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Get a pre-signature x402 payment verdict with a signed receipt.
Copy the install command and let the AI configure it · recommended for beginners
Please install the "com.blackwalltier/blackwall-x402-guardrail" MCP server from askskill: Run: claude mcp add --transport http 'com-blackwalltier-blackwall-x402-guardrail' 'https://mcp.blackwalltier.com'
Developers or platform teams can place this tool before x402 payment signing to get a GO, HOLD, or STOP verdict before deciding whether to proceed.
DevOps or platform engineering teams can feed the verdict into automation flows: continue on GO, escalate on HOLD, and stop on STOP to reduce risky or erroneous signing.
When teams need to trace why an x402 payment was allowed or blocked, they can retain the signed receipt returned by the tool as audit evidence.
It is a hosted, keyless MCP tool that provides a GO, HOLD, or STOP verdict before an x402 payment is signed and returns a signed receipt.
Based on the provided description, it is a keyless hosted MCP service, meaning it does not require an API key. For other integration details, see the source repository.
The provided information indicates that it focuses on pre-signature decisioning rather than directly executing payments, and it returns a signed receipt. For more detailed differences, see the source repository.
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