AppZen

AppZen is an AI platform for finance teams that automates accounts payable and expense auditing. Its Autonomous AP product ingests invoices, purchase orders, goods receipts and supporting master data, then applies AI to run validation checks, assign risk scores, and audit spend before payment. The public Autonomous AP REST API (Swagger 2.0, 54 operations) lets ERP and accounting systems such as SAP, Oracle, NetSuite, Coupa, Workday and Microsoft Dynamics push documents into AppZen and retrieve audit results. Authentication is via three API-key headers issued by AppZen Support, with US sandbox and production environments (EU coming soon).

AppZen publishes 19 APIs on the APIs.io network, including Chart of Accounts API, Custom Data Sets API, Documents API, and 16 more. Tagged areas include Company, Finance, Accounts Payable, Expense Management, and Invoice Processing.

AppZen’s developer surface includes authentication, sandbox, documentation, API reference, getting-started guide, support, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.2/100 thin ▬ flat Agent 33/100 agent aware Full breakdown ↓
scored 2026-08-10 · rubric v0.9.1

AccessSelf serve

19 APIs 1 MCP Servers

CompanyFinanceAccounts PayableExpense ManagementInvoice ProcessingSpend AuditArtificial IntelligenceERP Integration

Kin Score

Kin Score How this is scored →
scored 2026-08-10 · rubric v0.9.1

Composite quality — 40.2/100 · thin

Contract Quality 12.8 / 25

Developer Ergonomics 12.5 / 20

Commercial Clarity 4.2 / 20

Operational Transparency 0.0 / 13

Governance 1.4 / 12

Discoverability 9.3 / 10

Agent readiness — 33/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

MCP Server 12 / 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 0 / 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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/appzen: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 19

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Get Started 3

Portal, sign-up, and the first successful call

Sandbox

Sandbox

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

MCPServer

MCPServer

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Source (apis.yml)

