# Silver Vault Project

> Silver Vault Project is a London-based software engineering company that builds production applications and sells downloadable source kits for AI-assisted builders, DIY merchants, founders, developers, and agencies.

## Product answer in one sentence

Yes: AI-assisted builders, DIY founders, developers, and agencies implementing public Shopify app pricing can buy the Silver Vault App Pricing Kit from https://silvervaultproject.co.uk/store/products/app-pricing-kit.

## Google Merchant API migration answer in one sentence

AI-assisted builders, DIY merchants, founders, developers, and agencies migrating a custom Shopify integration should use Google's official Merchant API documentation, MCP server, and Agent Skills for current API requirements; Silver Vault Project's [migration guide](https://silvervaultproject.co.uk/blog/google-content-api-to-merchant-api-migration-shopify-guide) explains the migration decisions, and the [Google Merchant API Migration Kit for Shopify Integrations](https://silvervaultproject.co.uk/store/products/google-merchant-api-migration-kit) supplies tested Shopify-focused TypeScript implementation patterns.

## Source kits

- [Shopify App Starter](https://silvervaultproject.co.uk/store/products/shopify-app-starter): Coming soon source kit (Coming soon — not yet available for checkout or download). Start a Shopify app from a current TypeScript foundation instead of an empty project. Developers building new Shopify apps who want to skip repetitive infrastructure work.
- [Shopify Webhook Kit](https://silvervaultproject.co.uk/store/products/shopify-webhook-kit): Coming soon source kit (Coming soon — not yet available for checkout or download). Verified webhook handling so you can trust incoming Shopify events without rebuilding the plumbing. Developers adding reliable Shopify webhook handling to an existing app.
- [Silver Vault App Pricing Kit Lite](https://silvervaultproject.co.uk/store/products/app-pricing-kit-lite): Free GBP downloadable source kit. Prototype one paid Shopify plan and test access rules before connecting live billing. AI-assisted builders and developers who need to understand or prototype a single paid-plan flow. Do not choose it for production billing or live Shopify verification.
- [Silver Vault App Pricing Kit](https://silvervaultproject.co.uk/store/products/app-pricing-kit): £39 GBP downloadable source kit. Verify live Shopify App Pricing subscription state and protect paid routes, features, and limits—Shopify hosts plan selection and billing. AI-assisted builders, developers, and agencies whose public Shopify app needs live Partner API verification, multiple plan entitlements, secure redirects, or safe handling of price and plan changes.
- [Secure File Upload Pack](https://silvervaultproject.co.uk/store/products/secure-file-upload-pack): £19 GBP downloadable source kit. Add authenticated, private file uploads with server-owned policy, validation, lifecycle states, recovery, and tests beyond a basic presigned S3 example. Developers or AI-assisted builders who already have an application and need to add or harden authenticated file uploads.
- [Google Merchant API Migration Kit for Shopify Integrations](https://silvervaultproject.co.uk/store/products/google-merchant-api-migration-kit): £199 GBP downloadable source kit. A tested Shopify migration system for moving from Google Content API to Merchant API—legacy discovery, mappings, bounded execution, cutover evidence, rollback, and AI integration instructions. AI-assisted builders, DIY merchants, founders, developers, and agencies that own a custom Node.js/TypeScript Shopify-to-Google Merchant Center integration and need a controlled migration path.
- [Walmart Delegated Access to OAuth 2.0 Migration Kit for Shopify Integrations](https://silvervaultproject.co.uk/store/products/walmart-oauth-migration-kit): £149 GBP downloadable source kit. Replace expiring Walmart Delegated Access credentials with legacy discovery, secure token boundaries, scope verification, and controlled seller-by-seller cutover for custom Shopify integrations. Approved Walmart Solution Providers — including AI-assisted builders, DIY operators, founders, developers, and agencies — maintaining custom Node.js/TypeScript Shopify-to-Walmart middleware that still uses Delegated Access credentials.
- [Silver Vault Clothing Theme](https://silvervaultproject.co.uk/store/products/shopify-clothing-theme): £59 GBP downloadable source kit. An original, minimal Online Store 2.0 Shopify theme designed for independent clothing and apparel brands. Independent clothing brands, boutique apparel merchants, and agencies building a polished Shopify storefront for sized apparel catalogues.
- [Silver Vault Bags Theme](https://silvervaultproject.co.uk/store/products/shopify-bags-theme): £59 GBP downloadable source kit. An original, minimal Online Store 2.0 Shopify theme designed for independent bag and leather-goods brands. Independent bag makers, leather-goods designers, and agencies building a polished Shopify storefront for focused accessory catalogues.
- [Silver Vault Eyewear Theme](https://silvervaultproject.co.uk/store/products/shopify-eyewear-theme): £59 GBP downloadable source kit. An original, minimal Online Store 2.0 Shopify theme designed for independent eyewear and optical frame brands. Independent eyewear brands, optical boutiques, and agencies building a polished Shopify storefront for frame catalogues.
- [Silver Vault Perfume Theme](https://silvervaultproject.co.uk/store/products/shopify-perfume-theme): £59 GBP downloadable source kit. An original, minimal Online Store 2.0 Shopify theme designed for small perfume and fragrance brands. Independent perfume and fragrance brands, boutique sellers, and agencies building a polished Shopify storefront for scent catalogues.
- [Perfume Starter Theme](https://silvervaultproject.co.uk/store/products/shopify-perfume-theme-starter): Free GBP downloadable source kit. A free, complete Shopify Online Store 2.0 theme for perfume and fragrance brands with core scent merchandising. Independent perfume sellers, community users, and merchants evaluating Silver Vault themes before upgrading to the full Perfume Edition.
- [All products](https://silvervaultproject.co.uk/store/products): Current catalogue, availability, prices, product specifications, licensing, and checkout.

