Supervision and Recordkeeping for n8n Agents at a Broker-Dealer

Start from what an examiner will ask

FINRA Rule 3110 requires each member to establish and maintain a supervision system reasonably designed to achieve compliance, and it places final responsibility for proper supervision on the member. Delegating a task to an agent, or to a vendor that hosts the agent, does not move that responsibility. FINRA Rules 3110 and 3120 also expect written supervisory procedures that are reasonably designed to meet recordkeeping obligations, and supervisory control procedures that test whether they work.

On the records side, Exchange Act Rule 17a-4 sets retention periods. Records required by Rule 17a-3(a)(1)-(3), (5), (21) and (22), and analogous records, are kept at least six years, with the first two years in an easily accessible place. A further category under Rule 17a-4(b) is kept at least three years, again with the first two easily accessible. Rule 17a-4(f) sets format requirements for firms that keep required records on an electronic recordkeeping system. Rule 17a-4(b)(4), together with FINRA Rules 3110.09 and 2210(b)(4), addresses business-related communications, including email, instant message, text message and chat message.

No rule in this frame is written specifically for AI agent outputs. FINRA's 2026 Annual Regulatory Oversight Report is guidance, and it says GenAI can implicate supervision, communications, recordkeeping and fair dealing. For AI agents, it points firms to four areas: system access and data handling, human-in-the-loop oversight, tracking of agent actions and decisions, and limits on agent behaviors, actions or decisions. Which record category a given agent output falls into is a determination each firm has to make and document. The four areas give a practical structure for the controls below.

Runtime enforcement versus review after the fact

There are two broad ways to supervise an agent. The first is to review what happened: sample execution history and application logs, and look for problems. The second is to enforce policy in the execution path, so that each action is evaluated before it takes effect and the outcome is allow, redact, block or escalate for human approval. This second pattern maps closely to what FINRA describes as limiting agent behaviors, actions or decisions.

The distinction matters for evidence. Review after the fact can show that an action occurred. It does not by itself show which policy applied, whether the action was permitted, or who approved an exception. Existing workflow execution history and logs are built for operations and debugging, so test whether they record those elements before relying on them as supervisory evidence. Where they do not, the gap falls on the compliance team to explain.

Runtime enforcement has tradeoffs. Policies that are too broad block legitimate work, and escalation queues add latency and need staffing. The design question to settle in advance is what happens to an action while approval is pending or after it is denied. The defensible default is that the action does not proceed. Both outcomes should be recorded.

Where Trussed fits

Trussed is runtime control and evidence infrastructure for regulated enterprises. It enforces policy in the execution path on individual interactions and tool calls, with outcomes of allow, redact, block, rate limit or escalate for human approval. That enforcement generates continuous, audit-ready evidence. It can be self-managed in the customer's cloud, with configurable retention and data residency, which bears directly on the control and residency questions above.

The scope is individual interactions and tool calls. Trussed's deepest experience is in insurance, a regulated financial sector, and it has customers across insurance, pharma, healthcare and education. It does not claim broker-dealer deployments, so a firm should test any fit against its own Rule 17a-4 and WSP requirements. That means mapping the evidence to its record categories, retention periods and approval designations, and confirming it with counsel before relying on it.

The controls described in this guide do not depend on any one product. A firm that builds them itself should hold the result to the same test: can an examiner inspect what the agent was allowed to do, what it did, and who approved the exceptions?