Introduction

When to use this pageCopy Anchor Link

Start here if you are new to EZAT Router, or if you need the base URLs and want to know which API format to use.

What EZAT Router isCopy Anchor Link

EZAT Router gives you leading AI models through one API key and one prepaid balance. You add credit in the dashboard, create a key, and point your tool or SDK at EZAT Router. Each request is paid from your balance for the tokens it uses. There is no subscription.

It speaks two API formats, with the same key and the same balance:

• Anthropic Messages API. For Claude Code, the Anthropic SDKs and anything else that speaks Anthropic's format. You change the base URL and the key, and keep your code.
• OpenAI Chat Completions API. For the OpenAI SDKs, Cursor, Cline, LangChain's OpenAI client and other tools that take an OpenAI base URL.

Models are served through Amazon Bedrock. See Models for the current list.

Base URLsCopy Anchor Link

Both accept your ezat_sk_… key in the x-api-key header or as Authorization: Bearer. See Authentication.

Which format to useCopy Anchor Link

For your own code, prefer the Anthropic format: requests reach the model as you send them. The OpenAI-compatible API translates each request into the Anthropic format and back, and refuses a few OpenAI fields that have no equivalent (see Chat Completions). The same conversation costs the same through either API.

Get an API keyCopy Anchor Link

1. Sign in at https://router.ezat.io. Signing in for the first time creates your account and your first organization.
2. Add credit on the Billing page.
3. Create a key on the API keys page and copy it. The full key is shown only once.

The Quickstart walks through each step and your first request.

How it worksCopy Anchor Link

1. Keys belong to an organization. Every key in an organization draws on that organization's balance. A person can be in several organizations, each with its own keys, balance and usage. See Organizations and members.
2. Each request is checked first. EZAT Router checks the key, the model, the key's limits and that the balance is above zero. A request that fails a check is refused and costs nothing.
3. Each request is billed per token. Input, output, cache-write and cache-read tokens are charged at the model's price (Pricing) and taken from the balance when the request finishes. A request that starts with a positive balance always finishes, so a balance can end slightly below zero. See How billing works.
4. Everything is on record, except your content. Usage shows every request with its model, tokens and cost. Prompts and responses are never stored or logged.

When you contact support at support@ezat.io, quote the response's request-id header, or x-request-id if there is no request-id. See Troubleshooting.

EZAT Router is an independent service. It isn't affiliated with or endorsed by Anthropic, OpenAI or Amazon Web Services, and model names belong to their owners.

Next stepsCopy Anchor Link

For AI agentsCopy Anchor Link

1. Anthropic-format base URL: https://api.router.ezat.io (no /v1). OpenAI-format base URL: https://api.router.ezat.io/openai/v1.
2. Send the key as x-api-key: $EZAT_API_KEY or Authorization: Bearer $EZAT_API_KEY. Read it from the EZAT_API_KEY environment variable; never ask the user to paste it into the chat.
3. List models with GET https://api.router.ezat.io/v1/models. Don't hard-code model lists or prices.
4. The index of every page is https://docs.router.ezat.io/llms.txt, and all pages in one file are at https://docs.router.ezat.io/llms-full.txt. Add .md to any page URL for its Markdown (https://docs.router.ezat.io/quickstart.md).
5. The API spec is https://docs.router.ezat.io/openapi.yaml.
6. For setup work, follow Notes for AI agents, or install the agent skill from https://docs.router.ezat.io/skill/ezat-router.zip.