Introduction

Overview

The Angolin API serves OHLCV (open/high/low/close/volume) candle data for crypto markets — both raw, per-exchange candles and a cross-exchange aggregated series computed from them. It's a read-only HTTP API, authenticated with an API key, meant for anyone who wants clean, auditable market data without running their own exchange ingestion.

This documentation covers the public data API only: the key-gated GET /v1/exchange_ohlcv and GET /v1/aggregated_ohlcv, plus four public catalog endpoints — GET /v1/exchanges, GET /v1/assets, GET /v1/exchange_pairs, and GET /v1/aggregated_pairs — for discovering what data exists before you query it. It does not cover the endpoints the Angolin web app itself uses to manage your account or session.

Every timestamp, in requests and responses alike, is ISO 8601 (e.g. 2026-09-22T13:00:00Z) — see Endpoints for exactly where it's used.

Base URL

The API is live in production at:

Where to go next

• Quickstart — make your first authenticated request.
• OHLCV and Universe — full parameter and response reference for every endpoint.
• Methodology — exactly how per-exchange candles are combined into the aggregated series.
• Errors & rate limits — every error status code and what triggers it.