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Update a flag
An MCP tool from the Vercel API server, hosted on mcp.hjlabs.in.
Update a flag Update an existing feature flag. This endpoint supports partial updates, allowing you to modify specific properties like variants, environments, or state without providing the full flag configuration. [PATCH /v1/projects/{projectIdOrName}/feature-flags/flags/{flagIdOrSlug}]
Name on the gateway: vercel_api__update_flag · may change things.
Parameters
| Name | Type | Description |
|---|---|---|
projectIdOrName required | string | The project id or name |
flagIdOrSlug required | string | The flag id or name |
ifMatch | string | Etag to match, can be used interchangeably with the if-match header |
withMetadata | boolean | Whether to include metadata in the response |
teamId | string | The Team identifier to perform the request on behalf of. |
slug | string | The Team slug to perform the request on behalf of. |
createdBy | string | The user who created this patch |
message | string | Additional message for this version |
variants | array | The variants of the flag |
environments | object | The configuration for the flag in different environments |
seed | number | A random seed to prevent split points in different flags from having the same… |
description | string | A description of the flag |
state | active | archived | |
maintainerIds | array | The user ids of the maintainers of the flag |
permanent | boolean | Whether this flag is marked as permanent, indicating it should not be removed |
tags | array | Tags for categorizing the flag |
How to call it
Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:
{
"name": "vercel_api__update_flag",
"arguments": {
"projectIdOrName": "…",
"flagIdOrSlug": "…"
}
}Or connect the Vercel API server directly, which lists 472 tools including this one:
claude mcp add --transport http hj-vercel-api https://mcp.hjlabs.in/mcp/vercel-api \
--header "Authorization: Bearer YOUR_API_KEY"Try asking
Use the update a flag tool with projectIdOrName set to ….