Runtime Control for the MCP Layer
MCP turned every agent into a client and every tool into a target. Impart stops malicious tool use, unauthorized access, and unsanctioned MCP servers before a single tool call executes.
MCP protection at runtime that enforces, not just observes.
Most MCP security stops at discovery dashboards or static policy. Impart evaluates and acts upon every tool call inline: who's calling, what server they're reaching, which tool they're invoking, and whether they should be.
Inspect
every MCP request in full context. The caller's identity, the server being reached, the tool being invoked, the arguments being passed, and the session history behind it.
Decide
what the call is actually trying to do. Intent gets classified against your catalog and your policy, not against a static signature list.
Enforce
unauthorized tool use stops before execution. The decision happens inline, in milliseconds. Block, modify, or allow. The behavior is yours to define.
Catalog-aware MCP enforcement.
You can't govern what you haven't catalogued, and you can't catalog what you can't see at runtime. Impart builds the picture from live traffic on the same enforcement engine that inspects your full attack surface, then enforces against it:
every MCP server and every tool. Build a live catalog of every MCP server reaching your environment, sanctioned or not, and every tool exposed by each one.
non-conforming tool use. A caller using a tool they shouldn't. A tool invoked from a server that was never approved. A sequence of calls that fits a known abuse pattern. Detection runs on the full session, not on isolated requests.
policy inline, before the tool runs. Rules are written against live traffic and refined continuously. Policy-as-code applies the same way to AI clients, CLI users, web apps, and direct API callers. Malicious or non-conforming calls are stopped before the tool executes downstream.
One runtime engine for every MCP caller.
Inline
Sits between the caller and the MCP server. Enforcement fires before the tool is invoked, not after the side effect
Stateful
Full interaction history maintained across the session. Caller behavior accumulates across tools and servers, and enforcement tracks it
Unified
Whatever path a caller takes through your stack, the runtime knows who they are. No clean slate on pivot.
What a blocked attack looks like in Impart.
MCP attacks rarely come from a single tool call. Impart sees the sequence and stops it in real time.
Running in production. Enforcing in real time.
"The Impart team is really innovating in the API security space. Really smart use of LLMs in their product that help security teams especially with firewall rules, which are a huge problem."
"API security is now a critical aspect of every application security program. Every CISO needs to have an integrated solution that can comprehensively protect their APIs across their entire lifecycle."
"Great product. Great team. Makes application security so much easier and installs in minutes across both legacy and modern tech stacks."
"When we think about examples of customer love in cybersecurity, some of the most loved companies in security includes Impart Security."
"Hands down one of the best API security products on the market and the most compelling solution for serverless. Integrates with no architecture impact, and great team to work with."
"Examples like Thinkst Canary, Duo Security, Tines, Chainguard, Material, Impart, Panther, Anvilogic, and LimaCharlie show that it is possible to be pragmatic (and successful!) as a business and loved at the same time."
"The team is building something truly top notch in WAF, API Security, and LLM Protection."
All
runtime decisions
"Nothing drives me more than getting to work with highly motivated and super intelligent people. I am happy to be here and looking forward to the long road ahead!"
"Impart is my pick to lead the next wave in application security tooling by leveraging usage (and other) context for decisions and making it visible to both security teams and developers. This unifies two themes in security today: Shift Left and Protect Right."
"I have a sophisticated app sec team, and they regularly complain about how limiting form-based rule builders are. They will be pumped to hear about the ability to build more sophisticated rules via code. Same with dynamic runtime lists. The LLM-powered rule explainer is also pretty cool. It is gen AI that is actually useful, as opposed to framing in another gen AI chatbot and calling it a day."
"Impart offered Crossbeam a single, unified solution for Web application, API security, and LLM protection.The team has provided exceptional support and is a true partner for us."
"Impart has everything you'd want in an API security platform, and there's little reason to look elsewhere - they provide discovery, testing, and protection—all in a single platform. Impart’s combination of accurate discovery with anomaly detection made them stand out in a crowded space filled with other great tools."
"Impart saved the day during a security incident when our WAF and our SIEM failed to detect and mitigate an ongoing API attack. Impart effortlessly detected and stopped the attack for us, with great support from the team."
"We've dramatically reduced our cycle time for adapting to new threats—we can now match the velocity of attackers instead of always playing catch-up. Impart has made our entire security operation more surgical and effective."
30
100%
FAQ
Gateways route. Impart enforces. A gateway gives you a single ingress point; it doesn't tell you whether a given caller should be invoking a given tool, in a given sequence, with given arguments. Impart classifies intent against your catalog and policy and acts on it inline.
They show up in the catalog the first time they appear in traffic. Shadow servers, experimental servers, servers a team spun up without telling security — all surface the same way as sanctioned ones. From there, you decide what's approved and what isn't.
You decide. Allow, block, and modify are all valid actions. Many teams modify — sanitize the arguments, strip the unauthorized scope, return a controlled response — rather than block outright. The behavior is configurable per rule.
Enforcement fires on every call in the sequence, with full session context. If a chain is moving toward an unauthorized action, Impart stops it at the step that crosses the line — not after the chain has already completed.