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

32.9/100 thin ▬ flat Agent 24/100 agent aware library Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

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 2026-09-08 · rubric v0.20.0

Composite quality — 32.9/100 · thin

Contract Quality 10.4 / 25

Developer Ergonomics 9.4 / 20

Access Clarity 0.0 / 20

Operational Transparency 5.0 / 13

Contract Governance 0.5 / 12

Discoverability 7.6 / 10

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

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.

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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