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Ink Protocol (XNK)


Ink Protocol is a Decentralized reputation and payments for peer-to-peer marketplaces.

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Project industryFinance Services & Banking
Product typeEcosystem
FoundedUnited States

Technical details

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What is Ink Protocol

Ink Protocol is developed by Listia, a P2P marketplace for buying and selling used goods online. Launched in 2009, the marketplace now has over 10 million registered users who have exchanged 100 million items. The company has raised $11MM in venture capital from prominent investors.

Listia will be introducing a new decentralized reputation and payment system called Ink Protocol (“Ink”), which is powered by the Ethereum blockchain and XNK, an ERC20 compatible token. Ink helps users safely send and receive payments in P2P marketplaces while earning public reputation for every completed transaction. It greatly enhances the buying/selling process with decentralized reputation and feedback ratings, decentralized escrow for secure payments, third party dispute resolution, and very low transaction costs.

Ink can be integrated into new or existing marketplaces and can also be used in marketplaces that don't directly handle payments (eg, Craigslist and Facebook Marketplace). For sellers, accepting Ink builds up their public reputation, which allows them to start selling quickly on new marketplaces without needing to build reputation from scratch. Buyers can view any seller's reputation across multiple marketplaces and confidently pay using either automated or human-mediated escrow contracts. Payments can be made and received natively using the Ink Protocol Token (XNK) or converted easily to and from fiat currencies like USD.

Ink will also become the new reputation and payment system within the Listia marketplace. Listia currently uses a centralized virtual currency called Listia Credits for all transactions. Existing users with Listia Credits will have their balances converted to XNK, providing Ink with a tremendous boost for initial usage, stability, and network effects on day one. Additionally, Listia will create a standalone payments app so users of local marketplaces such as Craigslist and Facebook Marketplace can build reputation and start using Ink right away. With large scale adoption and apps that can be used in multiple marketplaces at launch, Ink is well situated to become the preferred reputation and payment system in all P2P marketplace transactions.


Pre-sales: Jan 22, 2018 - Jan 31, 2018
Public sales: Feb 01, 2018 - Feb 28, 2018
Token supply: 500,000,000 XNK
Hard cap: 15,000,000 USD
Raised: 15,000,000 USD


Blockchain Platform: Ethereum
Country limitations: Canada, China, Taiwan, United States
Registration country: United States
Registration year: 2009
Office address: 200 Blossom LaneMountain View, CA 94041United States

Token info

Ticker: XNK
Type: Utility-token
Token standard: ERC-20
Token price in USD: 1 XNK= 0.1395303 USD
Token price in ETH: 1 XNK = 0.000133 ETH
Accepted currencies: ETH
Bonus program:
FULL Presale Tier 1: 1 ETH = 9,375 XNK (20% discount)
FULL Presale Tier 2: 1 ETH = 8,825 XNK (15% discount)
Presale Tier 3: 1 ETH = 8,350 XNK (10% discount)
Token distribution:
6% - reserved for existing Listia User Credits
30% - sold in presale and public token sale
32% - retained by Listia, vested over 3 years
32% - allocated for distribution and incentivizing the network, released over 3 years

Ink Protocol Roadmap

June 2009

Listia Inc. is founded and receives funding from Y Combinator

August 2009

The Listia marketplace launches

October 2009

Listia announces $400K angel round

April 2011

Listia launches iOS app, announces $1.75MM seed round led by A16Z

January 2012

Listia reaches 1M registered users, launches Android app

January 2013

Listia partners with Best Buy to power the Listia Rewards Store

October 2013

Listia announces $9MM series A led by General Catalyst

February 2014

Listia allows Bitcoin to be bought and sold in the marketplace

November 2014

Listia first experiments with creating a cryptocurrency

December 2015

Listia launches the Credit Exchange, allowing sellers to earn USD

April 2016

Listia launches Credits + Cash feature

June 2016

Listia launches Listia Plus

September 2016

Listia integrates shipping labels and tracking

May 2017

Listia hits 10M registered users

June 2017

Listia begins work on Ink Protocol design and whitepaper

September 2017

Listia publishes website and Ink Protocol whitepaper

November 2017

Listia introduces the Ink Protocol project publicly

February 2018

Ink Protocol network goes live and ready for everyone to use!

