Blackwall runs on your own machine — the client starts it, so there is no endpoint to ping. 113 installs a week from npm. Last commit 15 Sep 2026.
API-key pre-action risk gate: any irreversible agent action (money, SQL, delete, email).
Nothing serious here today
Today is the operative word: we check Blackwall every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
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 blackwall -e 'BLACKWALL_API_KEY=<BLACKWALL_API_KEY>' -- npx -y blackwall-mcp{
"mcpServers": {
"blackwall": {
"command": "npx",
"args": [
"-y",
"blackwall-mcp"
],
"env": {
"BLACKWALL_API_KEY": "<BLACKWALL_API_KEY>"
}
}
}
}[mcp_servers.blackwall]
command = "npx"
args = ["-y", "blackwall-mcp"]
env = { BLACKWALL_API_KEY = "<BLACKWALL_API_KEY>" }{
"mcpServers": {
"blackwall": {
"command": "npx",
"args": [
"-y",
"blackwall-mcp"
],
"env": {
"BLACKWALL_API_KEY": "<BLACKWALL_API_KEY>"
}
}
}
}{
"servers": {
"blackwall": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"blackwall-mcp"
],
"env": {
"BLACKWALL_API_KEY": "<BLACKWALL_API_KEY>"
}
}
}
}Put your own value in place of
<BLACKWALL_API_KEY> (Your BLACK_WALL API key (bw_live_…) from https://blackwalltier.com/dashboard/keys).
The author’s registry entry marks it as required.
Optional settings from the registry entry, left out of the block above:
BLACKWALL_MODE (observe (log only, never block) or enforce (default)).
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Blackwall — questions
Answers built from our own checks of this server.