curl --request GET \
--url https://api.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id} \
--header 'Authorization: Bearer <token>' \
--header 'X-Namespace: <api-key>'import requests
url = "https://api.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}"
headers = {
"Authorization": "Bearer <token>",
"X-Namespace": "<api-key>"
}
response = requests.get(url, headers=headers)
print(response.text)const options = {
method: 'GET',
headers: {Authorization: 'Bearer <token>', 'X-Namespace': '<api-key>'}
};
fetch('https://api.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}', 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.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}",
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>",
"X-Namespace: <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.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("X-Namespace", "<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.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}")
.header("Authorization", "Bearer <token>")
.header("X-Namespace", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
request["X-Namespace"] = '<api-key>'
response = http.request(request)
puts response.read_body{
"user_id": "<string>",
"context_level": "<string>",
"interaction_count": 123,
"personal_weights": {},
"global_weights": {},
"alpha_beta": {},
"source": "<string>",
"warning": "<string>",
"hint": "<string>"
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}{
"detail": [
{
"loc": [
"<string>"
],
"msg": "<string>",
"type": "<string>",
"input": "<unknown>",
"ctx": {}
}
]
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}Get User Weights
Get per-user learned fusion weights for a retriever.
curl --request GET \
--url https://api.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id} \
--header 'Authorization: Bearer <token>' \
--header 'X-Namespace: <api-key>'import requests
url = "https://api.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}"
headers = {
"Authorization": "Bearer <token>",
"X-Namespace": "<api-key>"
}
response = requests.get(url, headers=headers)
print(response.text)const options = {
method: 'GET',
headers: {Authorization: 'Bearer <token>', 'X-Namespace': '<api-key>'}
};
fetch('https://api.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}', 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.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}",
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>",
"X-Namespace: <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.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("X-Namespace", "<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.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}")
.header("Authorization", "Bearer <token>")
.header("X-Namespace", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.mixpeek.com/v1/retrievers/{retriever_id}/learned-fusion/weights/{user_id}")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
request["X-Namespace"] = '<api-key>'
response = http.request(request)
puts response.read_body{
"user_id": "<string>",
"context_level": "<string>",
"interaction_count": 123,
"personal_weights": {},
"global_weights": {},
"alpha_beta": {},
"source": "<string>",
"warning": "<string>",
"hint": "<string>"
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}{
"detail": [
{
"loc": [
"<string>"
],
"msg": "<string>",
"type": "<string>",
"input": "<unknown>",
"ctx": {}
}
]
}{
"error": {
"details": {
"id": "ns_123",
"resource": "namespace"
},
"message": "Namespace not found",
"type": "NotFoundError"
},
"status": 404,
"success": false
}Authorizations
Mixpeek API key, sent as Authorization: Bearer mxp_sk_.... Create one in Studio under Settings → API Keys, or with an admin key via POST /v1/organizations/users/{user_email}/api-keys. A missing header returns 403; an invalid or revoked key returns 401.
Namespace id (ns_...), not the namespace name. This scopes the request rather than authenticating it, and it is required on every operation marked x-mixpeek-namespace-scoped.
Response
Successful Response
Per-user learned fusion weights for a retriever.
The user identifier.
Active context level: personal, demographic, or global.
Number of interactions recorded for this user.
User's personal fusion weights keyed by feature_uri.
Show child attributes
Show child attributes
Global fusion weights for comparison, keyed by feature_uri.
Show child attributes
Show child attributes
Raw alpha/beta parameters per feature_uri.
Show child attributes
Show child attributes
Which store served the weights: 'signals' (the namespace's _signals collection) or 'clickhouse' (analytics fallback).
Set when the response contains fallback defaults due to an internal error.
Set when learned fusion is NOT configured for this retriever — the payload is a well-formed empty state and this explains how to enable learning.
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