How to Use the JWT & Base64 Decoder MCP in AutoGen

Q: How do I configure JWT & Base64 Decoder in AutoGen?

Install autogen-extmcp and use mcpservertools with your MCP Server parameters. Pass the resulting tool list directly into your AssistantAgent constructor.

Q: Can multiple AutoGen agents use the JWT & Base64 Decoder?

Yes, any agent in the conversation group can call decodejwttoken or decodebase64string when they encounter encoded strings. This ensures all agents in the loop agree on the decoded data.

Q: Does this tool perform signature validation on JWTs?

No, decodejwttoken only extracts the header and payload data. It does not verify the cryptographic signature, so your agents should not treat a decoded token as cryptographically verified.

Let your AutoGen agents debate and verify JWT claims and Base64 data with absolute mathematical accuracy.

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Setup JWT & Base64 Decoder with AutoGen

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Multi-agent token analysis in AutoGen

`decode_jwt_token` parses raw JWT strings into JSON headers and payloads so your AutoGen agents can inspect them during a conversation. For example, a security agent can analyze the claims while a developer agent uses the scopes to configure a test environment. This tool calculates the exact expiration timestamp deterministically. Your agents can debate whether a token is expired or has incorrect privileges without guessing the math.

Base64 string decoding for agent debates

`decode_base64_string` translates encoded strings into UTF-8 text so your agents can read the actual content during their execution loop. If one agent receives a base64 payload from an external API, it calls this MCP tool to decode it before passing the plaintext to the next agent. This prevents agents from hallucinating the contents of the encoded string. It gives the entire group a single, accurate source of truth to work from.

Integrating this MCP Server into AutoGen workflows

This MCP Server exposes tools that fit directly into the Microsoft AutoGen multi-agent framework using the `autogen-ext[mcp]` package. The `McpToolAdapter` handles the schema translation automatically so your agents can invoke the tools natively. Whether you use stdio or Streamable HTTP, your agents get immediate access to deterministic parsing. This removes the need for custom Python execution blocks inside your agent system.

Setup guide

Set up JWT & Base64 Decoder MCP in AutoGen

Prerequisites

Python 3.10+ installed
autogen-ext[mcp] package
Active Vinkius subscription with a valid endpoint token

1

Install AutoGen with MCP
Run pip install "autogen-ext[mcp]" autogen-agentchat. The MCP extension includes mcp_server_tools for stateless tool access.
2

Fetch tools from the MCP
Call mcp_server_tools(SseServerParams(url=...)) with your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Run your agent
Pass the tools to AssistantAgent and call agent.run(). The agent invokes JWT & Base64 Decoder tools and returns structured results.

agent.py

from autogen_ext.tools.mcp import SseServerParams, mcp_server_tools
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient

server_params = SseServerParams(
    url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
)

tools = await mcp_server_tools(server_params)

agent = AssistantAgent(
    name="JWT & Base64 Decoder_assistant",
    model_client=OpenAIChatCompletionClient(model="gpt-4o"),
    tools=tools,
)

result = await agent.run("List recent JWT & Base64 Decoder data")
print(result.messages[-1].content)

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Prerequisites

Python 3.10+ installed
autogen-ext[mcp] + autogen-agentchat
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Same packages as above. McpWorkbench is ideal when your agent needs stateful sessions across multiple tool calls.
2

Use McpWorkbench as context manager
Wrap your agent in async with McpWorkbench(...) to maintain shared state and resources. The workbench manages the full MCP session lifecycle.
3

Run with workbench
Pass workbench=workbench to your agent. State is preserved across multiple tool calls within the same session.

agent.py

from autogen_ext.tools.mcp import McpWorkbench, SseServerParams
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient

server_params = SseServerParams(
    url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
)

async with McpWorkbench(server_params) as workbench:
    agent = AssistantAgent(
        name="JWT & Base64 Decoder_assistant",
        model_client=OpenAIChatCompletionClient(model="gpt-4o"),
        workbench=workbench,
    )

    result = await agent.run("List recent JWT & Base64 Decoder data")
    print(result.messages[-1].content)

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by JWT Decoder. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about JWT & Base64 Decoder MCP in AutoGen

Install `autogen-ext[mcp]` and use `mcp_server_tools` with your MCP Server parameters. Pass the resulting tool list directly into your `AssistantAgent` constructor.

Yes, any agent in the conversation group can call `decode_jwt_token` or `decode_base64_string` when they encounter encoded strings. This ensures all agents in the loop agree on the decoded data.

LLMs are bad at decoding raw bytes. By offloading the decoding to the server, your agents receive the exact JSON payload, ensuring their debates are based on real claims rather than hallucinated text.

No, `decode_jwt_token` only extracts the header and payload data. It does not verify the cryptographic signature, so your agents should not treat a decoded token as cryptographically verified.

All string and token inputs are processed entirely within a secure, ephemeral sandbox. The container is destroyed immediately after your AutoGen run, leaving zero logs or traces of your sensitive auth data.

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