Sandbox environment. Interpose is not a registered broker-dealer and holds no FINRA approval. Every API documented here is available in a simulated evaluation environment only — no client assets are held, no real trades are executed, and no custody is provided. The calculation engines are the production code paths; fills, custody, settlement and KYC decisioning are simulated. What is real and what is simulated →
API Reference
Brokerage-as-a-Service
The brokerage operations a wealth or investing integration reaches for first, rendered from the specification the service is built against: accounts and KYC, order placement and routing, positions and tax lots, the transaction ledger, funding, corporate actions and market data. The base path is https://interposehq.com/api/v1/baas.
This page is generated from the checked-in specification, which makes it the wrong place to learn the handful of things that are easier to get wrong than to look up. Read API conventions for how money, quantities and pagination are typed, authentication for how a key is scoped to your firm, and events & streaming before you build on the stream.