Free Forex Market Data API
Data Types, Checks & Integration免费外汇市场数据 API
数据类型、验证与接入
Understand quotes, OHLC candles, time series, free-tier limits, and the validation steps required before forex market data enters your app.
了解实时报价、OHLC K 线、时间序列与免费额度，
并在外汇市场数据进入应用前完成必要验证。
Forex market data types inside an API外汇市场数据接口包含哪些数据类型
“Forex data” can describe several datasets that are not interchangeable. A provider may offer only one of them on its free tier, so inspect the endpoint and sample response rather than relying on the product label.
“外汇数据”可能代表多种不能互换的数据集。免费方案可能只开放其中一种，因此应检查具体端点和样例响应，而不能只看产品名称。
Live quotes: bid, ask, and midpoint
A quote snapshot should identify the currency pair, price side, source timestamp, and market state. Midpoint data is useful for display and valuation but is not automatically an executable trading price.
OHLC candles for charts and research
Candles aggregate observations into open, high, low, and close fields for a defined interval. Confirm timezone, interval boundaries, missing-bar policy, and whether volume is available or meaningful for OTC FX.
Historical forex time series
A historical endpoint should expose dates or timestamps, start and end limits, supported granularity, pagination, corrections, and consistent pair conventions.
Reference rates and market metadata
Central-bank reference rates suit accounting and conversion workflows. Symbol lists, trading sessions, source labels, and market-status fields provide the metadata needed to interpret them correctly.
Tick volume, contributor depth, and liquidity proxies
OTC FX has no single consolidated exchange volume. A volume field may count quote updates, provider ticks, trades from one venue, or nothing at all. Record its definition before using it as a liquidity or activity signal.
Economic events and session context
Calendar events, session labels, holidays, and market status help explain gaps and volatility. Treat them as contextual datasets with their own publication time rather than embedding them silently into a price record.
实时报价：买价、卖价与中间价
报价快照应标明货币对、价格方向、来源时间戳和市场状态。中间价适合展示和估值，但不能自动视为可成交价格。
图表与研究所需的 OHLC K 线
K 线把观测值聚合为指定周期的开、高、低、收。需要确认时区、周期边界、缺失 Bar 策略，以及 OTC 外汇中的 volume 是否存在实际意义。
外汇历史时间序列
历史接口应说明日期或时间戳、起止范围、支持粒度、分页、数据修订和稳定的货币对方向。
参考汇率与市场元数据
央行参考汇率适合财务核算和货币换算；品种列表、交易时段、来源标签与市场状态字段用于正确解释数据。
Tick 数量、报价来源深度与流动性替代指标
OTC 外汇没有统一的全市场成交量。volume 字段可能表示报价更新次数、供应商 Tick、单一场所成交，甚至完全为空。将其用于流动性或活跃度判断前，必须保存并核对字段定义。
经济事件与交易时段背景
经济日历、交易时段、节假日和市场状态可以解释缺口与波动，但它们是拥有独立发布时间的背景数据，不能在没有说明的情况下混入价格记录。
Match the dataset to the workload让数据集与工作负载匹配
Use reference rates for accounting and conversion, recent quotes for dashboards, and historical OHLC or tick series for backtests. An agent needs bounded JSON with explicit source and freshness fields. Do not present a daily fixing as live or combine providers before normalizing pair direction, timestamps, and price type.
财务核算和换算适合参考汇率，行情看板需要近期报价，回测则需要历史 OHLC 或 Tick 序列。Agent 应接收带有明确来源和时效字段的受控 JSON。不要把每日定盘价展示成实时行情，也不要在统一货币对方向、时间戳和价格类型前混用数据源。
A valuation or treasury workflow usually values consistency, an approved fixing, and a reproducible business date more than millisecond speed. A monitoring dashboard needs clear source age and market state. A research pipeline needs long history, stable bar construction, and revision evidence. An automated agent additionally needs strict pair and date bounds, explicit units, and a refusal path when the requested data class is unavailable.
估值或资金管理流程通常更看重一致口径、获批定盘价和可复现业务日期，而不是毫秒速度；监控看板需要清楚的数据年龄和市场状态；研究流程需要足够长的历史、稳定 K 线构造方式和修订证据；自动化 Agent 还必须限制币种对与日期范围、明确单位，并在所需数据类型不可用时能够拒绝继续。
Write one acceptance record per workload instead of declaring a provider universally approved. The same source can pass for a daily conversion table and fail for an intraday alert because the required cadence, price side, outage behavior, and usage rights are different.
应针对每类工作负载分别形成验收记录，而不是笼统宣布某个供应商适合所有任务。同一数据源可能足以支持每日换算表，却不适合盘中提醒，因为两者对更新频率、报价方向、中断行为和使用权的要求完全不同。
Free forex data sources: choose by price meaning免费外汇数据源：先按价格含义选择
The most important difference between free sources is not the response format; it is what the number represents. A central-bank reference rate, a vendor's latest rate, and a broker or venue bid/ask can all be valid while disagreeing at the same timestamp. Select the source class before comparing quotas.
