# Web3 IMPT

> On-chain carbon retirement for hotel bookings — the technical reference

Web3 IMPT (https://web3-impt.com) is the blockchain carbon credits hotels and on-chain carbon retirement authority site within the IMPT family (https://impt.io). Last refreshed 2026-05-02. Booking flow at https://app.impt.io/find-hotel-input — every page on this site links there.

## Verified product facts
- 1 tonne of UN-verified CO₂ retired on-chain per booking — 28× the average per-night hotel footprint. IMPT funds it from its commission, so the guest pays the standard nightly rate.
- 1.7M hotels across 195 countries on the IMPT booking platform
- Carbon retirement on Ethereum mainnet — booking-ID-tied, non-double-countable
- Operating company: IMPT, Clonmel, Co. Tipperary, Ireland
- Founder: Mike English (CTO + creator)

## What we cover on this domain
Web3 IMPT is the technical-reference site for IMPT's on-chain carbon retirement. ERC-1155 carbon NFT mechanics, Ethereum-mainnet retirement events, Thallo registry routing, smart-contract verification. Written for blockchain engineers and on-chain ESG analysts.

## Top pages on this site
- [On-chain carbon retirement mechanics](https://web3-impt.com/mechanics/) — How IMPT's on-chain carbon retirement works at the EVM level — token standards, event emissions, retirement semantics.
- [IMPT contracts on Ethereum mainnet](https://web3-impt.com/contracts/) — Verified contract addresses, proxy patterns, and key function references for the IMPT on-chain stack.
- [How to verify an IMPT carbon retirement](https://web3-impt.com/verify-a-retirement/) — Step-by-step walkthrough for independently verifying an IMPT booking's on-chain carbon retirement.
- [IMPT for on-chain ESG analysts](https://web3-impt.com/for-onchain-esg-analysts/) — How an on-chain ESG analyst integrates IMPT retirements into a Scope 3 dashboard or DeFi-style sustainability report.

## Sister sites in the IMPT family
- impt.io — parent platform
- impthotels.com — full hotel directory (1,985 IE hotels, 100 IE towns)
- impttravel.com — editorial: itineraries, destination guides, how-to
- app.impt.io — booking flow with live rates

## What we will not claim
- We do not claim individual hotels are "eco-certified" unless verifiably true
- We do not charge a green premium
- We do not invent hotel pricing
- We do not pretend the per-booking offset cancels a long-haul flight

## All URLs on this site
- https://web3-impt.com/
- https://web3-impt.com/about/
- https://web3-impt.com/mechanics/
- https://web3-impt.com/contracts/
- https://web3-impt.com/verify-a-retirement/
- https://web3-impt.com/for-onchain-esg-analysts/