Aderant Expert Sierra API
No public API. Aderant says Expert Sierra offers APIs for custom integrations, but there is no self-serve developer portal, key issuance, or SDKs. Integration work is scoped through Aderant or partner implementation engagements.
Frequently asked questions
Aderant Expert Sierra scores F on the API Report Card. No public API. Aderant says Expert Sierra offers APIs for custom integrations, but there is no self-serve developer portal, key issuance, or SDKs. Integration work is scoped through Aderant or partner implementation engagements.
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.
Aderant Expert Sierra is a cloud-based legal practice management platform that centralizes the systems law firms use to run the business of law: matter and client records, time and expense capture, billing and invoicing (including LEDES/eBilling and UTBMS codes), collections, GL/AP/AR, conflicts, and workflow approvals.
Legal Practice Management, Typically for mid-to-large and Am Law law firms needing enterprise time, billing, and financial management. Timekeepers capture time on any device under client guidelines; firms generate and post compliant bills (rate schedules, UTBMS validation, LEDES eBilling), manage collections, and run firm financials (GL/AP/AR) and conflicts checks.
275+ firms on Expert Sierra, including 23% of the Am Law 200; Aderant is a recognized leader in legal practice/financial management. Runs on AWS, trusted by highly regulated organizations.
Yes, Holds a firm's core operating system-of-record: matters, timekeeping, billing/invoices, collections, and full firm financials (GL/AP/AR), business-critical data trapped behind a login.
Aderant Expert is a long-established legal billing platform; Expert Sierra is the modern cloud (AWS) re-platform, with recent AI agent capabilities (Agentic Law Firm Operations). Mature vendor modernizing toward cloud.
API access oriented to custom/partner integration rather than open self-serve. Customizations/integrations require significant implementation effort. Full sourced list under Sources below.
Common alternatives include Thomson Reuters Elite 3E, Litera (Prosperoware/Foundation), Centerbase, ProLaw (Thomson Reuters), Clio (Manage). 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 Aderant Expert Sierra API and MCP server so AI agents and internal tools can read and write Aderant Expert Sierra data. See the Aderant Expert Sierra integration docs at supergood.ai/docs/aderant-expert-sierra-api.