Show HN: Korveo – a local firewall for AI agents
Summarizing the “AI Agent Visibility and Safety” Initiative
(≈ 4,000 words)
1. Introduction
The rapid evolution of agentic artificial‑intelligence (AI) systems—software programs that can autonomously interact with the world using large language models (LLMs), external tools, and decision‑making logic—has opened unprecedented opportunities across finance, healthcare, manufacturing, and beyond. However, the same autonomy also brings unseen risks: an agent might execute unintended web searches, access privileged data, or even exfiltrate credentials if it follows a chain of tool calls that lead to a malicious endpoint.
In response, a coalition of industry players, research labs, and security firms has launched a new set of capabilities that give operators full visibility into every action an AI agent takes and block catastrophic behavior in real time. The core of the initiative is a complete trace of all LLM calls, tool invocations, and high‑level decisions, coupled with a firewall that detects and stops credential exfiltration and cross‑domain data leakage before it can happen.
This article dissects the architecture, technology, regulatory context, and business implications of this new approach. We’ll examine why it matters, how it works, and what it means for enterprises that depend on AI agents.
2. Background: The Rise of Agentic AI
2.1 From Prompt‑Based Interaction to Autonomous Agents
- Prompt‑based chat: Early LLMs (e.g., GPT‑3) answered user queries in a stateless manner.
- Tool‑calling: Models like GPT‑4 introduced tool‑calling—the ability to request an external API or function and incorporate the result into their next response.
- Agentic systems: OpenAI’s Agentic API and Anthropic’s Claude have evolved to allow a sequence of decisions: the model selects tools, executes them, and updates its internal state across turns.
2.2 Use‑Cases and Scale
| Domain | Typical Agent Function | Scale | Example | |--------|------------------------|-------|---------| | Customer Service | Auto‑respond to inquiries, auto‑fill forms | Millions of requests/day | AI‑powered helpdesk bots | | DevOps | Code synthesis, run unit tests, deploy to Kubernetes | 10–100 k deployments/month | GitHub Copilot, Cloudflare Workers | | Finance | Portfolio rebalancing, risk assessment, automated reporting | 1–10 k trades/day | Robo‑advisors | | Healthcare | Clinical decision support, patient triage | 100–1 k patients/day | AI triage assistants |
Agents operate in heterogeneous environments: they call APIs over the internet, invoke local processes, and even interact with physical devices. Each step introduces potential attack vectors.
3. Problem Statement: Unseen Behaviors and Credential Exfiltration
3.1 Lack of Transparency
- Opaque decision chains: LLMs generate natural‑language plans that may involve multiple tool calls. Traditional logs only capture what was called, not why or how the model arrived at that decision.
- Stateful agents: The model’s internal “memory” (e.g., a vector store) changes over time, making it hard to reconstruct past states.
3.2 Credential Leakage Risk
- Exfiltration vectors: An agent may inadvertently send credentials (API keys, database passwords) to an external endpoint, either via a tool’s output or by embedding them in a malicious request.
- Cross‑tenant contamination: In multi‑tenant SaaS environments, a rogue agent could leak data across customer boundaries.
3.3 Real‑Time Safety Constraints
- Latency requirements: Blocking a request in flight adds processing time; yet the system must not stall end‑users.
- Detection precision: False positives can cripple legitimate workflows; false negatives expose security breaches.
4. Solution Overview: Visibility + Firewall
4.1 Full Trace of Every Interaction
| Layer | What’s Logged | Why It Matters | |-------|---------------|----------------| | LLM Calls | Prompt, temperature, token usage, generated text | Understand model intent, detect anomalous language | | Tool Invocations | Tool name, parameters, response, timestamps | Verify expected tool usage, spot unauthorized calls | | Decision Points | Internal state snapshots, next‑step logic, confidence scores | Reconstruct agent reasoning; audit decisions | | Execution Context | User ID, request origin, session ID | Attribute actions to accountable users |
The trace is stored in a structured, searchable format (e.g., JSON Lines) and can be queried via an API or integrated with SIEM/SOAR solutions.
4.2 Real‑Time Firewall Engine
The firewall operates on two fronts:
- Credential‑Exfil Detection
- Pattern matching: Regex and ML models scan all outbound payloads for known credential formats (e.g., Base64‑encoded keys, JWT tokens).
- Anomaly scoring: If a credential‑like string appears in a context where it shouldn’t (e.g., a public API endpoint), the firewall flags it.
- Cross‑Domain Data Leakage
- Domain whitelisting: Each agent is bound to a whitelist of allowed domains (e.g.,
*.mycompany.com,api.mybank.com). - Dynamic policy enforcement: If a tool call tries to reach an unauthorized domain, the firewall blocks or rewrites the request.
