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/api/p3/btc-returns
GETAvailable

Monthly / quarterly / yearly return matrix

Monthly / quarterly / yearly return matrix (BTC / ETH)

GET/api/p3/btc-returns

Request

Query parameters

NameTypeRequiredDefaultAllowed valuesDescription
coinstringOptionalBTCBTC, ETHCoin; BTC or ETH only, others treated as BTC. Example: BTC

Example request

curl -s "https://www.coinboss.com/api/p3/btc-returns?coin=BTC"

Response fields

The field table is generated from real responses, so it lists exactly what the endpoint returns. Paths use a[] for array items and {*} for objects keyed by a dynamic name such as a coin or an exchange.

FieldTypeUnitDescription
successboolean—true when the request succeeded. On failure the body is `{ success: false, code, error, request_id }`.
nownumbermsServer time when the response was built.
coinstring—Coin symbol, upper case (for example BTC).
matrixobject—Matrix keyed by row and column. dynamic keys: 2013,2014,2015,2016,2017,2018
matrix.{*}object—Matrix keyed by row and column. dynamic keys: 1,2,3,4,5,6
matrix.{*}.{*}number—Matrix keyed by row and column.
monthAvgobject—Mean monthly return of each calendar month across all years in `matrix`; keys are month numbers `1`–`12`. dynamic keys: 1,2,3,4,5,6
monthAvg.{*}number%Arithmetic mean of that calendar month's returns over all years with data; the key is the month number.
monthMedobject—Median monthly return of each calendar month across all years; keys are month numbers `1`–`12`. dynamic keys: 1,2,3,4,5,6
monthMed.{*}number%Median of that calendar month's returns over all years with data; the key is the month number.
qmatrixobject—Quarterly returns by year; keys are calendar years. dynamic keys: 2013,2014,2015,2016,2017,2018
qmatrix.{*}object—Returns of one year's quarters; keys are quarter numbers `1`–`4`, quarters without data are omitted. dynamic keys: 1,2,3,4
qmatrix.{*}.{*}number%Return of the quarter, compounded from the monthly returns available in that quarter (the current quarter is partial).
qAvgobject—Mean return of each quarter across all years; keys are quarter numbers `1`–`4`. dynamic keys: 1,2,3,4
qAvg.{*}number%Arithmetic mean of that quarter's returns over all years with data.
qMedobject—Median return of each quarter across all years; keys are quarter numbers `1`–`4`. dynamic keys: 1,2,3,4
qMed.{*}number%Median of that quarter's returns over all years with data.
yearlyobject—Yearly values. dynamic keys: 2013,2014,2015,2016,2017,2018
yearly.{*}number—Yearly values.
yearSrcobject—Origin of the monthly candles used for each year; keys are calendar years. dynamic keys: 2013,2014,2015,2016,2017,2018
yearSrc.{*}string—Source label of that year's monthly candles: `binance`, a third-party reference-price label for years before Binance listed the pair, or `mixed`.

Generated 2026-11-11 23:00 UTC from 1 real responses.

Example response

/api/p3/btc-returns?coin=BTC · Real response captured 2026-11-13 03:57:33 UTC. Long arrays and maps are shortened for display: qAvg had 4 items; qMed had 4 items; matrix had 14 items; yearly had 14 items; qmatrix had 14 items; yearSrc had 14 items.

  • {
    • "success": true,
    • "now": 1794542253311,
    • "coin": "BTC",
    • "matrix": {
      • "2013": { … 2 },
      • "2014": { … 2 }
      },
    • "monthAvg": {
      • "1": 3.3,
      • "2": 10.27
      },
    • "monthMed": {
      • "1": -1.09,
      • "2": 11.63
      },
    • "qmatrix": {
      • "2013": { … 2 },
      • "2014": { … 2 }
      },
    • "qAvg": {
      • "1": 47.83,
      • "2": 23.04
      },
    • "qMed": {
      • "1": -3,
      • "2": 9.21
      },
    • "yearly": {
      • "2013": 5372.48,
      • "2014": -57.38
      },
    • "yearSrc": {
      • "2013": "coinmetrics",
      • "2014": "coinmetrics"
      }
    }

Details

Authentication
None. Public endpoint.
Rate limit
1200 requests per minute per IP
Server cache
10m
Edge micro-cache
10s
Update frequency
every 6 hours (current month is updated in place)
Window
full monthly history
Data sources
Monthly, quarterly and yearly returns computed in-house from a public reference-rate dataset (early years) and exchange monthly klines.
Exchange coverage
BTC and ETH.
Sorting
year ascending
Units
percent
Method
Monthly return = (close - open) / open x 100; quarterly and yearly returns compound the monthly ones; averages and medians per calendar month/quarter.
Timestamps
Unix epoch milliseconds (UTC) unless the field description says otherwise
Response format
json
Stability
Stable

Live status

AvailableChecked 2026-11-13 03:57:33 UTCHTTP 2003 msSchema matches

Availability, last 30 days

100% of 411 checks passed

Errors

Failed calls share one shape on every endpoint. The full list is on the errors page. Errors and rate limits →

CodeHTTPMeaningWhat to do
INVALID_PARAM400A required parameter is missing or a value is not accepted. `param` names the parameter when it is known.Do not retry unchanged; fix the request.
UNAUTHORIZED401The `CB-API-KEY` header was sent but the key is unknown or revoked. Public data needs no key — drop the header or use a valid key.Do not retry unchanged.
FORBIDDEN403The route is not part of the public API (internal or account-only).Do not retry.
NOT_FOUND404Unknown route, or the requested coin / exchange / fund does not exist.Do not retry; check the path and identifiers against the catalog.
RATE_LIMITED429More requests than the per-minute limit. `Retry-After` gives the seconds to wait.Wait for `Retry-After`, then retry with backoff.
INTERNAL500Unexpected server error. The message is generic by design; quote `request_id` when reporting it.Retry once after a few seconds; report it with the request id if it persists.
UPSTREAM_FAILED503The data source behind this endpoint did not answer in time. No stale or substitute numbers are returned in its place.Retry with backoff; check the status page.
UNAVAILABLE501 / 503The dataset is temporarily not ready (cache warming) or the endpoint has no lawful public source yet.Retry later; the catalog marks endpoints that are unavailable by design.
REQUEST_FAILED200Some older endpoints answer HTTP 200 with `success: false`. Always check `success`, not only the HTTP status.Depends on the message; treat as a failed request.

Try it

GET/api/p3/btc-returnsAvailable
Parameters

string · default BTC — Coin; BTC or ETH only, others treated as BTC.

Request URLhttps://www.coinboss.com/api/p3/btc-returns?coin=BTC
Choose an endpoint and press “Send request”. The response, headers and timing will appear here.