API · Create · Entities
Create an entity.
Form a new legal entity in one call. Submits the certificate of incorporation to the secretary of state, signs the incorporator chain over to the founders, and queues every downstream filing — EIN, 83(b) elections — so the entity arrives operationally ready. (A domestic entity files no FinCEN BOI report: under the March 2025 interim rule, BOI applies only to foreign-formed reporting companies registering to do business in the US — a foreign-qualification concern, not domestic formation.) Returns 202 Accepted with a draft entity. The terminal registered state arrives on the entity.state_changed webhook; intermediate signals (filing.accepted, incorporator_receipt.issued, tax_election.window_opened) fire as each cascade resolves. Defaulted fields are echoed back in applied_defaults[] so callers can see what was assumed. See create defaults and create cascades for the full enumeration of what gets filled in and what gets filed. Recommended flow to create a company (agent): start from an authenticated instance — an API key from the user's dashboard (Settings -> API keys), configured in the MCP client — and create in test mode (sk_test_) first. Then call this endpoint (create_entity), then formation_packet, then sign each formation document with sign_document. Skip the create_intent dry-run for the straightforward case, and do NOT call submit — signed documents are the finish line; submit begins the (simulated, in test mode) government filing. In test mode the whole arc needs no human signature round-trip. Test / sandbox conventions: with a sk_test_/sk_sandbox_ key this endpoint accepts a cold one-message answer and self-normalizes it — Delaware → US-DE, an auto corporate designator, percentages → basis points, and sandbox defaults for anything absent (share structure, governance, registered agent, EIN). Every coercion is echoed back in a sandbox_coercions[] array so the agent can surface them in its single pre-sign confirmation. FinCEN BOI personal-owner fields (DOB, SSN/ITIN, residential address) are deferred and not collected in the formation turn. Live mode stays strict and omits sandbox_coercions.
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.
Header Parameters
X-Matter-Test-SpeedstringOptionalTest-mode only. real mirrors live timelines with mocked state responses.
fast uses a ~1-second cadence per filing (default in dev). instant makes
mutations synchronous — the response carries the terminal resource — for CI
tests and demo flows that need the post-submit state visible immediately.
Live-mode rejection. Sending this header with a sk_live_… / rk_live_… /
sk_dashboard_live_… bearer returns 400 invalid_header_for_live_mode.
Live filings move at the speed of the underlying state-of-incorporation
portal; there is no client-side simulation knob.
"real""fast""instant"Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
incorporator_founder_indexintegerRequiredZero-based index into founders[] identifying the natural-person who is
named as incorporator on the Certificate of Incorporation. Matter never
signs as incorporator — the customer's named founder does, either via a
signing envelope (Rail 1) or through their electronic agent under
UETA §14 standing consent (Rail 2). The selected founder must have
email set and (for Rail 2) a stakeholder identity verifiable by
Clerk OAuth. See legal basis.
acknowledgementsarray<object>RequiredPer-action informed acknowledgements. Each entry is bound to a specific
natural-person stakeholder. Required slugs for this operation are listed
on the operation's x-matter-required-acknowledgements extension. Missing
required slugs return RFC 7807
acknowledgement_required (422).
See acknowledgements.
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.
typestringRequired"c_corp""s_corp""llc""benefit_corp""nonprofit""lp""llp"jurisdictionstringRequiredISO 3166-2 subdivision code. For US entities, this is the formation state
(US-DE, US-CA). For entities in other countries, top-level jurisdiction code.
legal_namestringRequiredFull legal name as it should appear on filings, including the corporate
designator (Inc., LLC, etc.). Must satisfy GET /entities/name_availability
in the target jurisdiction at submission time.
principal_officeobjectOptionalPrincipal place of business. Required by most state franchise-tax annual
reports and IRS Form SS-4. Distinct from the registered office (which lives
on registered_agent). Strongly recommended; omitting will block downstream
cascades that need it (annual report filing, SS-4 if no responsible-party
address).
line1stringRequiredline2stringOptionalcitystringRequiredcountystringOptionalCounty, parish, or borough. Optional for most addresses but required
in the registered-agent block of certain state filings (DE Certificate
of Incorporation per 8 Del. C. §131; analogous fields in NY and MD,
parishes in LA). When omitted, the recommendation engine derives the
county from line1 + region against the @repo/jurisdictions data
— populated automatically for Matter-provided registered agents.
