WalletWhistle tracks product prices, stores price history, and lets users browse merchants, categories, alerts, and connected tools such as the WalletWhistle MCP endpoint.
This policy explains what information is processed when you browse the site, create an account, sign up for alerts, or use WalletWhistle through connected tools.
Last updated: 5 April 2026
WalletWhistle mainly stores product, merchant, category, and price-history data. If you create an account, subscribe to alerts, or contact us, we may also store information you provide such as your email address, login details, and watch or alert preferences.
Like most sites, we and our infrastructure providers may record technical request data such as IP address, browser or client details, referring page, timestamps, requested URLs, and diagnostic identifiers needed for security, fraud prevention, uptime monitoring, and troubleshooting.
WalletWhistle MCP tools are designed to return public product, merchant, category, and price-history information without requiring a WalletWhistle account. If operational logging is enabled for security, abuse prevention, or debugging, technical logs may include request metadata such as tool name, request method, request timing, user agent, IP address, forwarded headers, content type, Cloudflare Ray ID, and limited request previews needed to diagnose failures or abuse.
We use information to operate the site, maintain price histories, send requested alerts, authenticate users, improve reliability, investigate technical problems, and protect the service from misuse.
WalletWhistle uses third-party services for hosting, security, analytics, authentication, and merchant linking. Those providers may process technical request data in line with their own systems and policies.
WalletWhistle may use affiliate links when sending you to merchant sites. When you click through, the merchant, affiliate network, or tracking provider may receive technical and referral data needed to attribute that visit or sale.
WalletWhistle offers MCP tools that can be used through compatible clients such as Claude, ChatGPT, and other MCP-enabled software. These tools query WalletWhistle's public catalogue, merchant, category, and price-history data and do not require a WalletWhistle account, payment details, or profile information.
We do not use MCP requests to build advertising audiences or customer profiles. Please do not submit sensitive personal data through MCP prompts, tool arguments, or connected apps. If operational logging is enabled, WalletWhistle may temporarily process limited technical request data needed to operate, secure, or debug the MCP service.
When you use WalletWhistle through a third-party MCP client, that client provider may also process your prompts, tool calls, and results under its own terms and privacy policy. WalletWhistle only needs the request data required to answer the tool call and run the service.
WalletWhistle and its providers may use cookies or similar technologies for session handling, authentication, analytics, security, and site functionality. The MCP transport is separate from normal website browsing, but the WalletWhistle website and third-party MCP clients may still use their own cookies, local storage, or similar technologies. If you block cookies, parts of the site or connected experiences may not work correctly.
We keep information for as long as it is reasonably needed to run the service, maintain records, resolve disputes, comply with legal obligations, and investigate abuse or failures. Technical logs may be trimmed or deleted on a rolling basis.
WalletWhistle is not intended for children, and the site and MCP service are not designed for sensitive personal data. Do not submit payment card details, government IDs, health data, or other confidential information through WalletWhistle or its connected tools.
If you need help with account data, alert preferences, or privacy questions, use the contact details on the Contact page. We may update this policy from time to time by posting a revised version here.