How to Use the EPA Computational Toxicology MCP in Claude

Q: How do I install the EPA Computational Toxicology server in Claude Desktop?

Open your claudedesktopconfig.json file and add the server configuration under the MCP configuration key. Provide the command and arguments for the stdio connection, save the file, and restart the desktop app. You will see a new hammer icon in your chat input indicating the tools are ready.

Get EPA chemical toxicity and exposure data directly inside Claude Desktop to evaluate safety profiles in seconds.

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Connect EPA Computational Toxicology MCP to Claude Desktop

Create your Vinkius account to connect EPA Computational Toxicology to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup EPA Computational Toxicology with Claude Desktop

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Speed up safety screening with the EPA Computational Toxicology MCP Server

The `search_chemical_by_name` tool connects your agent to the EPA CompTox database to pull live chemical identifiers on demand. You run `search_chemical_by_casrn` to grab the exact substance you need without leaving your chat window. Claude Desktop handles the lookup instantly, bypassing the manual search portals that slow down your research. Once you have the chemical ID, you query hazard profiles using `get_hazard_summary` to see established toxicity values immediately. The agent maps regulatory lists using `get_chemical_lists` to flag restricted substances. You get raw, unvarnished EPA data inside your chat, letting you make quick go/no-go decisions on new molecular structures.

Predict environmental fate and exposure risks

Environmental transport analysis starts with `get_fate_and_transport` to fetch half-life values and bioconcentration factors directly into your workspace. Your agent analyzes how a substance behaves in soil, water, and air using actual EPA models. You don't have to copy-paste constants from PDFs or hunt down obscure research papers. Combine that environmental data with `get_exposure_summary` to evaluate predicted exposure levels and product use data. Claude Desktop parses the ExpoCast and CPDat databases to show you where these chemicals end up. You see the real-world footprint of a compound before you commit to a synthesis path.

Map physical properties to biological activity

The `get_physicochemical_properties` tool pulls experimental and predicted constants like melting point, solubility, and logP directly into your prompt context. Your agent uses these values to identify potential absorption and persistence issues early in the design phase. You catch formulation bottlenecks before ordering raw materials. Pair those physical constants with biological assay data using `get_bioactivity_summary` to check high-throughput screening results from ToxCast. You immediately see which cellular pathways a compound triggers. It gives you a clear picture of biological reactivity without waiting weeks for in vitro lab results.

Setup guide

Set up EPA Computational Toxicology MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The EPA Computational Toxicology MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the EPA Computational Toxicology MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under epa-computational-toxicology-mcp.

json

{
  "mcpServers": {
    "epa-computational-toxicology-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by US EPA CompTox. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about EPA Computational Toxicology MCP in Claude Desktop

Open your `claude_desktop_config.json` file and add the server configuration under the MCP configuration key. Provide the command and arguments for the stdio connection, save the file, and restart the desktop app. You will see a new hammer icon in your chat input indicating the tools are ready.

Yes, the desktop application runs this connection locally as a subprocess on your machine. Your local Claude Desktop agent executes tools like `get_chemical_details` directly by communicating through the MCP standard. This setup keeps your active queries fast and responsive.

Simply ask your agent to find the chemical and provide the CAS number. Claude Desktop automatically triggers `search_chemical_by_casrn` to find the exact DTXSID and match. From there, you can query its synonyms or hazard values in the same conversation.

No. Vinkius manages the connection to the public EPA CompTox endpoints for you. You only need your single Vinkius endpoint token to authorize your agent to run any of the ten available tools.

Your queries containing CASRNs, chemical names, or DTXSIDs pass through an ephemeral, zero-trust V8 isolate sandbox. Vinkius does not store the chemical structures or toxicity profiles you look up. The connection is fully isolated, ensuring your proprietary research targets remain confidential.

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