regionstringRequiredState, province, or region code (e.g. DE, CA, NY).
postal_codestringRequiredcountrystringRequiredISO 3166-1 alpha-2.
purpose_clausestringOptionalOptional override for the certificate of incorporation's purpose clause. Defaults to the DGCL boilerplate (or the equivalent for non-DE jurisdictions). Override only for regulated industries, benefit corporations with required statutory language, or non-profit purpose statements.
foundersarray<object>OptionalConvenience shape for the most common case: 1–5 humans, each becoming a
Stakeholder with role founder and an issuance of restricted common stock
at par value. Each founder receives equity_basis_points / 10000 × share_structure.founder_shares_total shares with a 4-year monthly vesting
schedule and 1-year cliff (NVCA standard) unless overridden per-founder.
All founders[i].equity_basis_points must sum to exactly 10000 (= 100%).
Note: this is 100% of the issued founder pool, not authorized — the
option-pool reservation is separate.
For more sophisticated formations (mixed vested + unvested founder stock,
advisor grants at formation, multiple share classes), use the explicit
incorporators[] + initial_issuances[] + stakeholders[] shape below.
The convenience and explicit shapes are mutually exclusive — supplying
both returns 422 conflicting_inputs.
namestringRequiredFull legal name as it should appear on filings.
rolestringRequiredFree-form title (CEO, CTO, …). Populates Stakeholder.roles[].title;
not legally meaningful at formation. Legally meaningful role types
(founder, officer, director) live on Stakeholder.roles[].type and
are inferred — every founder gets roles: [{type: founder}].
equity_basis_pointsintegerRequiredFounder's portion of the issued founder-share pool in basis points
(100 bps = 1%). Integer to avoid float precision drift (1/3 split as
3334+3333+3333 = exactly 10000). All founders[].equity_basis_points
must sum to exactly 10000.
emailstring<email>Optionaldate_of_birthstring<date>OptionalRequired for FinCEN BOI initial reporting if this founder is a ≥25% beneficial owner. Omit only when the founder is non-beneficial-owner (rare at formation).
residential_addressobjectOptionalResidential — not business — address. Required for FinCEN BOI per 31 CFR §1010.380(d)(1)(ii)(C).
line1stringRequiredline2stringOptionalcitystringRequiredcountystringOptionalCounty, parish, or borough. Optional for most addresses but required
in the registered-agent block of certain state filings (DE Certificate
of Incorporation per 8 Del. C. §131; analogous fields in NY and MD,
parishes in LA). When omitted, the recommendation engine derives the
county from line1 + region against the @repo/jurisdictions data
— populated automatically for Matter-provided registered agents.
regionstringRequiredState, province, or region code (e.g. DE, CA, NY).
postal_codestringRequiredcountrystringRequiredISO 3166-1 alpha-2.
identificationobjectOptionalGovernment-issued identification on file. Required for FinCEN BOI.
The image (driver's license / passport scan) is uploaded separately
via POST /files and referenced here by image_document_id.
typestringOptional"passport""drivers_license""state_id""foreign_passport"number_tokenstringOptionalTokenized ID number from POST /tokens/tax_ids. Plaintext is
never accepted on the wire.
jurisdictionstringOptionalISO 3166-2 subdivision code. For US entities, this is the formation state
(US-DE, US-CA). For entities in other countries, top-level jurisdiction code.
image_document_idstringOptionaltax_id_tokenstringOptionalTokenized SSN/ITIN created via POST /tokens/tax_ids. Required if
this founder is the EIN responsible party or will receive an 83(b)
election. Plaintext SSN/ITIN is never accepted on the wire.
citizenshipstringOptionalISO 3166-1 alpha-2 country code. Required for FinCEN BOI.
vesting_scheduleobjectOptionalReverse-vesting on the founder's restricted-stock issuance. Defaults to NVCA standard (4-year monthly with 1-year cliff, no acceleration). Override per-founder for board members, advisors, or fully-vested early founders.
cliff_monthsintegerOptionaltotal_monthsintegerOptionalgranularitystringOptional"daily""monthly""quarterly""annually"accelerationobjectOptionalkindstringOptional"single_trigger""double_trigger""none"percent_basis_pointsintegerOptionalincorporatorsarray<object>OptionalDGCL §103 signers of the certificate of incorporation. Defaults to a
single Matter-as-incorporator (the foundation of the Incorporator
Protocol — see IncorporatorReceipt). Override only when a specific
natural-person or external-counsel incorporator is required (e.g., a
paralegal-of-record at outside counsel).
