Definite

Definite provides an ontology layer for finance, connecting disparate financial systems, mapping data and relationships to give finance teams a unified context for dashboards, reconciliation, planning, billing, tax, and analytics. Backed by Y Combinator, it enables teams to turn operational finance into strategic insight through integrated workflows and APIs.

Definite is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Finance, Ontology, Integration, and SaaS.

The Definite catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Definite’s developer surface includes authentication, getting-started guide, documentation, support, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.3/100 thin Agent 22/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

2 APIs

Company Finance Ontology IntegrationSaaS

Kin Score

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

Composite quality — 31.3/100 · thin

Contract Quality 4.3 / 21

Developer Ergonomics 6.5 / 17

Access Clarity 5.8 / 17

Operational Transparency 1.7 / 11

Contract Governance 2.2 / 10

Discoverability 4.9 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 22/100 · 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 9 / 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 0 / 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):

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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 20.1 — up to +20.0 composite points
Access Clarity scores 34.2 — up to +13.2 composite points
Developer Ergonomics scores 38.1 — up to +12.4 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/usedefinite-com/apis.yml: open an issue on github.com/api-evangelist/usedefinite-com 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 2

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

Definite API

Definite provides APIs for its ontology platform, covering vault, ledger, decision streams, and other services.

Definite API

Definite API as documented publicly: 59 operations. Contract generated from the documentation by API Evangelist (2026-10-29); not the provider's own document.

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Usedefinite Com Context

2 classes · 8 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Definite API Rules

8 rules · 6 errors 1 warnings 1 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

PostV1ProgramsProgramidRunsRequest

7 properties

JSON SCHEMA

PostV1ProgramsProgramidRunsResponse

1 properties

JSON SCHEMA

Security Posture 2

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

Usedefinite Com Authentication

1 scheme

SECURITY

Usedefinite Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Idempotency

Conventions

Conformance

Scroll for all 7

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

Security

Security

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: usedefinite-com
name: Definite
image: https://www.usedefinite.com/opengraph-image
description: Definite provides an ontology layer for finance, connecting disparate financial systems, mapping data and relationships
  to give finance teams a unified context for dashboards, reconciliation, planning, billing, tax, and analytics. Backed by
  Y Combinator, it enables teams to turn operational finance into strategic insight through integrated workflows and APIs.
url: https://artifacts.apis.io/usedefinite-com/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
tags:
- Company
- Finance
- Ontology
- Integration
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/usedefinite-com-rules.yml
- type: JSONLD
  url: json-ld/usedefinite-com-context.jsonld
- type: Vocabulary
  url: vocabulary/usedefinite-com-vocabulary.yml
- type: DataModel
  url: data-model/usedefinite-com-data-model.yml
- type: Idempotency
  url: conventions/usedefinite-com-conventions.yml
- type: Conventions
  url: conventions/usedefinite-com-conventions.yml
- type: Authentication
  url: authentication/usedefinite-com-authentication.yml
- type: Conformance
  url: conformance/usedefinite-com-conformance.yml
- type: LLMsTxt
  url: llms/usedefinite-com-llms.txt
- type: Hosts
  url: hosts/usedefinite-com-hosts.yml
- type: Vendors
  url: vendors/usedefinite-com-vendors.yml
- type: Security
  url: https://www.usedefinite.com/security
- type: Login
  url: https://app.usedefinite.com/login
- type: GettingStarted
  url: https://docs.usedefinite.com/getting-started
- type: GitHubOrganization
  url: https://github.com/UseDefinite
- type: DomainSecurity
  url: security/usedefinite-com-domain-security.yml
- type: Website
  url: https://www.usedefinite.com
- type: Documentation
  url: https://www.usedefinite.com/about
- type: PrivacyPolicy
  url: https://www.usedefinite.com/privacy
- type: TermsOfService
  url: https://www.usedefinite.com/terms
- type: Support
  url: https://www.usedefinite.com/contact
apis:
- name: Definite API
  description: Definite provides APIs for its ontology platform, covering vault, ledger, decision streams, and other services.
  humanURL: https://docs.usedefinite.com/
  aid: usedefinite-com:definite-api
- aid: usedefinite-com:usedefinite-com-api
  name: Definite API
  description: 'Definite API as documented publicly: 59 operations. Contract generated from the documentation by API Evangelist
    (2026-10-29);

    not the provider''s own document.'
  humanURL: https://docs.usedefinite.com/api/vault
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/usedefinite-com-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/usedefinite-com-post-v1-programs-programid-runs-request-schema.json
  - type: JSONSchema
    url: json-schema/usedefinite-com-post-v1-programs-programid-runs-response-schema.json
x-backed-by:
- y-combinator
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Documentation pages exist but no OpenAPI, AsyncAPI, GraphQL, gRPC, or WSDL contracts were found.
  evidence:
  - url: https://docs.usedefinite.com/api/vault
    status: 200
  checked: '2026-10-29'
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Definite API — frequently asked questions

Does Definite have an API?

Yes. APIs.io lists 2 APIs from Definite, including Definite API and Definite API.

Is there an OpenAPI specification for the Definite API?

Yes. APIs.io indexes 1 OpenAPI specification for Definite, each linked for download from this page.

How do I authenticate with the Definite API?

Definite uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Usedefinite Com Authentication.

Is the Definite API ready for AI agents?

Definite has a Kin Score of 31.3 out of 100 (thin) and an Agent Readiness score of 21.5 (agent-aware), scored by API Evangelist on 2026-10-31.

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