SingleFile

SingleFile is an AI-powered entity management and corporate compliance platform for corporations, law firms, and investment organizations. It automates business entity formation, EIN filing, annual report filing, registered agent services, UCC filings, and Corporate Transparency Act (BOI/FinCEN) reporting across all 52 US jurisdictions. The SingleFile External API (v1) exposes organizations, entities, contacts, jurisdictions, documents, orders, tasks, and filing schemas over a REST/JSON interface secured with OAuth 2.0 client credentials, with webhooks for real-time order, document, entity, jurisdiction, and task events. SingleFile is SOC 2 Type II certified.

SingleFile publishes 7 API contracts indexed on the APIs.io network, including Documents API, Entities API, Jurisdictions API, and 4 more. Tagged areas include Company, Compliance, Legal, Entity Management, and Corporate Compliance.

The SingleFile catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

SingleFile’s developer surface includes authentication, documentation, API reference, getting-started guide, engineering blog, signup flow, support, and 25 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

57.4/100 strong ▬ flat Agent 35/100 agent ready Front door AI 5/6 prominent Heartbeat 65/100 slowing saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessSelf serve

1 published contract 4 Agent Skills

Company Compliance Legal Entity ManagementCorporate ComplianceRegistered AgentBusiness FilingsRegulatory Webhook OAuth Authentication

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Corporate Governance

BC-110

EntitiesOrganizations

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 57.4/100 · strong

Contract Quality 10.6 / 19

Developer Ergonomics 8.5 / 15

Access Clarity 7.5 / 15

Operational Transparency 3.9 / 10

Contract Governance 2.9 / 9

Discoverability 5.5 / 8

Regulatory Posture 5.9 / 15

Create-or-Update Ergonomics 2.8 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 7 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 56.4 — up to +10.9 composite points
Access Clarity scores 50.0 — up to +10.0 composite points
Developer Ergonomics scores 56.5 — up to +8.7 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/singlefile/apis.yml: open an issue on github.com/api-evangelist/singlefile to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OAuth

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 7

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

SingleFile Documents API

Formation and compliance documents

SingleFile Entities API

Business entities — create, list, read, update, and their contacts, documents, jurisdictions, orders and tasks

SingleFile Jurisdictions API

Entity jurisdictions and DBAs across US states

SingleFile Orders API

Filing orders — create, place, update, and document-request driven order creation

SingleFile Organizations API

Organizations that own entities — CRUD plus contacts, documents, entities, orders and tasks

SingleFile Schemas API

JSON schemas for order payloads by entity_type, filing_type and jurisdiction

SingleFile Tasks API

Compliance tasks and deadlines

Scroll for all 7

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

SingleFile External API Documentation documents API

OPEN COLLECTION

SingleFile External API Documentation documents entities API

OPEN COLLECTION

SingleFile External API Documentation documents jurisdictions API

OPEN COLLECTION

SingleFile External API Documentation documents orders API

OPEN COLLECTION

SingleFile External API Documentation documents organizations API

OPEN COLLECTION

SingleFile External API Documentation documents schemas API

OPEN COLLECTION

SingleFile External API Documentation documents tasks API

OPEN COLLECTION

Scroll for all 7

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

File an annual report with SingleFile

AGENT SKILL

Form a business entity with SingleFile

AGENT SKILL

Manage entity documents with SingleFile

AGENT SKILL

File for an EIN with SingleFile

AGENT SKILL

Rate Limits 1

Documented rate limits and quota policies.

Singlefile Rate Limits

3 limits

RATE LIMITS

Event Specifications 1

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

SingleFile Webhooks

Webhook event surface for SingleFile. Endpoints are configured in Profile Settings > Webhook Settings; deliveries are HTTPS-only and retried with exponential backoff on 5xx.

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SingleFile API Rules

61 rules · 57 errors 2 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Singlefile Openapi Overlay

2 actions · update · singlefile-openapi.yml

DERIVED

Security Posture 3

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

Singlefile Authentication

oauth2 · 1 scheme

SECURITY

Singlefile Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Singlefile Trust Center

