Agents

How do you build a finance AI agent safely?

In finance, the agent reads and prepares while humans approve and execute. Give it read-only access to ledgers and documents, let it reconcile, categorise, detect anomalies and draft entries, and require two-person approval for anything that moves money. Keep an immutable audit trail, enforce limits in code, and keep regulated data inside an approved boundary.

Key facts

Default modeRead-only: analyse, reconcile, categorise, draft
ApprovalsTwo-person control for payments, journal entries and limit changes
AuditImmutable, timestamped logs of every retrieval, draft and decision
LimitsHard caps on amounts, volumes and counterparties enforced in code
ReconciliationThe agent flags mismatches; humans resolve them
Data boundaryRegion-locked VPC, on-prem or air-gapped deployment
Model routingStructured extraction on small models, reasoning on frontier
StatusFunction calling, JSON mode, embeddings and audit logs are live

TL;DR

  • The agent prepares and reconciles; humans approve and move money.
  • Enforce amount, volume and counterparty limits in code, not in prompts.
  • Two-person approval plus immutable logs are the non-negotiables.
  • Read-only by default; any write capability is narrow and separately approved.
  • Keep regulated data in an approved region or on-prem boundary.

How it works, step by step

  1. Map the workflows and mark where money, balances or reported figures can change.
  2. Start read-only: reconciliation, anomaly detection, categorisation and draft entries.
  3. Enforce hard limits on amounts, frequency and counterparties in code.
  4. Add two-person approval for every action that moves or commits money.
  5. Write immutable audit records linking source documents, drafts and approvals.
  6. Validate outputs against control totals before anything reaches a ledger.
  7. Pilot in one workflow, with daily reconciliation and a rollback plan.
1Map the workflowsand mark wheremoney, balances or2Start read-only:reconciliation,anomaly detection,3Enforce hard limitson amounts,frequency and4Add two-personapproval for everyaction that moves5Write immutableaudit recordslinking source6Validate outputsagainst controltotals before

Try it yourself

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The rule: agent prepares, humans approve

Finance is where agent enthusiasm meets consequence. A mispriced refund or a duplicated payment is not a model-quality issue; it is a financial event with reporting and regulatory follow-up. The workable division is clear: the agent does the reading, matching, categorising and drafting, and an authorised human approves anything that changes the books or moves funds.

This is not a limitation of current models so much as a control requirement. Even a highly accurate agent needs a control environment auditors can inspect, and separation of duties is the foundation of that environment.

Controls that regulators look for

  • Separation of duties: the identity that prepares an action is not the identity that approves it.
  • Limits: amount, velocity and counterparty caps enforced outside the model.
  • Immutability: append-only logs with approver identity, timestamps and source references.
  • Reversibility: defined reversal procedures for every automated action.
  • Data boundaries: regulated data stays in an approved region or on-prem.
  • Monitoring: alerts on limit breaches, unusual patterns and failed reconciliations.

Where agents genuinely help in finance

The high-value work is tedious and text-heavy: matching invoices to purchase orders, extracting terms from contracts, flagging duplicate payments, categorising transactions, and preparing reconciliation summaries. These tasks are repetitive, verifiable and currently consume analyst time disproportionate to their value.

Track accuracy with control totals, not vibes: dollars reconciled, exceptions raised, time saved per cycle and reversal rate. On Plugsky, function calling, JSON mode, embeddings and audit logging are live, with region-locked deployment plus VPC, on-prem and air-gapped options for regulated data. 30+ models on one key let extraction run on a cheap model while reasoning uses a frontier one. Plans are on the live pricing page; batch endpoints are coming soon for high-volume cycles.

Honest comparison

Finance taskAgent roleControlFailure impact
Invoice matchingMatch and flag exceptionsRead-only plus samplingPayment delay or duplicate
Contract term extractionExtract and cite clausesSchema validationWrong obligation recorded
Transaction categorisationSuggest categoriesReview thresholdMisstated accounts
Draft journal entriesPrepare entryTwo-person approvalBooks misstated
Payments and transfersMust not executeDual control, hard limitsFinancial loss

Frequently asked questions

Can an AI agent move money?

It should not execute payments autonomously. Prepare, validate and propose, with dual control and hard limits enforced outside the model for execution.

How do we satisfy auditors?

Show separation of duties, immutable logs, enforced limits, reconciliation evidence and a documented reversal path. Design controls before deployment, not during audit.

What should we automate first?

Invoice matching, contract data extraction and anomaly flagging. They are repetitive, verifiable and already have control totals to check against.

How do we prevent duplicates?

Idempotency keys on every action, reconciliation against the ledger before and after, and velocity limits that surface repeated attempts.

Can it run on-prem?

Yes. Plugsky supports region choice plus VPC, on-prem and air-gapped deployment, so regulated financial data can stay inside your boundary.

How do we measure success?

Dollars reconciled, exception rate, analyst hours saved per cycle, reversal rate and audit findings. Review them together.

What about model accuracy claims?

Do not rely on vendor claims. Build a labelled evaluation set from your own documents and monitor accuracy per task before and after every change.