API · Platform · Legal
Accept acknowledgement.
Records standing acceptance of an acknowledgement scoped to the acknowledging natural-person stakeholder. Per-action acknowledgements on binding mutations are still required for action-specific legal acks (formation_is_legally_binding, dissolution_is_irreversible, etc.). This endpoint is primarily for first-touch slugs (not_legal_advice, not_tax_advice).
Idempotent via Idempotency-Key.
Last updated
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
slugstringRequiredTyped identifier for a class of risk the customer is affirming awareness of. Each
slug has canonical plain-English text and a version, fetched via GET /v1/acknowledgements.
Acknowledgements are bound to natural-person stakeholders and expire 90 days after
acceptance; ToS-version supersession invalidates open acknowledgements under the
prior version. See acknowledgements.
"not_legal_advice""not_tax_advice""agent_action_binds_principal""tier_4_standing_authority_acknowledged""incorporator_signature_authorized""formation_is_legally_binding""formation_creates_tax_obligations""83b_election_strict_30_day_deadline""equity_grant_is_securities_issuance""dissolution_is_irreversible""service_of_process_must_reach_human""late_filing_penalty_accepted"versionstringRequiredVersion of the canonical text the stakeholder affirmed. Mismatch → invalidates the acknowledgement.
accepted_by_stakeholder_idstringRequiredThe natural-person stakeholder who affirmed this acknowledgement.
accepted_atintegerRequiredUnix timestamp (seconds since epoch) when the stakeholder typed/clicked the acknowledgement affordance.
ipstringOptionalIP address of the affirming human at acceptance time. Captured for audit.
user_agentstringOptionalUser agent of the affirming human at acceptance time. Captured for audit.
Response Body
application/json
Request
curl -X POST "https://api.mattermode.com/v1/acknowledgements/accept" \ -H "Content-Type: application/json" \ -d '{ "slug": "not_legal_advice", "version": "2026-04-01", "accepted_by_stakeholder_id": "string", "accepted_at": 0 }'const body = JSON.stringify({ "slug": "not_legal_advice", "version": "2026-04-01", "accepted_by_stakeholder_id": "string", "accepted_at": 0})fetch("https://api.mattermode.com/v1/acknowledgements/accept", { method: "POST", headers: { "Content-Type": "application/json" }, body})package mainimport ( "fmt" "net/http" "io/ioutil" "strings")func main() { url := "https://api.mattermode.com/v1/acknowledgements/accept" body := strings.NewReader(`{ "slug": "not_legal_advice", "version": "2026-04-01", "accepted_by_stakeholder_id": "string", "accepted_at": 0 }`) 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 = { "slug": "not_legal_advice", "version": "2026-04-01", "accepted_by_stakeholder_id": "example", "accepted_at": 1}resp = requests.post( "https://api.mattermode.com/v1/acknowledgements/accept", 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("""{ "slug": "not_legal_advice", "version": "2026-04-01", "accepted_by_stakeholder_id": "string", "accepted_at": 0}""");HttpClient client = HttpClient.newBuilder() .connectTimeout(Duration.ofSeconds(10)) .build();HttpRequest.Builder requestBuilder = HttpRequest.newBuilder() .uri(URI.create("https://api.mattermode.com/v1/acknowledgements/accept")) .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("""{ "slug": "not_legal_advice", "version": "2026-04-01", "accepted_by_stakeholder_id": "string", "accepted_at": 0}""", Encoding.UTF8, "application/json");var client = new HttpClient();var response = await client.PostAsync("https://api.mattermode.com/v1/acknowledgements/accept", body);var responseBody = await response.Content.ReadAsStringAsync();curl --request POST 'https://api.mattermode.com/v1/acknowledgements/accept' \ --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 '{ "slug": "not_legal_advice", "version": "2026-04-01", "accepted_by_stakeholder_id": "example", "accepted_at": 1}'const response = await fetch("https://api.mattermode.com/v1/acknowledgements/accept", { 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({ "slug": "not_legal_advice", "version": "2026-04-01", "accepted_by_stakeholder_id": "example", "accepted_at": 1 }),});if (!response.ok) { throw new Error(`Matter API ${response.status}: ${await response.text()}`);}const data = await response.json();console.log(data);Response
201Acceptance recorded.
application/json{
"slug": "not_legal_advice",
"version": "2026-04-01",
"accepted_by_stakeholder_id": "string",
"accepted_at": 0,
"ip": "string",
"user_agent": "string"
}