Proper

Proper provides a modern financial data platform that automates reconciliation, streamlines accounting processes, and offers a suite of products including Reconciliation, Exception Management, Connections, Financial Data Platform, and Ledgers. The platform simplifies financial data integration for businesses and offers product guides and API reference for developers.

Proper is listed with 1 API on the APIs.io network. Tagged areas include Finance, Reconciliation, API, Platform, and SaaS.

Proper’s developer surface includes documentation, engineering blog, getting-started guide, support, and 6 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

12.9/100 emerging Agent 0/100 human only Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Finance ReconciliationAPIPlatformSaaS

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 12.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.9 / 17

Access Clarity 0.0 / 17

Operational Transparency 1.2 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.4 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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

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/.

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

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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

13 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 28.6 — up to +14.3 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/properfinance-io/apis.yml: open an issue on github.com/api-evangelist/properfinance-io 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 →

APIs 1

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

Proper API

Automated Reconciliation and Financial Operations Platform

Security Posture 2

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

Properfinance Io Authentication

0 schemes

SECURITY

Properfinance Io Domain Security

TLSv1.3 · HSTS

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Properfinance Io Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Security

Security

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

SignIn

SignIn

Source (apis.yml)

aid: properfinance-io
name: Proper
description: Proper provides a modern financial data platform that automates reconciliation, streamlines accounting processes,
  and offers a suite of products including Reconciliation, Exception Management, Connections, Financial Data Platform, and
  Ledgers. The platform simplifies financial data integration for businesses and offers product guides and API reference for
  developers.
url: https://artifacts.apis.io/properfinance-io/apis.yml
image: https://cdn.prod.website-files.com/61b259caf730d7d8455895a1/642db0ee5fe941124de69405_home%20open%20graph%201.png
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Finance
- Reconciliation
- API
- Platform
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Hosts
  url: hosts/properfinance-io-hosts.yml
- type: Vendors
  url: vendors/properfinance-io-vendors.yml
- type: Documentation
  url: https://docs.properfinance.io/
- type: DomainSecurity
  url: security/properfinance-io-domain-security.yml
- type: Website
  url: https://www.properfinance.io/
- type: Blog
  url: https://www.properfinance.io/blog
- type: Security
  url: https://www.properfinance.io/platform/security
- type: GettingStarted
  url: https://www.properfinance.io/platform/how-it-works
- type: Support
  url: https://www.properfinance.io/platform/security
- type: SignIn
  url: https://app.properfinance.io
apis:
- name: Proper API
  description: Automated Reconciliation and Financial Operations Platform
  humanURL: https://www.properfinance.io/
  aid: properfinance-io:properfinance-api
x-backed-by:
- redpoint-ventures
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: The provider's website offers no public API documentation or machine‑readable contract.
  evidence:
  - url: https://www.properfinance.io/
    status: 200
  checked: '2026-10-29'
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 18
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Proper API — frequently asked questions

Does Proper have an API?

Yes. APIs.io lists 1 API from Proper, including Proper API.

How do I authenticate with the Proper API?

Proper documents its authentication (0 schemes). The details are profiled on APIs.io as Properfinance Io Authentication.

Is the Proper API ready for AI agents?

Proper has a Kin Score of 12.9 out of 100 (emerging) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-10-31.

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find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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