---
title: "Open interest across vaults"
method: GET
path: "/v3/evk/vaults/open-interest"
tags: ["Vaults"]
---

# Open interest across vaults

`GET /v3/evk/vaults/open-interest`

Event-based aggregation of total borrows and borrower counts. Uses MV-backed query path (`open_interest_mv`) with safe fallback to raw aggregation when unavailable. Prices should be composed separately via /v3/prices.

## Query parameters

- `chainId` string, required
- `vault` string
- `offset` integer
- `limit` integer

## Response `200`

Open interest data

- object
  - `data` object[]
    - `vault` string
    - `asset` string
    - `totalBorrows` string
    - `borrowerCount` integer
    - `timestamp` string, date-time
  - `meta` PaginationMeta
    - `total` integer — Exact total count when the endpoint provides one.
    - `hasMore` boolean — Indicates whether another page exists beyond the current page.
    - `offset` integer
    - `limit` integer — Echoed page size after endpoint-side clamping.
    - `timestamp` string, date-time, required
    - `chainId` string — Comma-separated chain IDs for multi-chain responses.
    - `degradedProviders` string[] — Live providers whose data is incomplete in this response.

---

[API](https://skmtc.dev/euler/apis/euler-data-api-v3.md) · [All operations](https://skmtc.dev/euler/apis/euler-data-api-v3/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/euler/euler-data-api-v3/revisions/9573a5fbd4a6/schema)