---
title: WGO Data API
description: Daily BTC and ETH US spot ETF flows and on-chain fundamentals for capital-flow monitoring.
---

# WGO Data API

WGO provides daily BTC and ETH data for two focused questions:

1. Is ETF capital flowing in or out now, and has that direction persisted?
2. Is the cumulative long-term-capital proxy increasing or decreasing?

It also exposes daily on-chain fundamentals for the same assets. The API is designed
for daily reports and historical comparisons, not intraday trading or derivatives signals.

## Coverage

| Dataset | Assets | Granularity |
| --- | --- | --- |
| US spot ETF aggregate | BTC, ETH | Asset × US trading day |
| US spot ETF funds | BTC, ETH | Fund ticker × US trading day |
| On-chain fundamentals | BTC, ETH | Asset × UTC day |

ETF data is not tick-level data. The finest available ETF flow record is one fund
ticker for one trading day.

## API base

```text
https://api.mobiusquant.ai/api/wgo/v1
```

All `/v1/` endpoints require a MobiusQuant Bearer token authorized for `wgo:read`.

## Endpoints

| Method and path | Purpose |
| --- | --- |
| `GET /etf/{symbol}/overview` | Latest direction, streak, period flow, and long-term-capital proxy |
| `GET /etf/{symbol}/daily` | Historical daily aggregate ETF flow |
| `GET /etf/{symbol}/funds` | Per-fund breakdown for one trading day |
| `GET /assets/{asset}/onchain` | Historical daily on-chain fundamentals |

`symbol` and `asset` currently accept only `BTC` or `ETH`.

## Documentation

- [Quick start](/wgo/quickstart)
- [ETF endpoints](/wgo/etf)
- [On-chain endpoint](/wgo/onchain)
- [Data semantics and freshness](/wgo/data-semantics)
- [Authentication, limits, and errors](/wgo/authentication)
- [Interactive Swagger](https://api.mobiusquant.ai/api/wgo/docs)
- [Documentation snapshot of OpenAPI](/wgo/openapi.json)
- [Product `llms.txt`](/wgo/llms.txt)

::: warning Research data, not execution data
The service reports daily observations and derived summaries. Do not treat it as a
real-time market feed, order-flow feed, or identification of actual investor types.
:::