> 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-rest/mempool-feerates-deprecated.md).

# Mempool feerates (deprecated)

Returns mempool feerates for the specified assets.\
This endpoint is useful for those who want to explore the history of the feerate distribution and potentially select the time period with the lowest commissions.\
Results are ordered by `(asset, time)`.\
To fetch the next page of results use the `next_page_url` JSON response field.

```json
{"openapi":"3.0.2","info":{"title":"Coin Metrics API v4","version":"4.0.0"},"tags":[{"name":"Timeseries REST","description":"Endpoints for fetching metrics, market data, indexes and other time series data.\n\n**Endpoints on this page:**\n- `GET /timeseries/asset-alerts` — Asset alerts (deprecated)\n- `GET /timeseries/asset-chains` — Asset chains (experimental)\n- `GET /timeseries/asset-metrics` — Asset metrics\n- `GET /timeseries/defi-balance-sheets` — DeFi balance sheets (experimental)\n- `GET /timeseries/exchange-asset-metrics` — Exchange-asset metrics\n- `GET /timeseries/exchange-metrics` — Exchange metrics\n- `GET /timeseries/exchange-pair-metrics` — Exchange-pair metrics\n- `GET /timeseries/index-candles` — Index candles\n- `GET /timeseries/index-constituents` — Index constituents\n- `GET /timeseries/index-levels` — Index levels\n- `GET /timeseries/institution-metrics` — Institution metrics\n- `GET /timeseries/market-candles` — Market candles\n- `GET /timeseries/market-contract-prices` — Market contract prices\n- `GET /timeseries/market-funding-rates` — Market funding rates\n- `GET /timeseries/market-funding-rates-predicted` — Predicted Market funding rates\n- `GET /timeseries/market-greeks` — Market greeks\n- `GET /timeseries/market-implied-volatility` — Market implied volatility\n- `GET /timeseries/market-liquidations` — Market liquidations\n- `GET /timeseries/market-metrics` — Market metrics\n- `GET /timeseries/market-openinterest` — Market open interest\n- `GET /timeseries/market-orderbooks` — Market orderbooks\n- `GET /timeseries/market-quotes` — Market quotes\n- `GET /timeseries/market-trades` — Market trades\n- `GET /timeseries/mempool-feerates` — Mempool feerates (deprecated)\n- `GET /timeseries/mining-pool-tips-summary` — Mining pool tips summary (experimental)\n- `GET /timeseries/pair-candles` — Pair candles\n- `GET /timeseries/pair-metrics` — Pair metrics\n- `GET /timeseries/protocol-metrics` — Protocol metrics"}],"servers":[{"url":"https://api.coinmetrics.io/v4"},{"url":"wss://api.coinmetrics.io/v4"},{"url":"https://community-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},"StartTime":{"description":"Start of the time interval.<br/> This field refers to the `time` field in the response.<br/> Multiple formats of ISO 8601 are supported: `2006-01-20T00:00:00Z`, `2006-01-20T00:00:00.000Z`, `2006-01-20T00:00:00.123456Z`, `2006-01-20T00:00:00.123456789Z`, `2006-01-20`, `20060120`.<br/> Inclusive by default.<br/> UTC timezone by default. `Z` suffix is optional and `timezone` parameter has a priority over it.<br/> If `start_time` is omitted, response will include time series from the **earliest** time available.","in":"query","name":"start_time","schema":{"type":"string"}},"EndTime":{"description":"End of the time interval.<br/> This field refers to the `time` field in the response.<br/> Multiple formats of ISO 8601 are supported: `2006-01-20T00:00:00Z`, `2006-01-20T00:00:00.000Z`, `2006-01-20T00:00:00.123456Z`, `2006-01-20T00:00:00.123456789Z`, `2006-01-20`, `20060120`.<br/> Inclusive by default.<br/> UTC timezone by default. `Z` suffix is optional and `timezone` parameter has a priority over it.<br/> If `end_time` is omitted, response will include time series up to the **latest** time available.","in":"query","name":"end_time","schema":{"type":"string"}},"StartInclusive":{"description":"Inclusive or exclusive corresponding `start_*` parameters.","in":"query","name":"start_inclusive","schema":{"default":true,"type":"boolean"}},"EndInclusive":{"description":"Inclusive or exclusive corresponding `end_*` parameters.","in":"query","name":"end_inclusive","schema":{"default":true,"type":"boolean"}},"Timezone":{"description":"Timezone name for `start_time` and `end_time` timestamps.<br/> This parameter does not modify the output times, which are always `UTC`.<br/> Format is defined by [TZ database](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).","in":"query","name":"timezone","schema":{"default":"UTC","type":"string"}},"MempoolFeeratesPageSize":{"description":"Number of mempool feerate snapshots per single page of results.","in":"query","name":"page_size","schema":{"default":10,"type":"integer","format":"int32","minimum":1,"maximum":200}},"PagingFrom":{"description":"Where does the first page start, at the start of the interval or at the end.<br/> The value of this parameter is ignored if the endpoint supports the `format` parameter and its value is set to `json_stream`.","in":"query","name":"paging_from","schema":{"default":"end","enum":["start","end"],"type":"string","format":"PagingFrom"}},"Pretty":{"description":"Human-readable formatting of JSON responses.","in":"query","name":"pretty","schema":{"type":"boolean","default":false}},"Format":{"description":"Format of the response.","in":"query","name":"format","schema":{"enum":["json","csv"],"type":"string","default":"json"}},"NextPageToken":{"description":"Token for receiving the results from the next page of a query.