不同免费来源之间最重要的区别并不是响应格式，而是数值代表什么。央行参考汇率、数据商最新汇率、券商或交易场所买卖报价都可能正确，却在同一时刻给出不同结果。因此应先选定数据类别，再比较调用额度。
| Starting point免费起点 | What it provides提供内容 | Good fit适用场景 | Do not assume不能想当然 |
|---|---|---|---|
| ECB Data API | Programmatic SDMX access to daily and monthly euro foreign-exchange reference rates, with date filters and revision queries.通过 SDMX 接口获取以欧元为基准的日度、月度外汇参考汇率，并支持日期筛选和修订查询。 | Accounting, treasury conversion, reporting, reproducible historical reference series, and official-source validation.财务核算、资金换算、报告、可复现历史参考序列和官方来源核验。 | ECB states that the rates are informational averages published on working days around 16:00 CET; they are not necessarily transaction prices or a 24-hour live feed.ECB 明确说明该数据是在工作日约 16:00 CET 发布的信息性平均参考汇率，不一定是实际成交价，也不是 24 小时实时行情。 |
| Alpha Vantage | A free-key path for current currency-pair exchange rates and daily FX OHLC; the documentation also lists JSON and CSV responses.通过免费 Key 获取货币对当前汇率和日度 FX OHLC，官方文档同时列出 JSON 与 CSV 响应。 | Small currency converters, recent daily charts, notebooks, and prototypes that make a limited number of pair requests.小型货币换算、近期日线图表、研究笔记和请求货币对数量有限的原型。 | The intraday FX time-series function is currently marked Premium. A latest exchange-rate value also does not disclose an executable spread unless bid and ask are explicitly returned.当前文档把盘中 FX 时间序列标为 Premium；若响应未明确返回买卖价，最新汇率也不能被当作可成交点差。 |
| Twelve Data | The free individual plan lists real-time forex market data, and the time-series endpoint supports pairs such as EUR/USD with OHLC history.其免费个人套餐列出实时外汇市场数据，time series 接口支持 EUR/USD 等货币对及 OHLC 历史。 | Multi-pair dashboards, charting prototypes, and applications that need one API style across forex and other asset classes.多货币对看板、图表原型，以及希望外汇和其他资产共用一套 API 风格的应用。 | Credits are consumed per symbol, including batched requests. Verify the free plan's current pair coverage, intervals, update cadence, history, and permitted display before production use.即使批量请求，额度也按标的消耗。生产使用前必须确认免费套餐当前的货币对覆盖、周期、更新频率、历史范围和展示权限。 |
Map each common search task to the right source把常见需求对应到正确来源
Use a documented reference-rate series with a reproducible business date, base currency, publication calendar, and revision policy. Store the rate identity with the converted value.
Use recent market observations with an event timestamp, receive timestamp, market state, and maximum acceptable age. A daily fixing is unsuitable even if its source is authoritative.
Require a stated bar basis—bid, ask, midpoint, or vendor composite—plus timezone, interval boundaries, missing-bar rules, and a stable historical revision process.
Validate executable bid/ask from the relevant broker or venue, account entitlement, liquidity, and order path. An aggregated free rate can provide context but should not substitute for execution-side market data.
采用有明确业务日期、基础币种、发布日历和修订规则的参考汇率，并把所用汇率的身份与换算结果一并保存。
使用带有事件时间、接收时间、市场状态和最大可接受数据年龄的近期市场观测。即使来源权威，每日定盘价也不适合盘中提醒。
要求明确 K 线基于买价、卖价、中间价还是供应商综合价，同时核对时区、周期边界、缺失 Bar 规则和稳定的历史修订流程。
应验证相关券商或交易场所的可成交买卖价、账户行情权限、流动性和订单路径。免费聚合汇率可以提供背景，但不能替代执行侧行情。
A validation pipeline for free forex market data免费外汇市场数据的验证接入流程
1. Define the market-data contract
List pairs, quote side, interval, freshness, history depth, timezone, market-session behavior, and allowed usage before searching for a provider.
2. Inspect the free tier at endpoint level
Check which endpoints, symbols, intervals, date ranges, request credits, streaming features, and commercial rights are actually included.
3. Validate a real response
Test success, empty-market, stale-data, invalid-symbol, 429, and upstream-error cases. Compare timestamps and quotation direction with the documentation.
4. Normalize, cache, and monitor
Map the response into your own schema, cache only as permitted, record source and retrieval time, and alert when freshness or completeness falls outside the contract.
5. Reconcile related datasets
Check that a snapshot falls within the matching candle, inverse pairs agree within tolerance, and derived crosses use synchronized observations. Keep disagreements as quality events rather than overwriting them.