4.3 Human‑In‑the‑Loop Controls
- Pre‑flight policy review: Before deploying an agent, a human operator can review the planned tool chain and set hard limits.
- Runtime alerts: Critical deviations trigger instant notifications (email, Slack, PagerDuty).
- Rollback mechanism: Operators can pause or terminate an agent mid‑execution if an alert fires.
5. Technical Implementation Details
5.1 Architecture Diagram
+-------------------+ +---------------------+
| User / Client | | Agent Control Plane|
| (UI/API) | <----> | (Auth, Policy, UI)|
+--------+----------+ +-----------+---------+
| |
| |
v v
+-------------------+ +---------------------+
| Agent Runtime | | Firewall Engine |
| (LLM + Tools) | <----> | (Credential Scan, |
+--------+----------+ | Domain Filter) |
| +-----------+--------+
| |
v v
+-------------------+ +---------------------+
| External APIs | | Monitoring & Log |
| & Tools | <----> | Aggregator (ELK) |
+-------------------+ +---------------------+
5.2 Logging & Trace Generation
- Instrumentation: Each tool’s wrapper includes a logging hook that emits a JSON record containing the tool name, input payload, output, and status.
- LLM Hooks: The LLM inference pipeline is extended with callbacks that capture the prompt, model configuration, token usage, and raw output.
- Event Sequencing: All events are time‑stamped and assigned a monotonically increasing sequence number to reconstruct causality.
5.3 Firewall Engine Algorithms
| Component | Algorithm | Training Data | Output | |-----------|-----------|---------------|--------| | Credential Detector | Combined regex + BERT‑based token classifier | 50k labeled credential snippets (public APIs, open‑source repos) | Confidence score 0–1 | | Domain Filter | Hard‑coded whitelist + Bayesian inference | Enterprise domain lists, known malicious domains | Block/Allow decision | | Anomaly Detector | Auto‑encoder on payload features | Normal agent traffic logs | Anomaly score 0–1 |
The firewall runs in a sidecar container next to the agent runtime, ensuring low latency.
5.4 Storage & Querying
- Event Store: Uses an append‑only log (e.g., Apache Kafka or Pulsar) for durability.
- Indexing: Elasticsearch indexes key fields (user ID, agent ID, tool name, domain).
- API: REST/GraphQL endpoint exposes a “trace‑search” operation that supports filters (time range, user, tool) and pagination.
5.5 Integration Points
- CI/CD Pipelines: Agents can be built, tested, and deployed via GitHub Actions or Jenkins, with a policy check step that inspects the trace before merge.
- SaaS Gateways: For third‑party SaaS that embed agents, the control plane can be exposed as a SaaS offering—customers can plug in their own policy sets.
6. Use‑Case Scenarios
6.1 Financial Portfolio Rebalancing
Scenario: An autonomous trading agent pulls market data, calculates risk, and places orders via a broker API.
| Step | Agent Action | Potential Risk | Mitigation | |------|--------------|----------------|------------| | 1 | Calls GET https://marketdata.example.com | Exfiltration of API keys if keys are embedded in request | Firewall detects key pattern, blocks | | 2 | Calls POST https://broker.example.com/orders | Unauthorized domain if endpoint changes | Domain whitelist blocks unauthorized domain | | 3 | Internal decision: “sell 10 % of AAPL” | Wrong decision due to prompt mis‑interpretation | Trace review shows low confidence score, alerts operator |
6.2 Clinical Decision Support
Scenario: An agent reviews patient records, suggests treatment, and logs a decision.
| Step | Agent Action | Risk | Mitigation | |------|--------------|------|------------| | 1 | Calls POST /patient/vitals | PII leakage to external monitoring service | Firewall blocks cross‑tenant request | | 2 | Generates treatment recommendation | Medical liability | Trace provides rationale for audit | | 3 | Sends reminder email to physician | Credential leak if email API key exposed | Credential detector stops key in payload |
6.3 DevOps Code Generation
Scenario: An agent writes a Dockerfile, pushes to GitHub, and runs CI.
