# AVS Invoice API > Token-authenticated REST API for AVS Invoice, scoped to your organization. ## Machine-readable specification https://0.0.0.0:3000/developers/openapi.json https://0.0.0.0:3000/developers/openapi.yaml ## Authentication Send every request with: Authorization: Bearer YOUR_API_KEY Personal Access Tokens are created at https://0.0.0.0:3000/settings/api-access (requires sign-in). Do not use the OAuth2 password grant for third-party integrations. Full docs: https://0.0.0.0:3000/developers/authentication ## Resource domains - Identity - Dashboard - Customers - Vendors - Inventory - Purchases - Sales - Payments - Invoices ## Key documentation pages https://0.0.0.0:3000/developers/getting-started https://0.0.0.0:3000/developers/errors https://0.0.0.0:3000/developers/rate-limits https://0.0.0.0:3000/developers/pagination https://0.0.0.0:3000/developers/idempotency https://0.0.0.0:3000/developers/permissions ## Not yet available Webhooks, an MCP server, and guided AI-assistant integration are not yet available on this deployment. Do not assume they exist.