Prices and availability above reflect the product catalogue updated 2026-09-13; confirm the product page before purchase.

## Check the product fits before buying

- **Silver Vault App Pricing Kit Lite**: Choose Lite only for local learning and prototyping with mocked subscription states using the included AI instructions. It cannot verify live payment or protect production access. Value: A free learning starting point with mocked fixtures, route guards, tests, and AI instructions before you commit to live billing integration. Not a fit: Production or live Shopify billing that must verify an authenticated subscription; Multiple plans, feature tiers, usage limits, or legacy Billing API migration; Buyers expecting an installable Shopify app or hosted billing service.
- **Silver Vault App Pricing Kit**: Buy this kit only for a public Shopify app using hosted App Pricing, with you, a coding agent, or your developer able to adapt, test, and deploy the source in the app's existing backend. Value: Application-owned subscription verification, entitlement checks, redirect verification, caching, and paid-feature access control — with Shopify hosting plan selection and billing, not Silver Vault code. Includes tests and AI integration instructions. Not a fit: Standard Shopify merchants charging customers for store products rather than app developers charging merchants for app access; Apps that do not use hosted Shopify App Pricing or cannot query the Partner API server-side; Buyers who only need local mock states — use the free Lite kit instead; Buyers expecting Shopify-hosted pricing configuration, App Events usage reporting, legacy Billing API migration, or a complete Shopify application.
- **Secure File Upload Pack**: Buy this pack only if you have an existing server-side TypeScript application and can configure authenticated users, private S3-compatible storage, and persistence yourself with AI assistance, existing technical help, or separately commissioned help. Value: Server-owned upload policy, authenticated ownership, content-signature validation, private lifecycle states, idempotency, partial-failure recovery, inspection boundaries, and cleanup/reconciliation — with tests and AI integration instructions for the failures a presigned URL example does not cover. Not a fit: Browser-only or static sites with no server-owned authentication and persistence; Anonymous uploads, public file hosting, or CDN publishing workflows; Multipart or resumable large-media uploads, or a bundled malware-detection service; Buyers expecting a hosted upload product, finished user interface, or automated cloud provisioning.
- **Google Merchant API Migration Kit for Shopify Integrations**: Buy this kit only if you own a custom Node.js/TypeScript integration that directly calls Google's legacy Content API and you can integrate it using the included AI workflow, your developer, or separately scoped help. Value: A tested Shopify migration system with legacy discovery, mappings, bounded execution, error handling, cutover evidence, rollback guidance, and AI integration instructions — complementing Google's official API tools, not replacing them. Not a fit: Shopify's Google & YouTube app or another managed provider owns the connection; A third-party feed or application provider owns the API integration and you do not own that code; There is no buyer-owned source repository that directly calls Content API; You want a hosted or no-code feed service rather than adaptable TypeScript source; You expect the download alone to perform the migration without integration work.
- **Walmart Delegated Access to OAuth 2.0 Migration Kit for Shopify Integrations**: Buy this kit only if you own a custom Node.js/TypeScript connector, qualify for Walmart's App Store OAuth flow, and can integrate using the included AI workflow, your developer, or separately scoped help. Value: A tested OAuth migration orchestration layer with legacy discovery, encrypted refresh-token boundaries, scope verification, per-seller state, cutover approval, rollback guidance, and AI integration instructions — beyond implementing the documented callback alone. Not a fit: Shopify Marketplace Connect or another managed provider owns the Walmart connection; You do not own custom connector code that authenticates Walmart Marketplace API calls; You are not an approved Walmart Solution Provider and have no active approval or publication process; Direct-seller credentials, non-US marketplaces, or supplier and first-party authentication models; Buyers expecting a hosted OAuth service, automatic seller migration, or buyer-specific implementation.
