Covalent Bond runs on your own machine — the client starts it, so there is no endpoint to ping. 38 installs a week from npm. Last commit 6 Aug 2026.
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We read the source, 22 h ago · rules 3dff92dd89df
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
const child = spawn(command.cmd, command.args, {
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
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 covalent-bond -- npx -y covalent-bond
{
"mcpServers": {
"covalent-bond": {
"args": [
"-y",
"covalent-bond"
],
"command": "npx"
}
}
}
[mcp_servers.covalent-bond]
command = "npx"
args = ["-y", "covalent-bond"]
{
"mcpServers": {
"covalent-bond": {
"args": [
"-y",
"covalent-bond"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"covalent-bond": {
"args": [
"-y",
"covalent-bond"
],
"command": "npx"
}
}
}
This one needs environment variables set before it will start:
COVALENT_RELAY_URL (Relay endpoint both peers meet at. Set to the public relay (https://covalent-bond-relay.gopalrajsuresh.workers.dev) or your own deployed Cloudflare Worker. Defaults to http://localhost:8787 (local mock relay) when unset.), COVALENT_NOTIFICATIONS (Set to 'off' to disable desktop notifications for incoming events.), COVALENT_MAX_FILE_KB (Per-file size cap in KB for transfers. Defaults to 256; clamped to a 384 KB ceiling.).
The author declared them in the registry entry; get the values from the project itself.
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Answers built from our own checks of this server.