# Invoica

## Docs

- [Invoices](https://docs.invoica.ai/api-reference/invoices.md): Create, retrieve, and list invoices through the Invoica API.
- [API Overview](https://docs.invoica.ai/api-reference/overview.md): Base URL, versioning, error codes, and conventions for the Invoica API.
- [Settlements](https://docs.invoica.ai/api-reference/settlements.md): Monitor and verify on-chain payment settlements for your invoices.
- [Webhook Endpoints](https://docs.invoica.ai/api-reference/webhooks.md): API endpoints for managing webhook configurations.
- [Authentication](https://docs.invoica.ai/authentication.md): Learn how to authenticate with the Invoica API using API keys.
- [Invoice Middleware](https://docs.invoica.ai/concepts/invoice-middleware.md): How Invoica's middleware architecture intercepts x402 payments to add financial compliance.
- [PACT](https://docs.invoica.ai/concepts/pact.md): Mandate verification for autonomous agent payments — cryptographic spend authorization with hard caps, expiry, and an audit trail back to the human principal.
- [x402 Protocol](https://docs.invoica.ai/concepts/x402-protocol.md): Understanding the x402 payment protocol and how Invoica extends it with financial compliance.
- [Create Your First Invoice](https://docs.invoica.ai/guides/create-invoice.md): Step-by-step guide to creating and managing invoices with the Invoica API.
- [Tax Compliance](https://docs.invoica.ai/guides/tax-compliance.md): Configure automatic tax calculation for multi-jurisdiction compliance.
- [Webhooks](https://docs.invoica.ai/guides/webhooks.md): Receive real-time notifications when invoice events occur in your Invoica account.
- [Introduction](https://docs.invoica.ai/introduction.md): Invoica is the Financial OS for AI Agents — automated invoicing, tax compliance, and settlement detection built on the x402 protocol.
- [Quickstart](https://docs.invoica.ai/quickstart.md): Create your first Invoica invoice in under 5 minutes.
- [Installation](https://docs.invoica.ai/sdk/installation.md): Install and configure the Invoica SDK in your project.
- [SDK Overview](https://docs.invoica.ai/sdk/overview.md): The Invoica TypeScript SDK — 100 modules for building financial agent applications.

## OpenAPI Specs

- [openapi](https://docs.invoica.ai/api-reference/openapi.json)

## Optional

- [Status](https://invoica.ai/status)
- [Support](mailto:support@invoica.ai)