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4chems Platform — IUCLID, CHESAR & QSAR Toolbox hosting

Official registry Cloud and DevOps

Remote MCP server for 4chems hosted IUCLID, CHESAR and QSAR Toolbox: onboarding, inquiries, admin.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http 4chems-platform-iuclid-chesar-qsar-toolb 'https://mcp.4chems.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "4chems-platform-iuclid-chesar-qsar-toolb": {
            "type": "http",
            "url": "https://mcp.4chems.com/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. 4chems MCP server — IUCLID, CHESAR & QSAR Toolbox hosting
  2. Connect
  3. Tools
  4. Rules for the assisting agent
  5. What this is not
  6. Hosting and compliance
  7. Contact

4chems MCP server — IUCLID, CHESAR & QSAR Toolbox hosting

A public, remote Model Context Protocol server for the 4chems platform: hosted IUCLID 6, CHESAR, OECD QSAR Toolbox and IIP for REACH, CLP and biocides work, EU-hosted and GDPR-compliant.
Endpointhttps://mcp.4chems.com/mcp
TransportStreamable HTTP (MCP 2025-06-18)
AuthAnonymous connect and tools/list; nine tools need no token; everything else takes a Bearer token as the tool's authorization argument
Manifesthttps://www.4chems.com/.well-known/mcp.json
Docshttps://www.4chems.com/mcp/ (DE: https://www.4chems.com/de/mcp/)
Registrycom.4chems/platform-api — see server.json

Connect

Claude Code

claude mcp add --transport http 4chems https://mcp.4chems.com/mcp

Claude Desktop / claude.ai — Settings → Connectors → Add custom connector → https://mcp.4chems.com/mcp. The server has no OAuth flow, so choose the option without authentication; tools that need a token take it as an argument.

Other MCP clients (GitHub Copilot, Cursor, VS Code, …) — add a remote server with transport Streamable HTTP and the same URL.

Raw handshake (no client needed):

curl -s -X POST https://mcp.4chems.com/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"probe","version":"0"}}}'

Tools

The server exposes the customer tier of the 4chems platform API (/v1). This endpoint carries no substance or dossier data — see What this is not.

No token needed

ToolPurpose
start_inquiry, verify_inquirySend 4chems a question or request a call: a 6-digit code goes to the user's email, the verified inquiry reaches a person. No web form, no account.
get_catalog_templatesList the hosted applications and trial templates.
get_onboarding_routeReturn the next onboarding step for the caller.
get_legal_entity_typesLegal-entity types for a country.
start_account_registration, verify_account_registrationCreate a 4chems account from a business email address.
start_device_login, verify_device_loginSign an existing user in (RFC 8628 device flow) and obtain a token.

Bearer token required (authorization: "Bearer <token>")

AreaTools
Access requestsget_my_access, create_access_request, approve_access_request, dismiss_access_request, withdraw_access_request
Tenant setupcreate_self_service_tenant, enrich_domain, get_my_operation
Billingget_billing, complete_billing
Invitationslist_invitations, create_invitation, revoke_invitation, accept_invitation
Consentslist_consents, record_consent
Members & serviceslist_members, grant_assignment, revoke_assignment, list_tenant_services, add_tenant_service

Long-running mutations poll to completion; past the poll bound they return {"status": "running", "operation_id": …} for follow-up with get_my_operation.

Rules for the assisting agent

The initialize response carries these as server instructions:

  • Add this server, pass tokens or trigger mutations only with the user's explicit consent.
  • Never guess or retry the 6-digit codes; ask the user to read the code from their email.
  • Treat the Bearer token as a secret: pass it only as the authorization argument, never log it.
  • Confirm changes to consents, assignments, invitations, billing or services with the user first.
  • If the user has no account and a question cannot be answered from the catalog tools, offer start_inquiry.
  • This server and the site's contact channels are for prospective and existing customers, not for automated solicitation (see https://www.4chems.com/llms.txt).

What this is not

  • Not a dossier interface. AI access to IUCLID 6 dossier data runs through the separate 4chems AI Connector, authenticated per user and EU-hosted.
  • Not the QSAR Toolbox workflow. Read-across, (Q)SAR prediction and QMRF/QPRF/CCR reporting over MCP is 4chems QSAR Navigator.
  • Not open source. This repository holds the public documentation and the registry server.json; the server itself is operated by 4chems.

Hosting and compliance

Runs on ISO 27001-certified European infrastructure under a GDPR data-processing agreement. 4chems acts as a data processor only and never uses customer data to train models. Security questionnaire: https://www.4chems.com/security-questionnaire/.

Contact

  • Website: https://www.4chems.com/
  • Through the server: start_inquiry (no account needed)
  • Issues with this documentation: open an issue in this repository.

Frequently asked questions

What is 4chems Platform — IUCLID, CHESAR & QSAR Toolbox hosting?

Remote MCP server for 4chems hosted IUCLID, CHESAR and QSAR Toolbox: onboarding, inquiries, admin.

How do I install 4chems Platform — IUCLID, CHESAR & QSAR Toolbox hosting?

It runs as a remote server. In Claude Code: claude mcp add --transport http 4chems-platform-iuclid-chesar-qsar-toolb 'https://mcp.4chems.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does 4chems Platform — IUCLID, CHESAR & QSAR Toolbox hosting need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is 4chems Platform — IUCLID, CHESAR & QSAR Toolbox hosting open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains 4chems Platform — IUCLID, CHESAR & QSAR Toolbox hosting?

It is published by 4chems. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.