Spec Driven Development
by formulahendry
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer★ 440MITUpdated 14 months ago
Install
4chems Platform — IUCLID, CHESAR & QSAR Toolbox hosting
Overview
Description from the maker (original English)
Remote MCP server for 4chems hosted IUCLID, CHESAR and QSAR Toolbox: onboarding, inquiries, admin.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://mcp.4chems.com/mcpRun this in your terminal
claude mcp add --transport http platform-api https://mcp.4chems.com/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"platform-api": {
"url": "https://mcp.4chems.com/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"platform-api": {
"type": "http",
"url": "https://mcp.4chems.com/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://mcp.4chems.com/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified against the domain 4chems.com (the registry checks domain ownership)
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Otheri
- More stars than 0% of the other 32380 servers in this category
- Published to the registry more recently than 59% of the other 32380 servers in this category
- Basic checks equal to or better than 100% of the other 32380 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is 4chems Platform — IUCLID, CHESAR & QSAR Toolbox hosting safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.12.1) reached the registry 27 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Dechonet MCP
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Remote Desktop Commander
by desktop-commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud★ 211Updated yesterday
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Dechonet MCP
by node-man
30 security tools for AI agents: phishing links, exposure maps, DNS, SSL, PQC, history, pivots.
Computer or cloudUpdated today
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README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
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/mcpClaude 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 ")
| 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.