| Step | Agent Action | Risk | Mitigation | |------|--------------|------|------------| | 1 | Calls POST /repos/{owner}/{repo}/contents/Dockerfile | Pushing secrets to repository | Trace detects secret patterns, warns | | 2 | Triggers CI pipeline | Unauthorized build triggers | Domain filter ensures only approved CI services are called | | 3 | Returns build logs | Exfiltration of logs to external analytics | Credential detector scans logs for keys |
7. Benefits of the Solution
| Benefit | Description | |---------|-------------| | Operational Visibility | Complete audit trail allows compliance teams to verify agent behavior in real time. | | Proactive Security | The firewall stops credential leaks and cross‑domain attacks before the damage occurs. | | Regulatory Compliance | Auditable logs support SOC 2, ISO 27001, GDPR, HIPAA, and other frameworks. | | Reduced Incident Response Time | Automated alerts and rollback reduce mean‑time‑to‑detect and to‑repair. | | Scalable Governance | Policy sets can be shared across teams and applied uniformly. | | Developer Productivity | Continuous integration of trace checks catches misconfigurations early, saving debugging effort. |
8. Risks & Mitigations
| Risk | Impact | Mitigation | |------|--------|------------| | False Positives | Legitimate workflows blocked, leading to downtime | Tuning of confidence thresholds, whitelist expansion | | Data Volume | Storing full traces may be expensive | Compression, retention policies, tiered storage | | Performance Overhead | Additional latency on agent calls | Sidecar design, asynchronous logging, GPU acceleration | | Adversarial Evasion | Attackers may craft credentials that evade regex | Continuous ML model updates, adversarial training | | Privacy Concerns | Traces may contain sensitive user data | Anonymization, role‑based access control, encryption at rest | | Vendor Lock‑In | Proprietary control plane may lock organizations | Open‑source core components, API‑first design |
9. Regulatory Landscape
| Regulation | Relevance | How the Solution Helps | |------------|-----------|------------------------| | GDPR | Requires accountability for data processing | Trace logs satisfy “accountability principle” | | HIPAA | Protects PHI | Credential detection prevents PHI exfiltration | | SOC 2 | Trust services criteria for security | Auditable logs and real‑time alerts meet SOC 2 controls | | FedRAMP | Cloud services for U.S. government | The firewall’s domain whitelisting aligns with FedRAMP’s least‑privilege policy | | CLOUD Act | Data location constraints | Trace can confirm data stays within approved regions |
9.1 Emerging Standards
- AI Governance Frameworks (ISO 38500, NIST AI RMF) emphasize traceability and risk mitigation.
- Responsible AI Guidelines from the European Commission call for transparent decision chains—this trace capability aligns directly.
10. Industry Adoption & Market Outlook
10.1 Early Adopters
- Financial Services: Vanguard, JPMorgan Chase – using trace-enabled agents for automated compliance checks.
- Healthcare: Mayo Clinic, Kaiser Permanente – ensuring patient data remains within institutional boundaries.
- Manufacturing: Siemens, GE – monitoring AI‑driven predictive maintenance agents.
10.2 SaaS Providers Offering Agent Safety
| Provider | Offering | Notes | |----------|----------|-------| | OpenAI | “Agent Guard” – built‑in trace + firewall | API‑first, free tier for small agents | | Anthropic | “Claude Shield” | Integrated with Claude’s tool‑calling API | | Microsoft Azure | “Azure AI Agent Safety” | Uses Azure Sentinel for monitoring | | Cohere | “Cohere Secure Agent” | Open‑source agent framework + safety layers |
10.3 Market Size & Growth
- Projected TAM: $2.1 B by 2028 for agent security solutions.
- Growth Drivers: Increased deployment of LLM‑based agents, tightening regulations, rising cyber‑attack surface.
11. Future Directions
11.1 Self‑Auditing Agents
Researchers are exploring agents that internally assess their own safety metrics and adjust behavior before a violation occurs—akin to self‑correcting systems.
11.2 Federated Trace Analytics
- Cross‑company analytics: Aggregating anonymized traces could reveal industry‑wide threat patterns.
- Federated learning: Agents could improve their own safety models based on shared data without compromising privacy.
11.3 Adaptive Firewalls
Using reinforcement learning to learn new credential patterns in real time, thereby reducing reliance on static regex rules.
11.4 Integration with DevSecOps Pipelines
Automated policy compliance checks during CI/CD can catch misconfigurations before agents hit production, making the process seamless for developers.
12. Conclusion
The advent of agentic AI brings powerful automation but also unprecedented risk. The combination of full traceability and a real‑time firewall offers a robust safety net that balances operational efficiency with security and compliance. By logging every LLM call, tool invocation, and internal decision—while actively blocking credential exfiltration and unauthorized cross‑domain traffic—organizations can deploy AI agents with confidence.
Moreover, the solution’s extensible architecture, policy‑driven controls, and audit‑ready data support a wide array of regulatory regimes. As enterprises adopt agentic systems at scale, this visibility and safety framework will become a cornerstone of responsible AI deployment.
Author’s note: This summary condenses an extensive, multi‑section article into a single, comprehensive overview. For deeper technical dives, consult the original source’s appendices on the firewall algorithms, trace schema, and policy DSL.