents一次集成支持多种研究意图 | Plan, geography, news rights套餐、地域与新闻权利 |
| Nasdaq Data Link | Specialist datasets专业数据集 | Publisher and economic datasets出版方与经济数据集 | Dataset IDs strengthen provenance数据集标识强化来源追溯 | License, cadence, cost许可、频率与成本 |
| Alpaca | Data beside execution行情邻接交易 | Stocks, options, crypto market data股票、期权与加密行情 | Read and action tools remain separate可拆分读取工具与动作工具 | Feed, permissions, approvalFeed、权限与审批 |
| FRED / SEC EDGAR | Authoritative public sources权威公共来源 | U.S. macro series and filings美国宏观序列与监管文件 | Primary evidence supports audits一手证据便于审计 | Revisions, policies, parsing修订、访问政策与解析 |
Documentation tells you what an API claims to support. A controlled pilot shows whether it answers your questions, handles your edge cases, and operates inside your cost and licensing constraints. Use the same evaluation set for every candidate.文档说明 API 声称支持什么，受控试点才能验证它是否能回答真实问题、处理边缘情况，并满足成本与许可约束。所有候选服务商应使用同一评测集。
Choose representative questions across quotes, fundamentals, filings, macro, news, and failure cases. Define required fields, acceptable freshness, evidence, and a reviewable answer.选择覆盖报价、基本面、监管文件、宏观、新闻与故障场景的代表性问题，定义必需字段、可接受时效、证据与可审核答案。
Use common and awkward symbols: multiple exchanges, share classes, delisted names, corporate actions, missing fields, non-USD values, and amended filings.测试常规与复杂标的：多交易所、股类、退市公司、公司行动、字段缺失、非美元数值与修订文件。
Replay the expected query mix. Exercise rate limits, timeouts, nulls, schema changes, reconnects, partial responses, and a provider outage. Verify caching does not hide stale data.回放预期查询组合，测试限流、超时、空值、Schema 变化、重连、部分响应与服务中断，并确认缓存不会掩盖过期数据。
Review answer accuracy, citation coverage, freshness compliance, symbol coverage, latency distribution, projected request cost, licensing fit, and migration effort.审核答案准确性、引用覆盖、时效合规、标的覆盖、延迟分布、预计请求成本、许可适配与迁移工作量。
The right answer depends on the evidence Gemini must retrieve and the decision the reader needs to make.正确选型取决于 Gemini 必须获取什么证据，以及读者需要作出什么决策。
Prioritize timestamps, market sessions, reconnect behavior, corporate actions, and a clear delayed-versus-real-time label.重点核查时间戳、交易时段、重连、公司行动，以及延迟与实时数据的明确标识。
Use normalized fundamentals for speed, then preserve links to the filing, fiscal period, units, and revision status behind each material claim.用标准化基本面提升效率，同时为重要结论保留监管文件、财政期间、单位与修订状态。
Keep observation date, release date, units, frequency, and revision status separate. Latest revised data and point-in-time data answer different questions.分别保留观测日期、发布日期、单位、频率与修订状态。最新修订值和历史时点值回答的是不同问题。
Gemini can request custom functions, but the application still validates arguments, applies credentials, calls the provider, and returns the result. Follow Google's official function-calling guide.Gemini 可以请求自定义函数，但应用仍需校验参数、应用凭据、调用服务商并返回结果。实现时请参考 Google 官方的函数调用指南。
Determine asset, market, data type, time range, and required freshness.确定资产、市场、数据类型、时间范围与所需时效。
Use explicit functions for quote, filing, fundamental, or macro retrieval.为报价、文件、基本面或宏观检索使用明确函数。
Map symbols, units, currencies, timestamps, and failure states before model reasoning.在模型推理前统一标的、单位、币种、时间戳与失败状态。
Give Gemini only relevant observations while preserving provider and retrieval metadata.只向 Gemini 返回相关观测，同时保留服务商与获取元数据。
Store exchange time, retrieval time, delay class, and session state separately.分别保存交易所时间、获取时间、延迟类别与交易时段状态。
