MCP Proxy Firewall
An MCP security product released by RelayShield that employs a two-layer defense-in-depth mechanism consisting of pre-deployment scanning and a runtime proxy firewall. It intercepts attacks on MCP servers such as prompt injection, credential leakage, OAuth tampering and SSRF.
Timeline (last 90 days)
The security team RelayShield launched MCP Proxy Firewall, which inserts an auditable interception layer between the agent and the MCP server.
MCP Proxy Firewall adopts defense in depth, divided into two layers: a free pre-deployment scanner and a runtime proxy firewall.
The pre-deployment scanner checks for risks such as prompt injection phrases, instruction hijacking, exfiltration instructions, dangerous capabilities, credential collection, and unauthenticated access.
The runtime proxy firewall is deployed as a reverse proxy, screening every tool call and returned result in real time, and enforcing SSRF protection, OAuth tampering detection, PII protection, threat intelligence matching, and auditable logging.
PII protection adopts a "fail-open + alert" strategy—flagging for review rather than directly blocking, to avoid harming legitimate business.
The cloud version of MCP Proxy Firewall is priced at $49 per month with unlimited scans; the pre-deployment scanner is permanently free.
All Facts (6)
MCP Proxy Firewall adopts defense in depth, divided into two layers: a free pre-deployment scanner and a runtime proxy firewall.
50%UnverifiedThe pre-deployment scanner checks for risks such as prompt injection phrases, instruction hijacking, exfiltration instructions, dangerous capabilities, credential collection, and unauthenticated access.
50%UnverifiedThe runtime proxy firewall is deployed as a reverse proxy, screening every tool call and returned result in real time, and enforcing SSRF protection, OAuth tampering detection, PII protection, threat intelligence matching, and auditable logging.
50%UnverifiedPII protection adopts a "fail-open + alert" strategy—flagging for review rather than directly blocking, to avoid harming legitimate business.
50%UnverifiedThe cloud version of MCP Proxy Firewall is priced at $49 per month with unlimited scans; the pre-deployment scanner is permanently free.
50%UnverifiedThe security team RelayShield launched MCP Proxy Firewall, which inserts an auditable interception layer between the agent and the MCP server.
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