6. Test market transitions
Inspect weekend close and reopen, daylight-saving changes, holidays, major announcements, and a known provider outage. Verify that closed, quiet, delayed, and disconnected states remain distinguishable.
7. Preserve evidence for every downstream use
Store provider, upstream source when known, pair, side, event time, receive time, price basis, entitlement, and raw-response hash so a dashboard, model, or agent answer can be reproduced.
1. 定义市场数据契约
先写明货币对、报价方向、周期、时效、历史深度、时区、市场时段行为和允许用途，再寻找数据源。
2. 按端点检查免费方案
确认免费方案实际开放的端点、品种、周期、日期范围、调用额度、流式能力和商业使用权。
3. 验证真实响应
测试成功、闭市、数据过期、无效品种、429 和上游错误，并将时间戳和报价方向与文档核对。
4. 标准化、缓存并监控
把响应映射为内部结构，按授权缓存，记录来源与获取时间，并在时效或完整性不符合契约时告警。
5. 对相关数据集进行交叉核对
检查快照是否落在对应 K 线范围内、正反向币种对是否在容差内一致，以及推导交叉盘是否使用同步观测。差异应记录为质量事件，不能直接互相覆盖。
6. 测试市场状态切换
检查周末收盘与重开、夏令时切换、节假日、重大公告和已知供应商中断，确认闭市、清淡、延迟和断线仍能被明确区分。
7. 为下游用途保留证据
保存供应商、已知上游来源、币种对、报价方向、事件时间、接收时间、价格口径、授权和原始响应校验值，使看板、模型或 Agent 回答可以复现。
What “free” does and does not guarantee“免费”能保证什么、不能保证什么
Free access can suit prototypes, conversion, education, or limited research. It does not guarantee real-time delivery, unrestricted history, redistribution rights, service levels, or stable quotas. Treat plan terms as changeable configuration.
免费方案适合原型、换算、教学或有限研究，但不保证实时传输、无限历史、再分发权、服务等级或稳定额度。应把套餐条款视为会变化的配置。
Model the free allowance from actual endpoint credits, pairs, refresh cycles, users, retries, and reconnects. Also record what happens at the boundary: some services return 429, others downgrade data, block an endpoint, or require an upgrade. A production design needs an explicit response for each state rather than silently serving a different dataset.
应根据端点计费权重、币种对数量、刷新轮次、用户数、重试和重连估算免费额度，并记录达到边界后的真实行为：有的服务返回 429，有的降低数据等级、关闭端点或要求升级。生产系统必须为每种状态设计明确处理方式，不能静默改用另一类数据。
How QVeris fits the forex market data workflowQVeris 如何参与外汇市场数据工作流
QVeris helps an app or agent discover and inspect callable forex data capabilities, review their input and output contract, and call a capability. It does not replace checks for license, freshness, limits, or price meaning.
QVeris 帮助应用或 Agent 发现可调用的外汇数据能力、检查输入输出契约并完成调用，但不会替代对授权、时效、限额和价格含义的核验。
- Search QVeris capabilities with the required dataset and workload, not only the word “forex.”
- Inspect schema and capability metadata before exposing the call to an automated workflow.
- Keep independent freshness, licensing, and error checks in the consuming application.
- 在 QVeris 能力搜索中同时说明数据集和任务，不要只搜索“外汇”。
- 把调用开放给自动化工作流前，先检查数据结构和能力元数据。
- 在消费端保留独立的时效、授权和错误验证。
FAQ
Yes. Free access may cover daily reference rates, delayed or recent quotes, selected pairs, or limited historical data. Verify the exact endpoint and license.
Sometimes, but “real-time” can mean different update intervals and data sources. Check source timestamps, delay, market status, and whether the values are executable or indicative.
Some trading-oriented APIs expose candles on free plans. Confirm intervals, history depth, timezone, missing bars, and whether the candle is derived from midpoint, bid, or ask observations.
Request a documented endpoint with a timeout, validate status and timestamps, map fields into an internal schema, then add caching, 429 handling, and freshness monitoring.
No. Exchange-rate APIs often focus on periodic reference rates and conversion. Forex market data can also include live bid/ask quotes, OHLC candles, market sessions, and higher-frequency time series.
有。免费内容可能是每日参考汇率、延迟或近期报价、部分货币对，或有限历史数据，需要核对具体端点和授权。
部分包含，但“实时”可能对应不同更新间隔和数据源。需要检查来源时间戳、延迟、市场状态和价格性质。
部分交易型 API 会开放 K 线。需要确认周期、历史深度、时区、缺失 Bar，以及 K 线由中间价、买价还是卖价构成。
设置超时调用文档端点，验证状态码和时间戳，映射到内部结构，再加入缓存、429 处理和时效监控。
不一样。汇率 API 通常面向定期参考汇率和换算；外汇市场数据还可能包含买卖报价、OHLC K 线、市场时段和更高频时间序列。