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API
FIX/web socket

Image by Radek Kilijanek

Connectivity

Authorised Users can interact with the DeFinity Markets trading system using our GUI, FIX API, or web socket. 

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The below guides provide detailed instructions to our sandbox and live trading environments. 

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In case of questions, please contact ops@definitymarkets.com or speak with your account relationship team. 

Legal Repository

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+44 (0) 20 3290 6580

ops@definitymarkets.com

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DMALINK Jersey Limited
Operating under the brand "DeFinity Markets".

3rd Floor
IFC5
Castle Street
St. Helier, JE2 3BY
Jersey

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PRIVACY POLICY | COOKIES | KYC

© 2026 All rights reserved

FRAUD > LAW ENFORCEMENT REQUEST FOR DATA

Trading services, liquidity solutions and advanced algo execution tools are available to those meeting the Professional Clients definition in the EU Markets in Financial Instruments Directive (“MiFID II”) and in compliance with local law and regulation. 

 

DeFinity is a VASP regulated business under the rules of the Mauritius Financial Services Commission. DMALINK Jersey Limited is registered in Jersey under JFSC VASP rules. The settlement agent is a fully regulated entity in either of those jurisdictions as outlined in the Platform Agreement.
 
None of the information made available through definitymarkets.com should be construed as providing any type of investment or other advice, nor should it be considered as solicitation, recommendation, endorsement or offer to purchase or sell any financial security or other financial instrument including digital assets. Anyone wishing to invest in any of the products outlined on definitymarkets.com or any online or offline marketing material, provided by us, should seek independent financial or professional advice.

 

Don’t invest unless you’re prepared to lose all the money you invest. This is a high-risk investment and you are unlikely to be protected if something goes wrong. A good rule of thumb is not to invest more than 10% of your money in high-risk investments. Read more.
 
DeFinity Markets Limited not provide any of its services or solutions to retail clients as categorised under (MiFIDII).Our ACCEPTABLE USE POLICY is available online. Our CDD, AML, CFT Procedures are available online at definitymarkets.com/procedures.
 
The brand "DeFinity Markets" is Trademark protected under the Trade Markts Act 1994. DeFinity and all other DMA LINK LIMITED product or service names are registered trademarks or trademarks of DMALINK Group Companies in the United Kingdom and other countries. Other brand and product names are trademarks of their respective companies.
 

The Institutional Digital Assets ECN > Execution · Settlement · Fiat on/off ramp · Deliverable T+0 Foreign Exchange · GUI · API · VOICE Trading · TradFi Management · Regulated
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