API · Equity
Trigger mfncascade.
Orchestrate the MFN cascade by iterating the per-SAFE POST /convertibles/{id}/amend primitive across every eligible convertible at the supplied trigger event. The orchestrator emits one mfn_amendment Document per eligible SAFE, opens a SigningEnvelope for each holder with signing_capacity: convertible_holder, and returns a structured per-SAFE result.
Rejection path. If a holder rejects their amendment (SigningEnvelope.counterparty_consent_status: rejected), the round still closes on schedule; the rejected SAFE retains its original terms. MFN was the holder's right to claim, not a company obligation to enforce — the holder may decline. Standard market practice. The rejection is logged on the SAFE's ledger entry and appears in the per-SAFE response below.
Architecture. This endpoint is the orchestrator over the per- SAFE primitive (POST /convertibles/{id}/amend) so callers can either drive the cascade in one call (this endpoint) or drive per-SAFE manually. The primitive remains the source of truth for any single SAFE's amendment; the orchestrator's job is fan-out + fan-in coordination.
Last updated
Query Parameters
dry_runbooleanOptionalIf true, simulate the mutation and return the would-be resource, any cascaded
resources, and a fee estimate — without side effects. Available on every mutation.
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
trigger_round_idstringRequiredThe Round whose close triggers the cascade. Must be in
status: closing or earlier; cannot be triggered
post-close.
authorizing_resolution_idstringOptionalOptional. Required when the cascade is initiated by board action separate from the Round-close authorisation.
only_convertible_entry_idsarray<string>OptionalOptional scope. When provided, only these SAFEs are
iterated; otherwise the orchestrator iterates every
eligible SAFE per cascade_eligibility.
Response Body
application/json
application/json
Request
curl -X POST "https://api.mattermode.com/v1/entities/{id}/mfn_cascade" \ -H "Content-Type: application/json" \ -d '{ "trigger_round_id": "string" }'const body = JSON.stringify({ "trigger_round_id": "string"})fetch("https://api.mattermode.com/v1/entities/{id}/mfn_cascade", { method: "POST", headers: { "Content-Type": "application/json" }, body})package mainimport ( "fmt" "net/http" "io/ioutil" "strings")func main() { url := "https://api.mattermode.com/v1/entities/{id}/mfn_cascade" body := strings.NewReader(`{ "trigger_round_id": "string" }`) 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 = { "trigger_round_id": "example"}resp = requests.post( "https://api.mattermode.com/v1/entities/ent_Nq3KcAbc/mfn_cascade", 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("""{ "trigger_round_id": "string"}""");HttpClient client = HttpClient.newBuilder() .connectTimeout(Duration.ofSeconds(10)) .build();HttpRequest.Builder requestBuilder = HttpRequest.newBuilder() .uri(URI.create("https://api.mattermode.com/v1/entities/{id}/mfn_cascade")) .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("""{ "trigger_round_id": "string"}""", Encoding.UTF8, "application/json");var client = new HttpClient();var response = await client.PostAsync("https://api.mattermode.com/v1/entities/{id}/mfn_cascade", body);var responseBody = await response.Content.ReadAsStringAsync();curl --request POST 'https://api.mattermode.com/v1/entities/ent_Nq3KcAbc/mfn_cascade' \ --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 '{ "trigger_round_id": "example"}'const response = await fetch("https://api.mattermode.com/v1/entities/ent_Nq3KcAbc/mfn_cascade", { 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({ "trigger_round_id": "example" }),});if (!response.ok) { throw new Error(`Matter API ${response.status}: ${await response.text()}`);}const data = await response.json();console.log(data);Response
application/json{
"per_safe_preview": [
{
"convertible_entry_id": "string",
"status": "string",
"proposed_terms_diff": {
"clauses": [
{
"clause_kind": "valuation_cap",
"before": null,
"after": null,
"more_favorable": true,
"ratchet_into_safe": true,
"scope_match": true,
"rationale": "string"
}
]
}
}
]
}{
"object": "mfn_cascade_dispatch",
"per_safe_results": [
{
"convertible_entry_id": "string",
"status": "amendment_sent",
"amendment_document_id": "string",
"envelope_id": "string",
"proposed_terms_diff": {
"clauses": [
{
"clause_kind": "valuation_cap",
"before": null,
"after": null,
"more_favorable": true,
"ratchet_into_safe": true,
"scope_match": true,
"rationale": "string"
}
]
}
}
]
}No example available.