Pin fiscal period, form, units, and retrieval version before comparing values.比较数值前固定财政期间、表单、单位与获取版本。
An API key does not automatically grant display, caching, training, or redistribution rights.API Key 并不自动授予展示、缓存、训练或再分发权利。
Keep read-only tools separate from account or trading actions and require approval for consequential changes.把只读工具与账户或交易动作分开，并对高影响变更设置审批。
Yes, when an application connects Gemini to a licensed source through function calling or another controlled tool layer. Gemini itself is not a market-data feed. Confirm the provider's delay, exchange entitlements, and permitted use.可以，但需要应用通过函数调用或其他受控工具层连接有许可的数据源。Gemini 本身不是行情 Feed；仍需核查延迟、交易所授权与允许用途。
There is no universal free winner. Alpha Vantage can suit prototypes, while FRED and SEC EDGAR are authoritative public sources for U.S. macro series and filings. Free and trial access often has limits and may not permit production redistribution.没有通用的免费冠军。Alpha Vantage 可用于原型；FRED 与 SEC EDGAR 分别是美国宏观序列和监管文件的权威公共来源。免费或试用访问通常有限额，也未必允许生产再分发。
Use REST for snapshots, historical bars, fundamentals, filings, and scheduled research. Use WebSocket streams only for continuous updates, and aggregate or filter events before sending them to the model.快照、历史 K 线、基本面、文件与定时研究通常使用 REST。只有需要持续更新时才使用 WebSocket，并在事件进入模型前完成聚合与过滤。
A developer can connect action tools, but the safe design separates research from execution, validates orders deterministically, scopes credentials, logs actions, and requires human approval for consequential trades.开发者可以连接动作工具，但安全设计应把研究与执行分开，对订单做确定性校验、限制凭据权限、记录动作，并对高影响交易要求人工审批。
A provider can expose hundreds of endpoints and still be a poor fit for Gemini. Score the exact questions your workflow must answer, using the same symbols, markets, time ranges, and failure cases for every candidate.服务商即使提供数百个端点，也未必适合 Gemini。应围绕工作流必须回答的真实问题，用相同标的、市场、时间范围与失败场景评估所有候选方。
Check exchanges, asset classes, share classes, delisted symbols, corporate actions, fundamentals, filing types, and geographic scope. A broad label such as “global equities” is not enough; test a representative symbol set.核查交易所、资产类别、股类、退市标的、公司行动、基本面字段、文件类型与地域范围。“全球股票”这类描述并不够，应使用代表性标的集测试。
Determine whether each timestamp represents exchange time, provider ingestion, publication, revision, or API retrieval. Market prices, filings, and macro releases use different clocks; Gemini should disclose the one relevant to the claim.明确时间戳代表交易所时间、服务商入库、正式发布、修订还是 API 获取时间。行情、文件与宏观数据使用不同时间体系，Gemini 应披露与结论相关的时间。
Preserve provider, endpoint, dataset or filing identifier, request parameters, observed period, and retrieval time. A fluent summary without those fields is difficult to review and unsafe to reuse.保留服务商、端点、数据集或文件标识、请求参数、观测期间与获取时间。缺少这些字段的流畅摘要难以审核，也不适合复用。
Gemini works best with predictable types, units, currencies, enumerations, and structured errors. Distinguish zero, null, unavailable, not entitled, and not yet reported; they do not mean the same thing.稳定类型、单位、币种、枚举与结构化错误有助于 Gemini 可靠工作。零值、空值、不可用、未授权与尚未披露含义不同，不能混用。
Test rate limits, concurrency, timeouts, pagination, batch endpoints, reconnect behavior, and retry guidance. Measure the cost of your real query mix instead of comparing headline plan prices.测试限流、并发、超时、分页、批量端点、重连与重试建议。应按真实查询组合测算成本，而不是只比较套餐首页价格。
