Overledger 2.2.1 introduces support for Polygon


3 March 2022

Quant’s Overledger is the world’s first blockchain-agnostic API gateway. In version 2.2.1, we have added support for Polygon, an Ethereum-compatible network, providing faster transactions and lower costs for users. The full, standardised Overledger API is now supported on the Polygon scaling solution.

Polygon solves common blockchain pain points, offering low gas fees and high speeds without sacrificing security. To date, there are more than 6,000 dApps already using this system. In numbers, a transaction that costs traders USD 50 and takes minutes on Ethereum, now costs less than a cent and is instantaneous on Polygon.   

All Overledger functions available for Ethereum can now be performed on Polygon testnet, such as creating a MATIC transaction, searching, monitoring an address and more. Support for Polygon mainnet will be available shortly.

Polygon integration is part of Quant’s product roadmap for Overledger, providing seamless interoperability of smart tokens across multiple DLTs and blockchains.

Please see the Release Notes for full details of the changes in version 2.2.1.
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Overledger 2.x

Overledger 1.x


OAuth 2.0 standard (allowing SSO)

Proprietary (BPI Keys)


In API, seamless updates

In SDK, re-download for updates


Full abstraction across all DLTs

Partial, DLT-specific edge cases

RCG Framework

REST / JSON APIs from OVL Core

Proprietary P2P (experimental)

Time to Deploy

32 minutes (CI / CD pipelines)

1-2 weeks

QNT Utility Token / Treasury

Optimised, audited smart contracts

Experimental smart contracts


Optimised to scale fast – 23 Microservices

Hardened proof of concept
– 9 Microservices

Transaction Routing Algorithm

6 factor, game theory optimised

Experimental P2P emergent


Cloud native (scaling / resilience)

Standalone DB deployments

Cross-DLT Implementation

REST API calls direct to OVL, integrated smart contract back end

SDK-based Javascript 
apps call smart contract functions
via OVL

2021 Achievements

50% Quant team has grown by over 50% and will continue to do so 

OVL1.0 to 2.0 Release schedule accelerated, moved to much more frequent automated updates
– Previously, last major update was seven months, then in early 2021 moved to three months (Jan and March)
and then to monthly (April and May). We’re now moving to fortnightly releases. 

2.5X Overledger is now 2.5x bigger (April)  

2.0 Re-engineered the entire 2.0 architecture

Open API 3.0 for easy integration into developer workflows

OAuth 2.0 for single sign on for enterprise customers    

Cloud Native Scalable and resilient already, now deployable automatically 

Native Transactions 

OVL 2.0 Developer portal 2.0