Chatpack MCP vs Hazmat Cfr MCP
A side-by-side look at the Chatpack MCP and Hazmat Cfr MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
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Chatpack MCPDeveloper Tools · Local subprocess (stdio)Read-only MCP server for Chatpack documentation, framework setup guides, and React UI block source. Runs locally over stdio with npx -y @chatpack/mcp. Node.js 20 or later; MIT license; no account or API key required.86ExcellentAuth: no auth requiredVerdict: choose Chatpack MCP for developer tools work as a local process; choose Hazmat Cfr MCP for developer tools as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
CChoose Chatpack MCP when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You want tools like
search_docs, get_document, get_integration_guide.
Choose Hazmat Cfr MCP when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- You want tools like
lookup_hazmat_entry, classify_shipping_description, validate_basic_hazmat_description.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | C Chatpack MCP | |
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Quality signal | 86/100 · Excellent | 61/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | No auth required | Not declared |
| Pricing | Free | Not declared |
| Required env vars | None listed | None listed |
| Verified owner |
Tools & capabilities
Chatpack MCP tools 5
search_docsSearch bundled Chatpack documentation and the authoritative llms reference. Returns document ids, links and matching excerpts with package versions.get_documentRead a complete bundled Chatpack document by id. Use llms for the authoritative integration contract or concepts/errors for troubleshooting.get_integration_guideRetrieve the repository's framework setup guide with authentication guidance and the authoritative llms reference. Examples match the bundled package versions.list_ui_blocksList public runtime exports of @chatpack/ui, including components, providers and utilities. Returns names accepted by get_ui_block.get_ui_blockRetrieve a public @chatpack/ui export's source module and usage guide. Optionally include supporting UI modules and stylesheet. Files are reference source, not a standalone copy-and-paste component.
Hazmat Cfr MCP tools 11
lookup_hazmat_entryLook up a hazardous material by UN/NA number or proper shipping name in the complete 49 CFR 172.101 Hazardous Materials Table (pinned eCFR snapshot). Returns matching entries with decoded symbols and special provisions.classify_shipping_descriptionParse a basic DOT shipping description into UN/NA number, proper shipping name, hazard class, and packing group.validate_basic_hazmat_descriptionValidate a structured DOT hazmat description against the complete 49 CFR 172.101 Hazardous Materials Table.get_label_requirementsReturn hazard label codes for a UN/NA number or proper shipping name from the complete 49 CFR 172.101 Hazardous Materials Table.check_basic_segregationRun conservative pairwise segregation warnings for supplied hazard classes using a small encoded subset of 49 CFR 177.848 logic.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Chatpack MCP
{
"mcpServers": {
"chatpack-mcp": {
"command": "npx",
"args": [
"-y",
"@chatpack/mcp"
]
}
}
}
Hazmat Cfr MCP
{
"mcpServers": {
"hazmat-cfr-mcp": {
"command": "npx",
"args": [
"-y",
"hazmat-cfr-mcp"
]
}
}
}
Frequently asked questions
Chatpack MCP is categorized under Developer Tools and uses a local stdio subprocess. Hazmat Cfr MCP belongs to Developer Tools and uses a local stdio subprocess. Pick Chatpack MCP for developer tools work and Hazmat Cfr MCP for developer tools.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Chatpack MCP is listed as free. Auth: no auth required. Hazmat Cfr MCP has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add chatpack-mcp and hazmat-cfr-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Chatpack MCP has a quality signal of 86/100 (Excellent) with 2 views, 0 installs and 224 GitHub stars. Hazmat Cfr MCP has 61/100 (Good) with 2 views, 0 installs and 1 GitHub stars.
