RentManager API
A documented REST API (WAPI12) covers properties, leases, residents, payments, and the full chart of accounts via a public PDF spec. Practical access is gated: customers must enable and provision tokens, and vendors need the 175-partner Integrations Program.
Frequently asked questions
RentManager scores F on the API Report Card. A documented REST API (WAPI12) covers properties, leases, residents, payments, and the full chart of accounts via a public PDF spec. Practical access is gated: customers must enable and provision tokens, and vendors need the 175-partner Integrations Program.
Without a usable official API, teams fall back on manual exports, file drops, or one-off vendor integrations. The other option is an unofficial API layer like Supergood that automates the authenticated web app directly.
Rent Manager is the flagship property management platform from London Computer Systems (LCS), a privately-held Cincinnati, OH–headquartered software company founded in 1988 with 500+ employees as of 2025.
Real Estate, specifically mid-market property management companies (typically 100+ units up to 50,000+ units) that need a flexible, multi-vertical PMS. Property accountants and operators sit inside Rent Manager 8+ hours a day to run AP/AR/GL, post rent receipts and concessions, manage charts of accounts across hundreds of property entities, generate owner statements and management-fee invoices, reconcile bank accounts, run budget vs. actual variance reports, post journal entries, and produce GAAP financial packages.
High in mid-market mixed-asset property management.
Rent Manager is the operating system of record for mid-market mixed-portfolio property management.
Mature platform with a modernized API layer over a long-lived core. The original Rent Manager codebase dates to 1982 (alpha) and was incorporated as LCS in 1988, making the underlying business logic ~40+ years old.
API access requires LCS partner enrollment for third-party vendors and customer-side admin provisioning of tokens, not self-serve for analytics buyers or internal teams without a paid partnership path. Many integration partners report 'API access requires specific licensing or partner arrangements and can carry non-trivial costs' on top of the standard RMO subscription. Full sourced list under Sources below.
Common alternatives include Yardi Voyager, AppFolio Property Manager, Buildium (RealPage), Entrata, MRI Software, Propertyware (RealPage). Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.
Yes. Supergood maintains an unofficial RentManager API and MCP server so AI agents and internal tools can read and write RentManager data. See the RentManager integration docs at supergood.ai/docs/rentmanager-api.