# Apidoor Documentation

Apidoor helps API sellers put API keys, request limits, request forwarding, and usage visibility in front of an existing API.

> These guides describe Apidoor V1. Use them as the source of truth for seller setup, supported behavior, and service boundaries.

## Getting started

- [Quickstart](/docs/quickstart.md): Create a project and API key, protect your upstream, and send your first request through Apidoor.
- [Core concepts](/docs/core-concepts.md): Understand sellers, customers, projects, upstream APIs, API keys, limits, and recorded request events.
- [Plans and billing](/docs/plans-and-billing.md): Compare V1 plan allowances, retained usage history, and the controls included with each plan.

## Configure Apidoor

- [API subscriptions and customer portal](/docs/api-subscriptions.md): Create monthly API plans and manage customer access, payments, keys, and subscription support.
- [Projects and upstreams](/docs/projects-and-upstreams.md): Configure a project gateway, its public HTTPS upstream, and origin verification.
- [Customers](/docs/customers.md): Create simple customer records and use them to attribute API-key activity.
- [API keys](/docs/api-keys.md): Create customer credentials, control their status, and manage request limits.
- [Access controls and delivery](/docs/access-controls.md): Configure browser origins, webhooks, route rules, access labels, and a custom gateway domain.

## Use the gateway

- [Send requests](/docs/send-requests.md): Authenticate gateway requests and understand how URLs, bodies, headers, and responses are forwarded.
- [Request limits](/docs/request-limits.md): Understand seller, customer, key, and grace allowances, per-minute limits, and gateway limit responses.

## Understand usage

- [Usage](/docs/usage.md): Read retained request history, customer and key activity, endpoints, failures, latency, and CSV exports.

## Help

- [Troubleshooting](/docs/troubleshooting.md): Diagnose current gateway errors, missing usage events, and upstream verification failures.
- [Service boundaries](/docs/service-boundaries.md): Review V1 product boundaries, propagation behavior, credential limits, and upstream safety checks.

## Optional

- [Complete documentation](/llms-full.txt): All Apidoor V1 seller guides in one file.

- [Terms and Conditions](https://apidoor.io/terms): Terms governing Apidoor accounts, subscriptions, seller responsibilities, gateway use, and service limits.