SOC 2 Type II

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Singlefile Scopes

2 scopes · clientCredentials

2 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Singlefile Agentic Access

50 operations · 25 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

AsyncAPI

AsyncAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Webhooks

Access & Security 5

Authentication, authorization, and security posture

TrustCenter

DomainSecurity

OAuthScopes

Authentication

Compliance

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

BlogRSS

BlogRSS

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: singlefile
name: SingleFile
description: SingleFile is an AI-powered entity management and corporate compliance platform for corporations, law firms,
  and investment organizations. It automates business entity formation, EIN filing, annual report filing, registered agent
  services, UCC filings, and Corporate Transparency Act (BOI/FinCEN) reporting across all 52 US jurisdictions. The SingleFile
  External API (v1) exposes organizations, entities, contacts, jurisdictions, documents, orders, tasks, and filing schemas
  over a REST/JSON interface secured with OAuth 2.0 client credentials, with webhooks for real-time order, document, entity,
  jurisdiction, and task events. SingleFile is SOC 2 Type II certified.
url: https://raw.githubusercontent.com/api-evangelist/singlefile/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- foundry-group
x-tier: enriched
x-tier-reason: api-surface-enriched
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Compliance
- Legal
- Entity Management
- Corporate Compliance
- Registered Agent
- Business Filings
- Regulatory
- Webhook
- OAuth
- Authentication
tags_raw:
- Company
- Compliance
- Legal
- Entity Management
- Corporate Compliance
- Registered Agent
- Business Filings
- Regulatory
- API
- Webhooks
- OAuth
- Authentication
apis:
- aid: singlefile:singlefile-documents-api
  name: SingleFile Documents API
  description: Formation and compliance documents
  humanURL: https://docs.singlefile.ai/
  baseURL: https://api.demo.singlefile.ai/external-api/v1
  tags:
  - Documents
  tags_raw:
  - documents
  properties:
  - type: OpenAPI
    url: openapi/singlefile-documents-api-openapi.yml
  - type: Documentation
    url: https://docs.singlefile.ai/
  - type: APIReference
    url: https://docs.singlefile.ai/reference/
  - type: GettingStarted
    url: https://docs.singlefile.ai/docs/getting-started
- aid: singlefile:singlefile-entities-api
  name: SingleFile Entities API
  description: Business entities — create, list, read, update, and their contacts, documents, jurisdictions, orders and tasks
  humanURL: https://docs.singlefile.ai/
  baseURL: https://api.demo.singlefile.ai/external-api/v1
  tags:
  - Entities
  tags_raw:
  - entities
  properties:
  - type: OpenAPI
    url: openapi/singlefile-entities-api-openapi.yml
  - type: Documentation
    url: https://docs.singlefile.ai/
  - type: APIReference
    url: https://docs.singlefile.ai/reference/
  - type: GettingStarted
    url: https://docs.singlefile.ai/docs/getting-started
- aid: singlefile:singlefile-jurisdictions-api
  name: SingleFile Jurisdictions API
  description: Entity jurisdictions and DBAs across US states
  humanURL: https://docs.singlefile.ai/
  baseURL: https://api.demo.singlefile.ai/external-api/v1
  tags:
  - Jurisdictions
  tags_raw:
  - jurisdictions
  properties:
  - type: OpenAPI
    url: openapi/singlefile-jurisdictions-api-openapi.yml
  - type: Documentation
    url: https://docs.singlefile.ai/
  - type: APIReference
    url: https://docs.singlefile.ai/reference/
  - type: GettingStarted
    url: https://docs.singlefile.ai/docs/getting-started
- aid: singlefile:singlefile-orders-api
  name: SingleFile Orders API
  description: Filing orders — create, place, update, and document-request driven order creation
  humanURL: https://docs.singlefile.ai/
  baseURL: https://api.demo.singlefile.ai/external-api/v1
  tags:
  - Order
  tags_raw:
  - orders
  properties:
  - type: OpenAPI
    url: openapi/singlefile-orders-api-openapi.yml
  - type: Documentation
    url: https://docs.singlefile.ai/
  - type: APIReference
    url: https://docs.singlefile.ai/reference/
  - type: GettingStarted
    url: https://docs.singlefile.ai/docs/getting-started
- aid: singlefile:singlefile-organizations-api
  name: SingleFile Organizations API
  description: Organizations that own entities — CRUD plus contacts, documents, entities, orders and tasks
  humanURL: https://docs.singlefile.ai/
  baseURL: https://api.demo.singlefile.ai/external-api/v1
  tags:
  - Organization
