Exchange API

Overview

Meaning and scope

An exchange API provides programmatic access to market data, balances, orders, trades, deposits, withdrawals, and account functions offered by an exchange. Exchange API returning an accepted or successful response proves only the documented API state; payment, payout, refund, settlement, or ledger completion may require later verification.

Mechanism and operation

An exchange API lets software interact with a trading venue or asset-conversion service without using its graphical interface. Order types, precision, fees, symbols, rate limits, finality, and withdrawal rules must be read from the specific provider contract. High-value systems should design for provider outage and ambiguous responses. Data handled by Exchange API should use documented types, units, timestamp rules, nullable fields, and enum behavior to prevent silent interpretation errors. Clients should use scoped keys, IP restrictions where available, encrypted secret storage, request signing, idempotent transfer references, and clock synchronization. Reconciliation must compare local intent with fills, fees, balances, and withdrawals.

Practical payment example

A treasury service requests a conversion quote from an exchange API. The job records the quote’s asset pair, timestamp and execution result; receiving a quoted price is not proof of a completed trade.

Operational checks

Public methods commonly expose markets and prices, while authenticated methods can manage accounts, orders, transfers, and transaction history. The Exchange API owner should publish stable error semantics and guidance on whether correction, retry, status lookup, or escalation is appropriate. Changes to Exchange API should be checked against older clients, stored payloads, enum growth, default behavior, and retry assumptions.

Distinctions and limits

A successful order submission means acceptance, not necessarily execution at the expected price. A successful transport result from Exchange API should not be interpreted beyond the exact API state documented by the provider.

Related reading

Related definitions: request signing, Reconciliation.