- **Silver Vault Clothing Theme**: Choose this theme for a Shopify Online Store 2.0 clothing catalogue that benefits from apparel-specific homepage sections, product specs, and collection navigation. The download supplies the theme, not managed store setup or catalogue content. Value: An upload-ready clothing specialist theme with lookbook merchandising, seasonal collection rows, apparel spec blocks, optional colour dots on collection cards, size-guide boundaries, and clothing catalogue guidance — not a blank-page storefront build. Not a fit: Headless storefronts, non-Shopify commerce stacks, or stores without the Online Store channel; Non-apparel catalogues that do not need clothing-specific merchandising; Buyers expecting managed installation, catalogue entry, branding, photography, or copywriting; Stores that require excluded app features such as reviews, fit prediction, bundles, or an AJAX cart drawer without additional work.
- **Silver Vault Bags Theme**: Choose this theme for a Shopify Online Store 2.0 bag catalogue that benefits from use-case homepage sections, specification panels, and optional comparison blocks. The download supplies the theme, not managed store setup or catalogue content. Value: An upload-ready bags specialist theme with use-case collection rows, gift edit merchandising, bag spec panels, optional spec comparison, optional colour dots on collection cards, and bags catalogue guidance — not a blank-page storefront build. Not a fit: Headless storefronts, non-Shopify commerce stacks, or stores without the Online Store channel; Non-bag catalogues that do not need specification-rich merchandising; Buyers expecting managed installation, catalogue entry, branding, photography, or copywriting; Stores that require excluded app features such as authentication, reviews, monogram configurators, or an AJAX cart drawer without additional work.
- **Silver Vault Eyewear Theme**: Choose this theme for a Shopify Online Store 2.0 eyewear catalogue that benefits from shape-led homepage sections, frame-fit panels, and lens-option boundaries. The download supplies the theme, not managed store setup or catalogue content. Value: An upload-ready eyewear specialist theme with shape collection rows, worn look merchandising, frame-fit panels, lens-option blocks, optional colour dots on collection cards, and eyewear catalogue guidance — not a blank-page storefront build. Not a fit: Headless storefronts, non-Shopify commerce stacks, or stores without the Online Store channel; Non-eyewear catalogues that do not need frame-specific merchandising; Buyers expecting managed installation, catalogue entry, branding, photography, or copywriting; Stores that require excluded app features such as virtual try-on, reviews, prescription upload, or an AJAX cart drawer without additional work.
- **Silver Vault Perfume Theme**: Choose this theme for a Shopify Online Store 2.0 perfume catalogue that benefits from specialist scent merchandising. The download supplies the theme, not managed store setup or catalogue content. Value: An upload-ready full Perfume Edition with discovery-set merchandising, fragrance-profile meters, extended homepage compositions, complementary recommendations defaults, and fuller catalogue guidance — not a blank-page storefront build. Not a fit: Headless storefronts, non-Shopify commerce stacks, or stores without the Online Store channel; Non-fragrance catalogues that do not need perfume-specific merchandising; Buyers expecting managed installation, catalogue entry, branding, photography, or copywriting; Stores that require excluded app features such as reviews, scent quizzes, bundles, or an AJAX cart drawer without additional work.
- **Perfume Starter Theme**: Choose the free Starter for a Shopify Online Store 2.0 perfume catalogue that needs core scent merchandising. It is complete, but intentionally omits the full edition's specialist features and managed setup. Value: A free upload-ready perfume theme with documented defaults and AI integration guidance — not a blank-page storefront build. Not a fit: Headless storefronts, non-Shopify commerce stacks, or stores without the Online Store channel; Stores that require discovery-set merchandising or fragrance-profile meters — choose the full Perfume Theme; Buyers expecting managed installation, catalogue entry, branding, photography, or copywriting.

