BLACK_WALL
A pre-action risk gate for autonomous AI agents. Before an agent takes an irreversible or high-stakes action, it calls one tool and gets back a risk score, a reversibility class, named red flags, and a verdict — in a few seconds — so it knows whether to proceed, confirm with a human, or stop.
Free tier, no credit card. Get a key at https://blackwalltier.com
What it does
It runs before an action, not after. It's the judgment layer that decides whether a proposed action should happen now — catching what static permission rules can't:
- Prompt injection
- Anomalous amounts
- PII in the wrong place
- Destructive SQL (
DELETE/DROPwith noWHERE) - Prod-from-staging
- Irreversible deletes with no backup
It complements rollback, backups, audit logs, and observability — all of which act after the damage. Black_Wall acts before.
The one tool: forecast
Call it with the action and its payload:
- action — what the agent intends to do (
send_email,run_sql,make_payment,file_delete,post_content,transfer_crypto...). Free-form is fine. - inputs — the concrete payload (recipient, amount, SQL statement, file path, message body).
- context (optional) —
agent_role,user_intent,prior_actions,prior_findings.
You get back:
- recommendation —
GO/CAUTION/STOP - risk_score — 0–100
- reversibility —
REVERSIBLE/RECOVERABLE/IRREVERSIBLE(+ rollback cost & window) - gate —
AUTO/CONFIRM/HUMAN_REQUIRED(derived from risk AND reversibility — an irreversible action is gated at a lower threshold) - red_flags — named codes with severity
- alternative_actions — concrete safer actions to take instead
How an agent acts on the verdict
AUTO/GO→ proceed.CONFIRM/CAUTION→ confirm with a human first.HUMAN_REQUIRED/STOP→ do not act. The action has not executed — don't build downstream logic on it. Surface the red flags and pivot to an alternative.
Worked example
Request: action=run_sql, inputs={"statement":"DELETE FROM users;"}
Response: recommendation=STOP, risk_score=92, reversibility=IRREVERSIBLE, gate=HUMAN_REQUIRED, red_flags=[SQL_NO_WHERE, DESTRUCTIVE_VERB, IRREVERSIBLE_NO_BACKUP], alternative_actions=["Add a WHERE clause scoped to inactive customers and take a snapshot first"].
Install
{
"mcpServers": {
"blackwall": {
"command": "npx",
"args": ["-y", "blackwall-mcp"],
"env": { "BLACKWALL_API_KEY": "bw_live_your_key_here" }
}
}
}
Server Config
{
"mcpServers": {
"blackwall": {
"command": "npx",
"args": [
"-y",
"blackwall-mcp"
],
"env": {
"BLACKWALL_API_KEY": "bw_live_your_key_here"
}
}
}
}Recommend Servers
View All高德地图官方 MCP Server
A Serper MCP Server