API · Create · Documents
Generate a document.
Render a structured legal document from a template against an entity's live state. Documents are dual-form by design: every result is both a rendered PDF and a structured JSON object — diffable, queryable, and version-tracked.
Common type values cover the full lifecycle: incorporator_action, bylaws, operating_agreement, stockholders_agreement, option_grant_notice, safe, convertible_note, 83b_election, board_consent, nda, offer_letter, voting_agreement, dissolution_plan. The available templates depend on the entity's jurisdiction and form (c_corp, s_corp, llc, pbc).
Most callers don't invoke this directly — equity, resolution, and filing endpoints generate the documents they need as part of their cascade. Reach for it explicitly when authoring an off-cascade document (an ad-hoc NDA, a custom side letter, a manually-templated employment agreement) or when re-rendering after entity metadata changed.
Returns 202 Accepted. On completion, emits one of: document.generated, document.signed, document.voided. Subscribe via `POST /v1/webhook_endpoints` to consume. Idempotent via Idempotency-Key. See idempotency.
See also: Documents API overview.
Last updated
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
entity_idstringRequiredtypestringRequiredparametersobjectOptionalResponse Body
application/json
application/problem+json
application/problem+json
application/problem+json
application/problem+json
Request
curl -X POST "https://api.mattermode.com/v1/documents" \ -H "Content-Type: application/json" \ -d '{ "entity_id": "ent_Nq3KcAbc", "type": "default", "parameters": {} }'const body = JSON.stringify({ "entity_id": "ent_Nq3KcAbc", "type": "default", "parameters": {}})fetch("https://api.mattermode.com/v1/documents", { method: "POST", headers: { "Content-Type": "application/json" }, body})package mainimport ( "fmt" "net/http" "io/ioutil" "strings")func main() { url := "https://api.mattermode.com/v1/documents" body := strings.NewReader(`{ "entity_id": "ent_Nq3KcAbc", "type": "default", "parameters": {} }`) 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 = { "entity_id": "ent_Nq3KcAbc", "type": "default", "parameters": {}}resp = requests.post( "https://api.mattermode.com/v1/documents", 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("""{ "entity_id": "ent_Nq3KcAbc", "type": "default", "parameters": {}}""");HttpClient client = HttpClient.newBuilder() .connectTimeout(Duration.ofSeconds(10)) .build();HttpRequest.Builder requestBuilder = HttpRequest.newBuilder() .uri(URI.create("https://api.mattermode.com/v1/documents")) .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("""{ "entity_id": "ent_Nq3KcAbc", "type": "default", "parameters": {}}""", Encoding.UTF8, "application/json");var client = new HttpClient();var response = await client.PostAsync("https://api.mattermode.com/v1/documents", body);var responseBody = await response.Content.ReadAsStringAsync();curl --request POST 'https://api.mattermode.com/v1/documents' \ --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 '{ "entity_id": "ent_Nq3KcAbc", "type": "default", "parameters": {}}'const response = await fetch("https://api.mattermode.com/v1/documents", { 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({ "entity_id": "ent_Nq3KcAbc", "type": "default", "parameters": {} }),});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": "document",
"entity_id": "ent_Nq3KcAbc",
"type": "certificate_of_incorporation",
"status": "draft",
"entity_snapshot": {},
"payload": {},
"pdf_url": "https://your.app/webhooks/matter",
"sha256": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
"proof": {},
"version": 1,
"parent_document_id": "string",
"signatures": [
{}
],
"envelope_id": "string",
"sensitivity": "standard",
"metadata": {},
"created": 1745539200,
"updated": 1745539200,
"livemode": false
}{
"type": "https://mattermode.com/docs/errors/invalid_request",
"title": "Invalid request",
"status": 400,
"code": "invalid_request",
"detail": "Request body could not be parsed as JSON.",
"doc_url": "https://mattermode.com/docs/guides/errors#invalid_request",
"request_id": "req_Qw9xYz8A"
}{
"type": "https://mattermode.com/docs/errors/authentication_required",
"title": "Authentication required",
"status": 401,
"code": "authentication_required",
"detail": "No bearer token was supplied. Pass `Authorization: Bearer sk_live_...` on every request.",
"doc_url": "https://mattermode.com/docs/guides/errors#authentication_required",
"request_id": "req_Qw9xYz8A"
}{
"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"
},
"type": "https://errors.mattermode.com/terms_acceptance_required",
"terms_version": "string",
"terms_summary": "string",
"terms_url": "http://example.com"
}{
"type": "https://mattermode.com/docs/errors/rate_limit_exceeded",
"title": "Rate limit exceeded",
"status": 429,
"code": "rate_limit_exceeded",
"detail": "Request rate exceeded for this key. Retry after `retry_after` seconds or honor the `Retry-After` header.",
"doc_url": "https://mattermode.com/docs/guides/errors#rate_limit_exceeded",
"request_id": "req_Qw9xYz8A",
"retry_after": 30
}