> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://developer.deel.com/api/stable/reference/endpoints/custom-fields-contracts/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developer.deel.com/_mcp/server. # Custom Fields Contracts > Build apps and integrations that extend and enhance the Deel services. ## API Docs - Custom Fields Contracts [Delete Contract custom field by Id](https://developer.deel.com/api/stable/reference/endpoints/custom-fields-contracts/delete-contract-custom-field.md) - Custom Fields Contracts [Get custom fields from contracts](https://developer.deel.com/api/stable/reference/endpoints/custom-fields-contracts/get-custom-field.md) - Custom Fields Contracts [List all custom fields](https://developer.deel.com/api/stable/reference/endpoints/custom-fields-contracts/list-contract-custom-fields.md) - Custom Fields Contracts [Retrieve custom fields for a contract](https://developer.deel.com/api/stable/reference/endpoints/custom-fields-contracts/get-contract-custom-fields.md) - Custom Fields Contracts [Update custom field value](https://developer.deel.com/api/stable/reference/endpoints/custom-fields-contracts/put-contract-custom-field.md) ## OpenAPI Specification The raw OpenAPI 3.1 specification for this API is available at: - [OpenAPI JSON](https://developer.deel.com/openapi.json) - [OpenAPI YAML](https://developer.deel.com/openapi.yaml)