API · Platform · Test Clocks
Create a test clock.
Test-mode only. Creates a named clock frozen at frozen_time. Attach entities via Entity.test_clock at creation time — the clock cannot be retro-attached.
X-Matter-Test-Speed: instant|fast|real handles entity-lifetime simulation. TestClock handles calendar-driven simulation — 30-day 83(b) windows, 12-month franchise-tax cycles, vesting cliffs, FY-end deadlines.
Last updated
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
namestringOptionalfrozen_timeintegerRequiredmetadataobjectOptionalFlat string-to-string map. Up to 50 keys. Keys: max 40 chars, charset
[A-Za-z0-9_\\-.]. Values: max 500 chars. Keys prefixed matter_ are reserved
for platform use. Metadata is retrievable but not filterable via query params.
Response Body
application/json
application/problem+json
Request
curl -X POST "https://api.mattermode.com/v1/test/clocks" \ -H "Content-Type: application/json" \ -d '{ "name": "Waypoint Systems, Inc.", "frozen_time": 0, "metadata": {} }'const body = JSON.stringify({ "name": "Waypoint Systems, Inc.", "frozen_time": 0, "metadata": {}})fetch("https://api.mattermode.com/v1/test/clocks", { method: "POST", headers: { "Content-Type": "application/json" }, body})package mainimport ( "fmt" "net/http" "io/ioutil" "strings")func main() { url := "https://api.mattermode.com/v1/test/clocks" body := strings.NewReader(`{ "name": "Waypoint Systems, Inc.", "frozen_time": 0, "metadata": {} }`) req, _ := http.NewRequest("POST", url, body) req.Header.Add("Content-Type", "application/json") res, _ := http.DefaultClient.Do(req) defer res.Body.Close() body, _ := ioutil.ReadAll(res.Body) fmt.Println(res) fmt.Println(string(body))}import requestsheaders = { "Authorization": "Bearer sk_test_4eC39HqLyjWDarjtT1zdp7dc", "Matter-Version": "2026-06-10", "Idempotency-Key": "ee7c3a9b-3f1a-4d8e-9b2a-7c5e1f0a2d4b",}payload = { "name": "Waypoint Systems, Inc.", "frozen_time": 0, "metadata": {}}resp = requests.post( "https://api.mattermode.com/v1/test/clocks", headers=headers, json=payload,)resp.raise_for_status()print(resp.json())import java.net.URI;import java.net.http.HttpClient;import java.net.http.HttpRequest;import java.net.http.HttpResponse;import java.net.http.HttpResponse.BodyHandlers;import java.time.Duration;import java.net.http.HttpRequest.BodyPublishers;var body = BodyPublishers.ofString("""{ "name": "Waypoint Systems, Inc.", "frozen_time": 0, "metadata": {}}""");HttpClient client = HttpClient.newBuilder() .connectTimeout(Duration.ofSeconds(10)) .build();HttpRequest.Builder requestBuilder = HttpRequest.newBuilder() .uri(URI.create("https://api.mattermode.com/v1/test/clocks")) .header("Content-Type", "application/json") .POST(body) .build();try { HttpResponse<String> response = client.send(requestBuilder.build(), BodyHandlers.ofString()); System.out.println("Status code: " + response.statusCode()); System.out.println("Response body: " + response.body());} catch (Exception e) { e.printStackTrace();}using System;using System.Net.Http;using System.Text;var body = new StringContent("""{ "name": "Waypoint Systems, Inc.", "frozen_time": 0, "metadata": {}}""", Encoding.UTF8, "application/json");var client = new HttpClient();var response = await client.PostAsync("https://api.mattermode.com/v1/test/clocks", body);var responseBody = await response.Content.ReadAsStringAsync();curl --request POST 'https://api.mattermode.com/v1/test/clocks' \ --header 'Authorization: Bearer sk_test_4eC39HqLyjWDarjtT1zdp7dc' \ --header 'Matter-Version: 2026-06-10' \ --header 'Idempotency-Key: ee7c3a9b-3f1a-4d8e-9b2a-7c5e1f0a2d4b' \ --header 'Content-Type: application/json' \ --data '{ "name": "Waypoint Systems, Inc.", "frozen_time": 0, "metadata": {}}'const response = await fetch("https://api.mattermode.com/v1/test/clocks", { method: "POST", headers: { "Authorization": "Bearer sk_test_4eC39HqLyjWDarjtT1zdp7dc", "Matter-Version": "2026-06-10", "Idempotency-Key": "ee7c3a9b-3f1a-4d8e-9b2a-7c5e1f0a2d4b", "Content-Type": "application/json", }, body: JSON.stringify({ "name": "Waypoint Systems, Inc.", "frozen_time": 0, "metadata": {} }),});if (!response.ok) { throw new Error(`Matter API ${response.status}: ${await response.text()}`);}const data = await response.json();console.log(data);Response
application/json{
"id": "string",
"object": "test_clock",
"name": "Waypoint Systems, Inc.",
"frozen_time": 0,
"status": "ready",
"attached_entity_count": 0,
"metadata": {},
"created": 1745539200,
"updated": 1745539200,
"livemode": false
}{
"type": "https://mattermode.com/docs/errors/invalid_state_transition",
"title": "Invalid state transition",
"status": 409,
"detail": "Entity ent_Nq3KcAbc is in state `dissolved` and cannot be dissolved again.",
"instance": "/requests/req_Qw9xYz8A",
"code": "invalid_state_transition",
"param": "founders[0].equity",
"doc_url": "https://mattermode.com/docs/guides/errors#invalid_state_transition",
"request_id": "req_Qw9xYz8A",
"retry_after": 30,
"authorized_by": {
"human_principal_id": "usr_4Kj2m8pQ",
"agent_id": "agt_Nq3KcAbc"
}
}