Last updated: 30 July 2026
VISIALIS, SAS with share capital of €200,000, registered with the Paris Trade Register under number 478 885 122,
BUREAU 326, 59 rue de Ponthieu, 75008 Paris, France.
Data protection contact: contact@visialis.fr.
Alter currently operates locally, without a user account, a VISIALIS-operated RPC endpoint, or a remote MCP endpoint hosted by VISIALIS. Analyses, configurations and ownership proofs stay on the device unless a feature requested by the user requires direct communication with a third-party service described below.
In the standard local flow, EVM addresses viewed, JSON-RPC parameters and wallet signatures are not sent to VISIALIS. Alter does not hold private keys and never asks users to disclose a recovery phrase.
For contractual matters, please review the Terms of Use.
VISIALIS receives personal data only when a user voluntarily provides it, for example in a support message. This data may include the sender’s contact details, the content of the request and any attached technical material.
This data is used to answer the request and to secure or improve the service. Depending on the context, processing is based on performance of the request or VISIALIS’s legitimate interest in providing support and security. Support material is retained for as long as necessary to handle the request, and thereafter only for periods required by law or necessary for the establishment, exercise or defence of legal claims.
The Web application is a static site hosted by GitHub Pages, a service provided by GitHub, Inc. Loading the application requires a connection to GitHub’s servers. GitHub states that it logs and stores the IP addresses of GitHub Pages visitors for security purposes, even when they are not signed into a GitHub account. This processing is governed by the GitHub Privacy Statement.
The application code does not send the EVM addresses viewed, RPC parameters or signature proofs to the hosting server. VISIALIS does not operate an application proxy on this route.
Alter routes requests directly from the device to the services required for the requested feature. VISIALIS does not intercept these communications. Depending on the features used, recipients may include:
These third parties necessarily receive the connection IP address and the data included in the request. An RPC or explorer request may disclose the EVM addresses queried, the method called, the network, Alter’s technical identifier where permitted by the browser and, for an explorer, the API key supplied by the user.
Users remain free to replace or remove suggested endpoints and use their own providers. VISIALIS does not control the policies, retention periods or processing locations of providers selected by users. Some may process data outside the European Economic Area. Users should review their privacy policies before use.
A public blockchain address, transaction and on-chain data may be linked to a person and remain publicly accessible for an extended period. VISIALIS cannot modify or erase data already recorded on a blockchain.
CLI and MCP tools exposing the transaction.prepare prototype may append a public ERC-8021-format attribution marker to an unsigned payload; the proposal remains in draft status. Alter does not publish this marker itself. It becomes public only if the user has the payload signed by an external signer and then broadcasts the transaction. The Web application does not currently offer a workflow for preparing or publishing this marker.
Alter uses device storage to provide requested features and remember, in particular, language, onboarding status, dismissed notices, settings and RPC endpoints, technical counters, history-import status and, if entered by the user, an explorer API key. Session data, addresses, results or proofs may also remain locally depending on the interface used.
The explorer API key is stored locally without encryption and is sent only to the explorer API when the corresponding feature is used. Users should use a dedicated key and may delete it from the settings.
Alter’s code does not place advertising cookies and does not include analytics or behavioural tracking tools. Functional local storage is used to provide requested features. Users may clear it through the application where a control is available, or through browser or system settings; doing so may reset the application.
VISIALIS recommends using trusted RPC endpoints, explorers and wallets, never entering a private key or recovery phrase into Alter, and checking the data displayed by the wallet before signing. If there is any doubt about a third-party service, users should remove it from their configuration.
For data actually held by VISIALIS, including support requests, individuals may request access, rectification, erasure, restriction or object where these rights apply by contacting contact@visialis.fr. They may also lodge a complaint with the French data protection authority, the CNIL.
Data stored only on the device is under the user’s control. Requests concerning GitHub Pages logs, an RPC provider, an explorer or a wallet must be addressed to the relevant third party. Deleting local data cannot remove data already published on a blockchain.
This policy is updated when processing activities or the legal framework change. If VISIALIS introduces an RPC endpoint, a remote MCP endpoint, an account, a payment feature or another hosted mode, the new processing activities, legal bases, retention periods, recipients and rights will be documented before activation and brought to users’ attention.