One address for any MCP client. No sign-in needed on this server.
What it does
14 read14 act4 other
Grouped by tool name. At most: moves money, runs code or commands, deletes data, or sends messages for you.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Tools
32 · grouped by tool name · checked 10 Oct 2026Read · 14Look things up
- get_catalog_templates
- list_consents
- verify_inquiry
- get_my_access
- verify_device_login
- verify_account_registration
- verify_registration
- get_onboarding_route
- get_my_operation
- get_legal_entity_types
- get_billing
- list_invitations
- list_members
- list_tenant_services
Act · 14Change something
- start_inquiry
- accept_invitation
- create_access_request
- approve_access_request
- withdraw_access_request
- start_device_login
- start_account_registration
- start_registration
- create_self_service_tenant
- create_invitation
- revoke_invitation
- grant_assignment
- revoke_assignment
- add_tenant_service
Other · 4Neither hinted nor named
- record_consent
- dismiss_access_request
- enrich_domain
- complete_billing
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.
| Endpoint | https://mcp.4chems.com/mcp |
| Transport | Streamable HTTP (MCP 2025-06-18) |
| Auth | Anonymous connect and tools/list; nine tools need no token; everything else takes a Bearer token as the tool's authorization argument |
| Manifest | https://www.4chems.com/.well-known/mcp.json |
| Docs | https://www.4chems.com/mcp/ (DE: https://www.4chems.com/de/mcp/) |
| Registry | com.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
| Tool | Purpose |
|---|---|
start_inquiry, verify_inquiry | Send 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_templates | List the hosted applications and trial templates. |
get_onboarding_route | Return the next onboarding step for the caller. |
get_legal_entity_types | Legal-entity types for a country. |
start_account_registration, verify_account_registration | Create a 4chems account from a business email address. |
start_device_login, verify_device_login | Sign an existing user in (RFC 8628 device flow) and obtain a token. |
Bearer token required (authorization: "Bearer <token>")
| Area | Tools |
|---|---|
| Access requests | get_my_access, create_access_request, approve_access_request, dismiss_access_request, withdraw_access_request |
| Tenant setup | create_self_service_tenant, enrich_domain, get_my_operation |
| Billing | get_billing, complete_billing |
| Invitations | list_invitations, create_invitation, revoke_invitation, accept_invitation |
| Consents | list_consents, record_consent |
| Members & services | list_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
authorizationargument, 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.
