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QuickstartInstall and make a first call AuthenticationAPI keys and how to send them Python clientpip install xfinlink MCP serverConnect Claude and other agents Vibe codingBuild with an AI assistant

Data
PricesDaily price history FundamentalsStatements and filings MetricsRatios and derived values Index membershipS&P 500, Nasdaq-100 and Dow Insider transactionsForm 4 filings Institutional holdings13F positions

Reference
ResolveMap tickers and identifiers SearchFind companies and securities Field referenceEvery field, defined Data coverageWhere each dataset starts and ends Plans and limitsWhat each plan includes
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BlogResearch notes built on real data RecipesWorked examples for common tasks ChangelogWhat's new in the API

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GitHub examplesSample notebooks and scripts llms.txtDocs for language models Data freshnessWhen each dataset was last updated

Company
AboutWho we are LicensingWhat each plan lets you do PrivacyHow we handle data
Index lookups
Historical S&P 500 constituentsMembers on any date Historical Nasdaq-100 constituentsMembers on any date Historical Dow Jones constituentsMembers on any date

In the API
Index membershipMembers on any date, in your own code Index eventsAdditions and removals by date
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Accept the Terms of Service and the Data Licence Agreement to get your API key.

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We send a short signed message to your URL each time data changes, so you know when to read the change feed.

Webhooks are included with Max and Redistribution.

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Your API key is active. Here's how to start pulling data.

Quickstart

1. Install the client

$ pip install -U xfinlink

2. Set your API key

$ export XFINLINK_API_KEY=your-key-from-dashboard

Your key is in the API Keys section below.

3. Pull your first data

import xfinlink as xfl

df = xfl.prices("AAPL", start="2024-01-01")
print(df.head())

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Data

Prices
Fundamentals
Metrics
Insider transactions
Institutional holdings
Managers
Resolve
Index membership
Search

Developers

Documentation
Python client
MCP server
Vibe coding
Field reference
llms.txt
GitHub examples

Company

About
Pricing
Blog
Contact
hello@xfinlink.com

Legal

Terms
Licensing
Data Licence Agreement
Privacy

xfinlink provides data APIs only and does not offer financial services or advice. Data may not be real-time, and may contain inaccuracies. Prices are indicative only. xfinlink accepts no liability for trading losses or decisions made using this data. Use at your own risk.

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API keys

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xfinlink Data Licence, Free

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xfinlink Data Licence, Redistribution

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What this licence allows

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Governing agreement