Atlarium Habitat Database MCP

At A Glance

https://atlarium.bio/mcp is documentation. The canonical Streamable HTTP MCP endpoint is https://mcp.atlarium.bio/mcp.

What You Can Build

All outputs are advisory. Compatibility checks, diagnostics, fertilization plans, equipment estimates, aquarium calculators and tank suggestions should be verified against real livestock, equipment, water chemistry, local regulations and husbandry constraints.

Quickstart

Use any MCP client that supports remote Streamable HTTP servers:

{
  "mcpServers": {
    "atlarium": {
      "type": "streamable-http",
      "url": "https://mcp.atlarium.bio/mcp"
    }
  }
}

Claude Code remote HTTP example:

claude mcp add --transport http atlarium https://mcp.atlarium.bio/mcp

Smoke check the live endpoint:

curl --fail --silent --show-error https://mcp.atlarium.bio/health
curl --fail --silent --show-error https://mcp.atlarium.bio/.well-known/mcp/server-card.json
pnpm mcp:monitor:public

Client Setup

These are compatibility notes, not vendor endorsements. Do not make vendor or directory support claims for ChatGPT, Claude, Cursor, Windsurf, VS Code, Antigravity or any directory unless that vendor has accepted the listing.

ChatGPT App And Widget

The server advertises a read-only MCP Apps / ChatGPT Apps widget resource for Apps-compatible hosts:

The widget renders public habitat results, profiles, diagnostic summaries, product results, calculator output, compatibility summaries, fertilization plans and habitat suggestions. It does not add write access and does not expose workspace, auth, admin, journal, schedule or measurement data.

Widget-only development screenshots and a short demo recording are checked in under docs/assets/chatgpt-screenshots/ and docs/assets/chatgpt-app-demo.mp4. Real host-level web and responsive 390x844 captures are stored under docs/assets/chatgpt-screenshots/real-host/; native iOS/Android recording is still required for the final review package. The v4 / 2.0.3 candidate is live at the MCP endpoint but is not yet approved as the new ChatGPT App version; do not describe that app submission as approved until OpenAI accepts it. The existing dashboard app version 1.0.0 is approved.

Tool Surface

Every tool is registered with read-only annotations: readOnlyHint: true, openWorldHint: false, destructiveHint: false, idempotentHint: true.

Guided Prompts

The server advertises guided prompts for species search, compatibility, habitat planning, algae, diseases, plant problems, product selection, fertilization and tank calculations. Prompts guide clients toward the same public read-only tool surface; they do not add new capabilities or write access.

Tool Call Examples

Each example shows the MCP tool name and a minimal valid JSON input. Generic MCP clients receive plain JSON text; Apps-compatible hosts can also use structuredContent.

search_fish

Purpose: search fish and aquatic animal profiles.

Prompt: "Find beginner-friendly small fish for a 90 L planted tank."

{
  "query": "tetra",
  "language": "en",
  "min_tank_liters": 40,
  "max_tank_liters": 120,
  "limit": 5
}

Output: matching public animal profiles with slugs, localized names, summary fields and public URLs when available.

get_fish_profile

Purpose: retrieve one structured fish or aquatic animal profile.

Prompt: "Show me the Atlarium profile for Neon Tetra."

{
  "slug": "paracheirodon-innesi",
  "language": "en"
}

Output: public profile data, care parameters, taxonomy, relationships and localized content where available.

search_plants

Purpose: search aquatic plant profiles.

Prompt: "Find easy foreground or midground plants for low-tech tanks."

{
  "query": "anubias",
  "language": "en",
  "difficulty": "easy",
  "limit": 5
}

Output: matching public plant profiles with placement, difficulty and public URLs when available.

get_plant_profile

Purpose: retrieve one structured aquatic plant profile.

Prompt: "Open the plant profile for Anubias barteri."

{
  "slug": "anubias-barteri",
  "language": "en"
}

Output: plant requirements, growth information, structured attributes and localized content where available.

search_products

Purpose: search public habitat products.

Prompt: "Find filter products for freshwater tanks."

{
  "query": "filter",
  "language": "en",
  "category": "filter",
  "limit": 5
}

Output: product results with brand/category information and public product URLs when available.

get_product_profile

Purpose: retrieve a public product profile.

Prompt: "Show the product profile for this catalog slug."

{
  "slug": "seachem/prime",
  "language": "en"
}

Output: structured public product data, use cases, brand details and links when available.

search_guides

Purpose: search Atlarium guides and educational content.

