> ## Documentation Index > Fetch the complete documentation index at: https://docs.incident.io/llms.txt > Use this file to discover all available pages before exploring further. # Delete > Delete a custom field ## OpenAPI ````yaml /openapi/deprecated-endpoints.json delete /v1/custom_fields/{id} openapi: 3.0.3 info: description: "This is the API reference for incident.io.\n\nIt documents available API endpoints, provides examples of how to use it, and\ninstructions around things like authentication and error handling.\n\nThe API is hosted at:\n\n- https://api.incident.io/\n\nAnd you will need to create an API key via your [incident.io\ndashboard](https://app.incident.io/settings/api-keys) to make requests.\n\n# Making requests\n\nHere are the key concepts required to make requests to the incident.io API.\n\n## Authentication\n\nFor all requests made to the incident.io API, you'll need an API key.\n\nTo create an API key, head to the incident dashboard and visit [API\nkeys](https://app.incident.io/settings/api-keys). When you create the key, you'll be able to choose what actions it\ncan take for your account: choose carefully, as those roles can only be set\nwhen you first create the key. We'll only show you the token once, so make sure\nyou store it somewhere safe.\n\nAPI keys are global to your incident.io account, and can be managed by anyone\nwho has the right permissions. We display the user that created the API key,\nand the API key will remain valid if that user becomes deactivated.\n\nOnce you have the key, you should make requests to the API that set the\n`Authorization` request header using a \"Bearer\" authentication scheme:\n\n```\nAuthorization: Bearer \n```\n\n## Rate Limits\n\nThe incident.io API enforces rate limits to ensure consistent performance for all users.\n\nThe default rate limit is 1200 requests/minute per API key. This limit applies to most endpoints across the API.\n\nSome endpoints have lower rate limits, particularly those that interact with external third-party systems that impose\ntheir own limitations. These specific limits vary by endpoint, and we recommend relying on the rate-limit error\nresponses to understand usage patterns and implement appropriate retry strategies.\n\nWhen you exceed a rate limit, the API will respond with a `429 Too Many Requests` status code, along with a JSON\nresponse that includes information about the limit and when you can retry:\n\n```json\n{\n \"type\": \"too_many_requests\",\n \"status\": 429,\n \"request_id\": \"b839a403-7704-41c1-bf6a-39a2d68caefa\",\n \"rate_limit\": {\n \"name\": \"api_key_name\",\n \"limit\": 1200,\n \"remaining\": 0,\n \"retry_after\": \"Thu, 17 Apr 2025 11:17:18 UTC\"\n },\n \"errors\": [\n {\n \"code\": \"too_many_requests\",\n \"message\": \"Too many requests hit the API too quickly. We recommend an exponential backoff of your requests.\"\n }\n ]\n}\n```\n\nThe response includes:\n* The name of the API key (`name`)\n* The bucket limit (`limit`)\n* The number of requests remaining (`remaining`)\n* When you can retry requests (`retry_after`)\n\n## Errors\n\nWe use standard HTTP response codes to indicate the status or failure of API\nrequests.\n\nThe API response body will be JSON, and contain more detailed information on the\nnature of the error.\n\nAn example error when a request is made without an API key:\n\n```json\n{\n \"type\": \"authentication_error\",\n \"status\": 401,\n \"request_id\": \"8e3cc412-b49d-4957-9073-2c19d2c61804\",\n \"errors\": [\n {\n \"code\": \"missing_authorization_material\",\n \"message\": \"No authorization material provided in request\"\n }\n ]\n}\n```\n\nNote that the error:\n\n- Contains the HTTP status (`401`)\n- References the type of error (`authentication_error`)\n- Includes a `request_id` that can be provided to incident.io support to help\n\tdebug questions with your API request\n- Provides a list of individual errors, which go into detail about why the error\n\toccurred\n\nThe most common error will be a 422 Validation Error, which is returned when the\nrequest was rejected due to failing validations.\n\nThese errors look like this:\n\n```json\n{\n \"type\": \"validation_error\",\n \"status\": 422,\n \"request_id\": \"631766c4-4afd-4803-997c-cd700928fa4b\",\n \"errors\": [\n {\n \"code\": \"is_required\",\n \"message\": \"A severity is required to open an incident\",\n \"source\": {\n \"field\": \"severity_id\"\n }\n }\n ]\n}\n```\n\nThis error is caused by not providing a severity identifier, which should be at\nthe `severity_id` field of the request payload. Errors like these can be mapped to\nforms, should you be integrating with the API from a user-interface.\n\n## Compatibility\n\nWe won't make breaking changes to existing API services or endpoints, but will\nexpect integrators to upgrade themselves to the latest API endpoints within 3\nmonths of us deprecating the old service.