Compare financial data APIs for Codex 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 Codex 的金融数据 API。
A Codex user needs working code, not an abstract vendor recommendation. Define the expected module, commands, tests, and evidence before comparing providers.Codex 用户需要的是可运行代码，而不是抽象的服务商建议。比较供应商前，先定义模块、命令、测试与证据要求。
This is a fit matrix, not a universal ranking. Coverage, entitlements, latency, and limits vary by plan and market; verify them in official documentation before launch.这是一张适配矩阵，不是通用排名。覆盖范围、授权、延迟与限额会因套餐和市场而异，上线前应以官方文档为准。
| Source来源 | Best fit最适合 | Useful data主要数据 | Agent advantageAgent 优势 | Verify before production上线前核查 |
|---|---|---|---|---|
| Alpha Vantage | Fast prototypes快速原型 | Equities, FX, crypto, indicators, fundamentals, economic series股票、外汇、加密资产、指标、基本面、经济序列 | Broad REST surface and official MCP/AI-agent entry pointREST 覆盖广，并提供官方 MCP/AI Agent 入口 | Rate limits, endpoint entitlements, data freshness速率限制、端点权限、数据时效 |
| Massive | U.S. market depth美国市场深度 | Stocks, options, futures, indices, FX, crypto, bulk files股票、期权、期货、指数、外汇、加密资产、批量文件 | REST, streaming, and bulk history support research and backtestsREST、流式与批量历史数据适合研究和回测 | Exchange entitlements, real-time status, redistribution rights交易所授权、实时状态、再分发权利 |
| Twelve Data | Multi-asset global workflows全球多资产工作流 | Stocks, FX, ETFs, funds, commodities, crypto, indicators股票、外汇、ETF、基金、商品、加密资产、指标 | Consistent REST and WebSocket patterns across asset classes跨资产类别保持较一致的 REST 与 WebSocket 模式 | Market-specific delay, null handling, credits and timezone rules不同市场延迟、空值、点数与时区规则 |
| Finnhub | Research with news and estimates新闻与预期研究 | Quotes, fundamentals, estimates, transcripts, news, alternative data报价、基本面、预期、电话会、新闻、另类数据 | One surface can support multi-step company research单一接口可支撑多步骤公司研究 | Dataset-specific plans, history depth, geographic coverage不同数据集套餐、历史深度、地域覆盖 |
| Financial Modeling Prep | Company fundamentals公司基本面 | Statements, ratios, profiles, estimates, transcripts, market endpoints财务报表、比率、公司资料、预期、电话会及行情端点 | Convenient normalized fields for structured company comparisons标准化字段便于进行结构化公司对比 | Restatement handling, source lineage, commercial usage terms重述处理、来源链路、商业使用条款 |
| Nasdaq Data Link | Specialist datasets专业数据集 | Curated free and premium datasets from multiple publishers来自多家发布方的精选免费与付费数据集 | Dataset catalog supports targeted research beyond common quotes数据集目录适合超出常规报价的专项研究 | Publisher methodology, update schedule, license per dataset各数据集发布方方法、更新周期与许可 |
| Alpaca Market Data | Data beside trading infrastructure与交易基础设施相邻 | Equities, options, crypto market data through historical and streaming interfaces通过历史与流式接口提供股票、期权和加密资产行情 | A practical fit when research and controlled execution share a stack适合研究与受控执行共用同一技术栈 | Feed selection, subscription limits, strict action approvals数据源选择、订阅限制、严格执行审批 |
| SEC EDGAR APIs | Authoritative U.S. filings权威美国监管文件 | Submissions and XBRL company facts from the regulator监管机构提供的申报记录与 XBRL 公司事实 | Primary-source evidence for cited filing research为带引用的监管文件研究提供一手证据 | Fair-access policy, taxonomy mapping, amended filings公平访问政策、分类映射、修订文件 |
A Codex integration should end in reviewable files: an adapter, typed models, fixtures, tests, configuration, and an operations note. Start with that deliverable rather than a generic feature list.Codex 集成应落成可审核文件：适配器、类型模型、fixture、测试、配置与运行说明。选型应从交付物出发，而不是从通用功能清单出发。
For Alpha Vantage or Twelve Data, ask Codex for one read-only client, a normalized bar model, retry bounds, and fixtures for normal, delayed, empty, and rate-limited responses.接入 Alpha Vantage 或 Twelve Data 时，让 Codex 生成一个只读客户端、标准化 K 线模型、重试边界，以及正常、延迟、空值和限速响应的 fixture。
For Massive or another high-volume feed, separate historical backfill from WebSocket ingestion. Require cursor checkpoints, deduplication, reconnect tests, and raw-event retention outside prompts.对 Massive 等高流量数据源，应分离历史回填与 WebSocket 摄取，并要求游标检查点、去重、重连测试，以及在 Prompt 外保留原始事件。
For SEC EDGAR, the committed artifact should preserve CIK, accession, form, filing date, period, units, and source URL. Codex may explain a deterministic diff, but document identity must stay in code.使用 SEC EDGAR 时，仓库产物应保存 CIK、accession、表单、申报日期、期间、单位与来源 URL。Codex 可以解释确定性 diff，但文件身份必须由代码保存。
