chatgpt-api/docs/publishing/config/caching.mdx

---
title: Caching
description: Configure caching for your project's tools.
---

Opt-in to caching with familiar _cache-control_ and _stale-while-revalidate_ options. MCP tool calls include caching information in their _\_meta_ fields, providing parity with standard HTTP headers.

Agentic uses Cloudflare's global edge cache for caching, which guarantees unmatched global performance.

## Enabling Caching

You can enable caching for individual tools by setting [pure](/publishing/config/tool-config#param-pure) or [cacheControl](/publishing/config/tool-config#param-cache-control) on the tool's config. See [below](#examples) for examples.

## Cache Keys

Cache keys for tool calls are generated by normalizing the tool call's input, regardless of whether the tool call was made via `HTTP POST`, `HTTP GET`, or `MCP`.

Tool call args are hashed using a stable, deterministic JSON serialization algorithm, so tool calls with "identical" JSON inputs will have identical cache keys.

## Disabling Caching

Individual tool calls can disable caching by setting the standard `Cache-Control` header to `no-store` or `no-cache`.

<Note>
  Note that by default, caching is disabled for all tools. You must explicitly
  enable caching for each tool in your Agentic project config.
</Note>

## Examples

<Tabs>
<Tab title="Pure Tool">

```ts agentic.config.ts
import { defineConfig } from '@agentic/platform'

// In this example, `my-tool` is marked as pure which means its responses
// will be cached aggressively for identical requests using `cache-control`
// `public, max-age=31560000, s-maxage=31560000, stale-while-revalidate=3600`
export default defineConfig({
  // ...
  toolConfigs: [
    {
      name: 'my-tool',
      pure: true
    }
  ]
})
```

</Tab>

<Tab title="Custom Cache-Control">

```ts agentic.config.ts
import { defineConfig } from '@agentic/platform'

// In this example, `my-tool` is using a custom `Cache-Control` header to
// cache responses for 60 seconds.
export default defineConfig({
  // ...
  toolConfigs: [
    {
      name: 'my-tool',
      cacheControl: 'public, max-age=60, s-maxage=60 stale-while-revalidate=10'
    }
  ]
})
```

</Tab>

<Tab title="Disabling Caching">

```ts agentic.config.ts
import { defineConfig } from '@agentic/platform'

// In this example, `my-tool` results will never be cached.
// Note that this is the default behavior for all tools unless caching is
// explicitly enabled for a tool.
export default defineConfig({
  // ...
  toolConfigs: [
    {
      name: 'my-tool',
      cacheControl: 'no-cache'
    }
  ]
})
```

</Tab>

</Tabs>