Mason API
Mason publishes a public OpenAPI 3.1 contract and a Markdown guide for a read-only external API across work orders, calls, invoices, contacts, properties, and units. The gate is provisioning: one bearer token is issued by Mason to each customer account, with no self-serve key, webhooks, or SDKs.
Frequently asked questions
Mason scores D+ on Supergood's API Report Card. Mason publishes a public OpenAPI 3.1 contract and a Markdown guide for a read-only external API across work orders, calls, invoices, contacts, properties, and units. The gate is provisioning: one bearer token is issued by Mason to each customer account, with no self-serve key, webhooks, or SDKs.
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. Site terms may apply to any integration approach, and how they apply is a determination each team makes for itself.
Mason is an AI maintenance coordinator for residential property management companies, built and operated by Enduring Labs, Inc. in San Francisco.
Real Estate & Property. A property manager connects Mason to their PMS (AppFolio, Buildium, Propertyware, or Rentvine) and their Google or Microsoft mailbox.
Mason is an early-stage vendor with a small but real customer base.
Maintenance work orders with status, type, source, urgency, priority, assignment, property and unit links, and full activity history; resident, vendor, and owner contacts; call recordings and transcripts, text message threads, and email threads with residents and vendors; vendor estimates and invoices with approval state and cents-denominated amounts; property and unit records mirrored from the PMS; technician scheduling blocks and on-call coverage schedules; and control logs of the actions Mason took.
Mason is a young company. Its Terms of Service carry an effective date of January 6, 2025, the site footer reads 2026 Enduring Labs, Inc., and the founder and CEO is Nitin Gupta, who previously held leadership roles at Newfront and Pave.
Every published operation is a GET, so integrators cannot create, assign, approve, or close work orders through the API, and no webhooks exist, so everything is polling. Credentials are provisioned manually by the vendor: a single unscoped bearer token arrives by email, with no self-serve key generation, rotation, or revocation. Full sourced list under Sources below.
Common alternatives include Latchel, Property Meld, Lessen, EliseAI. Graded alternatives appear under "More from the report card" below.
Supergood's grades measure one thing: can a customer's engineering team get their own data out programmatically? Supergood checks six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and rolls them into a letter grade. Supergood re-verifies grades, and they only move on evidence.
Not that we could find. There is no official Mason MCP server in any public registry, and no maintained community server we're aware of. We re-verify this periodically — report an inaccuracy below if we missed one.
Not natively. Mason doesn't publish an MCP server, so MCP clients like Claude, Cursor, and Codex have nothing to connect to out of the box. If that changes, this page will reflect it.