Browse MCP servers

MCP Harbor, an MCP Server Registry, Directory, and Tower to Buzz.

2 matching

filtered by com.blackwalltier clear all

Showing 1–2 of 2 servers

blackwall x402 guardrail
streamable-http

com.blackwalltier/blackwall-x402-guardrail

Keyless hosted MCP: pre-signature x402 payment verdict (GO/HOLD/STOP) with a signed receipt.

official
blackwall
stdio

com.blackwalltier/blackwall

API-key pre-action risk gate: any irreversible agent action (money, SQL, delete, email).

official 2 secrets

Search this catalogue from your agent

The registry is itself an MCP server. Add it once and your agent runs these same searches, with no account and no key.

claude mcp add --transport http mcp-registry-search https://ai.mcpharbor.dev/mcp