aid: active-membranes name: Active Membranes description: >- Active Membranes is a California water-technology company, founded in 2022 out of research at the UCLA Samueli School of Engineering, that builds electrically conductive "electro-active" reverse-osmosis membranes for desalination and water reuse. Where a conventional RO membrane filters passively and is cleaned after it fouls, Active Membranes embeds conductive material in the membrane's polymer matrix and uses a control unit it calls the Active Box to apply a tunable low electrical potential at the membrane surface, electrostatically repelling scale-forming ions and charged organic foulants in real time. The modules ship in the standard 8-inch by 40-inch spiral-wound format so they retrofit into existing pressure vessels, and are aimed at seawater and brackish desalination, produced-water and industrial reuse. The company reports field results including roughly 48% less irreversible fouling in produced-water reuse, up to 70% longer cleaning cycles in brackish water, and a Ventura County study citing about 57% lower cost and 64% less footprint. It has raised roughly $3.24M in seed funding from Natural Ventures, Echo River Capital and Pacifica Water Solutions, won the 2023 Global Water Summit Water Technology Idol award, and was selected as a Qualified Team in the XPRIZE Water Scarcity competition. Active Membranes sells capital equipment, not software: it operates no developer program, publishes no OpenAPI, GraphQL or SDK, and lists no pricing. It does, however, serve two machine-readable surfaces from its own hostname — a substantial hand-written /llms.txt, and a live, unauthenticated Model Context Protocol endpoint at /_api/mcp exposing nine tools over the public site content. Both are Wix platform features the company chose to enable and advertise rather than first-party engineering. url: https://raw.githubusercontent.com/api-evangelist/active-membranes/refs/heads/main/apis.yml image: https://static.wixstatic.com/media/dd52de_d31c0c0159fe4ea68318db941a61b17f~mv2.png/v1/fill/w_192,h_192,lg_1,usm_0.66_1.00_0.01/dd52de_d31c0c0159fe4ea68318db941a61b17f~mv2.png position: Producing x-type: company x-source: harvest:secondary-market x-tier: profiled x-tier-reason: platform-mcp-and-llms-txt-only-no-developer-program specificationVersion: '0.20' created: '2026-09-06' modified: '2026-09-06' tags: - Company - Water - Water Technology - Desalination - Reverse Osmosis - Membranes - Cleantech - Sustainability - Industrial - Hardware - MCP - Agents apis: - aid: active-membranes-site-mcp name: Active Membranes Site MCP Server description: >- A live, unauthenticated Model Context Protocol endpoint served from Active Membranes' own hostname at https://www.activemembrane.com/_api/mcp and advertised by the company in its own llms.txt. An anonymous JSON-RPC tools/list returns HTTP 200 and nine tools with full JSON Schema inputs: GetBusinessDetails, SearchInSite, SearchSiteApiDocs, BrowseWixRESTDocsMenu, ReadFullDocsArticle, ReadFullDocsMethodSchema, GenerateVisitorToken, CallWixSiteAPI and ExecuteWixAPI. This is the Wix Site MCP runtime rather than a server the company wrote — the tools and schemas are Wix's, and GetBusinessDetails reports the Blog app as the only installed business solution, so what an agent can actually reach is the public site and its blog posts. It is recorded because it is real, reachable, first-party-hosted and deliberately advertised. Active Membranes publishes no other API of any kind. humanURL: https://www.activemembrane.com/ baseURL: https://www.activemembrane.com/_api/mcp image: https://static.wixstatic.com/media/dd52de_d31c0c0159fe4ea68318db941a61b17f~mv2.png/v1/fill/w_192,h_192,lg_1,usm_0.66_1.00_0.01/dd52de_d31c0c0159fe4ea68318db941a61b17f~mv2.png tags: - MCP - Agents - Site Content - Water Technology properties: - type: MCPServer url: mcp/active-membranes-mcp.yml - type: Authentication url: authentication/active-membranes-authentication.yml - type: Conventions url: conventions/active-membranes-conventions.yml - type: RateLimits url: rate-limits/active-membranes-rate-limits.yml - type: Plans url: plans/active-membranes-plans-pricing.yml maintainers: - FN: Kin Lane email: kin@apievangelist.com - FN: APIs.json email: info@apis.io common: - type: DomainSecurity url: security/active-membranes-domain-security.yml - type: Website url: https://www.activemembrane.com/ - type: Support url: https://www.activemembrane.com/contact - type: Blog url: https://www.activemembrane.com/reverse-osmosis-insights - type: BlogRSS url: https://www.activemembrane.com/blog-feed.xml - type: LinkedIn url: https://www.linkedin.com/company/active-membranes-inc/ - type: LLMsTxt url: llms/active-membranes-llms.txt - type: MCPServer url: mcp/active-membranes-mcp.yml - type: Authentication url: authentication/active-membranes-authentication.yml - type: Conventions url: conventions/active-membranes-conventions.yml - type: Conformance url: conformance/active-membranes-conformance.yml - type: RateLimits url: rate-limits/active-membranes-rate-limits.yml - type: Plans url: plans/active-membranes-plans-pricing.yml x-enrichment: date: '2026-09-06' status: enriched artifacts_added: 10 pass: local-v3 x-coverage: state: covered detail: >- Active Membranes sells electro-active reverse-osmosis membrane modules, not software, and runs no developer program — but it is not a zero: it serves a hand-written /llms.txt and a live, unauthenticated Wix Site MCP endpoint at /_api/mcp that returns nine tools to an anonymous tools/list. Both were captured. No OpenAPI, GraphQL, AsyncAPI, WSDL, SDK, agent card or /.well-known document exists on either host. evidence: - url: https://www.activemembrane.com/_api/mcp status: 200 - url: https://www.activemembrane.com/llms.txt status: 200 - url: https://www.activemembrane.com/openapi.json status: 400 - url: https://www.activemembrane.com/developers status: 404 checked: '2026-09-06'