stakeholder_idstringOptionalReference an existing Stakeholder.
kindstringOptional"matter_default""natural_person""entity"namestringOptionalmailing_addressobjectOptionalStructured address.
line1stringRequiredline2stringOptionalcitystringRequiredcountystringOptionalCounty, parish, or borough. Optional for most addresses but required
in the registered-agent block of certain state filings (DE Certificate
of Incorporation per 8 Del. C. §131; analogous fields in NY and MD,
parishes in LA). When omitted, the recommendation engine derives the
county from line1 + region against the @repo/jurisdictions data
— populated automatically for Matter-provided registered agents.
regionstringRequiredState, province, or region code (e.g. DE, CA, NY).
postal_codestringRequiredcountrystringRequiredISO 3166-1 alpha-2.
initial_issuancesarray<object>OptionalExplicit restricted-stock issuances at formation. Use when the simple
founders[] shape is insufficient — e.g., a founder takes a mix of
fully-vested + unvested shares, advisors get small early grants, or
different share classes are issued at formation. Each entry produces a
share_ledger issuance entry, an RSPA document, and (when restricted=true
with a vesting schedule and file_83b=true) an auto-cascaded
tax_elections of kind: section_83b with due_at = grant_date + 30d.
stakeholder_idstringRequiredquantityintegerRequiredrestrictedbooleanOptionalvesting_scheduleobjectOptionalcliff_monthsintegerOptionaltotal_monthsintegerOptionalgranularitystringOptional"daily""monthly""quarterly""annually"accelerationobjectOptionalkindstringOptional"single_trigger""double_trigger""none"percent_basis_pointsintegerOptionalfile_83bbooleanOptionalAuto-cascade an 83(b) election letter and e-file it electronically
within the 30-day deadline (see efile83bElection). Set to false only when the recipient
is a non-US person or has an explicit reason to forgo §83(b)
(rare). Missed elections are not reversible.
stakeholdersarray<object>OptionalOptional non-founder stakeholders to create at formation (advisors,
board observers, early employees with same-day grants). Founders
declared via founders[] should not be repeated here.
governanceobjectOptionalGovernance configuration used to populate bylaws boilerplate and define the entity's operating rules (DGCL §141, §211, §228 et al). All fields defaulted; override only for non-standard structures.
docsbooleanOptionalGenerate canonical governance docs (bylaws, action of incorporator, initial board consent, RSPAs).
board_sizeintegerOptionalInitial board size. Defaults to 1 (sole-founder CEO/director).
action_by_written_consent_allowedbooleanOptionalDGCL §228 — allow stockholder action by written consent.
quorum_basis_pointsintegerOptionalStockholder-meeting quorum threshold in basis points (50.01% by default).
fiscal_year_endstringOptionalFiscal year-end as MM-DD. Drives every downstream tax-filing
deadline (Form 1120 due 4 months + 15 days after FYE).
registered_agentobjectOptionalproviderstringOptional"matter""external"external_providerobjectOptionalRequired when provider=external. Per DGCL §132(b) the new agent
must consent in writing — supply a consent_document_id referencing
an uploaded notarized consent.
namestringOptionaladdressobjectOptionalStructured address.
line1stringRequiredline2stringOptionalcitystringRequiredcountystringOptionalCounty, parish, or borough. Optional for most addresses but required
in the registered-agent block of certain state filings (DE Certificate
of Incorporation per 8 Del. C. §131; analogous fields in NY and MD,
parishes in LA). When omitted, the recommendation engine derives the
county from line1 + region against the @repo/jurisdictions data
— populated automatically for Matter-provided registered agents.
regionstringRequiredState, province, or region code (e.g. DE, CA, NY).
postal_codestringRequiredcountrystringRequiredISO 3166-1 alpha-2.
consent_document_idstringOptionaltaxobjectOptionalein_applicationobjectOptionalIRS Form SS-4 application. Defaults to applying online via Matter. Online filing requires a US-person responsible party with SSN or ITIN and resolves in <1 business day. A foreign responsible party falls back to paper-fax SS-4, which takes 4–6 weeks for the IRS to issue the EIN — meaningful difference for downstream cascades.
applybooleanOptionalresponsible_partyobjectOptionalstakeholder_idstringOptionaltax_id_tokenstringOptionalTokenized SSN/ITIN (POST /tokens/tax_ids).
foreign_responsible_partybooleanOptionalSet true when the responsible party has no SSN/ITIN. Cascade switches to paper-fax SS-4. Resulting EIN webhook fires weeks later instead of within 24 hours.
principal_business_activitystringOptionalIRS Form SS-4 line 16 — the principal activity of the business
(the line-16 checkbox category). Required on the EIN application:
the IRS will not issue an EIN without it. Use other together with
principal_product_or_service when no listed category fits.