  tags_raw:
  - organizations
  properties:
  - type: OpenAPI
    url: openapi/singlefile-organizations-api-openapi.yml
  - type: Documentation
    url: https://docs.singlefile.ai/
  - type: APIReference
    url: https://docs.singlefile.ai/reference/
  - type: GettingStarted
    url: https://docs.singlefile.ai/docs/getting-started
- aid: singlefile:singlefile-schemas-api
  name: SingleFile Schemas API
  description: JSON schemas for order payloads by entity_type, filing_type and jurisdiction
  humanURL: https://docs.singlefile.ai/
  baseURL: https://api.demo.singlefile.ai/external-api/v1
  tags:
  - Schema
  tags_raw:
  - schemas
  properties:
  - type: OpenAPI
    url: openapi/singlefile-schemas-api-openapi.yml
  - type: Documentation
    url: https://docs.singlefile.ai/
  - type: APIReference
    url: https://docs.singlefile.ai/reference/
  - type: GettingStarted
    url: https://docs.singlefile.ai/docs/getting-started
- aid: singlefile:singlefile-tasks-api
  name: SingleFile Tasks API
  description: Compliance tasks and deadlines
  humanURL: https://docs.singlefile.ai/
  baseURL: https://api.demo.singlefile.ai/external-api/v1
  tags:
  - Task
  tags_raw:
  - tasks
  properties:
  - type: OpenAPI
    url: openapi/singlefile-tasks-api-openapi.yml
  - type: Documentation
    url: https://docs.singlefile.ai/
  - type: APIReference
    url: https://docs.singlefile.ai/reference/
  - type: GettingStarted
    url: https://docs.singlefile.ai/docs/getting-started
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://www.singlefile.ai/rss.xml
  type: BlogRSS
- type: CapabilityMap
  url: capabilities/singlefile-capability-edges.yml
  name: SingleFile Business Capability Map
- type: TrustCenter
  url: security/singlefile-trust-center.yml
- type: DomainSecurity
  url: security/singlefile-domain-security.yml
- type: AgenticAccess
  url: agentic-access/singlefile-agentic-access.yml
- type: OAuthScopes
  url: scopes/singlefile-scopes.yml
- type: Authentication
  url: authentication/singlefile-authentication.yml
- type: Website
  url: https://www.singlefile.ai
- type: DeveloperPortal
  url: https://docs.singlefile.ai/
- type: Documentation
  url: https://docs.singlefile.ai/
- type: APIReference
  url: https://docs.singlefile.ai/reference/
- type: GettingStarted
  url: https://docs.singlefile.ai/docs/getting-started
- type: Blog
  url: https://www.singlefile.ai/blog/
- type: SignUp
  url: https://www.singlefile.ai/get-started/
- type: Login
  url: https://app.singlefile.ai/
- type: TermsOfService
  url: https://www.singlefile.ai/terms-of-service/
- type: PrivacyPolicy
  url: https://www.singlefile.ai/privacy-policy/
- type: Support
  url: https://www.singlefile.ai/faqs/
- type: LLMsTxt
  url: llms/singlefile-llms.txt
- type: X-MCPServerCandidate
  url: mcp/singlefile-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: Overlay
  url: overlays/singlefile-openapi-overlay.yaml
- type: Conformance
  url: conformance/singlefile-conformance.yml
- type: Compliance
  url: https://www.singlefile.ai/
- type: ErrorCatalog
  url: errors/singlefile-error-codes.yml
- type: Lifecycle
  url: lifecycle/singlefile-lifecycle.yml
- type: Sandbox
  url: sandbox/singlefile-sandbox.yml
- type: Conventions
  url: conventions/singlefile-conventions.yml
- type: DataModel
  url: data-model/singlefile-data-model.yml
- type: RateLimits
  url: rate-limits/singlefile-rate-limits.yml
- type: AsyncAPI
  url: asyncapi/singlefile-webhooks-asyncapi.yml
- type: Webhooks
  url: asyncapi/singlefile-webhooks-asyncapi.yml
- type: AgentSkill
  url: skills/_index.yml
image: https://www.singlefile.ai/favicon.ico
rate_limits:
- name: user
  limit_count: 1000
  window: hour
- name: burst
  limit_count: 60
  window: minute
- name: anonymous
  limit_count: 100
  window: unspecified
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 22
  pass: local-v1

SingleFile API — frequently asked questions

Does SingleFile have an API?

Yes. APIs.io lists 7 APIs from SingleFile, including SingleFile Documents API, SingleFile Entities API and SingleFile Jurisdictions API, and 4 more.

Is there an OpenAPI specification for the SingleFile API?

Yes. APIs.io indexes 7 OpenAPI specifications for SingleFile, each linked for download from this page.

How do I authenticate with the SingleFile API?

SingleFile documents its authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Singlefile Authentication.

Is the SingleFile API ready for AI agents?

SingleFile has a Kin Score of 57.4 out of 100 (strong) and an Agent Readiness score of 34.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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