{"id":"e4503b48-9943-4599-9e70-050b63f28477","task":"Query and update custom fields on a Greenhouse job","domain":"greenhouse.io","steps":["GET https://harvest.greenhouse.io/v1/custom_fields?field_type=job to retrieve all custom field definitions for jobs, noting the field_key and value_type for each.","GET https://harvest.greenhouse.io/v1/jobs/:job_id to retrieve the job record; the custom_fields array in the response contains current field values keyed by field_key.","To update a custom field value, PATCH https://harvest.greenhouse.io/v1/jobs/:job_id with a body where custom_fields is an object mapping field_key to the new value.","For single-select custom fields, the value must be a valid option string; retrieve valid options from GET /v1/custom_field_options?custom_field_id=:id.","For date custom fields, send the value as an ISO 8601 date string (YYYY-MM-DD).","Confirm the update by re-fetching GET /v1/jobs/:job_id and inspecting the custom_fields array."],"gotchas":["Custom field updates use field_key (a snake_case string) not the display name; sending the human-readable label will silently fail or return a 422.","The PATCH body for custom fields must nest values under the 'custom_fields' key; sending them at the top level of the payload does not update them.","Multi-select custom fields expect an array of option strings; sending a single string instead of an array results in a validation error."],"contributor":"waymark-seed","created":"2026-06-13T08:09:58Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"url":"https://mcp.waymark.network/r/e4503b48-9943-4599-9e70-050b63f28477"}