"construction""real_estate""rental_and_leasing""manufacturing""transportation_and_warehousing""finance_and_insurance""health_care_and_social_assistance""accommodation_and_food_service""wholesale_agent_broker""wholesale_other""retail""other"principal_product_or_servicestringOptionalIRS Form SS-4 line 17 — the principal line of merchandise sold,
specific construction work done, products produced, or services
provided (free text, e.g. "SaaS analytics software", "general
contracting"). Required when principal_business_activity = other.
governance_docsbooleanOptionalDeprecatedDeprecated alias for governance.docs. Will be removed in a future
Matter-Version. Use governance.docs instead.
portfolio_idstringOptionalmetadataobjectOptionalFlat 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
application/problem+json
application/problem+json
application/problem+json
application/problem+json
application/problem+json
application/problem+json
Request
curl -X POST "https://api.mattermode.com/v1/entities" \ -H "Content-Type: application/json" \ -d '{ "type": "c_corp", "jurisdiction": "US-DE", "legal_name": "Waypoint Systems, Inc.", "principal_office": { "line1": "548 Market St", "line2": "PMB 71283", "city": "San Francisco", "region": "CA", "postal_code": "94104", "country": "US" }, "founders": [ { "name": "Jane Doe", "role": "CEO", "equity_basis_points": 8000, "email": "jane@example.com" }, { "name": "Michael Smith", "role": "CTO", "equity_basis_points": 2000, "email": "michael@example.com" } ], "registered_agent": { "provider": "matter" }, "tax": { "ein_application": { "apply": true } } }'const body = JSON.stringify({ "type": "c_corp", "jurisdiction": "US-DE", "legal_name": "Waypoint Systems, Inc.", "principal_office": { "line1": "548 Market St", "line2": "PMB 71283", "city": "San Francisco", "region": "CA", "postal_code": "94104", "country": "US" }, "founders": [ { "name": "Jane Doe", "role": "CEO", "equity_basis_points": 8000, "email": "jane@example.com" }, { "name": "Michael Smith", "role": "CTO", "equity_basis_points": 2000, "email": "michael@example.com" } ], "registered_agent": { "provider": "matter" }, "tax": { "ein_application": { "apply": true } }})fetch("https://api.mattermode.com/v1/entities", { 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" body := strings.NewReader(`{ "type": "c_corp", "jurisdiction": "US-DE", "legal_name": "Waypoint Systems, Inc.", "principal_office": { "line1": "548 Market St", "line2": "PMB 71283", "city": "San Francisco", "region": "CA", "postal_code": "94104", "country": "US" }, "founders": [ { "name": "Jane Doe", "role": "CEO", "equity_basis_points": 8000, "email": "jane@example.com" }, { "name": "Michael Smith", "role": "CTO", "equity_basis_points": 2000, "email": "michael@example.com" } ], "registered_agent": { "provider": "matter" }, "tax": { "ein_application": { "apply": true } } }`) 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 = { "type": "c_corp", "jurisdiction": "US-DE", "legal_name": "Waypoint Systems, Inc.", "principal_office": { "line1": "548 Market St", "line2": "PMB 71283", "city": "San Francisco", "region": "CA", "postal_code": "94104", "country": "US" }, "founders": [ { "name": "Jane Doe", "role": "CEO", "equity_basis_points": 8000, "email": "jane@example.com" }, { "name": "Michael Smith", "role": "CTO", "equity_basis_points": 2000, "email": "michael@example.com" } ], "registered_agent": { "provider": "matter" }, "tax": { "ein_application": { "apply": true } }}resp = requests.post( "https://api.mattermode.com/v1/entities", 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("""{ "type": "c_corp", "jurisdiction": "US-DE", "legal_name": "Waypoint Systems, Inc.", "principal_office": { "line1": "548 Market St", "line2": "PMB 71283", "city": "San Francisco", "region": "CA", "postal_code": "94104", "country": "US" }, "founders": [ { "name": "Jane Doe", "role": "CEO", "equity_basis_points": 8000, "email": "jane@example.com" }, { "name": "Michael Smith", "role": "CTO", "equity_basis_points": 2000, "email": "michael@example.com" } ], "registered_agent": { "provider": "matter" }, "tax": { "ein_application": { "apply": true } }}""");HttpClient client = HttpClient.newBuilder() .connectTimeout(Duration.ofSeconds(10)) .build();HttpRequest.Builder requestBuilder = HttpRequest.newBuilder() .uri(URI.create("https://api.mattermode.com/v1/entities")) .