curl --request GET \
--url https://flow-api.skylit.ai/v1/contract/{symbol}/rvol \
--header 'Authorization: Bearer <token>'import requests
url = "https://flow-api.skylit.ai/v1/contract/{symbol}/rvol"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://flow-api.skylit.ai/v1/contract/{symbol}/rvol', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://flow-api.skylit.ai/v1/contract/{symbol}/rvol",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://flow-api.skylit.ai/v1/contract/{symbol}/rvol"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://flow-api.skylit.ai/v1/contract/{symbol}/rvol")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://flow-api.skylit.ai/v1/contract/{symbol}/rvol")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"data": {
"bars": [
{
"timestamp": "<string>",
"timestampEnd": "<string>",
"volume": 1,
"premium": 123,
"avgVolume": 123,
"avgPremium": 123,
"avgDaysCount": 123
}
],
"stats": {
"todayVolume": 1,
"todayPremium": 123,
"avgVolume": 123,
"avgPremium": 123,
"rvolVolume": 123,
"rvolPremium": 123,
"avgDaysCount": 1
}
},
"meta": {
"timestamp": "2023-11-07T05:31:56Z",
"requestId": "d7574836"
}
}{
"error": {
"code": "BAD_REQUEST",
"message": "Invalid parameter 'timeframe': must be one of [1m, 5m, 15m, 1h, 4h, 1d, 1w, 1M]"
}
}{
"error": {
"code": "UNAUTHORIZED",
"message": "Authentication required"
}
}{
"error": {
"code": "insufficient_credits",
"message": "Out of credits. Top up to continue making requests."
}
}{
"error": {
"code": "RATE_LIMITED",
"message": "Rate limit of 100 req/min exceeded. Retry after 18s."
}
}Relative-volume bars for a contract
Same shape as /v1/underlying/{ticker}/rvol but scoped to a
single contract.
curl --request GET \
--url https://flow-api.skylit.ai/v1/contract/{symbol}/rvol \
--header 'Authorization: Bearer <token>'import requests
url = "https://flow-api.skylit.ai/v1/contract/{symbol}/rvol"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://flow-api.skylit.ai/v1/contract/{symbol}/rvol', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://flow-api.skylit.ai/v1/contract/{symbol}/rvol",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://flow-api.skylit.ai/v1/contract/{symbol}/rvol"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://flow-api.skylit.ai/v1/contract/{symbol}/rvol")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://flow-api.skylit.ai/v1/contract/{symbol}/rvol")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"data": {
"bars": [
{
"timestamp": "<string>",
"timestampEnd": "<string>",
"volume": 1,
"premium": 123,
"avgVolume": 123,
"avgPremium": 123,
"avgDaysCount": 123
}
],
"stats": {
"todayVolume": 1,
"todayPremium": 123,
"avgVolume": 123,
"avgPremium": 123,
"rvolVolume": 123,
"rvolPremium": 123,
"avgDaysCount": 1
}
},
"meta": {
"timestamp": "2023-11-07T05:31:56Z",
"requestId": "d7574836"
}
}{
"error": {
"code": "BAD_REQUEST",
"message": "Invalid parameter 'timeframe': must be one of [1m, 5m, 15m, 1h, 4h, 1d, 1w, 1M]"
}
}{
"error": {
"code": "UNAUTHORIZED",
"message": "Authentication required"
}
}{
"error": {
"code": "insufficient_credits",
"message": "Out of credits. Top up to continue making requests."
}
}{
"error": {
"code": "RATE_LIMITED",
"message": "Rate limit of 100 req/min exceeded. Retry after 18s."
}
}Authorizations
Skylit API key in the Authorization header
(Authorization: Bearer fs_live_<key>). X-API-Key is also accepted.
Path Parameters
OPRA option symbol in URL-safe form:
{ticker}__{YYMMDD}{C|P}{strike×1000, 8 digits} — the ticker and the
15-character contract block are joined by a double underscore
(__). For example, an AAPL $250 call expiring 2026-01-17 is
AAPL__260117C00250000. (A space-padded 21-char OCC form such as
AAPL 260117C00250000 is also accepted on some endpoints, but the
__ form is canonical and works across all contract routes.)
"SPY__250516C00580000"
Query Parameters
Trailing window — {N}D where N is 1–365.
"1D"
1min, 5min, 10min, 15min, 30min, 1d, 1w Baseline lookback as {N}d (e.g. 14d). Max 365 days.
Trading date the request targets, in YYYY-MM-DD. Defaults to the
current trading date (the most recent session that has settled
enough data to be queryable).
"2026-05-27"
rvol, volume, premium, time Sort direction. Defaults to asc when order_by=time, otherwise desc.
asc, desc x >= 1full, summary Was this page helpful?

