Changeblock provides a fully-featured digital asset marketplace for web3 users. You can purchase or bid for digital environmental attributes completely over the blockchain. You can use your favourite webwallet (including metamask, Trust and many others) to transact directly with the marketplace.
The marketplace is peer-to-peer, connecting vendors directly with buyers, and any tokens available for sale are locked at the marketplace contract. Changeblock provides a front-end supporting common webwallets as well as WalletConnect.
For technical information on interacting with the marketplace without using our website (for example for automated purchase, or purchasing from a smart contract, please see the technical docs for this product here:
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://docs.changeblock.com/changeblock-documentation/solutions/environmental-attributes/exchange/web3.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.