Esm MCP runs on your own machine — the client starts it, so there is no endpoint to ping.
esm.sh CDN: resolve npm package versions and browse module files. No key required.
The linked repository no longer exists on GitHub — it was deleted or made private.
Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add esm-mcp -- npx -y esm-mcp
{
"mcpServers": {
"esm-mcp": {
"args": [
"-y",
"esm-mcp"
],
"command": "npx"
}
}
}
[mcp_servers.esm-mcp]
command = "npx"
args = ["-y", "esm-mcp"]
{
"mcpServers": {
"esm-mcp": {
"args": [
"-y",
"esm-mcp"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"esm-mcp": {
"args": [
"-y",
"esm-mcp"
],
"command": "npx"
}
}
}
Package versions and CDN statistics from jsDelivr. No key required.
Look up npm and PyPI packages: versions, descriptions, and metadata. No key required.
Look up PHP packages, versions, and downloads from Packagist. No key required.
Package file metadata from the unpkg CDN. No key required.
Browse the APIs.guru directory of public APIs with metadata and versions. No key required.
Search Firefox browser extensions on AMO. No key required.
Search npm packages and inspect package metadata from the public registry. No key required.
Look up Rust crates, versions, and downloads from crates.io. No key required.
Answers built from our own checks of this server.