Rillet
Rillet is an AI-native, cloud enterprise resource planning (ERP) and general-ledger platform built for modern finance teams. It automates core accounting workflows — general ledger, accounts receivable and payable, bank reconciliation, revenue and contract management, month-end close, and financial reporting — and layers on "Aura AI" for natural-language querying and workflow automation. The Rillet Accounting API (OpenAPI 3.1, 110 operations) exposes accounts, subsidiaries, customers, vendors, products, contracts, invoices, credit memos, bills, journal entries, bank accounts/transactions, reimbursements, and financial-statement reports, with bearer/OAuth2 auth, RFC 9457 errors, idempotency, keyset pagination, signed webhooks, and an official hosted MCP server. Rillet is backed by Creandum, First Round Capital, and ICONIQ.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Rillet the way a machine reads it — 64 machine-readable artifacts across 1 API, 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 — Rillet scores 47.5/100 (developing), with a separate agent-readiness read of 51/100 (agent native). 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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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How we profile Rillet
Each block below is one kind of artifact we hold for Rillet. 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.
APIs 29
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Rillet API Key API
The API Key API from Rillet — 1 operation(s) for api key.
Rillet Bank accounts API
The Bank accounts API from Rillet — 2 operation(s) for bank accounts.
Rillet Bank Transactions API
The Bank Transactions API from Rillet — 2 operation(s) for bank transactions.
Rillet Bill Payments API
The Bill Payments API from Rillet — 2 operation(s) for bill payments.
Rillet Bills API
The Bills API from Rillet — 2 operation(s) for bills.
Rillet Books periods API
The Books periods API from Rillet — 1 operation(s) for books periods.
Rillet Charges API
The Charges API from Rillet — 2 operation(s) for charges.
Rillet Chart of Accounts API
The Chart of Accounts API from Rillet — 1 operation(s) for chart of accounts.
Rillet Contract Items API
The Contract Items API from Rillet — 1 operation(s) for contract items.
Rillet Contracts API
The Contracts API from Rillet — 5 operation(s) for contracts.
Rillet Credit Memos API
The Credit Memos API from Rillet — 4 operation(s) for credit memos.
Rillet Customer Payments API
The Customer Payments API from Rillet — 1 operation(s) for customer payments.
Rillet Customers API
The Customers API from Rillet — 2 operation(s) for customers.
Rillet Draft Contracts API
The Draft Contracts API from Rillet — 2 operation(s) for draft contracts.
Rillet Fields API
The Fields API from Rillet — 4 operation(s) for fields.
Rillet Health API
The Health API from Rillet — 1 operation(s) for health.
Rillet Invoice payments API
The Invoice payments API from Rillet — 3 operation(s) for invoice payments.
Rillet Invoices API
The Invoices API from Rillet — 4 operation(s) for invoices.
Rillet Journal Entries API
The Journal Entries API from Rillet — 2 operation(s) for journal entries.
Rillet Organizations API
The Organizations API from Rillet — 1 operation(s) for organizations.
Rillet Products API
The Products API from Rillet — 2 operation(s) for products.
Rillet Reimbursements API
The Reimbursements API from Rillet — 2 operation(s) for reimbursements.
Rillet Reports API
The Reports API from Rillet — 7 operation(s) for reports.
Rillet Subsidiaries API
The Subsidiaries API from Rillet — 2 operation(s) for subsidiaries.
Rillet Tax rates API
The Tax rates API from Rillet — 1 operation(s) for tax rates.
Rillet Vendor Credit Applications API
The Vendor Credit Applications API from Rillet — 1 operation(s) for vendor credit applications.
Rillet Vendor Credits API
The Vendor Credits API from Rillet — 2 operation(s) for vendor credits.
Rillet Vendors API
The Vendors API from Rillet — 2 operation(s) for vendors.
Rillet Webhooks API
The Webhooks API from Rillet — 0 operation(s) for webhooks.
Scroll within the panel for all 29 ·
Open Collections 29
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONRillet Accounting API Key API
OPEN COLLECTIONRillet Accounting API Key Bank accounts API
OPEN COLLECTIONRillet Accounting API Key Bank Transactions API
OPEN COLLECTIONRillet Accounting API Key Bill Payments API
OPEN COLLECTIONRillet Accounting API Key Bills API
OPEN COLLECTIONRillet Accounting API Key Books periods API
OPEN COLLECTIONRillet Accounting API Key Charges API
OPEN COLLECTIONRillet Accounting API Key Chart of Accounts API
OPEN COLLECTIONRillet Accounting API Key Contract Items API
OPEN COLLECTIONRillet Accounting API Key Contracts API
OPEN COLLECTIONRillet Accounting API Key Credit Memos API
OPEN COLLECTIONRillet Accounting API Key Customer Payments API
OPEN COLLECTIONRillet Accounting API Key Customers API
OPEN COLLECTIONRillet Accounting API Key Draft Contracts API
OPEN COLLECTIONRillet Accounting API Key Fields API
OPEN COLLECTIONRillet Accounting API Key Health API
OPEN COLLECTIONRillet Accounting API Key Invoice payments API
OPEN COLLECTIONRillet Accounting API Key Invoices API
OPEN COLLECTIONRillet Accounting API Key Journal Entries API
OPEN COLLECTIONRillet Accounting API Key Organizations API
OPEN COLLECTIONRillet Accounting API Key Products API
OPEN COLLECTIONRillet Accounting API Key Reimbursements API
OPEN COLLECTIONRillet Accounting API Key Reports API
OPEN COLLECTIONRillet Accounting API Key Subsidiaries API
OPEN COLLECTIONRillet Accounting API Key Tax rates API
OPEN COLLECTIONRillet Accounting API Key Vendor Credit Applications API
OPEN COLLECTIONRillet Accounting API Key Vendor Credits API
OPEN COLLECTIONRillet Accounting API Key Vendors API
OPEN COLLECTIONScroll within the panel for all 29 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
Rillet MCP Server
Rillet's official remote MCP server exposes the same features as the Rillet Public API, letting AI assistants (Claude Desktop, Claude Code, Cursor) operate on a Rillet account. ...
MCP SERVEREvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Rillet Webhooks
ASYNCAPISecurity Posture 2
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.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Rillet — 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 5
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 7 ·
Access & Security 4
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 2
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/rillet · machine-readable index on apis.io
This is an independent, third-party profile of Rillet, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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