February 2018

Launch XNK integration

March 2018

Kleros partnership announcement

March 2018

Bounty0x partnership announcement

March 2018

Sharetribe partnership announcement

March 2018

Developer Portal launch (

Q2 2018
  • Launch Ink Pay App and Ink Pay partnerships
  • Marketplace partnerships
  • Consumer app partnerships
  • Shipping and logistics partnerships
  • Launch first live integration with consumer app partners
  • Create a developer community around the Ink Developer Portal and Gitter
  • 26
    Q3 2018
  • Start work on enabling additional cryptocurrency payments
  • Launch easy reputation viewer / browser
  • Start feedback and reputation importer for existing marketplaces
  • Start work on fiat payments integration
  • 27
    Q4 2018
  • Launch Ink Pay Checkouts feature
  • Start work on marketplace plugins for forums and message boards
  • Start work on marketplace plugins for online stores
  • Integrate local marketplaces and other marketplace verticals into Ink Pay
  • 28
  • Launch fiat marketplace payments through Replin via PayPal partnership
  • Build out a platform for selling on Twitter, Instagram, FB Marketplace via Replin
  • Integrate Replin into new marketplaces, forums, message boards, classifieds, consumer apps
  • Create a widget for 3rd party marketplaces to display Replin reputation for their users
  • Add support for additional currencies in Replin to support international usage
  • Focus on perfecting user engagement, and find product-market fit in Q2/Q3
  • Focus on growth and scaling of Replin users and transaction volume in Q3/Q4
  • Launch additional cryptocurrency payments through Ink Pay
  • Build Replin integrations for open e-commerce platforms that support Apps and Plug-ins
  • 29
    Goals for 2020 and beyond
  • Grow Ink Protocol to be THE STANDARD way to buy and sell on any platform, while earning public reputation for every transaction.
  • Replin will handle the regular money payments via PayPal and Ink Pay will handle the cryptocurrency payments.
  • Sellers will earn Ink reputation everywhere they sell and use it for instant credibility on all marketplaces and for all p2p transactions.
  • Buyers will demand that sellers have Ink reputation, which they can look up via dozens of apps and websites quickly and easily.
  • There will be hundreds of distributed mediators and mediation services available to choose from when dealing with a peer-to-peer transaction.
  • Buyers and sellers will feel safe and secure when transacting online with strangers, both within and outside of any established marketplaces.
  • Decentralized marketplaces built on Ink Protocol will emerge and thrive.
  • Project team

    Gee-Hwan Chuang
    Gee-Hwan Chuang
    CEO & Co-founder
    Gee-Hwan Chuang linkedin
    James Fong
    James Fong
    Co-founder & President
    James Fong linkedin
    Gee-Hsien Chuang
    Gee-Hsien Chuang
    Head of Product
    Gee-Hsien Chuang linkedin
    Ngan Pham
    Ngan Pham
    Ngan Pham linkedin
    Charles Huang
    Charles Huang
    Mobile Developer
    Charles Huang linkedin
    Xenor Chang
    Xenor Chang
    Xenor Chang linkedin
    Lake Chang
    Lake Chang
    Lake Chang linkedin
    Jerry Chen
    Jerry Chen
    Jerry Chen linkedin
    Natalie Acosta
    Natalie Acosta
    Member Support
    Ricky Lugonja
    Ricky Lugonja
    Member Support
    Ricky Lugonja linkedin
    Ashton Lauren
    Ashton Lauren
    Member Support
    Ashton Lauren linkedin


    Samuel Smith
    Samuel Smith
    Samuel Smith linkedin
    Philip Krim
    Philip Krim
    Philip Krim linkedin
    Richard Ma
    Richard Ma
    Richard Ma linkedin
    Lester Lim
    Lester Lim
    Lester Lim linkedin

    Social media

    Ink Protocol web-siteInk Protocol MediumInk Protocol TelegramInk Protocol LinkedInInk Protocol Twitter

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