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The AI SDK adapter allows you to use AgentMark prompts with Vercel AI SDK’s generation functions. This is the recommended adapter for most TypeScript/JavaScript applications. AgentMark provides two versions of this adapter — one for AI SDK v4 and one for AI SDK v5. Both share the same API surface (VercelAIModelRegistry, createAgentMarkClient), so switching between them only requires changing the package import.

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Choosing a Version

AI SDK v4 AdapterAI SDK v5 Adapter
Package@agentmark-ai/ai-sdk-v4-adapter@agentmark-ai/ai-sdk-v5-adapter
AI SDK peerai ^4.0.0ai ^5.0.52
MCP importsBuilt into ai packageSeparate @ai-sdk/mcp peer dependency
Tool definitionparameters fieldinputSchema field (wrapped via jsonSchema)
StatusStable — use if your project is on AI SDK v4Recommended — use for new projects
If you’re starting a new project, use the v5 adapter. The v4 adapter is provided for projects that haven’t yet upgraded to AI SDK v5.

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Installation

Install the adapter, the ai core package, and the provider package(s) for the models you want to use. Provider packages must be compatible with your ai core version.

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Setup

Create your AgentMark client with a model registry. Use .registerModels() to map model names to AI SDK provider instances — supports exact names or regex patterns:
agentmark.client.ts
import { createAgentMarkClient, VercelAIModelRegistry } from "@agentmark-ai/ai-sdk-v5-adapter";
import { anthropic } from "@ai-sdk/anthropic";
import { openai } from "@ai-sdk/openai";

const modelRegistry = new VercelAIModelRegistry()
  .registerModels(["claude-3-5-sonnet-20241022"], (name) => anthropic(name))
  .registerModels(["gpt-4o", "gpt-4o-mini"], (name) => openai(name))
  .registerModels([/^gpt-/], (name) => openai(name)); // regex pattern

export const client = createAgentMarkClient({
  loader: fileLoader,
  modelRegistry,
});
The setup is identical — only the import path changes.

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Running Prompts

Load and run prompts with generateText(): 
import { client } from "./agentmark.client";
import { generateText } from "ai";

const prompt = await client.loadTextPrompt("greeting.prompt.mdx");
const input = await prompt.format({
  props: { name: "Alice" },
});

const result = await generateText(input);
console.log(result.text);

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Object Generation

For structured output, use generateObject(): 
import { client } from "./agentmark.client";
import { generateObject } from "ai";
import { z } from "zod";

const prompt = await client.loadObjectPrompt("extract.prompt.mdx", {
  schema: z.object({
    sentiment: z.enum(["positive", "negative", "neutral"]),
    confidence: z.number(),
  }),
});

const input = await prompt.format({
  props: { text: "This product is amazing!" },
});

const result = await generateObject(input);
console.log(result.object);
// { sentiment: 'positive', confidence: 0.95 }

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Streaming

Stream responses for real-time output with streamText or streamObject: 
import { streamText } from "ai";

const prompt = await client.loadTextPrompt("story.prompt.mdx");
const input = await prompt.format({
  props: { topic: "space exploration" },
});

const result = streamText(input);

for await (const chunk of result.textStream) {
  process.stdout.write(chunk);
}
For streaming structured objects: 
import { streamObject } from "ai";

const prompt = await client.loadObjectPrompt("extract.prompt.mdx", {
  schema: z.object({ summary: z.string(), tags: z.array(z.string()) }),
});

const input = await prompt.format({ props: { text: "..." } });
const result = streamObject(input);

for await (const partial of result.partialObjectStream) {
  console.log(partial);
}

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Image Generation

Generate images using experimental_generateImage: 
import { experimental_generateImage } from "ai";

const prompt = await client.loadImagePrompt("avatar.prompt.mdx");
const input = await prompt.format({
  props: { description: "A futuristic city skyline" },
});

const result = await experimental_generateImage(input);

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Speech Generation

Generate speech using experimental_generateSpeech: 
import { experimental_generateSpeech } from "ai";

const prompt = await client.loadSpeechPrompt("narration.prompt.mdx");
const input = await prompt.format({
  props: { text: "Welcome to AgentMark." },
});

const result = await experimental_generateSpeech(input);

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Tools

Configure tools using the AI SDK’s native tool() helper:
agentmark.client.ts
import { createAgentMarkClient, VercelAIModelRegistry } from "@agentmark-ai/ai-sdk-v5-adapter";
import { tool } from "ai";
import { z } from "zod";

const weatherTool = tool({
  description: "Get current weather for a location",
  parameters: z.object({
    location: z.string(),
  }),
  execute: async ({ location }) => {
    return `The weather in ${location} is sunny and 72°F`;
  },
});

export const client = createAgentMarkClient({
  loader: fileLoader,
  modelRegistry,
  tools: { weather: weatherTool },
});
Then reference tools in your prompts:
weather.prompt.mdx
---
name: weather
text_config:
  model_name: claude-3-5-sonnet-20241022
  tools:
    - weather
---

<System>You are a helpful weather assistant.</System>
<User>What's the weather in {props.location}?</User>

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MCP Servers

AgentMark supports Model Context Protocol servers for extended capabilities. Configure both stdio and URL-based servers:
agentmark.client.ts
import { createAgentMarkClient, VercelAIModelRegistry } from "@agentmark-ai/ai-sdk-v5-adapter";

export const client = createAgentMarkClient({
  loader: fileLoader,
  modelRegistry,
  mcpServers: {
    filesystem: {
      command: "npx",
      args: ["-y", "@modelcontextprotocol/server-filesystem", "/path/to/files"],
    },
    remote: {
      url: "https://mcp.example.com/sse",
    },
  },
});
The v5 adapter imports MCP support from @ai-sdk/mcp (installed separately).

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Observability

Enable telemetry to track performance and debug issues: 
const input = await prompt.format({
  props: { name: "Alice" },
  telemetry: {
    isEnabled: true,
    functionId: "greeting-handler",
    metadata: {
      userId: "user-123",
      sessionId: "session-abc",
    },
  },
});

const result = await generateText(input);
Learn more in the Observability documentation.

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Migrating from v4 to v5

If you’re upgrading from the v4 adapter to v5:
  1. Update packages — upgrade the adapter, ai core, provider packages, and add MCP if needed: 
    npm uninstall @agentmark-ai/ai-sdk-v4-adapter
npm install @agentmark-ai/ai-sdk-v5-adapter ai@^5 @ai-sdk/mcp

# Also upgrade your provider packages to v5-compatible versions
npm install @ai-sdk/openai@latest @ai-sdk/anthropic@latest
  2. Update imports — change the package path in your agentmark.client.ts: 
    // Before
import { createAgentMarkClient, VercelAIModelRegistry } from "@agentmark-ai/ai-sdk-v4-adapter";
// After
import { createAgentMarkClient, VercelAIModelRegistry } from "@agentmark-ai/ai-sdk-v5-adapter";
  3. No other changes required — the VercelAIModelRegistry and createAgentMarkClient APIs are the same. Tools and MCP servers are passed as plain objects. All prompt .format() calls and AI SDK generation functions (generateText, generateObject, streamText, etc.) remain identical.

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Next Steps

Prompts

Learn about prompt syntax

Testing

Test your prompts with datasets

Observability

Monitor your prompts in production

Other Integrations

Explore other AI frameworks

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Have Questions?

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