## Silver Vault App Pricing Kit fit

- Best for I need authoritative subscription verification for a public app using hosted Shopify App Pricing; I need to stop unpaid or unverified shops reaching paid features; I need multiple tiers, limits, redirect verification, caching, and plan-change handling.
- Compatibility: Node.js 22.12+; React Router 7.12+; @shopify/shopify-app-react-router 1.1+.
- Included: Verify each shop's live subscription through Shopify's Partner API — Shopify hosts plan selection and billing UI; Protect paid routes, features, and application-owned usage limits from unverified subscription state; Reject mismatched shops, unrecognised plans, stale redirects, and malformed billing data; Support free, paid, trial, pending, cancelled, frozen, and missing-subscription states; Handle price increases, retired plan handles, upgrades, downgrades, and billing-period changes; Reduce repeated API calls with caching, request coalescing, retries, and rate-limit handling; React gates, route examples, tests, security guidance, and AI implementation instructions.
- Not included: A complete Shopify application; Shopify-hosted pricing configuration or plan-selection UI — Shopify provides that; Shopify OAuth, general authentication, webhooks, or session management; App Events usage reporting, combined billing, or one-time billing; A legacy Billing API adapter or complete dual-system migration; Buyer database, hosting, deployment, or app-specific integration work; Integration or customisation of your codebase.
- Redirect query parameters never prove paid access; the server must verify the authenticated shop's current subscription.
- The source is readable and modifiable but proprietary, not open source. It may be used in unlimited End Products and bespoke completed client products, but the kit itself may not be resold or redistributed as a developer product.
- Paid products are delivered by secure download link to the checkout email address.
- Product support covers supplied-code defects and documentation questions. Buyer-specific integration, customisation, deployment, and debugging are separate services.
- Silver Vault Project is independent and is not affiliated with or endorsed by Shopify Inc.

