# Update classes URL: https://docs.hanzo.ai/docs/openapi/captable/patch-captable-classes-by-id > Replaces one share class's terms. `PATCH /v1/captable/classes/{id}` > [Captable →](https://docs.hanzo.ai/docs/openapi/captable) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | ------------- | ----------------------------------------------- | | **Address** | `https://api.hanzo.ai/v1/captable/classes/{id}` | | **Method** | `PATCH` | | **Operation** | `patch_captable_classes_by_id` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Replaces one share class's terms. It is a full REPLACE and not a merge, despite the PATCH: every field is written as sent, so a field omitted is written empty rather than left alone. Send the whole class. The method is PATCH because the resource is addressed by id, not because the body is partial — and getting that backwards silently blanks terms every later issuance prices against. ## Request 15 fields, body `application/json` (required). | Field | In | Type | Required | Description | | ------------------------------- | ---- | ------ | -------- | ------------------------------------------------------------------------------------------------------------------------- | | `id` | path | string | yes | ID addresses the resource. | | `boardApprovalDate` | body | any | — | BoardApprovalDate is when the board approved the class, YYYY-MM-DD. | | `classType` | body | any | — | ClassType is COMMON or PREFERRED. | | `conversionRights` | body | any | — | ConversionRights is CONVERTS\_TO\_FUTURE\_ROUND or CONVERTS\_TO\_SHARE\_CLASS\_ID. | | `convertsToShareClassId` | body | any | — | ConvertsToShareClassID names the class this one converts into. | | `id` | body | string | — | ID addresses the resource. | | `initialSharesAuthorized` | body | any | — | InitialSharesAuthorized is how many shares this class may issue. | | `liquidationPreferenceMultiple` | body | any | — | LiquidationPreferenceMultiple is the multiple of invested capital paid out before junior classes — 1 for a 1x preference. | | `name` | body | any | — | Name is the share class's name, e.g. "Series A Preferred". | | `parValue` | body | any | — | ParValue is the nominal per-share value on the certificate, in the company's currency. | | `participationCapMultiple` | body | any | — | ParticipationCapMultiple caps participation after the preference is paid, as a multiple of invested capital. | | `pricePerShare` | body | any | — | PricePerShare is the issue price for this class, in the company's currency. | | `seniority` | body | any | — | Seniority orders liquidation preference: LOWER is more senior, so 1 is paid before 2. | | `stockholderApprovalDate` | body | any | — | StockholderApprovalDate is when the stockholders approved it, YYYY-MM-DD. | | `votesPerShare` | body | any | — | VotesPerShare is how many votes one share of this class carries. | ## Response | Status | Body | Meaning | | --------- | ------------------------ | ------- | | `200` | captable.captableUpdated | ok | | `default` | problem-details | refused | `200` body — 2 fields. | Field | In | Type | Always | Description | | --------- | ---- | ------- | ------ | -------------------------------------------------------------------------- | | `message` | body | string | — | Message is the human sentence the cap table wrote, e.g. "Company updated". | | `success` | body | boolean | — | Success is true when the update was applied. | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo captable classes update ``` **SDK** **.ts** ```ts import { Configuration, CaptableApi } from 'hanzoai'; const api = new CaptableApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.patchCaptableClassesById({ id: 'id', boardApprovalDate: "", classType: "" }); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import CaptableApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = CaptableApi(client).patch_captable_classes_by_id(id='id', board_approval_date="", class_type="") ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.CaptableAPI.PatchCaptableClassesById(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, captable_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = captable_api::patch_captable_classes_by_id(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.CaptableApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new CaptableApi(client).patchCaptableClassesById(); ``` **HTTP** ```bash curl -X PATCH https://api.hanzo.ai/v1/captable/classes/ \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "boardApprovalDate": "", "classType": "" }' ``` **MCP** MCP reaches **captable** through the `captable` tool, which names its 30 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them: ```bash curl -X POST https://api.hanzo.ai/v1/mcp \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "describe", "arguments": { "op": "list_captable_classes" } } }' ``` --- [Captable API](https://docs.hanzo.ai/docs/openapi/captable) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)