> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fluffbuzz.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Vercel AI gateway

The [Vercel AI Gateway](https://vercel.com/ai-gateway) provides a unified API to
access hundreds of models through a single endpoint.

| Property      | Value                            |
| ------------- | -------------------------------- |
| Provider      | `vercel-ai-gateway`              |
| Auth          | `AI_GATEWAY_API_KEY`             |
| API           | Anthropic Messages compatible    |
| Model catalog | Auto-discovered via `/v1/models` |

<Tip>
  FluffBuzz auto-discovers the Gateway `/v1/models` catalog, so
  `/models vercel-ai-gateway` includes current model refs such as
  `vercel-ai-gateway/openai/gpt-5.5` and
  `vercel-ai-gateway/moonshotai/kimi-k2.6`.
</Tip>

## Getting started

<Steps>
  <Step title="Set the API key">
    Run onboarding and choose the AI Gateway auth option:

    ```bash theme={"theme":{"light":"min-light","dark":"min-dark"}}
    fluffbuzz onboard --auth-choice ai-gateway-api-key
    ```
  </Step>

  <Step title="Set a default model">
    Add the model to your FluffBuzz config:

    ```json5 theme={"theme":{"light":"min-light","dark":"min-dark"}}
    {
      agents: {
        defaults: {
          model: { primary: "vercel-ai-gateway/anthropic/claude-opus-4.6" },
        },
      },
    }
    ```
  </Step>

  <Step title="Verify the model is available">
    ```bash theme={"theme":{"light":"min-light","dark":"min-dark"}}
    fluffbuzz models list --provider vercel-ai-gateway
    ```
  </Step>
</Steps>

## Non-interactive example

For scripted or CI setups, pass all values on the command line:

```bash theme={"theme":{"light":"min-light","dark":"min-dark"}}
fluffbuzz onboard --non-interactive \
  --mode local \
  --auth-choice ai-gateway-api-key \
  --ai-gateway-api-key "$AI_GATEWAY_API_KEY"
```

## Model ID shorthand

FluffBuzz accepts Vercel Claude shorthand model refs and normalizes them at
runtime:

| Shorthand input                     | Normalized model ref                          |
| ----------------------------------- | --------------------------------------------- |
| `vercel-ai-gateway/claude-opus-4.6` | `vercel-ai-gateway/anthropic/claude-opus-4.6` |
| `vercel-ai-gateway/opus-4.6`        | `vercel-ai-gateway/anthropic/claude-opus-4-6` |

<Tip>
  You can use either the shorthand or the fully qualified model ref in your
  configuration. FluffBuzz resolves the canonical form automatically.
</Tip>

## Advanced configuration

<AccordionGroup>
  <Accordion title="Environment variable for daemon processes">
    If the FluffBuzz Gateway runs as a daemon (launchd/systemd), make sure
    `AI_GATEWAY_API_KEY` is available to that process.

    <Warning>
      A key set only in `~/.profile` will not be visible to a launchd/systemd
      daemon unless that environment is explicitly imported. Set the key in
      `~/.fluffbuzz/.env` or via `env.shellEnv` to ensure the gateway process can
      read it.
    </Warning>
  </Accordion>

  <Accordion title="Provider routing">
    Vercel AI Gateway routes requests to the upstream provider based on the model
    ref prefix. For example, `vercel-ai-gateway/anthropic/claude-opus-4.6` routes
    through Anthropic, while `vercel-ai-gateway/openai/gpt-5.5` routes through
    OpenAI and `vercel-ai-gateway/moonshotai/kimi-k2.6` routes through
    MoonshotAI. Your single `AI_GATEWAY_API_KEY` handles authentication for all
    upstream providers.
  </Accordion>
</AccordionGroup>

## Related

<CardGroup cols={2}>
  <Card title="Model selection" href="/concepts/model-providers" icon="layers">
    Choosing providers, model refs, and failover behavior.
  </Card>

  <Card title="Troubleshooting" href="/help/troubleshooting" icon="wrench">
    General troubleshooting and FAQ.
  </Card>
</CardGroup>