Prompt: "Find public guides about cycling an aquarium."

{
  "query": "cycling",
  "language": "en",
  "topic": "aquarium",
  "limit": 5
}

Output: guide matches with title, summary, topic and public URLs when available.

get_guide

Purpose: retrieve one public Atlarium guide.

Prompt: "Open the nitrogen cycle guide."

{
  "slug": "aquarium/nitrogen-cycle",
  "language": "en"
}

Output: structured public guide content and related metadata.

search_algae

Purpose: search algae diagnostic profiles.

Prompt: "Find algae profiles for green dust on aquarium glass."

{
  "query": "green dust",
  "language": "en",
  "difficulty": 2,
  "limit": 5
}

Output: algae matches with symptoms, likely causes and advisory guidance.

get_algae_profile

Purpose: retrieve one algae profile.

Prompt: "Show the profile for green spot algae."

{
  "slug": "green-spot-algae",
  "language": "en"
}

Output: structured public algae profile with symptoms, causes, prevention and advisory response.

search_diseases

Purpose: search aquatic disease profiles.

Prompt: "Find disease profiles for white spots on fish."

{
  "query": "white spots",
  "language": "en",
  "water_type": "freshwater",
  "limit": 5
}

Output: possible disease profiles and advisory treatment references.

get_disease_profile

Purpose: retrieve one disease profile.

Prompt: "Open the ich disease profile."

{
  "slug": "ich",
  "language": "en"
}

Output: symptoms, possible causes, treatment references and disclaimers.

search_plant_problems

Purpose: search aquatic plant deficiency, pest and environment profiles.

Prompt: "Find causes for yellowing leaves in aquarium plants."

{
  "query": "yellow leaves",
  "language": "en",
  "type": "deficiency",
  "limit": 5
}

Output: plant problem matches with symptoms, causes and advisory corrections.

get_plant_problem_profile

Purpose: retrieve one plant problem profile.

Prompt: "Open the nitrogen deficiency profile."

{
  "slug": "nitrogen-deficiency",
  "language": "en"
}

Output: structured deficiency/problem data and advisory guidance.

search_medicines

Purpose: search aquarium medicine and treatment product profiles.

Prompt: "Find public medicine references for ich treatment."

{
  "query": "ich",
  "language": "en",
  "limit": 5
}

Output: medicine/treatment references with public profile data where available.

get_medicine_profile

Purpose: retrieve one medicine profile.

Prompt: "Open the profile for a medicine slug."

{
  "slug": "malachite-green",
  "language": "en"
}

Output: structured public medicine reference, use notes and disclaimers.

match_diagnostic_profiles

Purpose: match symptom text across algae, disease, plant problem and medicine profiles.

Prompt: "Match fuzzy white growth on driftwood and stressed fish symptoms."

{
  "query": "white fuzzy growth and fish flashing",
  "language": "en",
  "limit": 8
}

Output: likely public diagnostic profiles grouped by relevance.

list_product_categories

Purpose: list product categories for equipment and fertilizers.

Prompt: "Which public equipment categories are available?"

{
  "language": "en",
  "type": "equipment"
}

Output: localized public category names and identifiers.

list_product_brands

Purpose: list public product brands.

Prompt: "List brands matching Seachem."

{
  "language": "en",
  "query": "Seachem"
}

Output: matching public brand names and metadata.

search_equipment

Purpose: search aquarium and habitat equipment products.

Prompt: "Find heaters for a freshwater setup."

{
  "query": "heater",
  "language": "en",
  "use_case": "freshwater",
  "limit": 5
}

Output: equipment product matches with structured public catalog fields.

get_equipment_profile

Purpose: retrieve one equipment product profile.

Prompt: "Open this equipment profile."

{
  "slug": "eheim/thermocontrol",
  "language": "en"
}

Output: public equipment details, category, brand and usage fields when available.

search_fertilizers

Purpose: search fertilizer products and nutrient profiles.

Prompt: "Find liquid fertilizers for planted aquariums."

{
  "query": "flourish",
  "language": "en",
  "category": "fertilizer",
  "limit": 5
}

Output: fertilizer product matches and nutrient metadata when available.

get_fertilizer_profile

Purpose: retrieve one fertilizer profile.

Prompt: "Open this fertilizer profile."

{
  "slug": "seachem/flourish",
  "language": "en"
}

Output: structured fertilizer data, dosing metadata and public catalog details when available.

check_species_compatibility

Purpose: check basic compatibility among habitat species.