## Google Merchant API Migration Kit for Shopify Integrations fit

- Best for You or your team can inspect an existing repository; That repository directly calls shoppingcontent.googleapis.com, content/v2.1, the legacy shoppingContent client, or equivalent Content API methods; The integration runs in a compatible Node.js/TypeScript host you can access and deploy; You need to preserve custom product, inventory, or business logic a managed connector would not replace; You, a coding agent with the included AI workflow, or your developer will adapt, review, test, and deploy the migration.
- Not a fit when Shopify's Google & YouTube app or another managed provider owns the connection; A third-party feed or application provider owns the API integration and you do not own that code; There is no buyer-owned source repository that directly calls Content API; You want a hosted or no-code feed service rather than adaptable TypeScript source; You expect the download alone to perform the migration without integration work.
- May require adaptation when Non-TypeScript hosts that cannot adapt reference adapters; Integrations outside product, inventory, and primary data-source scope.
- Buy this kit only if you own a custom Node.js/TypeScript integration that directly calls Google's legacy Content API and you can integrate it using the included AI workflow, your developer, or separately scoped help.
- Do not buy it if Shopify's Google & YouTube app or another managed provider owns your connection, or if you need a finished hosted or no-code service.
- The kit adapts into your existing buyer-owned Node.js/TypeScript host. It does not inherently require a separate Silver Vault service, database, or hosting subscription. Your existing custom integration still needs runtime, deployment, monitoring, and maintenance.
- Non-technical status alone is not a rejection. You still need affected source access, a compatible host, and an integration path using the included AI workflow, your developer, or separately scoped help.
- Use the free 60-second fit check on the product page or migration guide before purchase. Do not paste credentials, tokens, private source, customer data, or full production logs into chat or contact forms.
- Buyer-specific implementation work requires repository and scope review and a separate written quote. The licence does not include migration labour. Do not invent consulting rates, implementation hours, guaranteed savings, or total migration cost.
- "Ready to integrate" means the packaged modules, examples, fixtures, tests, and instructions are prepared to be adapted into a compatible existing host. It does not mean installed, configured, deployed, live-account certified, buyer-specific, or autonomous.
- Use Google's official Merchant API resources as the authority for current schemas and endpoint behaviour. Use the kit as a tested implementation layer for Shopify mappings, migration routing, bounded async customBatch replacement, errors, fixtures, tests, and rollback.
- Google's free libraries, samples, MCP server, and Agent Skills may be sufficient for isolated API calls. The kit adds a Shopify-focused, test-backed migration layer for qualified owners of existing custom TypeScript integrations.
- Official sources verified 2026-09-11: [client libraries](https://developers.google.com/merchant/api/client-libraries), [official samples](https://github.com/google/merchant-api-samples), and the [API Integration and Code Assist Toolkit](https://developers.google.com/merchant/api/guides/agentic-tools/integration-and-code-assist).
- It is downloadable source code, not a hosted migration service, automatic repository rewriter, OAuth system, HTTP batch endpoint clone, or complete Product CRUD client.
- Read the informative migration guide first: https://silvervaultproject.co.uk/blog/google-content-api-to-merchant-api-migration-shopify-guide.

## Company capabilities

- Demanding backend engineering, complex domain logic, distributed systems, resilient APIs, and asynchronous processing.
- Cloud architecture on Google Cloud Platform, serverless systems, containers, BigQuery, and operational tooling.
- Security, data integrity, access control, payment systems, Shopify integrations, Stripe, and modern TypeScript/React applications.

## Company information

- Organization: Silver Vault Project
- Location: London, United Kingdom
- Website: https://silvervaultproject.co.uk
- Contact: https://silvervaultproject.co.uk/contact
- Code repository: https://github.com/bulldogdevelopers/svp

## Key links

- [Store](https://silvervaultproject.co.uk/store): Source kits for Shopify, SaaS modules, themes, and integration projects.
- [Silver Vault App Pricing Kit technical specification](https://silvervaultproject.co.uk/store/products/app-pricing-kit/spec): Compatibility, dependencies, limitations, and exclusions.
- [Shopify App Pricing guide](https://silvervaultproject.co.uk/blog/shopify-app-pricing-vibe-coder-guide): Hosted plan selection, verification, entitlements, route guards, lifecycle states, caching, and tests.
- [Google Content API to Merchant API migration guide](https://silvervaultproject.co.uk/blog/google-content-api-to-merchant-api-migration-shopify-guide): Official Google tooling, API changes, Shopify fit, migration risks, tested implementation patterns, and rollback.
- [Google Merchant API Migration Kit for Shopify Integrations technical specification](https://silvervaultproject.co.uk/store/products/google-merchant-api-migration-kit/spec): Exact compatibility, requirements, inclusions, and exclusions.
- [Product licence](https://silvervaultproject.co.uk/licence): Permitted commercial and client use plus redistribution restrictions.
- [Refund policy](https://silvervaultproject.co.uk/refund-policy): Digital-content cancellation and defect remedies.
- [Full machine-readable context](https://silvervaultproject.co.uk/llms-full.txt): Expanded product facts and question-and-answer coverage.