For Nasdaq Data Link or macro datasets, commit the dataset code, schema version, update time, revision rule, and a reproducible import command—not only a notebook that happens to run once.使用 Nasdaq Data Link 或宏观数据集时，应提交数据集代码、Schema 版本、更新时间、修订规则与可复现导入命令，而不是仅保留一次性 Notebook。
Codex can generate HTTP code for almost any provider. The real difference is how safely the repository can type, test, replay, review, and operate that code.Codex 几乎可以为任何服务商生成 HTTP 代码。真正的差异在于仓库能否安全地类型化、测试、回放、审核并运行这些代码。
Codex is most useful when the integration lives as reviewable code: a small adapter, typed response model, recorded fixtures, deterministic calculations, and tests for stale or missing fields. Clear documentation and stable schemas therefore matter as much as dataset breadth.当集成以可审核代码存在时，Codex 的价值最大：小型适配器、类型化响应模型、可回放 fixture、确定性计算，以及针对过期或缺失字段的测试。因此，清晰文档与稳定 Schema 和数据覆盖同样重要。
Ask Codex to implement a narrow function such as get_daily_bars or get_company_facts, not a universal finance client. Keep authentication and retry policy outside model-visible arguments.让 Codex 实现 get_daily_bars 或 get_company_facts 这类窄函数，不要一开始就做万能金融客户端。认证与重试策略不应出现在模型可见参数中。
Store redacted sample responses for split-adjusted prices, amended filings, null fundamentals, rate-limit errors, and closed-market states. Tests should run without a live key.为复权价格、修订文件、基本面空值、限速错误和休市状态保存脱敏样本响应，使测试无需真实 API Key 也能运行。
Return source URL, provider timestamp, period, units, delay class, and warnings beside each normalized value. A reviewer should be able to reproduce the result from the repository artifact.每个标准化数值都应附带来源 URL、服务商时间戳、期间、单位、延迟类别与警告，使审核者能从仓库产物复现结果。
Codex can implement direct REST or SDK adapters, invoke a constrained CLI, or use MCP tools in a configured environment. None of these paths replaces server-side validation or data licensing.Codex 可以实现 REST 或 SDK 适配器、调用受限 CLI，或在已配置环境中使用 MCP 工具；但任何接入方式都不能替代服务端校验与数据许可。
Convert “analyze this stock” into a bounded job: symbols, market, metric definitions, reporting period, acceptable delay, currency, and output evidence.把“分析这只股票”改写成有边界的任务：标的、市场、指标定义、报告期、可接受延迟、币种与证据要求。
Prefer tools such as get_quote, get_financial_facts, and get_filing_section over a generic URL fetcher. Validate symbols, intervals, ranges, and response size on the server.优先提供 get_quote、get_financial_facts、get_filing_section 等窄工具，而不是通用 URL 抓取器；并在服务端校验标的、周期、区间和响应大小。
Return a compact envelope containing value, units, source, observed time, effective period, delay status, and warnings. Keep raw responses outside the prompt for audit and replay.返回紧凑数据包，包含数值、单位、来源、观测时间、生效期间、延迟状态与警告；原始响应保留在 Prompt 之外，用于审计与回放。
Use code for returns, growth rates, ratios, currency conversion, and date alignment. Let the model interpret validated outputs rather than perform long arithmetic from prose.收益率、增长率、比率、汇率换算与日期对齐应由代码完成；模型负责解释已验证输出，而不是在文本中做长计算。
Show the user which source and period support each conclusion. If feeds disagree or a field is missing, report the conflict instead of silently selecting a value.向用户展示每条结论对应的来源与期间。若数据源冲突或字段缺失，应明确报告，而不是静默挑选一个数值。
Illustrative schema only—the value is intentionally not real. See the official OpenAI function-calling guide and MCP documentation. If you want to discover finance tools without hard-coding every provider, review the QVeris financial data MCP pattern.以上仅为示意 Schema，其中数值刻意使用非真实占位。可参考官方 OpenAI Function Calling 指南与 MCP 文档。若希望在不硬编码每个服务商的前提下发现金融工具，可查看 QVeris 金融数据 MCP 模式。
Do not ask Codex to “build a finance agent” in one pass. Give it a sequence of repository outcomes with a review boundary after each one.不要让 Codex 一次性“构建金融 Agent”。应把任务拆成连续的仓库产物，并在每一步设置审核边界。
Codex first identifies package conventions, the HTTP client, secret storage, logging, test runner, and the target module. It then proposes a typed interface and file list against official provider documentation.Codex 先识别包规范、HTTP 客户端、密钥存储、日志、测试框架与目标模块，再根据服务商官方文档提出类型接口与文件清单。
Generate one provider call and a normalized result. Keep transport, parsing, normalization, and financial calculation in separate functions so the reviewer can test each boundary.生成一个服务商调用和标准化结果，将传输、解析、标准化与金融计算拆成独立函数，便于逐层测试。