Prompt: "Can Neon Tetra and Corydoras paleatus work in a 90 L planted tank?"

{
  "species": ["Paracheirodon innesi", "Corydoras paleatus"],
  "language": "en",
  "tank_liters": 90,
  "ph": 6.8,
  "temperature": 24
}

Output: advisory compatibility signals, warnings, rationale and constraints.

get_water_parameters

Purpose: retrieve recommended water parameters for a fish or plant.

Prompt: "What water parameters does Neon Tetra prefer?"

{
  "slug": "paracheirodon-innesi",
  "type": "fish",
  "language": "en"
}

Output: public temperature, pH, GH/KH and related parameter guidance where available.

suggest_species_for_tank

Purpose: suggest aquatic species based on tank and water parameters.

Prompt: "Suggest beginner-friendly species for a 120 L planted tank."

{
  "tank_liters": 120,
  "language": "en",
  "ph": 6.8,
  "temperature": 24,
  "beginner_friendly": true,
  "planted_tank": true,
  "limit": 8
}

Output: public species suggestions with warnings and basic rationale.

suggest_habitat_for_tank

Purpose: suggest a complete public habitat plan.

Prompt: "Plan a balanced planted community habitat for 120 L."

{
  "tank_liters": 120,
  "language": "en",
  "ph": 6.8,
  "temperature": 24,
  "beginner_friendly": true,
  "planted_tank": true,
  "co2": "low",
  "light_level": "medium",
  "setup_intent": "community",
  "target_difficulty": "balanced",
  "water_type": "FRESHWATER",
  "limit": 8
}

Output: fish, invertebrates, plants, products, warnings, motivations, related guides and advisory disclaimer.

search_fertilization_regimes

Purpose: search fertilization regimes and dosing philosophies.

Prompt: "Find regimes for low-tech planted tanks."

{
  "query": "low tech",
  "language": "en",
  "topic": "planted",
  "limit": 5
}

Output: public regime matches with summary, topics and public URLs when available.

get_fertilization_regime

Purpose: retrieve one fertilization regime.

Prompt: "Open the Estimative Index regime profile."

{
  "slug": "estimative-index",
  "language": "en"
}

Output: structured public dosing philosophy/regime details.

calculate_fertilizer_dose

Purpose: calculate an advisory fertilizer dose for a catalog product and tank volume.

Prompt: "Calculate the dose of Seachem Flourish for 120 L."

{
  "brand_name": "Seachem",
  "product_name": "Flourish",
  "volume_liters": 120
}

Output: advisory dose estimate and product-related dosing context.

calculate_nutrient_gaps

Purpose: compare nutrient measurements against targets.

Prompt: "Compare my nitrate and potassium readings with planted tank targets."

{
  "language": "en",
  "volume_liters": 120,
  "measurements": [
    {
      "kind": "nitrogen_mg_l",
      "value": 5
    },
    {
      "kind": "potassium_mg_l",
      "value": 8
    }
  ],
  "targets": {
    "nitrogen_mg_l": 10,
    "potassium_mg_l": 15
  }
}

Output: nutrient gap estimates without saving measurements.

calculate_weekly_dose_totals

Purpose: calculate weekly totals for a non-persistent dosing plan.

Prompt: "Add up my weekly liquid fertilizer plan."

{
  "language": "en",
  "volume_liters": 120,
  "items": [
    {
      "brand_name": "Seachem",
      "product_name": "Flourish",
      "method": "LIQUID",
      "dose_value": 5,
      "dose_unit": "ml",
      "days_of_week": [1, 3, 5]
    }
  ]
}

Output: weekly product totals and schedule summary.

generate_fertilization_plan

Purpose: generate an advisory non-persistent fertilization plan.

Prompt: "Generate a balanced planted tank fertilization plan for 120 L."

{
  "language": "en",
  "volume_liters": 120,
  "regime": "balanced",
  "targets": {
    "nitrogen_mg_l": 10,
    "phosphorus_mg_l": 1,
    "potassium_mg_l": 15,
    "iron_mg_l": 0.1
  }
}

Output: advisory plan, nutrient targets, product suggestions and disclaimer.

calculate_tank_volume

Purpose: calculate gross and net aquarium volume estimates.

Prompt: "Calculate net volume for a 60 x 30 x 36 cm tank."

{
  "shape": "rect",
  "length_cm": 60,
  "width_cm": 30,
  "height_cm": 36,
  "substrate_depth_cm": 5,
  "hardscape_displacement_liters": 4
}

Output: gross and net volume estimates.

calculate_tank_weight

Purpose: estimate aquarium weight from dimensions and material inputs.

