Category · Domain data
Financial market data APIs for AI agents
APIs that give prices and time series, company fundamentals and financial statements, filings, earnings, corporate actions and market news, for agents doing company research or running strategies. Compared on asset and exchange coverage, depth of history, delay on live data, licence limits on redistribution and display, and price per call or per month.
Best financial market data APIs for AI agents, the shortlist55 head-to-head comparisons
Capability keys market.prices · market.fundamentals · market.filings · market.news · market.history · market.crypto · market.indices · All tools
letme.dev/market.prices picks the top-graded tool in this list and says how to call it direct (how letme works).
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
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| 100 | Massive (formerly Polygon.io)Massive · HTTP API | Markets | BB | 73.1 | 3.5 (2) | n/a | n/a | $0.01 / call x402 | API key | Hosted | ||
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US market data API for stocks, options, indices, forex, crypto and futures, from the consolidated tapes. Top strength 24 US stock routes over x402 at agent.massive.com, $0.01 each on Base, and only successful requests are charged Top weakness 14 partial incidents from 3 August to 1 November 2026, mostly stale or missing data on stock aggregates and quotes |
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| 197 | Twelve DataTwelve Data Pte. Ltd. · HTTP API | Markets | BB | 70 | none | n/a | n/a | $29 / mo | OAuth or key | Hosted and local | ||
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Twelve Data is a market data API for prices and time series across stocks, ETFs, funds, forex, crypto and commodities, with technical indicators, fundamentals, news and filings. Agents call the REST API, the WebSocket or the hosted MCP server. Top strength OpenAPI 3.1 for 187 operations with eight documented response codes each, plus llms.txt, pricing.md and auth.md for agents Top weakness The REST docs and OpenAPI accept the key as |
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| 492 | Financial DatasetsFinancial Datasets, Inc. · HTTP API | Markets | C | 61.8 | none | n/a | n/a | $0.02 / call x402 | OAuth or key | Hosted | ||
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Financial Datasets is a stock market data API built for AI agents, with financial statements, SEC filings, earnings, insider and institutional holdings, prices, news and macro series for 27,000 US tickers, through REST, x402 and a hosted MCP server. Top strength x402 on every documented GET data endpoint (36), USDC on Base, no key or account, error responses not charged, with the price in each 402 response ($0.02 on /earnings on 3 November 2026) Top weakness No status page, incident history or published uptime; the Professional plan's SLA terms aren't public |
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| 578 | DatabentoDatabento, Inc. · HTTP API | Markets | C | 60.3 | none | n/a | n/a | $199 / mo | API key | Hosted | ||
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Databento is a market data platform with historical and live tick, order book and bar data for US and European equities, futures, options and indices, through HTTP and streaming APIs with Python, C++ and Rust clients. Top strength Per-IP rate limits published with numbers, 429 with Retry-After, and a documented error format with a code, a message and a docs link Top weakness Two critical and several major incidents on the status page in the 90 days to 3 November 2026, mostly Historical API outages and batch job delays |
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| 651 | EODHDUnicorn Data Services · HTTP API | Markets | C | 59 | none | n/a | n/a | $19.99 / mo | OAuth or key | Hosted and local | ||
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EODHD (EOD Historical Data) is a market data API from Unicorn Data Services for end-of-day and intraday prices, fundamentals, dividends and splits, filings, news, options and macro series on 60 exchanges, over REST and a hosted MCP server. Top strength Rate limits, per-endpoint call weights, Top weakness Every docs page shows the token as |
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| 879 | IntrinioIntrinio, Inc. · HTTP API | Markets | C | 54.2 | none | n/a | n/a | $150 / mo | API key | Hosted | ||
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Intrinio is a US financial data API from Intrinio, Inc. with stock prices, options, fundamentals, filings, estimates and news for US securities, through a REST API, websockets, SDKs in six languages and a hosted MCP server. Top strength Statuspage at status.intrinio.com with no incident since 24 June 2026 Top weakness The API key is documented as |
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| 1043 | BenzingaBenzinga · HTTP API | Markets | D | 49.2 | none | n/a | n/a | Paid | API key | Hosted | ||
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Benzinga is a financial news and data company whose licensed APIs serve news, earnings and ratings calendars, analyst insights, transcripts, SEC filings, fundamentals and options signals over REST, websockets and webhooks, for firms that hold a content licence. Top strength 11 OpenAPI specs in a public GitHub repository, 80 operations, with enums on the calendar and news parameters and example responses Top weakness The API token is sent only as the |
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| 1056 | Financial Modeling PrepFinancial Modeling Prep · HTTP API | Markets | D | 48.7 | none | n/a | n/a | $29 / mo | API key | Hosted | ||
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Financial Modeling Prep (FMP) is a market data API for financial statements, earnings, quotes, price history, filings, news and economic series across stocks, ETFs, funds, forex and crypto. Agents call the REST endpoints under /stable or the hosted MCP server. Top strength api-docs.md and pricing.md give agents every stable endpoint with parameters, an example response and the plan that unlocks it Top weakness The documented MCP connection URL puts the API key in the query string, and the REST docs accept |
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| 1118 | TiingoTiingo Inc. · HTTP API | Markets | D | 46.2 | none | n/a | n/a | $30 / mo | API key | Hosted | ||
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Tiingo is a market data API from Tiingo Inc. for end-of-day and real-time US equity prices, fund fees, fundamentals, dividends and splits, news, crypto and forex, over REST and WebSocket. Agents call api.tiingo.com with an account token. Top strength Changelog dated by entry from 2017 to 9 October 2026, and a stated one-year support window after a breaking change Top weakness The connecting guide documents the token as |
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| 1140 | FinnhubFinnhub · HTTP API | Markets | E | 45.1 | none | n/a | n/a | $49.99 / mo | OAuth or key | Hosted | ||
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Finnhub is a market data API for stock quotes and candles, company fundamentals, estimates, filings, transcripts, news and alternative data, with forex, crypto and economic series. Agents call the REST API at finnhub.io/api/v1 or the hosted MCP server at mcp.finnhub.io. Top strength Public Swagger 2.0 document with a description on every one of 116 operations and sample code in five languages Top weakness The Swagger document declares the key only as a |
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| 1197 | Alpha VantageAlpha Vantage Inc. · HTTP API | Markets | E | 41.5 | 3.0 (4) | n/a | n/a | $49.99 / mo | OAuth or key | Hosted and local | ||
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Alpha Vantage is a market data API for stocks, options, indices, forex, crypto, commodities, fundamentals, news sentiment, economic series and technical indicators. Agents call one REST endpoint with a function name, or the official MCP server at mcp.alphavantage.co. Top strength About 130 documented functions behind one GET endpoint, each with demo URLs and sample code in Python, NodeJS, PHP and C# Top weakness The REST key is documented only as |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
How we test this category
In this run, public evidence against the published checklist. When the task suites run, the same ten tickers asked of each listing for a year of daily closes, the last four quarterly statements and the most recent filing, the answers checked against the exchange and the regulator. We check coverage, the delay on a live quote, what a free key allows in a day and what the licence lets an agent keep. This test hasn't run yet, so Task success is pending and the grades here come from the categories assessed from public evidence.
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
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