Silverfin

Silverfin is a cloud connected-accounting platform for accountancy firms and finance teams that standardises and automates the financial close. It pulls ledger data from bookkeeping systems, runs working papers, reconciliations and analytical review through a Liquid-based templating language, and produces reports, PDF exports and compliance filings. Founded in Ghent, Belgium and now part of Visma, Silverfin exposes a v4 REST API plus a dedicated SyncAPI that let third-party bookkeeping software and integrators submit transactions, manage companies, periods and accounts, drive workflows, generate exports, and subscribe to webhooks — all over OAuth 2.0.

Silverfin publishes 1 API on the APIs.io network. Tagged areas include Company, Business Applications, Accounting, Financial Close, and Bookkeeping.

The Silverfin catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Silverfin’s developer surface includes documentation, API reference, getting-started guide, authentication, changelog, CLI, support, and 18 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.6/100 thin ▬ flat Agent 24/100 agent aware library Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

AccessSelf serve

1 APIs

Company Business Applications Accounting Financial Close Bookkeeping Reporting Compliance Fintech Software-as-a-Service Belgium

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 33.6/100 · thin

Contract Quality 8.3 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 4.2 / 11

Contract Governance 0.5 / 10

Discoverability 6.2 / 9

Regulatory Posture 4.0 / 15

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/silverfin: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Silverfin API v4

Silverfin's public v4 REST API and SyncAPI for accountancy automation: companies, periods, accounts, reconciliations, reports, adjustments, budgets, workflows, users, permanent ...

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Silverfin Webhooks

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Silverfin Authentication

oauth2 · 1 scheme

SECURITY

Silverfin Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Silverfin Scopes

19 scopes · authorizationCode

19 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Webhooks

DataModel

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

CLI

CLI

Packages

Packages

GitHubOrganization

GitHubOrganization

Postman

Postman

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

StatusPage

Deprecation

ChangeLog

Support

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: silverfin
name: Silverfin
description: Silverfin is a cloud connected-accounting platform for accountancy firms and finance teams that standardises
  and automates the financial close. It pulls ledger data from bookkeeping systems, runs working papers, reconciliations and
  analytical review through a Liquid-based templating language, and produces reports, PDF exports and compliance filings.
  Founded in Ghent, Belgium and now part of Visma, Silverfin exposes a v4 REST API plus a dedicated SyncAPI that let third-party
  bookkeeping software and integrators submit transactions, manage companies, periods and accounts, drive workflows, generate
  exports, and subscribe to webhooks — all over OAuth 2.0.
url: https://raw.githubusercontent.com/api-evangelist/silverfin/refs/heads/main/apis.yml
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://github.com/silverfin.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- index-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Business Applications
- Accounting
- Financial Close
- Bookkeeping
- Reporting
- Compliance
- Fintech
- Software-as-a-Service
- Belgium
tags_raw:
- Company
- Business Applications
- Accounting
- Financial Close
- Bookkeeping
- Reporting
- Compliance
- Fintech
- SaaS
- Belgium
apis:
- name: Silverfin API v4
  description: 'Silverfin''s public v4 REST API and SyncAPI for accountancy automation: companies, periods, accounts, reconciliations,
    reports, adjustments, budgets, workflows, users, permanent documents, exports, and bookkeeping transaction synchronisation.
    OAuth 2.0 with scoped access.'
  humanURL: https://developer.silverfin.com/reference
  baseURL: https://live.getsilverfin.com/api/v4
  properties:
  - type: Authentication
    url: authentication/silverfin-authentication.yml
  - type: OAuthScopes
    url: scopes/silverfin-scopes.yml
  - type: Conventions
    url: conventions/silverfin-conventions.yml
  - type: ErrorCatalog
    url: errors/silverfin-problem-types.yml
  - type: Lifecycle
    url: lifecycle/silverfin-lifecycle.yml
  - type: Webhooks
    url: asyncapi/silverfin-webhooks.yml
  - type: X-MCPServerCandidate
    url: mcp/silverfin-mcp.yml
    note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list
      derived from the published API contracts, not an existing server. The scorer already read the manifest and reported
      mcp_server correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
  - type: DataModel
    url: data-model/silverfin-data-model.yml
  - type: Conformance
    url: conformance/silverfin-conformance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://silverfin.com
- type: DeveloperPortal
  url: https://developer.silverfin.com
- type: Documentation
  url: https://developer.silverfin.com/docs/where-to-start
- type: APIReference
  url: https://developer.silverfin.com/reference
- type: GettingStarted
  url: https://developer.silverfin.com/reference/get-started-1
- type: Authentication
  url: authentication/silverfin-authentication.yml
- type: OAuthScopes
  url: scopes/silverfin-scopes.yml
- type: Conventions
  url: conventions/silverfin-conventions.yml
- type: ErrorCatalog
  url: errors/silverfin-problem-types.yml
- type: Lifecycle
  url: lifecycle/silverfin-lifecycle.yml
- type: StatusPage
  url: https://status.silverfin.com
- type: Deprecation
  url: https://developer.silverfin.com/docs/changelog
- type: ChangeLog
  url: changelog/silverfin-changelog.yml
- type: Webhooks
  url: asyncapi/silverfin-webhooks.yml
- type: X-MCPServerCandidate
  url: mcp/silverfin-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: CLI
  url: cli/silverfin-cli.yml
- type: Packages
  url: packages/silverfin-packages.yml
- type: DataModel
  url: data-model/silverfin-data-model.yml
- type: Conformance
  url: conformance/silverfin-conformance.yml
- type: LLMsTxt
  url: llms/silverfin-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: GitHubOrganization
  url: https://github.com/silverfin
- type: Postman
  url: https://developer.silverfin.com/reference/postman-library-setup
- type: Support
  url: https://community.silverfin.com
- type: DomainSecurity
  url: security/silverfin-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 19
  pass: local-v1

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