curl --request GET \
--url https://nexus.gerowallet.io/api/assets/detailedInfo \
--header 'X-Api-Key: <api-key>'import requests
url = "https://nexus.gerowallet.io/api/assets/detailedInfo"
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://nexus.gerowallet.io/api/assets/detailedInfo', 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://nexus.gerowallet.io/api/assets/detailedInfo",
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://nexus.gerowallet.io/api/assets/detailedInfo"
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://nexus.gerowallet.io/api/assets/detailedInfo")
.header("X-Api-Key", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://nexus.gerowallet.io/api/assets/detailedInfo")
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""{
"error": "Asset not found"
}{
"error": "Service Unavailable"
}Get metadata and supply for a Cardano native asset
Get the information of an asset including first minting, latest minting, holders count & token registry metadata. Supply comes from the first provider that answers; when that is yaci-store, which indexes no asset metadata, onchainMetadata, cip68Metadata, metadata, the mint and burn counts, creationTime and initialMintTxHash are filled from Koios on a best-effort basis. Fields can remain null when metadata is absent, Koios is unavailable, or the fill fails. For the metadata alone, decoded per asset and for up to 100 assets per call, use POST /api/assets/metadata; onchainMetadata and cip68Metadata here are JSON text, not objects.
curl --request GET \
--url https://nexus.gerowallet.io/api/assets/detailedInfo \
--header 'X-Api-Key: <api-key>'import requests
url = "https://nexus.gerowallet.io/api/assets/detailedInfo"
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://nexus.gerowallet.io/api/assets/detailedInfo', 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://nexus.gerowallet.io/api/assets/detailedInfo",
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://nexus.gerowallet.io/api/assets/detailedInfo"
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://nexus.gerowallet.io/api/assets/detailedInfo")
.header("X-Api-Key", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://nexus.gerowallet.io/api/assets/detailedInfo")
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""{
"error": "Asset not found"
}{
"error": "Service Unavailable"
}Authorizations
API key (programmatic access — recommended)
Send your API key in the X-Api-Key header. Keys start with nxs_ and are
created in the dashboard (or via POST /api/keys with a session JWT).
Each key is scoped to one chain and one network (for example
CARDANO_MAINNET), fixed at creation time. It cannot query a different network
on the same chain, and it cannot query a different chain at all. A mismatched
network parameter returns 400 Network Mismatch. Create one key per chain
and network under the same account.
This is the credential most integrations should use.
Query Parameters
Accepts either the value listed here (CARDANO_MAINNET) or its kebab-case alias (cardano-mainnet); matching is case-insensitive. Omit it and the network is taken from the API key. A value that disagrees with the key's own network returns 400 Network Mismatch.
CARDANO_MAINNET, CARDANO_PREPROD, CARDANO_PREVIEW, APEX_PRIME_MAINNET, APEX_VECTOR_MAINNET, APEX_VECTOR_TESTNET, MIDNIGHT_MAINNET, MIDNIGHT_PREPROD, MIDNIGHT_STAGENET, BITCOIN_MAINNET, BITCOIN_TESTNET4 1^[a-fA-F0-9]{1,64}$1^[a-fA-F0-9]{0,64}$Response
Asset Information retrieved
JSON text (a serialised object), not an object: the asset's minting-transaction metadata as the answering provider returns it, e.g. {"721": {...}}. Filled from Koios when the first provider (yaci-store) has no metadata, on a best-effort basis; can remain null when metadata is absent, Koios is unavailable, or the fill fails. Decoded per-asset form: POST /api/assets/metadata.
JSON text, not CBOR: {"": } of the CIP-68 reference datum, as Koios returns it. Filled from Koios when the first provider (yaci-store) has no metadata, on a best-effort basis; can remain null when metadata is absent, Koios is unavailable, or the fill fails. Decoded form: POST /api/assets/metadata.
Show child attributes
Show child attributes