\n\nWe will make changes that are considered backwards compatible, which include:\n\n- Adding new API endpoints and services\n- Adding new properties to responses from existing API endpoints\n- Reordering properties returned from existing API endpoints\n- Adding optional request parameters to existing API endpoints\n- Altering the format or length of IDs\n- Adding new values to enums\n\nIt is important that clients are robust to these changes, to ensure reliable\nintegrations.\n\nAs an example, if you are generating a client using an openapi-generator, ensure\nthe generated client is configured to support unknown enum values, often\nconfigured via the `enumUnknownDefaultCase` parameter.\n\nWhen breaking changes are unavoidable, we'll create a new service version on a\nseparate path, and run them in parallel.\n\nFor example:\n\n- https://api.incident.io/v1/incidents\n- https://api.incident.io/v2/incidents\n\nFor any questions, email support@incident.io.\n" title: incident.io version: 1.0.0 servers: - url: https://api.incident.io security: - BearerAuth: [] tags: - description: "Manage incident actions.\n\nThese endpoints have been deprecated in favour of Actions V2 and Follow-ups V2, as these\nconcepts have become increasingly separate.\n\nIncidents have two types of actions associated to them:\n\n- Actions, used during an incident response as ephemeral todo lists\n- Follow-ups, actions which are for after the incident and can be exported to external\n\tissue trackers\n\nYou can manage actions in the incident Slack channel with /incident actions, or on\nthe incident homepage.\n\nExporting follow-ups to external issue trackers can be done in the incident homepage.\n" name: Actions V1 - description: > Manage and browse catalog resources. These endpoints have been deprecated in favour of CatalogV3. The only breaking change is that the 'manual' attribute mode is now split into 'api' and 'dashboard'. We also removed the usage of some types that were deprecated in the V2 API. Use the incident.io catalog to track services, teams, product features and anything else that helps build a map of your organisation. These different categories of thing become catalog types, and each instance (like a particular service or team) is a catalog entry. Each type is made up of a series of attributes, and each attribute has a type. Types can even have attributes that refer to other catalog types. We automatically create catalog types when you connect an integration, such as GitHub repositories or PagerDuty services and teams. You can use this API to create custom types, that are specifically tailored to your organisation. Examples might be a 'Service' type with an 'Alert channel' which you can point at a Slack channel, or 'Team' which specifies its 'Manager' and 'Technical Lead' as Slack users. You can then use these types to create powerful new workflows. Consider using our official [catalog importer](https://github.com/incident-io/catalog-importer). It can be used to sync catalog data from sources like local files or GitHub and push them into the incident.io catalog without having to directly interact with our public API. name: Catalog V2 - description: > Manage custom fields. Custom fields are used to attach metadata to incidents, which you can use when searching for incidents in the dashboard, triggering workflows, building announcement rules or for your own data needs. Each field has a type: - Single-select, single value selected from a predefined list of options (e.g. Detection Method) - Multi-select, as above but you can pick more than one option (e.g. Affected Teams) - Text, freeform text field (e.g. Customer ID) - Link, link URL that is synced to Slack bookmarks on the incident channel (e.g. External Status Page) - Number, integer or fractional numbers (e.g. # Customers Affected) We may add more custom field types in the future - we'd love to hear any other types you'd like to use! name: Custom Fields V1 - description: > Manage incident roles. During an incident, you can assign responders to one of the incident roles that are configured in your organisation settings. Every organisation will have a special 'lead' role, which signifies the incident lead or commander. This role cannot be deleted, but can be renamed in the incident.io dashboard. name: Incident Roles V1 - description: > Create and read incidents. Incidents are a core resource, on which many other resources (actions, etc) are created. Care should be taken around these endpoints, as automation that creates duplicate incidents can be distracting, and impact reporting. The maximum page size that can be requested is 250. name: Incidents V1 paths: /v1/custom_fields/{id}: delete: tags: - Custom Fields V1 summary: Delete description: Delete a custom field operationId: Custom Fields V1_Delete parameters: - description: Unique identifier for the custom field example: 01FCNDV6P870EA6S7TK1DSYDG0 in: path name: id required: true schema: description: Unique identifier for the custom field example: 01FCNDV6P870EA6S7TK1DSYDG0 type: string responses: '204': description: No Content response. deprecated: true components: securitySchemes: BearerAuth: type: http scheme: bearer description: API key from your incident.io dashboard (Settings → API keys) ````