# AppZen

> AppZen is an AI platform for finance teams that automates accounts payable (Autonomous AP) and expense auditing. Its public Autonomous AP REST API lets ERP and accounting systems (SAP, Oracle, NetSuite, Coupa, Workday, Microsoft Dynamics) push invoices, purchase orders, goods receipts and master data into AppZen for automated processing, risk scoring and audit.

This llms.txt was generated by the API Evangelist enrichment pipeline from the provider's public developer surface; it is not published by AppZen.

## APIs

- [Autonomous AP API (Swagger 2.0)](https://api-docs.appzen.com/swagger/apis.html): 54 operations across invoices, purchase orders, goods receipts, suppliers, entities, chart of accounts, tax, VAT, payment terms, units of measure, lookups and user groups. Auth: API-key headers (x-api-key, customer-id, customer-key).

## Specs

- [OpenAPI/Swagger 2.0 spec](https://api-docs.appzen.com/swagger/yaml/data-services-external-api-spec-v1-current.yaml)

## Docs

- [API documentation home](https://api-docs.appzen.com/)
- [API guidelines (auth headers, rate limits, correlation id)](https://api-docs.appzen.com/api_guidelines.html)
- [Environments (sandbox / production)](https://api-docs.appzen.com/environments.html)
- [Authentication overview](https://support.appzen.com/hc/en-us/articles/12905088759571-Authentication-Overview)
- [REST API support portal](https://support.appzen.com/hc/en-us/categories/13996913056659-AppZen-REST-API)
- [Integrations](https://www.appzen.com/integrations)

## Conventions

- Auth: three API-key headers issued by AppZen Support — x-api-key, customer-id, customer-key.
- Rate limits: 1,000 requests/second and 300,000 requests/day; HTTP 429 on breach.
- Tracing: every response returns an x-correlation-id header.
- Errors: custom JSON envelope {timestamp, status, error, message} (not RFC 9457).
- Environments: Sandbox US https://api.us.sandbox.appzen.com, Production US https://api.appzen.com (base path /dictionary-data-services).

## Company

- [Website](https://appzen.com)
- [Blog](https://www.appzen.com/blog)
- [Terms of Service](https://www.appzen.com/terms-of-service)
- [Privacy Policy](https://www.appzen.com/privacy-policy-appzen)