Capture sanitized responses for success, no data, stale data, entitlement failure, rate limiting, and schema drift. Normal CI should not need a live key or an open market.为成功、无数据、数据过期、权限失败、限速与 Schema 漂移保存脱敏响应。普通 CI 不应需要真实密钥或依赖开市。
Use a separate opt-in command, scoped read credential, fixed symbols, a call budget, and redacted logs. Attach the result shape and source time to the pull request.使用独立显式命令、限域只读凭据、固定标的、调用预算与脱敏日志，并将结果形态和来源时间附在 Pull Request 中。
Documentation shows the happy path. These repository cases reveal whether Codex can produce an adapter that remains correct when finance-specific edge cases arrive.文档通常只展示成功路径。以下仓库用例用于验证 Codex 生成的适配器在金融边界情况出现时是否仍然正确。
Delayed quote, closed market, DST boundary, out-of-order tick, provider time versus retrieval time, and explicit maximum-age rejection.延迟报价、休市、夏令时边界、乱序 Tick、服务商时间与获取时间，以及明确的最大时效拒绝。
Exchange suffix, share class, ticker reuse, delisted symbol, split, dividend, and raw versus adjusted price.交易所后缀、股类、代码复用、退市标的、拆股、分红，以及原始价格与复权价格。
Annual versus quarterly values, fiscal-calendar mismatch, currency and scale, amended filing, restatement, and missing fact.年度与季度值、财政日历错位、币种与数量级、修订文件、重述与缺失事实。
401, 403, 429, timeout, truncated JSON, added or removed fields, repeating cursor, reconnect, and duplicate event.401、403、429、超时、截断 JSON、字段增删、游标重复、重连与重复事件。
Store exchange time, provider retrieval time, delay class, and market-session state separately. Do not let the model infer “live” from a recent-looking price.应分别保存交易所时间、服务商获取时间、延迟类别与市场交易状态，不能让模型仅凭一个看起来较新的价格推断“实时”。
Fundamental providers may normalize fields differently, and filings can be amended. Pin fiscal period, form, units, and retrieval version; compare like with like before asking the model for a narrative.不同基本面服务商的字段标准化口径可能不同，监管文件也可能修订。应固定财政期间、表单、单位与获取版本，在让模型生成叙述前先确保可比。
Treat retrieved text as untrusted data. It must not change tool permissions, reveal credentials, or trigger trades. Separate read-only research from any execution tool and require explicit approval.检索文本必须视为不可信数据，不能改变工具权限、泄露凭据或触发交易。只读研究与任何执行工具应隔离，并要求明确审批。
An API key does not automatically grant the right to display, cache, redistribute, or train on every field. Review the contract for each feed and avoid sending unnecessary proprietary data into model context.拥有 API Key 并不等于自动拥有所有字段的展示、缓存、再分发或训练权利。应逐个数据源审查合同，并避免把无关的专有数据发送进模型上下文。
Start with the provider that covers one representative question and has documentation you can convert into a typed adapter plus replayable fixtures. Alpha Vantage or Twelve Data can be approachable for a REST prototype; SEC EDGAR is the stronger starting point when the task is U.S. filing evidence.优先选择能覆盖一个代表性问题，并且文档足以生成类型化适配器和可回放 fixture 的服务商。REST 原型可从 Alpha Vantage 或 Twelve Data 评估；若任务核心是美国监管文件证据，则优先 SEC EDGAR。
Use a direct REST or SDK adapter when the repository owns a stable, narrow integration. Use MCP when a configured Codex environment needs reusable model-facing tools or capability discovery. Authentication, validation, permission checks, and logging stay outside the model in both designs.如果仓库拥有稳定且边界明确的集成，使用 REST 或 SDK 适配器；如果已配置的 Codex 环境需要复用模型工具或发现能力，可使用 MCP。两种方式都必须在模型外完成认证、校验、权限检查与日志。
Use captured event fixtures for reconnect, duplication, ordering, delay, and session boundaries. Keep one opt-in live smoke test with a scoped key and call budget. Normal CI should not depend on an open market or a live subscription.使用事件 fixture 测试重连、重复、排序、延迟与交易时段边界；另设一个使用限域密钥和调用预算的显式实时冒烟测试。普通 CI 不应依赖开市状态或实时订阅。
Only with strict separation. The research adapter should be read-only and unable to place orders. Proposed actions must pass deterministic policy checks and explicit human approval before a separately authenticated execution service acts.可以，但必须严格隔离。研究适配器应为只读且无法下单；动作建议必须经过确定性策略检查与明确人工审批，之后才可由独立认证的执行服务处理。
Describe one financial data job, inspect matching schemas and parameters, then generate a read-only adapter with fixtures before adding production credentials.描述一个金融数据任务，检查匹配的 Schema 与参数，再生成带 fixture 的只读适配器，最后才接入生产凭据。