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("""{ "type": "c_corp", "jurisdiction": "US-DE", "legal_name": "Waypoint Systems, Inc.", "principal_office": { "line1": "548 Market St", "line2": "PMB 71283", "city": "San Francisco", "region": "CA", "postal_code": "94104", "country": "US" }, "founders": [ { "name": "Jane Doe", "role": "CEO", "equity_basis_points": 8000, "email": "jane@example.com" }, { "name": "Michael Smith", "role": "CTO", "equity_basis_points": 2000, "email": "michael@example.com" } ], "registered_agent": { "provider": "matter" }, "tax": { "ein_application": { "apply": true } }}""", Encoding.UTF8, "application/json");var client = new HttpClient();var response = await client.PostAsync("https://api.mattermode.com/v1/entities", body);var responseBody = await response.Content.ReadAsStringAsync();curl --request POST 'https://api.mattermode.com/v1/entities' \ --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 '{ "type": "c_corp", "jurisdiction": "US-DE", "legal_name": "Waypoint Systems, Inc.", "principal_office": { "line1": "548 Market St", "line2": "PMB 71283", "city": "San Francisco", "region": "CA", "postal_code": "94104", "country": "US" }, "founders": [ { "name": "Jane Doe", "role": "CEO", "equity_basis_points": 8000, "email": "jane@example.com" }, { "name": "Michael Smith", "role": "CTO", "equity_basis_points": 2000, "email": "michael@example.com" } ], "registered_agent": { "provider": "matter" }, "tax": { "ein_application": { "apply": true } }}'const response = await fetch("https://api.mattermode.com/v1/entities", { 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({ "type": "c_corp", "jurisdiction": "US-DE", "legal_name": "Waypoint Systems, Inc.", "principal_office": { "line1": "548 Market St", "line2": "PMB 71283", "city": "San Francisco", "region": "CA", "postal_code": "94104", "country": "US" }, "founders": [ { "name": "Jane Doe", "role": "CEO", "equity_basis_points": 8000, "email": "jane@example.com" }, { "name": "Michael Smith", "role": "CTO", "equity_basis_points": 2000, "email": "michael@example.com" } ], "registered_agent": { "provider": "matter" }, "tax": { "ein_application": { "apply": true } } }),});if (!response.ok) { throw new Error(`Matter API ${response.status}: ${await response.text()}`);}const data = await response.json();console.log(data);Response
application/json{
"resource": {
"id": "ent_Nq3KcAbc",
"object": "entity",
"status": "draft",
"type": "c_corp",
"jurisdiction": "US-DE",
"legal_name": "Waypoint Systems, Inc.",
"created": 1745539200,
"updated": 1745539200,
"livemode": false
},
"intent": {
"id": "string",
"object": "intent",
"goal": "form_startup_ready_corporation",
"parameters": {},
"status": "draft",
"created": 1745539200,
"updated": 1745539200,
"livemode": false
},
"execution_plan": {
"steps": [
{
"operation": "string",
"status": "pending"
}
]
},
"authorization": {
"id": "string",
"object": "authorization",
"token_id": "tok_4Kj2m8pQ",
"action": "string",
"payload_hash": "string",
"status": "pending",
"expires_at": 1745539200,
"created": 1745539200,
"updated": 1745539200,
"livemode": false
},
"pending_filings": [
{
"id": "string",
"object": "filing",
"entity_id": "ent_Nq3KcAbc",
"type": "certificate_of_amendment",
"jurisdiction": "US-DE",
"status": "preparing",
"created": 1745539200,
"updated": 1745539200,
"livemode": false
}
],
"cascaded_documents": [
{
"id": "string",
"object": "document",
"entity_id": "ent_Nq3KcAbc",
"type": "certificate_of_incorporation",
"status": "draft",
"sha256": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
"version": 1,
"created": 1745539200,
"updated": 1745539200,
"livemode": false
}
],
"cascaded_resolutions": [
{
"id": "string",
"object": "resolution",
"entity_id": "ent_Nq3KcAbc",
"kind": "board_meeting",
"subject": "Approval of 2026 Equity Plan and initial pool of 2,000,000 shares",
"created": 1745539200,
"updated": 1745539200,
"livemode": false
}
],
"events_emitted": [
"string"
],
"applied_defaults": [
"string"
],
"next_steps": [
{
"endpoint": "POST /v1/entities/ent_Nq3KcAbc/tax_elections",
"reason": "Founder restricted-stock issuances require 83(b) within 30 days."
