Timeslips API
Timeslips is a time and billing platform widely used by law firms and professional services organizations. This page is an independent design exercise that asks what a well-designed Timeslips 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 Timeslips 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 Timeslips 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 Timeslips?
Timeslips is a time and billing platform widely used by law firms and professional services organizations. It supports granular time and expense capture, flexible rate management, pre-bill review workflows, invoicing (including LEDES formats), payments, and trust/retainer accounting.
Core product areas include:
- Time & Expense Capture (slips, activity/task codes, timers)
- Rates & Billing Arrangements (hourly, flat fee, contingency, custom rates by timekeeper/matter)
- Pre-Bill Review & Adjustments (write-downs, narratives, approvals)
- Invoicing & E-Billing (PDF and LEDES 1998B exports, email delivery)
- Payments & Trust/Retainer (receipts, trust transfers, allocations)
- Reporting & Analytics (realization, utilization, WIP, A/R, profitability)
- Integrations (accounting systems, document management workflows)
An API for a platform like this would naturally organize around its core data entities:
- Clients (organizations/individuals, billing profile, contacts)
- Matters/Projects (client, responsible attorney, billing arrangement, rates, status)
- Timekeepers (attorneys/staff, roles, default rates)
- Slips (time and expense entries with codes, rates, amounts, billable flags)
- Activity & Task Codes (standardized classification for work performed)
- Billing Cycles & Pre-Bills (grouped WIP for review and approval)
- Invoices (finalized bills, formats, delivery status)
- Payments & Trust Accounts (receipts, transfers, balances)
- Users/Roles (permissions, approval rights)
- Audit Events (who changed what, when)
The Timeslips Integration Challenge
Law firms rely on Timeslips daily, but turning its desktop- and portal-centric workflows into API-driven automation presents challenges:
- Data modeling complexity: Rate hierarchies (timekeeper/matter/client), billing arrangements, and write-downs must be applied consistently during calculation.
- Pre-bill lifecycle: WIP collection, narrative edits, approvals, and adjustments span hours to days and require asynchronous handling and auditability.
- E-billing formats: LEDES field mapping, task/activity code sets, and client-specific requirements need normalization to avoid rejection.
- Trust & payments: Retainer balances, allocations to invoices, and split payments need accurate sequencing and safeguards.
- DMS alignment: Mapping matters and documents between Timeslips and iManage workspaces requires reliable identifiers and cross-system references.
- Authentication & sessions: Headless automation must maintain secure sessions and respect role-based permissions and approvals.
What a Timeslips API Could Look Like
If Timeslips 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 sections below flesh out this hypothetical design.
How AI agents could connect to software like Timeslips: MCP servers for software without a public API →
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
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Use Cases
iManage-Driven Time Capture
- Create time slips from document and email activity in iManage (open, edit, send events) - Apply matter-level rates and activity/task codes automatically - Tag slips with iManage workspace/document references for auditability
Pre-Bill Review & Approval Sync
- Generate pre-bills for selected matters on a schedule - Sync pre-bill queues and approval states to your workflow tool - Apply write-downs and narrative edits programmatically and capture rationale
LEDES & Invoice Delivery
- Finalize approved pre-bills into invoices across clients - Export PDF and LEDES 1998B files and deliver via email - Attach finalized invoices back into the appropriate iManage workspace
Trust & Payment Automation
- Record payments and allocate retainer balances to open invoices - Enforce sequencing rules and prevent over-application - Feed A/R and realization metrics into your analytics layer
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Technical Requirements
Authentication
Would require username/password with support for service accounts or customer-managed credentials; sessions refreshed automatically
Response format
JSON with consistent resource schemas and pagination across modules
Rate limits
Tuned for firm-wide throughput while honoring customer entitlements and usage controls
Session management
Would need automatic reauth and session rotation with health checks
Data freshness
Near real-time retrieval of matters, slips, pre-bills, invoices, and payments
Security
Encrypted transport, scoped tokens, and audit logging; respects Timeslips role-based permissions and approvals
Webhooks
Optional asynchronous delivery for long-running workflows (e.g., billing batch generation, invoice delivery status)
E-billing
LEDES 1998B export support with configurable task/activity mappings
Latency
Design target: sub-second responses for list/detail queries; batch pre-bill generation reflects underlying platform behavior
Throughput
Design target: designed for high-volume slip ingestion and billing cycle synchronization
Reliability
Retry logic, backoff, and idempotency keys minimize duplicates and support at-least-once processing
Versioning
Clear versioning and change management would matter as Timeslips 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 Timeslips 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.