Briefcase
Briefcase is an AI-native accounting and bookkeeping automation platform for UK accounting firms and businesses. Founded in 2024 in London by Reuben Steenkamp and Ján Stehlík, and backed by Earlybird Venture Capital, Entrepreneur First and Tiny, Briefcase describes itself as building the world's first AI autopilot for accounting firms. The product uses multimodal AI and agentic workflows to automate the most tedious parts of accounting: extracting data from invoices, receipts and bank statements, categorising transactions against a firm's chart of accounts, handling VAT (with embedded HMRC legislation for standard, reverse-charge and zero-rated VAT), automating prepayments and expense claims, and driving month-end and financial close. It publishes results into Xero and QuickBooks. Briefcase is delivered as a cloud SaaS application (app.briefcase.so); it is a consumer of accounting APIs rather than a public API producer, and at the time of this profile it publishes no developer/API documentation, OpenAPI, or SDKs.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Briefcase the way a machine reads it — 1 machine-readable artifact, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Briefcase scores 19.0/100 (emerging), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Briefcase
Each block below is one kind of artifact we hold for Briefcase. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Briefcase — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Access & Security 1
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/briefcase · machine-readable index on apis.io