Elite/3E API
Elite/3E is Thomson Reuters’ ERP for law firms covering financials, practice management, and billing. This page is an independent design exercise that asks what a well-designed Elite/3E API could look like: the resources it would expose, the authentication it would need, and the workflows it could unlock. Below: a hypothetical endpoint design, the technical requirements a production implementation would face, the use cases programmatic access could serve, and where to start if your team needs this kind of access today.
This page is an independent analysis by Supergood of what a well-designed Elite/3E API could look like. It draws on publicly available information, vendor materials, and general integration experience in this category. Nothing on this page describes an existing Elite/3E product, and Supergood is not affiliated with or endorsed by the vendor. If the vendor offers an official API, we highly recommend it.
What is Elite/3E?
Elite/3E is Thomson Reuters’ ERP for law firms covering financials, practice management, and billing. It centralizes:
- Clients and matters
- Time and expense entry (WIP)
- Proforma (pre-bill) generation and approval routing
- Invoicing (including LEDES formats) and accounts receivable
- General ledger, accounts payable, trust accounting, and reporting
Ecosystem products commonly co-deployed with 3E include:
- eBillingHub (electronic billing submission and status tracking for client portals)
- MatterSphere (matter-centric workspace integrated with Microsoft Office)
- ProLaw (case management and practice management, often at small/midsize firms)
- 3E Essentials (streamlined cloud offering with modular capabilities)
- Elite Payments (formerly Tranch) for client-friendly payment plans and collections
An API for a platform like this would naturally organize around its core data entities:
- Clients, matters, and responsible timekeepers
- Time and expense entries (WIP) with LEDES phase/task/activity codes
- Proformas (draft bills), invoices, adjustments, write-downs, and write-offs
- eBilling submissions, statuses, and remittance messages
- Payments and allocations (including trust transfers and Elite Payments)
The Elite/3E Integration Challenge
Law firms rely on 3E daily, but turning portal-centric workflows into automated pipelines is tough:
- Entitlements and licensing: Access varies across core 3E, 3E Essentials, and add-ons like eBillingHub; API coverage differs by module and version
- Enterprise security controls: MFA complicate headless automation; on-prem deployments add network and VPN constraints
- Portal-first experiences: Key actions, proforma generation/approval, invoice finalization, eBilling submissions, often live in the UI; webhook coverage is limited
- Complex schemas and state machines: WIP, proforma, invoice, and AR objects have nuanced status transitions, approval routing, and posting rules
- eBilling nuances: LEDES variants, client portal idiosyncrasies, and resubmission workflows via eBillingHub require normalization and resilience
- Customizations: Firms customize fields, rate schemes, approval paths, and matter templates, integrations must adapt per environment
What a Elite/3E API Could Look Like
If Elite/3E exposed a modern, general-purpose API, the integration challenges above suggest what it would need to get right. This is a design sketch, not documentation of anything that exists today:
- First-class authentication: session handling with support for MFA and enterprise sign-on where the platform uses them
- Consistent resources: normalized JSON schemas and pagination across the platform's core objects
- Reliable writes: idempotency keys and validation that mirrors the platform's own workflow rules
- Entitlement awareness: endpoints scoped to what each customer's licensing actually permits
The endpoint sketches, technical requirements, and use cases below flesh out this hypothetical design.
Need This Kind of Access Today?
If your team needs this kind of access today, Supergood builds integrations on request, one customer at a time. We act at the direction of our customers, within the access they already hold. Customers bring their own accounts, licenses, and entitlements. If the vendor offers an official API, we highly recommend it.
- Schedule an Integration Assessment
A 30-minute session to review your product mix, licensing, and authentication model. - Scope the Integration
We design the access pattern around your workflows and entitlements. - Deploy with Monitoring
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Potential API Endpoints
Authentication
/auth/sessionsWould establish a session using credentials. Would return a short-lived auth token.
Authentication
/auth/sessions/refreshWould refresh an existing token to keep sessions uninterrupted.
Matters
/mattersWould create or upsert a matter record tied to a client, including billing arrangement and eBilling configuration.
Time Entries
/time-entriesWould create a time entry (WIP) with LEDES codes and narrative for a matter.
Proformas
/proformasWould generate a proforma (pre-bill) for a matter, optionally auto-finalizing to an invoice.
eBilling Submissions
/invoices/{invoiceId}/submit-ebillingWould submit a finalized invoice via eBillingHub to the client’s eBilling portal and track the status.
Use Cases
Matter and Case Synchronization
- Create or update matters and related client metadata - Align case-centric tools (ProLaw, MatterSphere) with 3E’s financial records - Keep responsible attorney, practice group, rate schemes, and custom fields in sync
Time Capture and WIP Management
- Push time and expense entries from your app or browser extension - Enforce LEDES phase/task/activity codes and billable flags - Retrieve WIP for review and forecasting
Proforma and Billing Automation
- Generate pre-bills by cycle or matter - Apply write-downs, merge/split line items, and route for approval - Finalize to invoices and trigger downstream eBilling
eBilling Submission and Status Tracking
- Submit LEDES invoices via eBillingHub to client portals (e.g., CounselLink, Legal Tracker) - Monitor acceptance, rejection reasons, and remittance messages - Automate resubmissions and exception handling
Payments and Collections
- Post client payments and allocate across invoices and phases - Surface payment plans via Elite Payments (formerly Tranch) - Drive AR dashboards and dunning workflows
Connect via No-Code Tools
Automate this platform from the no-code stack you already use.
Technical Requirements
Authentication
Would require username/password with MFA (SMS, email, TOTP) and where enabled; supports service accounts or customer-managed credentials
Response format
JSON with consistent resource schemas and pagination; LEDES-related metadata normalized
Rate limits
Tuned for enterprise throughput while honoring licensing, posting rules, and batch processing constraints
Session management
Would need automatic reauth and cookie/session rotation with health checks across multi-environment (on-prem/cloud) setups
Data freshness
Near real-time retrieval of WIP, proformas, invoice statuses, and eBilling events
Security
Encrypted transport, scoped tokens, and audit logging; respects 3E, 3E Essentials, and eBillingHub entitlements
Webhooks
Optional asynchronous delivery for long-running proforma generation and eBilling status updates
Latency
Design target: sub-second responses for list/detail queries; proforma generation and eBilling submissions run asynchronously
Throughput
Design target: designed for high-volume time capture and monthly billing cycles; supports batch operations with idempotency keys
Reliability
Retry logic, backoff, and idempotency minimize duplicate postings; resilient to eBillingHub and client portal hiccups
Versioning
Clear versioning and change management would matter as Elite/3E evolves
Frequently asked questions
Availability of official interfaces varies by product, plan, and licensing. Many platforms in this category gate access behind partner programs or paid modules, and there is often no broadly available, self-serve public API. Check the vendor's developer resources for current offerings.
The hard parts would be authentication (MFA, session management, enterprise controls), consistent schemas across the platform's products, and write semantics that reconcile the way the platform's own workflows do.
No. This page is an independent analysis by Supergood and is not affiliated with, sponsored by, or endorsed by the vendor. All product names and trademarks belong to their respective owners and are used for identification only. Nothing here documents an actual Elite/3E product or service.
Supergood acts at the direction of its customers, within the access those customers already have. We respect each customer's agreements with their software vendors, and how those agreements apply to a customer's use is a determination the customer makes. If the vendor offers an official API, we highly recommend it.
Supergood builds managed API access to enterprise software for customers on request, scoped to each customer's own licensing and entitlements. If your team needs programmatic access to a platform like this, schedule an integration assessment to discuss options.