[ MCP SECURITY ]
Secure the layer where agents touch everything.
The Model Context Protocol is how AI agents reach GitHub, AWS, databases, and internal APIs. One protocol carrying that much access is a risk — and an opportunity: one enforcement point in the request path can govern all of it.
[ ONE PROTOCOL, ALL THE ACCESS ]
MCP standardized agent-to-system access, and that concentration cuts both ways. A malicious server can steer every agent that connects to it. A server holding an admin token makes every caller an admin. And an agent steered by prompt injection is still authenticated while it calls delete_repository. Most deployments authenticate the connection and then execute whatever comes over it — the per-call decision simply doesn't exist.
MCP security done properly is AI agent runtime governance applied at the protocol layer: vet the servers, authenticate the parties, authorize each call, and keep the evidence.
[ THE CONTROL STACK ]
Vet what you connect
MCP servers are third-party code holding your credentials. Review them before connecting, pin what you run, and watch for tool-description changes.
Authenticate who calls
The MCP spec's OAuth-based framework proves who is connecting. Necessary — and not sufficient, because authenticated is not the same as safe.
Authorize every call
The gap in most deployments: once connected, agents can call anything. Per-call policy — this agent, this tool, these parameters — is where MCP security is actually decided.
Keep the evidence
Every call, permitted or blocked, logged with agent identity and the rule that fired — the record that turns an incident into an investigation instead of a mystery.
[ ENFORCEMENT IN THE REQUEST PATH ]
SentnelOps implements the authorization and evidence layers as an MCP firewall — a proxy in your VPC between agents and MCP servers. Every tool call is evaluated against YAML policy before the server sees it (permit, block, or Slack approval), under 15ms p99, with every decision logged to your own database. Because the proxy sits outside the agent process, a prompt-injected agent cannot reason its way past it — the blocked call never leaves your network. It is not a gateway: gateways route, governance decides.
Put per-call authorization in front of your MCP servers
First MCP call logged in under 10 minutes. Scout is free; paid tiers start when you're ready. Or see what your agents can actually do first — we run a 10-day governance assessment in your own VPC.
Related: AI agent governance · MCP firewall