> 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/pair-quotes.md).
# Pair quotes
Returns a stream of quotes for specified pairs.\
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":{"StreamingPair":{"description":"Comma separated list of asset pairs or patterns like `btc-*`, or `*-btc`.","in":"query","name":"pairs","required":true,"schema":{"type":"array","items":{"type":"string"}},"explode":false},"AggregationMethod":{"description":"The method to use for aggregation.","in":"query","name":"aggregation_method","required":false,"schema":{"type":"string","default":"aggregated_spread"}},"Backfill":{"description":"What data should be sent upon a connection.
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}}},"responses":{"UriTooLong":{"description":"Provided URI is too long. It must not be greater than 10000 symbols."},"StreamingAggregatedSpreadQuotes":{"description":"Aggregated spread quote WebSocket message.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/StreamingAggregatedSpreadQuote"}}}}},"schemas":{"StreamingAggregatedSpreadQuote":{"allOf":[{"$ref":"#/components/schemas/AggregatedSpreadQuote"},{"type":"object","properties":{"cm_sequence_id":{"$ref":"#/components/schemas/cmSequenceId"}},"required":["cm_sequence_id"]}]},"AggregatedSpreadQuote":{"description":"Information about aggregated spread quote.","properties":{"pair":{"$ref":"#/components/schemas/Pair"},"time":{"$ref":"#/components/schemas/Time"},"ask_price":{"$ref":"#/components/schemas/QuoteAskPrice"},"ask_size":{"$ref":"#/components/schemas/QuoteAskSize"},"bid_price":{"$ref":"#/components/schemas/QuoteBidPrice"},"bid_size":{"$ref":"#/components/schemas/QuoteBidSize"},"mid_price":{"$ref":"#/components/schemas/QuoteMidPrice"},"spread":{"$ref":"#/components/schemas/QuoteSpread"}},"type":"object","required":["pair","time"]},"Pair":{"description":"Pair string representation as `-`.","type":"string"},"Time":{"description":"The time in ISO 8601 date-time format. Always with nanoseconds precision.","type":"string","format":"date-time"},"QuoteAskPrice":{"description":"The limit price of the top ask on the order book. If no asks in the order book, the ask price is skipped.","type":"string","format":"decimal"},"QuoteAskSize":{"description":"The size of the top ask on the order book. If no asks in the order book, the ask size is skipped.","type":"string","format":"decimal"},"QuoteBidPrice":{"description":"The limit price of the top bid on the order book. If no bids in the order book, the bid price is skipped.","type":"string","format":"decimal"},"QuoteBidSize":{"description":"The size of the top bid on the order book. If no bids in the order book, the bid size is skipped.","type":"string","format":"decimal"},"QuoteMidPrice":{"description":"The average of the bid price and ask price.","type":"string","format":"decimal"},"QuoteSpread":{"description":"The difference between the bid price and ask price as a percentage of the mid price.","type":"string","format":"decimal"},"cmSequenceId":{"description":"The monotonically increasing message number, resets on disconnection.","type":"string"}}},"paths":{"/timeseries-stream/pair-quotes":{"get":{"summary":"Pair quotes","description":"Returns a stream of quotes for specified pairs.
If you are falling behind (slow client) you will get `warning` message first, then `error` message and disconnection will happen.","operationId":"getTimeseriesStreamPairQuotes","tags":["Timeseries stream"],"parameters":[{"$ref":"#/components/parameters/StreamingPair"},{"$ref":"#/components/parameters/AggregationMethod"},{"$ref":"#/components/parameters/Backfill"},{"$ref":"#/components/parameters/Pretty"}],"responses":{"414":{"$ref":"#/components/responses/UriTooLong"},"default":{"$ref":"#/components/responses/StreamingAggregatedSpreadQuotes"}}}}}}
```
---
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```
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