> For the complete documentation index, see [llms.txt](https://gitbook-docs.coinmetrics.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-docs.coinmetrics.io/cm-api-spec/timeseries/timeseries-stream/asset-metrics.md).

# Asset metrics

Returns a WebSocket stream of metrics for specified assets.\
Endpoint supports only block by block (`1b` frequency), per second (`1s` frequency), and sub-second (`200ms` frequency) metrics.\
Different sets of metrics may come in different messages.\
If you are falling behind (slow client) you will get `warning` message first, then `error` message and disconnection will happen.

```json
{"openapi":"3.0.2","info":{"title":"Coin Metrics API v4","version":"4.0.0"},"tags":[{"name":"Timeseries stream","description":"WebSocket endpoints for getting a real-time stream of metrics, market data, indexes and other time series data.\n\n**Endpoints on this page:**\n- `GET /timeseries-stream/asset-metrics` — Asset metrics\n- `GET /timeseries-stream/asset-quotes` — Asset quotes\n- `GET /timeseries-stream/index-levels` — Index levels\n- `GET /timeseries-stream/market-candles` — Market candles\n- `GET /timeseries-stream/market-contract-prices` — Market contract prices\n- `GET /timeseries-stream/market-liquidations` — Market liquidations\n- `GET /timeseries-stream/market-openinterest` — Market open interest\n- `GET /timeseries-stream/market-orderbooks` — Market orderbooks\n- `GET /timeseries-stream/market-quotes` — Market quotes\n- `GET /timeseries-stream/market-trades` — Market trades\n- `GET /timeseries-stream/pair-quotes` — Pair quotes"}],"servers":[{"url":"wss://api.coinmetrics.io/v4"}],"security":[{"api_key":[]}],"components":{"securitySchemes":{"api_key":{"description":"Coin Metrics API key can be specified as `?api_key=` query parameter.","in":"query","name":"api_key","type":"apiKey"}},"parameters":{"AssetId":{"description":"Comma separated list of assets.<br/> Use a corresponding `/catalog-all-v2/asset-{dataType}` endpoint for the full list of supported assets for a given data type.","in":"query","name":"assets","required":true,"schema":{"type":"array","items":{"type":"string"}},"explode":false},"AssetMetrics":{"description":"Comma separated metrics to request time series data for.<br/> Information on all available metrics can be found on page https://coverage.coinmetrics.io/asset-metrics-v2.<br/> Use the [/catalog-all-v2/asset-metrics](#operation/getCatalogAllV2AssetMetrics) endpoint for the full list of supported metrics per asset.","in":"query","name":"metrics","required":true,"schema":{"type":"array","items":{"type":"string"}},"explode":false},"StreamAssetMetricsFrequency":{"description":"Frequency of the metrics. Supported values are `1b` (block by block), `1s`, `200ms`.","in":"query","name":"frequency","schema":{"default":"1b","type":"string"}},"Backfill":{"description":"What data should be sent upon a connection.<br/> By default the latest values are sent just before real-time data.","in":"query","name":"backfill","schema":{"type":"string","default":"latest","enum":["latest","none"]}},"Pretty":{"description":"Human-readable formatting of JSON responses.","in":"query","name":"pretty","schema":{"type":"boolean","default":false}},"IgnoreUnsupportedErrors":{"description":"Ignore \"unsupported\" errors for not currently supported by Coin Metrics items.","in":"query","name":"ignore_unsupported_errors","schema":{"type":"boolean","default":false}},"IgnoreForbiddenErrors":{"description":"Ignore \"forbidden\" errors for the items you currently don't have access to.","in":"query","name":"ignore_forbidden_errors","schema":{"type":"boolean","default":false}}},"responses":{"UriTooLong":{"description":"Provided URI is too long. It must not be greater than 10000 symbols."},"StreamingAssetMetrics":{"description":"Asset metrics WebSocket message.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/StreamingAssetMetric"}}}}},"schemas":{"StreamingAssetMetric":{"description":"Metric values.","properties":{"asset":{"$ref":"#/components/schemas/Asset"},"time":{"$ref":"#/components/schemas/Time"},"cm_sequence_id":{"$ref":"#/components/schemas/cmSequenceId"}},"required":["asset","time","cm_sequence_id"],"additionalProperties":{"nullable":true,"description":"Metric value.","type":"string"},"type":"object"},"Asset":{"description":"Name of the asset.","type":"string"},"Time":{"description":"The time in ISO 8601 date-time format. Always with nanoseconds precision.","type":"string","format":"date-time"},"cmSequenceId":{"description":"The monotonically increasing message number, resets on disconnection.","type":"string"}}},"paths":{"/timeseries-stream/asset-metrics":{"get":{"summary":"Asset metrics","description":"Returns a WebSocket stream of metrics for specified assets.<br/> Endpoint supports only block by block (`1b` frequency), per second (`1s` frequency), and sub-second (`200ms` frequency) metrics.<br/> Different sets of metrics may come in different messages.<br/> If you are falling behind (slow client) you will get `warning` message first, then `error` message and disconnection will happen.","operationId":"getTimeseriesStreamAssetMetrics","tags":["Timeseries stream"],"parameters":[{"$ref":"#/components/parameters/AssetId"},{"$ref":"#/components/parameters/AssetMetrics"},{"$ref":"#/components/parameters/StreamAssetMetricsFrequency"},{"$ref":"#/components/parameters/Backfill"},{"$ref":"#/components/parameters/Pretty"},{"$ref":"#/components/parameters/IgnoreUnsupportedErrors"},{"$ref":"#/components/parameters/IgnoreForbiddenErrors"}],"responses":{"414":{"$ref":"#/components/responses/UriTooLong"},"default":{"$ref":"#/components/responses/StreamingAssetMetrics"}}}}}}
```


---

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```
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