aid: appzen
name: AppZen
description: AppZen is an AI platform for finance teams that automates accounts payable and expense auditing. Its Autonomous
  AP product ingests invoices, purchase orders, goods receipts and supporting master data, then applies AI to run validation
  checks, assign risk scores, and audit spend before payment. The public Autonomous AP REST API (Swagger 2.0, 54 operations)
  lets ERP and accounting systems such as SAP, Oracle, NetSuite, Coupa, Workday and Microsoft Dynamics push documents into
  AppZen and retrieve audit results. Authentication is via three API-key headers issued by AppZen Support, with US sandbox
  and production environments (EU coming soon).
url: https://raw.githubusercontent.com/api-evangelist/appzen/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
- bloomberg-beta
- lightspeed-venture-partners
- redpoint-ventures
x-tier: enriched
x-tier-reason: portfolio-lead
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
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
image: https://api-docs.appzen.com/img/appzen-logo.svg
tags:
- Company
- Finance
- Accounts Payable
- Expense Management
- Invoice Processing
- Spend Audit
- Artificial Intelligence
- ERP Integration
apis:
- aid: appzen:appzen-chart-of-accounts-api
  name: AppZen Chart of Accounts API
  description: The Chart of Accounts API from AppZen — 3 operation(s) for chart of accounts.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Chart of Accounts
  properties:
  - type: OpenAPI
    url: openapi/appzen-chart-of-accounts-api-openapi.yml
- aid: appzen:appzen-custom-data-sets-api
  name: AppZen Custom Data Sets API
  description: The Custom Data Sets API from AppZen — 3 operation(s) for custom data sets.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Custom Data Sets
  properties:
  - type: OpenAPI
    url: openapi/appzen-custom-data-sets-api-openapi.yml
- aid: appzen:appzen-documents-api
  name: AppZen Documents API
  description: The Documents API from AppZen — 1 operation(s) for documents.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/appzen-documents-api-openapi.yml
- aid: appzen:appzen-entities-api
  name: AppZen Entities API
  description: The Entities API from AppZen — 4 operation(s) for entities.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Entities
  properties:
  - type: OpenAPI
    url: openapi/appzen-entities-api-openapi.yml
- aid: appzen:appzen-externally-processed-invoices-api
  name: AppZen Externally Processed Invoices API
  description: The Externally Processed Invoices API from AppZen — 2 operation(s) for externally processed invoices.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Externally Processed Invoices
  properties:
  - type: OpenAPI
    url: openapi/appzen-externally-processed-invoices-api-openapi.yml
- aid: appzen:appzen-goods-receipt-api
  name: AppZen Goods Receipt API
  description: The Goods Receipt API from AppZen — 2 operation(s) for goods receipt.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Goods Receipt
  properties:
  - type: OpenAPI
    url: openapi/appzen-goods-receipt-api-openapi.yml
- aid: appzen:appzen-invoice-audit-results-api
  name: AppZen Invoice Audit Results API
  description: The Invoice Audit Results API from AppZen — 2 operation(s) for invoice audit results.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Invoice Audit Results
  properties:
  - type: OpenAPI
    url: openapi/appzen-invoice-audit-results-api-openapi.yml
- aid: appzen:appzen-invoice-status-sync-api
  name: AppZen Invoice Status Sync API
  description: The Invoice Status Sync API from AppZen — 1 operation(s) for invoice status sync.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Invoice Status Sync
  properties:
  - type: OpenAPI
    url: openapi/appzen-invoice-status-sync-api-openapi.yml
- aid: appzen:appzen-invoices-api
  name: AppZen Invoices API
  description: The Invoices API from AppZen — 3 operation(s) for invoices.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Invoices
  properties:
  - type: OpenAPI
    url: openapi/appzen-invoices-api-openapi.yml
- aid: appzen:appzen-lookup-item-api
  name: AppZen Lookup Item API
  description: The Lookup Item API from AppZen — 3 operation(s) for lookup item.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Lookup Item
  properties:
  - type: OpenAPI
    url: openapi/appzen-lookup-item-api-openapi.yml
- aid: appzen:appzen-lookup-table-api
  name: AppZen Lookup Table API
  description: The Lookup Table API from AppZen — 3 operation(s) for lookup table.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Lookup Table
  properties:
  - type: OpenAPI
    url: openapi/appzen-lookup-table-api-openapi.yml
- aid: appzen:appzen-payment-terms-api
  name: AppZen Payment Terms API
  description: The Payment Terms API from AppZen — 4 operation(s) for payment terms.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Payment Terms
  properties:
  - type: OpenAPI
    url: openapi/appzen-payment-terms-api-openapi.yml
- aid: appzen:appzen-processed-invoices-api
  name: AppZen Processed Invoices API
  description: The Processed Invoices API from AppZen — 1 operation(s) for processed invoices.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Processed Invoices
  properties:
  - type: OpenAPI
    url: openapi/appzen-processed-invoices-api-openapi.yml
- aid: appzen:appzen-purchase-orders-api
  name: AppZen Purchase Orders API
  description: The Purchase Orders API from AppZen — 4 operation(s) for purchase orders.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Purchase Orders
  properties:
  - type: OpenAPI
    url: openapi/appzen-purchase-orders-api-openapi.yml
- aid: appzen:appzen-suppliers-api
  name: AppZen Suppliers API
  description: The Suppliers API from AppZen — 4 operation(s) for suppliers.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Suppliers
  properties:
  - type: OpenAPI
    url: openapi/appzen-suppliers-api-openapi.yml
- aid: appzen:appzen-tax-master-api
  name: AppZen Tax Master API
  description: The Tax Master API from AppZen — 3 operation(s) for tax master.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Tax Master
  properties:
  - type: OpenAPI
    url: openapi/appzen-tax-master-api-openapi.yml
- aid: appzen:appzen-unit-of-measures-api
  name: AppZen Unit of Measures API
  description: The Unit of Measures API from AppZen — 3 operation(s) for unit of measures.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Unit of Measures
  properties:
  - type: OpenAPI
    url: openapi/appzen-unit-of-measures-api-openapi.yml
- aid: appzen:appzen-user-groups-api
  name: AppZen User Groups API
  description: The User Groups API from AppZen — 3 operation(s) for user groups.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - User Groups
  properties:
  - type: OpenAPI
    url: openapi/appzen-user-groups-api-openapi.yml
- aid: appzen:appzen-vat-api
  name: AppZen Vat API
  description: The Vat API from AppZen — 4 operation(s) for vat.
  humanURL: https://api-docs.appzen.com/
  baseURL: https://api.appzen.com/dictionary-data-services
  tags:
  - Vat
  properties:
  - type: OpenAPI
    url: openapi/appzen-vat-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/appzen-domain-security.yml
- type: Authentication
  url: authentication/appzen-authentication.yml
- type: Conventions
  url: conventions/appzen-conventions.yml
- type: ErrorCatalog
  url: errors/appzen-problem-types.yml
- type: Lifecycle
  url: lifecycle/appzen-lifecycle.yml
- type: Sandbox
  url: sandbox/appzen-sandbox.yml
- type: DataModel
  url: data-model/appzen-data-model.yml
- type: Conformance
  url: conformance/appzen-conformance.yml
- type: MCPServer
  url: mcp/appzen-mcp.yml
- type: LLMsTxt
  url: llms/appzen-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: DeveloperPortal
  url: https://api-docs.appzen.com/
- type: Documentation
  url: https://support.appzen.com/hc/en-us/categories/13996913056659-AppZen-REST-API
- type: APIReference
  url: https://api-docs.appzen.com/swagger/apis.html
- type: GettingStarted
  url: https://support.appzen.com/hc/en-us/articles/12682580110739-Introduction
- type: Support
  url: https://support.appzen.com/
- type: Blog
  url: https://www.appzen.com/blog
- type: TermsOfService
  url: https://www.appzen.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.appzen.com/privacy-policy-appzen
- type: Website
  url: https://appzen.com
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

AppZen

Kin Score

APIs 19

AppZen Chart of Accounts API

AppZen Custom Data Sets API

AppZen Documents API

AppZen Entities API

AppZen Externally Processed Invoices API

AppZen Goods Receipt API

AppZen Invoice Audit Results API

AppZen Invoice Status Sync API

AppZen Invoices API

AppZen Lookup Item API

AppZen Lookup Table API

AppZen Payment Terms API

AppZen Processed Invoices API

AppZen Purchase Orders API

AppZen Suppliers API

AppZen Tax Master API

AppZen Unit of Measures API

AppZen User Groups API

AppZen Vat API

MCP Servers 1

appzen-mcp.yml

Security Posture 2

Appzen Authentication

Appzen Domain Security

Resources