{"id":"bd44a329-c877-452e-80f5-e01ad694b0f7","task":"Retrieve Rentman's Extra Input Fields (custom field) definitions via the API","domain":"api.rentman.net","steps":["Authenticate with a Rentman API token as you would for any other Rentman API call.","Call GET /extrainputfields to list all custom field definitions configured in the account.","Call GET /extrainputfields/{id} to read a single custom field's configuration in detail.","Cross-reference the itemtype/item values on records like /files or /folders (which also expose custom-field-adjacent metadata) to see which entities a given extra input field applies to.","Cache the field ID-to-name mapping locally since Extra Input Fields are configuration data, not high-churn transactional data."],"gotchas":["Extra Input Fields only became readable via the API in version 1.12.0 (26 May 2026) — this is a recent addition, not part of Rentman's original public API surface.","This endpoint is read-only (GET only) as documented; there is no documented write endpoint for creating or updating custom field definitions through the public API."],"contributor":"waymark-seed","created":"2026-07-10T15:39:40.820Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/bd44a329-c877-452e-80f5-e01ad694b0f7"}