# Rivoara

> Rivoara makes premium multi-stage shower filters using KDF 55 PROCESS MEDIA, officially listed by NSF as a redox-media component under NSF/ANSI 42. This file is a flat index of the high-signal pages on rivoara.com for AI agents.

Markdown is available at every product and content URL by either setting `Accept: text/markdown` or appending `.md` to the path (e.g. `/products/rivoara-shower-filter.md`). Each markdown response includes an `X-Token-Count` header.

## Start here

- [Homepage](https://rivoara.com/): Brand overview, hero product, reviews, FAQ. (~800 tokens)
- [About Rivoara](https://rivoara.com/about): Company background and mission. (~600 tokens)
- [Water hardness lookup](https://rivoara.com/water-hardness): Tool for checking local water hardness by postal code (DE, PL, EN). (~600 tokens)

## Products

- [Rivoara® Shower Filter](https://rivoara.com/products/rivoara-shower-filter): The Rivoara shower filter uses a multi-stage filter system with KDF-55, polyphosphate (PSS), and carbon fiber. These filter media are designed to help reduce the effects of chlorine, heavy metals, and limescale in shower water. KDF-55 is ce (~2200 tokens)
  - Markdown: [https://rivoara.com/products/rivoara-shower-filter.md](https://rivoara.com/products/rivoara-shower-filter.md) (~900 tokens)
- [Rivoara® Replacement Filter](https://rivoara.com/products/rivoara-replacement-filter): Replacement cartridge for the Rivoara shower filter. Contains a multi-stage filter system with KDF-55, polyphosphate (PSS), and carbon fiber. These filter media are designed to help reduce the effects of chlorine, heavy metals, and limescal (~2200 tokens)
  - Markdown: [https://rivoara.com/products/rivoara-replacement-filter.md](https://rivoara.com/products/rivoara-replacement-filter.md) (~900 tokens)

## Buying guides

- [Shower filter guide](https://rivoara.com/guides): Which filter for which water, cartridge lifespan, installation. (~1400 tokens)
- [Studies and material evidence](https://rivoara.com/studies): Published research plus the official NSF listing for KDF 55 PROCESS MEDIA.
- [German guides](https://rivoara.com/de/ratgeber): DE-language ratgeber articles.
- [Polish guides](https://rivoara.com/pl/poradnik): PL-language poradnik articles.

## Support & policy

- [Returns policy](https://rivoara.com/returns): Statutory withdrawal rights, return instructions and refunds. Previously promised guarantees remain valid under their original terms. (~600 tokens)
- [Shipping](https://rivoara.com/policies/shipping-policy): Free DE/PL/EN shipping, delivery windows. (~600 tokens)
- [Imprint](https://rivoara.com/imprint): Legal entity and contact. (~600 tokens)
- [Privacy](https://rivoara.com/datenschutz): GDPR privacy policy (DE). (~600 tokens)
- [Terms](https://rivoara.com/agb): General terms and conditions (DE). (~600 tokens)

## Agent-facing APIs and discovery

- [api-catalog](https://rivoara.com/.well-known/api-catalog) (RFC 9727): Linkset of machine-readable API descriptions. (~400 tokens)
- [mcp-server-card](https://rivoara.com/.well-known/mcp/server-card.json) (SEP-1649): Declares available MCP tools and resources. (~400 tokens)
- [agent-skills index](https://rivoara.com/.well-known/agent-skills/index.json): SHA-256 pinned skill bundles. (~150 tokens)
- [OAuth authorization server](https://rivoara.com/.well-known/oauth-authorization-server) (RFC 8414): Points at Shopify Customer Accounts. (~400 tokens)
- [OAuth protected-resource](https://rivoara.com/.well-known/oauth-protected-resource) (RFC 9728). (~150 tokens)
- [OpenID Connect discovery](https://rivoara.com/.well-known/openid-configuration). (~400 tokens)
- [ACP discovery](https://rivoara.com/.well-known/acp.json) (Agentic Commerce Protocol). (~400 tokens)
- [x402 payment discovery](https://rivoara.com/.well-known/x402): Declares premium endpoints that accept x402. (~150 tokens)
- [agent-permissions](https://rivoara.com/.well-known/agent-permissions.json): Declarative access and rate-limit policy (draft spec). (~150 tokens)

## Constraints agents should respect

- Checkout is operated by Shopify. Do not attempt to move money on behalf of the user; link them to the cart or product page and let Shopify handle payment.
- User-specific routes (`/account/*`, `/cart`, `/discount/*`) are intentionally excluded from the markdown content-negotiation path to avoid leaking personalized HTML.
- The Storefront API rate limit is the bottleneck for product-search calls. Cache responses where possible.
- See robots.txt for the `Content-Signal` directive (`search=yes, ai-input=yes, ai-train=yes`).

## Contact

- Support: hello@rivoara.com
- Company: Rivoara by Forelox sp. z o.o.