Confirm what the contract permits for internal analysis, end-user display, derived data, caching, redistribution, and model context. Technical access through an API key does not grant every downstream use.确认合同是否允许内部分析、终端展示、衍生数据、缓存、再分发与模型上下文使用。能够通过 API Key 访问，不代表拥有所有下游使用权。
The comparison table is the fast scan. These profiles explain when a provider is a sensible primary source, when it works better as a secondary source, and what to verify before depending on it.对比表用于快速浏览，下面则解释何时适合作为主数据源、何时更适合补充使用，以及正式依赖前必须核查什么。
Useful when one integration must cover several common market and analytical functions quickly. Treat it as a prototype candidate until you test current limits, endpoint access, timestamps, and the exact fields required by your target questions.当一次集成需要快速覆盖常见行情与分析函数时较实用。在验证最新限额、端点权限、时间戳和目标字段前，更适合作为原型候选。
A candidate for workflows spanning equities, FX, crypto, and indicators. Validate symbol conventions, credit consumption, history depth, exchange coverage, and whether streaming access is included in the intended plan.适合覆盖股票、外汇、加密与指标的工作流。应核查标的命名、积分消耗、历史深度、交易所覆盖及目标套餐是否包含流式访问。
Consider it when trades, quotes, aggregates, reference data, and history need precise endpoints. Check feed entitlement, delay class, market coverage, historical availability, and the treatment of corporate actions.当成交、报价、聚合、参考数据与历史需要精确端点时可重点评估。应核查 Feed 授权、延迟类别、市场覆盖、历史可用性与公司行动处理方式。
Useful for statements, ratios, estimates, profiles, and research briefs. Align fiscal period, currency, units, filing form, and restatement status before Gemini compares companies or calculates growth.适合财报、比率、预期、公司资料与研究简报。Gemini 比较公司或计算增长前，应对齐财政期间、币种、单位、文件类型与重述状态。
Useful when a workflow combines market, company, estimate, and news data without many integrations. Verify plan-specific endpoints, regional coverage, news rights, and whether results carry enough source context.适合在不维护大量集成的情况下组合行情、公司、预期与新闻数据。需要核查套餐端点、地域覆盖、新闻权利与来源上下文。
Use FRED for U.S. macro series and SEC EDGAR for filings when primary evidence matters. They do not replace a low-latency market feed; they solve authority, auditability, and source identity.需要一手证据时，FRED 适合美国宏观序列，SEC EDGAR 适合监管文件。它们不能替代低延迟行情 Feed，解决的是权威性、可审计性与来源身份。
Do not send an opaque vendor payload directly into the prompt. Normalize the fields that establish identity, meaning, time, source, and trust, while retaining the original response outside model context for debugging.不要把不透明的服务商载荷直接塞进 Prompt。应先规范化能够确定身份、含义、时间、来源与可信度的核心字段，同时在模型上下文之外保留原始响应以便排查。
Return canonical symbol, exchange, asset type, and provider symbol. Do not guess when the user supplies an ambiguous ticker.返回规范标的、交易所、资产类型与服务商标的。用户提供歧义代码时不要猜测。
Include metric, value, unit, currency, scale, adjustment method, and fiscal or observation period.包含指标、数值、单位、币种、数量级、调整方式以及财政或观测期间。
Separate observed, published, revised, and retrieved time. Add a delay class or maximum-age decision.分别记录观测、发布、修订与获取时间，并增加延迟类别或最大数据年龄判断。
Preserve provider, endpoint, dataset ID, parameters, and warnings for stale, partial, restated, or unauthorized results.保留服务商、端点、数据集 ID、参数，以及过期、部分返回、重述或未授权等警告。
Start with a representative read-only query, inspect matching capabilities and required parameters, then test with non-sensitive inputs before adding production credentials.从一个有代表性的只读查询开始，检查匹配能力与必需参数，再用非敏感输入测试，最后才接入生产凭据。
