Refinitiv (LSEG) Financial Data API
Refinitiv (now LSEG Data & Analytics) REST APIs for institutional financial data platform. Enables AI agents to manage real-time and historical market data retrieval across equities, fixed income, FX, and derivatives, handle company fundamental data and financial statements for equity research, access news and events data from Reuters News for market intelligence and sentiment analysis, retrieve ESG data and scores for responsible investment analytics, manage fixed income pricing and analytics including yield curves and credit spreads, handle alternative data including insider transactions, options flow, and short interest, access tick data and high-frequency market data for quantitative research, retrieve global exchange data and corporate actions for portfolio management, manage company filing and regulatory document retrieval, and integrate financial data with trading, risk, and portfolio management systems.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Financial market data. SOC2, MiFID2, GDPR. OAuth2. US/EU. Market, news, and reference data.
⚡ Reliability
Best When
An institutional investor, bank, or fintech using Refinitiv/LSEG data wants AI agents to automate market data retrieval, fundamental analysis, news sentiment, ESG scoring, and financial research workflows.
Avoid When
LICENSING RISK: Refinitiv/LSEG market data has strict redistribution restrictions tied to exchange data licenses — real-time data redistribution requires exchange-specific licensing. AI model training on Refinitiv data requires specific data licensing terms. Automated investment decisions based on data require compliance review for investment advisor regulations.
Use Cases
- • Retrieving real-time market data from algorithmic trading agents
- • Accessing Reuters news from market intelligence agents
- • Analyzing fixed income yields from bond portfolio agents
- • Retrieving ESG scores from responsible investment agents
Not For
- • Consumer-grade financial data without institutional licensing
- • Simple price checking without comprehensive financial data depth
- • Non-financial services without market data licensing obligations
Interface
Authentication
LSEG (formerly Refinitiv) uses OAuth 2.0. Developer portal at developers.lseg.com. Rebranded from Refinitiv to LSEG (2023, after LSE acquisition). Open-source SDKs on GitHub (Refinitiv). Streaming API via WebSocket for real-time data. REST API for historical and reference data. Webhooks for alerts and events. London, UK HQ.
Pricing
London, UK. Thomson Reuters financial data spun off as Refinitiv (2018). Acquired by LSEG (2021, $27B). LSEG Data & Analytics division. $6B+ annual revenue from data. Eikon terminal alongside API. Reuters News partnership. Strong in FX, fixed income, and institutional equity. Competes with Bloomberg for institutional market data.
Agent Metadata
Known Gotchas
- ⚠ LICENSING RISK: Exchange-specific data licenses required for real-time redistribution; verify exchange entitlements for each market in your data strategy
- ⚠ LSEG rebrand — Refinitiv acquired by LSEG (2021); developer portal migrated from refinitiv.com to developers.lseg.com; update documentation references
- ⚠ Eikon vs. API — Eikon terminal and REST API have different data access patterns; some Eikon features (Excel Add-In, App Studio) are not available via pure REST
- ⚠ Real-time vs. REST — real-time streaming data uses WebSocket (RTSDK/EDP RTO); REST API handles historical and reference data; use appropriate interface for each use case
- ⚠ Exchange delay licensing — delayed data (15-minute) has different licensing than real-time; verify delay tier for your use case
- ⚠ News licensing — Reuters News data has separate content licensing from market data; news redistribution or display requires news content license review
Alternatives
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Scores are editorial opinions as of 2026-03-07.