<br/> Should not be used directly. To iterate through pages just use `next_page_url` response field.","in":"query","name":"next_page_token","schema":{"type":"string"}}},"responses":{"MempoolFeerates":{"description":"Mempool feerates.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/MempoolFeeratesResponse"}}}},"AssetNotFound":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}},"description":"Asset not found."},"Unauthorized":{"description":"Requested resource requires authorization.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"BlockchainForbidden":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}},"description":"Requested resource is not available with supplied credentials."},"UriTooLong":{"description":"Provided URI is too long. It must not be greater than 10000 symbols."}},"schemas":{"MempoolFeeratesResponse":{"description":"Mempool feerates response.","properties":{"data":{"$ref":"#/components/schemas/MempoolFeerates"},"next_page_token":{"$ref":"#/components/schemas/NextPageToken"},"next_page_url":{"$ref":"#/components/schemas/NextPageUrl"}},"required":["data"],"type":"object"},"MempoolFeerates":{"type":"array","items":{"$ref":"#/components/schemas/MempoolFeerate"}},"MempoolFeerate":{"properties":{"asset":{"$ref":"#/components/schemas/Asset"},"time":{"$ref":"#/components/schemas/Time"},"feerates":{"$ref":"#/components/schemas/MempoolFeerateBands"}},"required":["asset","time","feerates"]},"Asset":{"description":"Name of the asset.","type":"string"},"Time":{"description":"The time in ISO 8601 date-time format. Always with nanoseconds precision.","type":"string","format":"date-time"},"MempoolFeerateBands":{"type":"array","items":{"$ref":"#/components/schemas/MempoolFeerateBand"}},"MempoolFeerateBand":{"properties":{"feerate":{"$ref":"#/components/schemas/MempoolFeerateBandFeerate"},"count":{"$ref":"#/components/schemas/MempoolFeerateBandCount"},"consensus_size":{"$ref":"#/components/schemas/MempoolFeerateBandConsensusSize"},"physical_size":{"$ref":"#/components/schemas/MempoolFeerateBandPhysicalSize"},"fees":{"$ref":"#/components/schemas/MempoolFeerateBandFees"}},"required":["feerate","count","consensus_size","fees"]},"MempoolFeerateBandFeerate":{"description":"Rounded feerate value used to aggregate the transactions into the current mempool feerate band. Unit is sat/vB.","type":"string","format":"decimal"},"MempoolFeerateBandCount":{"description":"Amount of transactions included into the current mempool feerate band.","type":"string","format":"int64"},"MempoolFeerateBandConsensusSize":{"description":"Consensus sizes summed up for all the transactions included into the current mempool feerate band. vSizes sum can be derived as 'vSize = consensusSize / 4'.","type":"string","format":"decimal"},"MempoolFeerateBandPhysicalSize":{"description":"Physical sizes summed up for all the transactions included into the current mempool feerate band.","type":"string","format":"decimal"},"MempoolFeerateBandFees":{"description":"Fees summed up for all the transactions included into the current mempool feerate band. Unit is BTC.","type":"string","format":"decimal"},"NextPageToken":{"description":"Token of the next page results for a given request.","type":"string"},"NextPageUrl":{"description":"URL of the next page results for a given request.","type":"string"},"ErrorResponse":{"properties":{"error":{"$ref":"#/components/schemas/ErrorObject"}},"required":["error"],"type":"object"},"ErrorObject":{"properties":{"type":{"description":"Error type string. Can be used for error identification.","type":"string"},"message":{"description":"Human-friendly error description. Can be amended without prior notification. Do not use for error identification in your code.","type":"string"}},"required":["type","description"],"type":"object"}}},"paths":{"/timeseries/mempool-feerates":{"get":{"summary":"Mempool feerates (deprecated)","description":"Returns mempool feerates for the specified assets.<br/> This endpoint is useful for those who want to explore the history of the feerate distribution and potentially select the time period with the lowest commissions.<br/> Results are ordered by `(asset, time)`.<br/> To fetch the next page of results use the `next_page_url` JSON response field.","operationId":"getMempoolFeerates","tags":["Timeseries REST"],"parameters":[{"$ref":"#/components/parameters/AssetId"},{"$ref":"#/components/parameters/StartTime"},{"$ref":"#/components/parameters/EndTime"},{"$ref":"#/components/parameters/StartInclusive"},{"$ref":"#/components/parameters/EndInclusive"},{"$ref":"#/components/parameters/Timezone"},{"$ref":"#/components/parameters/MempoolFeeratesPageSize"},{"$ref":"#/components/parameters/PagingFrom"},{"$ref":"#/components/parameters/Pretty"},{"$ref":"#/components/parameters/Format"},{"$ref":"#/components/parameters/NextPageToken"}],"responses":{"200":{"$ref":"#/components/responses/MempoolFeerates"},"400":{"$ref":"#/components/responses/AssetNotFound"},"401":{"$ref":"#/components/responses/Unauthorized"},"403":{"$ref":"#/components/responses/BlockchainForbidden"},"414":{"$ref":"#/components/responses/UriTooLong"}}}}}}
```


---

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