curl --request GET \
--url https://api.webacy.com/rwa/hci/history \
--header 'x-api-key: <api-key>'import requests
url = "https://api.webacy.com/rwa/hci/history"
headers = {"x-api-key": "<api-key>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {'x-api-key': '<api-key>'}};
fetch('https://api.webacy.com/rwa/hci/history', 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://api.webacy.com/rwa/hci/history",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"x-api-key: <api-key>"
],
]);
$response = curl_exec($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://api.webacy.com/rwa/hci/history"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("x-api-key", "<api-key>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.webacy.com/rwa/hci/history")
.header("x-api-key", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.webacy.com/rwa/hci/history")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["x-api-key"] = '<api-key>'
response = http.request(request)
puts response.read_body{
"token": {
"chain": "eth",
"address": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
"symbol": "usdc",
"name": "USD Coin"
},
"days": 2,
"points": [
{
"date": "2026-09-28",
"generatedAt": "2026-09-28T03:31:48.876925Z",
"top10Index": 0.0974,
"top10TopPct": 9.74,
"top10RawTopPct": null,
"top10Source": null,
"top10RiskBand": "low",
"top30Index": 0.0974,
"holderCount": 8955027,
"methodologyVersion": 1
},
{
"date": "2026-09-29",
"generatedAt": "2026-09-29T03:32:16.173899Z",
"top10Index": 0.0972,
"top10TopPct": 9.72,
"top10RawTopPct": null,
"top10Source": null,
"top10RiskBand": "low",
"top30Index": 0.0972,
"holderCount": 8956887,
"methodologyVersion": 1
},
{
"date": "2026-09-30",
"generatedAt": "2026-09-30T04:15:49.754747Z",
"top10Index": 0.1443,
"top10TopPct": 14.43,
"top10RawTopPct": null,
"top10Source": null,
"top10RiskBand": "low",
"top30Index": 0.1714,
"holderCount": 8961918,
"methodologyVersion": 2
}
],
"meta": {
"snapshotsScanned": 3,
"pointsFound": 3,
"from": "2026-09-28",
"to": "2026-09-30",
"methodologyBreaks": [
"2026-09-30"
],
"methodologyVersions": [
{
"version": 1,
"from": "2026-03-31"
},
{
"version": 2,
"from": "2026-09-30"
}
]
}
}{
"message": "Unauthorized"
}{
"x402Version": 1,
"error": "payment required"
}Get holder concentration history for one token
Daily time series of top-10/top-30 holder concentration for one token, assembled from the daily HCI snapshots (accruing since 2026-03-31). Points are sparse: dates with no snapshot are absent.
Methodology versions. On 2026-09-30 the holder-concentration computation changed (top holders are now fetched explicitly and the top-30 cohort is built from 30 holders; before that, the organic top-10 was computed from at most 10 fetched holders and top-30 repeated it). Values are only comparable within one methodologyVersion: split a chart at each date in meta.methodologyBreaks instead of reading the step as a market move. meta.methodologyVersions lists every version with the date it took effect. Earlier snapshots cannot be recomputed.
curl --request GET \
--url https://api.webacy.com/rwa/hci/history \
--header 'x-api-key: <api-key>'import requests
url = "https://api.webacy.com/rwa/hci/history"
headers = {"x-api-key": "<api-key>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {'x-api-key': '<api-key>'}};
fetch('https://api.webacy.com/rwa/hci/history', 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://api.webacy.com/rwa/hci/history",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"x-api-key: <api-key>"
],
]);
$response = curl_exec($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://api.webacy.com/rwa/hci/history"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("x-api-key", "<api-key>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.webacy.com/rwa/hci/history")
.header("x-api-key", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.webacy.com/rwa/hci/history")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["x-api-key"] = '<api-key>'
response = http.request(request)
puts response.read_body{
"token": {
"chain": "eth",
"address": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
"symbol": "usdc",
"name": "USD Coin"
},
"days": 2,
"points": [
{
"date": "2026-09-28",
"generatedAt": "2026-09-28T03:31:48.876925Z",
"top10Index": 0.0974,
"top10TopPct": 9.74,
"top10RawTopPct": null,
"top10Source": null,
"top10RiskBand": "low",
"top30Index": 0.0974,
"holderCount": 8955027,
"methodologyVersion": 1
},
{
"date": "2026-09-29",
"generatedAt": "2026-09-29T03:32:16.173899Z",
"top10Index": 0.0972,
"top10TopPct": 9.72,
"top10RawTopPct": null,
"top10Source": null,
"top10RiskBand": "low",
"top30Index": 0.0972,
"holderCount": 8956887,
"methodologyVersion": 1
},
{
"date": "2026-09-30",
"generatedAt": "2026-09-30T04:15:49.754747Z",
"top10Index": 0.1443,
"top10TopPct": 14.43,
"top10RawTopPct": null,
"top10Source": null,
"top10RiskBand": "low",
"top30Index": 0.1714,
"holderCount": 8961918,
"methodologyVersion": 2
}
],
"meta": {
"snapshotsScanned": 3,
"pointsFound": 3,
"from": "2026-09-28",
"to": "2026-09-30",
"methodologyBreaks": [
"2026-09-30"
],
"methodologyVersions": [
{
"version": 1,
"from": "2026-03-31"
},
{
"version": 2,
"from": "2026-09-30"
}
]
}
}{
"message": "Unauthorized"
}{
"x402Version": 1,
"error": "payment required"
}Authorizations
Query Parameters
Token address. EVM addresses match in any casing; Solana addresses are case-sensitive.
Chain slug (e.g. eth, bsc, sol). When omitted, the first chain the address appears on is used for the whole series.
Lookback window in days (default 90, max 180).
1 <= x <= 180