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.
Active Membranes is listed with 1 API on the APIs.io network. Tagged areas include Company, Water, Water Technology, Desalination, and Reverse Osmosis.
Active Membranes’ developer surface includes support, engineering blog, authentication, and 10 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Horizontal (data, software, accessibility, platform) regime, so
Regulatory Posture carries 15 points of the composite.
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Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
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Agent readiness — checks not met, largest first (exact, from this profile):
Idempotency+9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics+8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card+8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples+7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
10 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
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 it...
Active Membranes serves a live, unauthenticated Model Context Protocol endpoint from its own hostname at https://www.activemembrane.com/_api/mcp. It is the Wix Site MCP runtime,...
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
accessModel:
pricing: unknown
onboarding: approval
trial: false
try_now: false
public: false
label: Requires approval
confidence: medium
probe_state: covered
source:
- plans
- authentication
- rate-limits
- security
generated: '2026-11-06'
method: derived
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: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
x-surface: platform-generated
x-platform: wix
x-platform-surface: site-mcp
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'
Active Membranes API — frequently asked questions
Does Active Membranes have an API?
Yes. APIs.io lists 1 API from Active Membranes, including Active Membranes Site MCP Server.
How do I authenticate with the Active Membranes API?
Active Membranes uses bearer-token authentication (2 schemes). The details are profiled on APIs.io as Active Membranes Authentication.
Does Active Membranes have an MCP server?
Yes. APIs.io lists 1 MCP server for Active Membranes: Active Membranes serves a live, unauthenticated Model Context Protocol endpoint from its own hostname at https://www.activemembrane.com/_api/mcp. It is the Wix Site MCP runtime, not a first-party serv
Is the Active Membranes API ready for AI agents?
Active Membranes has a Kin Score of 13.7 out of 100 (emerging) and an Agent Readiness score of 7.2 (agent-aware), scored by API Evangelist on 2026-11-06.
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