---
title: "Index levels"
method: GET
path: "/timeseries-stream/index-levels"
tags: ["Timeseries stream"]
---

# Index levels

`GET /timeseries-stream/index-levels`

## Request

- Base URL: `wss://api.coinmetrics.io/v4`
- URL: `wss://api.coinmetrics.io/v4/timeseries-stream/index-levels`
- Auth: API key in query parameter `api_key`
- TypeScript: <https://skmtc.dev/coinmetrics/apis/coin-metrics-api-v4/docs/timeseries-stream/index-levels/get.ts> (a function with typed inputs; its response is checked against the schema)

Returns a stream of levels for specified indexes.<br/> If you are falling behind (slow client) you will get `warning` message first, then `error` message and disconnect will happen.

## Query parameters

- `indexes` string[], required
- `include_verification` boolean
- `backfill` 'latest' | 'none'
- `pretty` boolean

## Response `200`

Index levels WebSocket message.

- StreamingIndexLevel: Information about index level.
  - `index` string, required: Name of the index.
  - `time` string, required: The time in ISO 8601 date-time format. Always with nanoseconds precision.
  - `level` string, required: The value of the index.
  - `verification` Verification: Information about verification.
    - `timestamp` string: The verification time of the index.
    - `level` string: The verification value of the index.
    - `signature` string, required: The signature information.
  - `cm_sequence_id` string, required: The monotonically increasing message number, resets on disconnection.

## Other responses

- `401`: Requested resource requires authorization.
- `403`: Requested resource is not available with supplied credentials.
- `414`: Provided URI is too long. It must not be greater than 10000 symbols.

---

[API](https://skmtc.dev/coinmetrics/apis/coin-metrics-api-v4.md) - [All operations](https://skmtc.dev/coinmetrics/apis/coin-metrics-api-v4/llms.txt) - [OpenAPI document](https://skmtc.dev/coinmetrics/apis/coin-metrics-api-v4/revisions/774268c0a4fe?raw)