Prompt: "Estimate the filled weight of a 120 L aquarium."

{
  "shape": "rect",
  "length_cm": 80,
  "width_cm": 35,
  "height_cm": 45,
  "glass_thickness_mm": 8,
  "substrate_depth_cm": 6,
  "hardscape_weight_kg": 12,
  "equipment_weight_kg": 5
}

Output: advisory total weight estimate and component breakdown.

calculate_water_change

Purpose: calculate water change volume, weekly totals and dilution estimates.

Prompt: "How much water is a 30 percent change on 120 L twice per week?"

{
  "volume_liters": 120,
  "change_percent": 30,
  "changes_per_week": 2
}

Output: per-change volume and weekly total estimates.

calculate_water_chemistry

Purpose: calculate hardness conversions, CO2, salinity and water mixing.

Prompt: "Estimate CO2 from pH 6.8 and KH 4."

{
  "co2": {
    "ph": 6.8,
    "kh_dkh": 4
  },
  "general_hardness": {
    "unit": "dgh",
    "value": 8
  }
}

Output: public chemistry conversions and advisory estimates.

convert_units

Purpose: convert aquarium-relevant units.

Prompt: "Convert 120 liters and 24 C."

{
  "volume": {
    "unit": "l",
    "value": 120
  },
  "temperature": {
    "unit": "c",
    "value": 24
  }
}

Output: converted values for supported units.

calculate_equipment_requirements

Purpose: calculate advisory heater, lighting and electricity requirements.

Prompt: "Estimate heater and lighting needs for a 120 L aquarium."

{
  "heater": {
    "volume_liters": 120,
    "ambient_c": 20,
    "target_c": 25,
    "insulation": "normal"
  },
  "lighting": {
    "volume_liters": 120,
    "lumens": 3600
  },
  "electricity": {
    "wattage": 100,
    "hours_per_day": 8,
    "cost_per_kwh": 0.25
  }
}

Output: advisory equipment estimates and electricity usage/cost summary.

Discovery And Directory Status

Publication tracking and reusable submission copy live in config/distribution-registry.json, docs/publication-checklist.md, docs/directory-submission-payloads.md and docs/mcp-submission-cockpit.md. Pending, blocked and rejected targets remain in the operational registry and are not presented as accepted public listings.

Local Development

pnpm install
cp .env.example .env
pnpm dev

By default the server listens on http://localhost:43118.

Local development against the Atlarium app:

ATLARIUM_API_BASE_URL=http://localhost:43117/api/public/mcp/v1 pnpm dev

Configuration

• MCP_PUBLIC_BASE_URL: public base URL, production default https://mcp.atlarium.bio.
• ATLARIUM_API_BASE_URL: public read-only Atlarium API base URL.
• MCP_ALLOWED_HOSTS: comma-separated host allowlist used for DNS rebinding protection.
• MCP_TRUST_PROXY: Express proxy trust setting; default 1 assumes one trusted reverse proxy in production.
• ATLARIUM_API_TIMEOUT_MS: upstream public API timeout in milliseconds (default 15000).
• MCP_PUBLIC_PROBE_ATTEMPTS: attempts for read-only public monitors (default 3).
• MCP_PUBLIC_PROBE_RETRY_DELAY_MS: initial retry delay for public monitors, doubled after each failure (default 1000).
• ATLARIUM_API_RESPONSE_MAX_BYTES: maximum upstream JSON response size.
• OPENAI_APPS_CHALLENGE_TOKEN: public OpenAI Apps domain verification token served from /.well-known/openai-apps-challenge.

Production deployments must run behind a TLS-terminating reverse proxy or Ingress that overwrites X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Proto before traffic reaches this server.

Quality Gate

pnpm lint
pnpm typecheck
pnpm test
pnpm build
pnpm audit:prod
docker build -t atlarium-mcp:local .

With a local server running:

pnpm mcp:conformance

With production DNS and TLS live:

pnpm mcp:monitor:public
pnpm directories:submit -- --check
pnpm mcp:validate:public
pnpm mcp:conformance:public

Contributing

See CONTRIBUTING.md. Public tool changes must update the server implementation, tests, server-card metadata, server.json, README.md, docs/mcp.md, docs, examples and directory publication notes in the same release.

Security

See SECURITY.md. Do not report sensitive security issues in public GitHub issues.

License

MIT. See LICENSE.