Banking, Treasury & Agentic Finance Playbook

A safe 3-layer agentic treasury stack: (1) operating bank + vault with capped, merchant-locked cards; (2) a real-time authorization gate (/api/actionable autoActOk + issuer webhooks); (3) post-spend verification (invoice extraction + Countersign receipt + immutable double-entry ledger).

Not financial, legal or tax advice. Mercury, Increase, Column and Wise Platform are named for architecture only — they are not in the frozen 305-provider catalog, so Depot does not score or price them. “Do my taxes” stays not_covered.

The 3-layer agentic treasury stack

Layer 1: Operating Bank & Vault

GET /api/decide?jtbd=agent-banking-treasury

Hold operating cash in a real bank account and give each agent only a capped, merchant-locked instrument — never the account itself.

Components

Mercury (operating account + API + IO virtual cards) or Stripe Treasury financial accounts
Grok Bot encrypted Vault for card numbers and bank credentials (agents receive a scoped reference, not the PAN)
One virtual card per agent per merchant, capped at $500 or $1,000/mo, merchant-locked

Hard rules

No agent holds bank login credentials or full account numbers.
Card cap ≤ $1,000/mo and merchant-locked; a new merchant needs a new card and a human approval.
Transfers (ACH/wire) out of the operating account always require a human approval.

agent-banking-treasury financial-account-linking agent-virtual-cards

Layer 2: Real-Time Authorization Gate

GET /api/actionable?jtbd=agent-banking-treasury&budget=500

Decide, before money moves, whether this specific spend is allowed — with deterministic inputs, not a model's confidence.

Components

GET /api/actionable — autoActOk: true only when the price is < 30 days fresh, billing is monthly/PAYG and cancellable, and the cost is under the stated budget; otherwise it names the exact missing input
Lithic Auth Stream or Stripe Issuing real-time authorization webhooks: approve/decline each authorization against velocity limits (per-hour, per-day, per-merchant)
Near-tie rule: when /api/decide returns nearTie.isNearTie, treat the top two as co-picks and apply the workload tie-breaker before spending

Hard rules

autoActOk=false → no autonomous spend; escalate to the principal with the named missing input.
Decline any authorization over the per-card cap or outside the merchant lock, even if the agent says it is urgent.
Annual prepay, non-cancellable terms or unknown price freshness always require a human.

agentic-micropayments-x402 corporate-spend-ap-automation agent-virtual-cards

Layer 3: Post-Spend Verification & Ledger

GET /api/decide?jtbd=ledger-double-entry-accounting

Prove every spend happened as authorized and post it to an immutable ledger the principal can audit.

Components

Reducto invoice/receipt extraction (line items, totals, tax) matched against the card authorization
Countersign cryptographic receipt per spend (claim → VERIFIED) so other agents can rely on it
Immutable double-entry ledger in integer minor units with idempotency keys (OpenMeter grants / Orb / Lago, or your own Postgres ledger)

Hard rules

Every authorization has exactly one reconciled receipt within 7 days, or it is flagged for review.
Ledger entries are append-only; corrections are reversing entries, never edits.
Never use floating-point amounts; store cents (or smaller minor units) as integers.

corporate-spend-ap-automation ledger-double-entry-accounting outcome-verification