}
]
}{
"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"
}{
"type": "https://mattermode.com/docs/errors/scope_denied",
"title": "Scope denied",
"status": 403,
"code": "scope_denied",
"detail": "Token tok_8FbWcEoP9 has no grant on entity ent_Nq3KcAbc.",
"doc_url": "https://mattermode.com/docs/guides/errors#scope_denied",
"request_id": "req_Qw9xYz8A"
}{
"type": "https://mattermode.com/docs/errors/invalid_state_transition",
"title": "Invalid state transition",
"status": 409,
"code": "invalid_state_transition",
"detail": "Entity ent_Nq3KcAbc is in state `dissolved`; `dissolve` is not a valid transition.",
"doc_url": "https://mattermode.com/docs/guides/errors#invalid_state_transition",
"request_id": "req_Qw9xYz8A",
"current_state": "dissolved",
"attempted_transition": "dissolve",
"allowed_transitions": []
}{
"type": "https://mattermode.com/docs/errors/dissolution_prerequisites_missing",
"title": "Dissolution prerequisites missing",
"status": 409,
"code": "dissolution_prerequisites_missing",
"detail": "Voluntary dissolution requires `board_resolution_id` and `stockholder_consent_id`, or `auto_generate_resolutions: true`.",
"doc_url": "https://mattermode.com/docs/guides/errors#dissolution_prerequisites_missing",
"request_id": "req_Qw9xYz8A"
}{
"type": "https://mattermode.com/docs/errors/valuation_stale",
"title": "409A valuation stale",
"status": 409,
"code": "valuation_stale",
"detail": "Active 409A val_AbCd1234 is older than 12 months or superseded by a material event. Issuing ISOs at the prior strike risks IRC §409A violation. Refresh via POST /entities/{id}/valuations/{id}/refresh_request.",
"doc_url": "https://mattermode.com/docs/guides/errors#valuation_stale",
"request_id": "req_Qw9xYz8A"
}{
"type": "https://mattermode.com/docs/errors/validation_failed",
"title": "Validation failed",
"status": 422,
"code": "validation_failed",
"detail": "One or more fields failed validation. See `errors[]`.",
"doc_url": "https://mattermode.com/docs/guides/errors#validation_failed",
"request_id": "req_Qw9xYz8A",
"errors": [
{
"field": "founders[0].equity",
"code": "out_of_range",
"message": "Equity must sum to 100% across all founders."
}
]
}{
"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
}{
"type": "https://mattermode.com/docs/errors/internal_error",
"title": "Internal server error",
"status": 500,
"code": "internal_error",
"detail": "An unexpected error occurred. Retry idempotently or contact support with the `request_id`.",
"doc_url": "https://mattermode.com/docs/guides/errors#internal_error",
"request_id": "req_Qw9xYz8A"
}Cascade
A single call kicks off: {"kind":"filing","type":"certificate_of_incorporation","timing":"immediate"} → {"kind":"filing","type":"form_ss4","timing":"immediate"} → {"kind":"document","type":"bylaws","timing":"immediate"} → {"kind":"document","type":"action_of_incorporator","timing":"immediate"} → {"kind":"document","type":"initial_board_consent","timing":"immediate"} → {"kind":"document","type":"rspa","timing":"per_initial_issuance"} → {"kind":"tax_election","type":"section_83b","timing":"per_restricted_issuance"} → {"kind":"incorporator_receipt","timing":"on_state_acceptance"}