---
title: "Open Interest"
method: GET
path: "/derivatives/open-interest/{symbol}"
tags: ["derivatives"]
---

# Open Interest

`GET /derivatives/open-interest/{symbol}`

## Request

- Base URL: `https://mcp.f1ow.com/v1`
- URL: `https://mcp.f1ow.com/v1/derivatives/open-interest/{symbol}`
- Auth: one of:
  - HTTP bearer
  - none

Current market-wide (cross-exchange aggregate) open interest (USD) for one coin's perpetuals, with its 24h and 7d change, the 24h price change, AND the underlying 4h-bucket series. Read OI against price: price up on rising OI is new money opening positions, price up on falling OI is short covering — opposite trades off the same price move. The series makes that read available bucket by bucket instead of once per day (pair it with market_candles at 4h for the price leg), and carries the window's own low/high so the current level can be judged against where it has actually been. A 1y line ranks the level and today's 24h change against a year of daily closes (percentile, range with dates); the change rank is the better read, since the USD level mostly tracks price. Falls back to a single-venue figure if the aggregate source is offline. Set 'points' to trim the series (omit for the full ~10-day window; 0 to suppress it).

## Path parameters

- `symbol` string, required: Coin symbol, e.g. "BTC".

## Query parameters

- `points` integer: How many of the newest 4h buckets to emit. Omit for the full window (60 points ~ 10 days); 0 suppresses the series and returns the summary only.

## Response `200`

The result.

- object
  - `text` string, required: Human-readable rendering of the result.
  - `meta` ResponseMeta
    - `generatedAt` string, date-time: When the data was produced (source timestamp where the provider has one), ISO 8601 UTC

## Other responses

- `400`: An argument is missing or invalid.
- `401`: No credential was sent.
- `402`: x402 route: a priced call without a valid payment (challenge in the base64 PAYMENT-REQUIRED header). Metered routes: the account balance or access period is spent.
- `403`: The credential was rejected.
- `500`: Unexpected server error.
- `502`: The data source could not answer.

---

[API](https://skmtc.dev/f1ow/apis/f1ow-api.md) · [All operations](https://skmtc.dev/f1ow/apis/f1ow-api/llms.txt) · [OpenAPI document](https://skmtc.dev/f1ow/apis/f1ow-api/revisions/6974f25b6067?raw)