Session health
Checks whether the site's own code keeps starting new sessions. The SDK starts a new session only after 4 hours of inactivity, so a device that starts a new session within 5 minutes of its previous one was restarted by the site: usually reset() on every page load (for example while login state is still loading, before identify()), a second SDK install, or code that clears storage. Overlapping sessions on one device count as restarts too.
status is restarting when 5% or more of the window's sessions are restarts, ok below that, insufficient_data under 100 sessions, and no_data with no web sessions. likely_cause is reset_before_identify when most restarted sessions open with $identify. The daily sessions alert source uses the same report.
curl -X GET "https://mythic-analytics.gulp.workers.dev/client/v1/data/sessions/health?location_id=example_string&days=3" \
-H "Content-Type: application/json" \
-H "X-Location-Id: example_string" \
-H "Authorization: Bearer YOUR_API_TOKEN"
import requests
import json
url = "https://mythic-analytics.gulp.workers.dev/client/v1/data/sessions/health?location_id=example_string&days=3"
headers = {
"Content-Type": "application/json",
"X-Location-Id": "example_string",
"Authorization": "Bearer YOUR_API_TOKEN"
}
response = requests.get(url, headers=headers)
print(response.json())
const response = await fetch("https://mythic-analytics.gulp.workers.dev/client/v1/data/sessions/health?location_id=example_string&days=3", {
method: "GET",
headers: {
"Content-Type": "application/json",
"X-Location-Id": "example_string",
"Authorization": "Bearer YOUR_API_TOKEN"
}
});
const data = await response.json();
console.log(data);
package main
import (
"fmt"
"net/http"
)
func main() {
req, err := http.NewRequest("GET", "https://mythic-analytics.gulp.workers.dev/client/v1/data/sessions/health?location_id=example_string&days=3", nil)
if err != nil {
panic(err)
}
req.Header.Set("Content-Type", "application/json")
req.Header.Set("X-Location-Id", "example_string")
req.Header.Set("Authorization", "Bearer YOUR_API_TOKEN")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
fmt.Println("Response Status:", resp.Status)
}
require 'net/http'
require 'json'
uri = URI('https://mythic-analytics.gulp.workers.dev/client/v1/data/sessions/health?location_id=example_string&days=3')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Get.new(uri)
request['Content-Type'] = 'application/json'
request['X-Location-Id'] = 'example_string'
request['Authorization'] = 'Bearer YOUR_API_TOKEN'
response = http.request(request)
puts response.body
{
"success": true,
"data": {
"location_id": "538d4ced-447c-40b9-9afa-d220f9afcc84",
"status": "restarting",
"days": 3,
"sessions": 315,
"devices": 150,
"restarts": 138,
"restart_devices": 29,
"restart_rate": 0.4381,
"likely_cause": "reset_before_identify",
"message": "43.8% of sessions started within 5 minutes of the same device's previous session. ...",
"first_events": [
{
"event": "$identify",
"count": 112
},
{
"event": "$pageleave",
"count": 10
}
],
"examples": [
{
"device_id": "01a06b84-dfdb-78d8-9cae-bf7ddf60ddc6",
"previous_session_id": "01a11711-e31f-7f22-b1cd-32abf507c2e6",
"session_id": "01a11712-4aa5-7582-a8af-8dffeba7a225",
"started_at": "2026-10-07 15:53:57",
"first_event": "$identify",
"gap_seconds": 0
}
],
"thresholds": {
"gap_seconds": 300,
"restart_rate": 0.05,
"min_sessions": 100
}
}
}
{
"error": "Bad Request",
"message": "The request contains invalid parameters or malformed data",
"code": 400,
"details": [
{
"field": "email",
"message": "Invalid email format"
}
]
}
{
"error": "Unauthorized",
"message": "Authentication required. Please provide a valid API token",
"code": 401
}
{
"error": "Forbidden",
"message": "You don't have permission to access this resource",
"code": 403
}
{
"error": "Too Many Requests",
"message": "Rate limit exceeded. Please try again later",
"code": 429,
"retryAfter": 3600
}
{
"error": "Error",
"message": "An upstream data service failed",
"code": 502
}
{
"error": "Service Unavailable",
"message": "The service is temporarily unavailable. Please try again later",
"code": 503
}
/sessions/health
Target server for requests. Edit to use your own host.
Agency key (ak_) or location secret key (sk_) as a bearer token. Format: Bearer ak_... or Bearer sk_.... Scoped keys (mcp_) are accepted too and need the read scope of the family the route belongs to (people, events, sessions, replays, exceptions, heatmaps or bigquery_export). See Using an mcp_ key over HTTP.
ak_) or location secret key (sk_) as a bearer token. Format: Bearer ak_... or Bearer sk_.... Scoped keys (mcp_) are accepted too and need the read scope of the family the route belongs to (people, events, sessions, replays, exceptions, heatmaps or bigquery_export). See Using an mcp_ key over HTTP.
Alternative to the X-Location-Id header for agency (ak_) keys. Ignored for secret (sk_) keys.
Trailing window in days. Default 3, min 1, max 30.
Location to scope the request to. Required for agency (ak_) keys on the event routes. Ignored for secret (sk_) keys, which resolve their own location, and not used by /export.
Request Preview
Response
Response will appear here after sending the request
Authentication
Bearer token. Agency key (ak_) or location secret key (sk_) as a bearer token. Format: Bearer ak_... or Bearer sk_.... Scoped keys (mcp_) are accepted too and need the read scope of the family the route belongs to (people, events, sessions, replays, exceptions, heatmaps or bigquery_export). See Using an mcp_ key over HTTP.
Query Parameters
Alternative to the X-Location-Id header for agency (ak_) keys. Ignored for secret (sk_) keys.
Trailing window in days. Default 3, min 1, max 30.
Headers
Location to scope the request to. Required for agency (ak_) keys on the event routes. Ignored for secret (sk_) keys, which resolve their own location, and not used by /export.
Responses
How often the site's code starts new sessions in the trailing window.