Task-shaped guides. The patterns most apps need in their first hour.
Each guide on this page solves one task end-to-end. Pick the one that matches what you're trying to ship; come back for the rest as you grow.
🚪 Sign Up and Onboard
Self-provision a sandbox tenant; log in as a human or point an agent at it.
📊 Read a Financial Picture
Pull balances, transactions, obligations, and counterparties for a tenant.
💸 Pay an Invoice Safely
Propose a payment, route to approval if needed, execute, get a receipt.
🛡 Give an Agent a Spending Limit
Define a policy in plain English. Brain enforces it on every proposed action.
🔌 Let an External Agent In
Authorize an MCP-compatible agent to read and propose on a tenant's behalf.
🧩 Use Brain Agent Skills
Install task-specific recipes for Brain's MCP proposal surface.
You finished the Quickstart
The SDK is installed, your API key works, a tenant exists
You're in sandbox
Production works the same way; sandbox is just safer
You're calling from a backend
Server keys never go in client-side code
import { Brain } from "@brainfinance/sdk";
export const brain = new Brain({ apiKey: process.env.BRAIN_API_KEY });The SDK methods you already know
Each guide reuses brain.ask, brain.pay, brain.approve, brain.proof
Idempotency keys
Required on every mutating call; retries are free
Trace IDs
Returned on every response; paste into the Console for the full timeline
Webhooks
Subscribe once, get notified on the events you care about
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