# List available tools in an AgentCore gateway
<a name="gateway-using-mcp-list"></a>

To list all available tools that an AgentCore gateway provides, make a POST request to the gateway’s MCP endpoint and specify `tools/list` as the method in the request body:

**Example**  

```
POST /mcp HTTP/1.1
Host: ${GatewayEndpoint}
Accept: application/json, text/event-stream
Content-Type: application/json
Authorization: ${Authorization header}
MCP-Protocol-Version: ${McpProtocolVersion}

${RequestBody}
```
On version `2026-07-28`, each request carries the `MCP-Protocol-Version` header, the `Mcp-Method` request-metadata header, and the `_meta` version fields in the body.  

```
POST /mcp HTTP/1.1
Host: ${GatewayEndpoint}
Accept: application/json, text/event-stream
Content-Type: application/json
Authorization: ${Authorization header}
MCP-Protocol-Version: 2026-07-28
Mcp-Method: tools/list

${RequestBody}
```

**Note**  
The gateway accepts only the MCP protocol versions listed in the `supportedVersions` field of its `protocolConfiguration.mcp` configuration. To use version `2026-07-28`, make sure that your gateway’s `supportedVersions` includes it. You can change the supported versions with the [UpdateGateway](https://docs.aws.amazon.com/bedrock-agentcore-control/latest/APIReference/API_UpdateGateway.html) API.

Replace the following values:
+  `${GatewayEndpoint}` – The URL of the gateway, as provided in the response of the [CreateGateway](https://docs.aws.amazon.com/bedrock-agentcore-control/latest/APIReference/API_CreateGateway.html) API.
+  `${Authorization header}` – The authorization credentials from the identity provider when you set up [inbound authorization](gateway-inbound-auth.md).
+  `${McpProtocolVersion}` – The MCP protocol version for the request, such as `2025-11-25`. The version must be one that your gateway supports.
+  `${RequestBody}` – The JSON payload of the request body, as specified in [Listing tools](https://modelcontextprotocol.io/specification/2025-06-18/server/tools#listing-tools) in the [Model Context Protocol (MCP)](https://modelcontextprotocol.io/docs/getting-started/intro) . Include `tools/list` as the `method`. On version `2026-07-28`, also include the `_meta` version fields in `params`.

**Note**  
For a list of optionally supported parameters for `tools/list` , see the `params` object in the request body at [Tools](https://modelcontextprotocol.io/specification/2025-06-18/server/tools) in the [Model Context Protocol documentation](https://modelcontextprotocol.io/specification/2025-06-18) . At the top of the page next to the search bar, you can select the MCP version whose documentation you want to view. Make sure that the version is one [supported by Amazon Bedrock AgentCore](gateway-using.md).

The response returns a list of available tools with their names, descriptions, and parameter schemas.

## Code samples for listing tools
<a name="gateway-using-mcp-list-examples"></a>

To see examples of listing available tools in the gateway, select one of the following methods:

**Example**  
Set the `MCP-Protocol-Version` header to a version that your gateway supports.  

```
import requests
import json

def list_tools(gateway_url, access_token):
    headers = {
        "Content-Type": "application/json",
        "Authorization": f"Bearer {access_token}",
        "MCP-Protocol-Version": "2025-11-25"
    }

    payload = {
        "jsonrpc": "2.0",
        "id": "list-tools-request",
        "method": "tools/list"
    }

    response = requests.post(gateway_url, headers=headers, json=payload)
    return response.json()

# Example usage
gateway_url = "https://${GatewayEndpoint}/mcp" # Replace with your actual gateway endpoint
access_token = "${AccessToken}" # Replace with your actual access token
tools = list_tools(gateway_url, access_token)
print(json.dumps(tools, indent=2))
```
On version `2026-07-28`, add the `MCP-Protocol-Version` and `Mcp-Method` headers, and include the `_meta` version fields in the request body. Your gateway’s `supportedVersions` must include `2026-07-28`.  

```
import requests
import json

def list_tools(gateway_url, access_token):
    headers = {
        "Content-Type": "application/json",
        "Authorization": f"Bearer {access_token}",
        "MCP-Protocol-Version": "2026-07-28",
        "Mcp-Method": "tools/list"
    }

    payload = {
        "jsonrpc": "2.0",
        "id": "list-tools-request",
        "method": "tools/list",
        "params": {
            "_meta": {
                "io.modelcontextprotocol/protocolVersion": "2026-07-28",
                "io.modelcontextprotocol/clientInfo": {"name": "my-agent", "version": "1.0.0"},
                "io.modelcontextprotocol/clientCapabilities": {}
            }
        }
    }

    response = requests.post(gateway_url, headers=headers, json=payload)
    return response.json()

# Example usage
gateway_url = "https://${GatewayEndpoint}/mcp" # Replace with your actual gateway endpoint
access_token = "${AccessToken}" # Replace with your actual access token
tools = list_tools(gateway_url, access_token)
print(json.dumps(tools, indent=2))
```

```
import asyncio
from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client

async def execute_mcp(
    url,
    token,
    headers=None
):
    default_headers = {
        "Authorization": f"Bearer {token}"
    }
    headers = {**default_headers, **(headers or {})}

    async with streamablehttp_client(
       url=url,
       headers=headers,
    ) as (
        read_stream,
        write_stream,
        callA,
    ):
        async with ClientSession(read_stream, write_stream) as session:
            # 1. Perform initialization handshake
            print("Initializing MCP...")
            _init_response = await session.initialize()
            print(f"MCP Server Initialize successful! - {_init_response}")

            # 2. List available tools
            print("Listing tools...")
            cursor = True
            tools = []
            while cursor:
                next_cursor = cursor
                if type(cursor) == bool:
                    next_cursor = None
                list_tools_response = await session.list_tools(next_cursor)
                tools.extend(list_tools_response.tools)
                cursor = list_tools_response.nextCursor

            tool_names = []
            if tools:
                for tool in tools:
                    tool_names.append(tool.name)
            tool_names_string = "\n".join(tool_names)
            print(
                f"List MCP tools. # of tools - {len(tools)}"
                f"List of tools - \n{tool_names_string}\n"
            )

async def main():
    url = "https://${GatewayEndpoint}/mcp"
    token = "your_bearer_token_here"

    # Optional additional headers
    additional_headers = {
        "Content-Type": "application/json",
    }

    await execute_mcp(
        url=url,
        token=token,
        headers=additional_headers
    )

# Run the async function
if __name__ == "__main__":
    asyncio.run(main())
```

```
from strands.tools.mcp.mcp_client import MCPClient
from mcp.client.streamable_http import streamablehttp_client
import os

def create_streamable_http_transport(mcp_url: str, access_token: str):
       return streamablehttp_client(mcp_url, headers={"Authorization": f"Bearer {access_token}"})

def get_full_tools_list(client):
    """
    List tools w/ support for pagination
    """
    more_tools = True
    tools = []
    pagination_token = None
    while more_tools:
        tmp_tools = client.list_tools_sync(pagination_token=pagination_token)
        tools.extend(tmp_tools)
        if tmp_tools.pagination_token is None:
            more_tools = False
        else:
            more_tools = True
            pagination_token = tmp_tools.pagination_token
    return tools

def run_agent(mcp_url: str, access_token: str):
    mcp_client = MCPClient(lambda: create_streamable_http_transport(mcp_url, access_token))

    with mcp_client:
        tools = get_full_tools_list(mcp_client)
        print(f"Found the following tools: {[tool.tool_name for tool in tools]}")

run_agent(<MCP URL>, <Access token>)
```

```
import asyncio

from langchain_mcp_adapters.client import MultiServerMCPClient

def list_tools(
    url,
    headers
):
    mcp_client = MultiServerMCPClient(
        {
            "agent": {
                "transport": "streamable_http",
                "url": url,
                "headers": headers,
            }
        }
    )
    tools = asyncio.run(mcp_client.get_tools())
    tool_details = []
    tool_names = []
    for tool in tools:
        tool_names.append(f"{tool.name}")
        tool_detail = f"{tool.name} - {tool.description} \n"

        tool_properties = tool.args_schema.get('properties', {})
        properties = []
        for property_name, tool_property in tool_properties.items():
            properties.append(f"{property_name} - {tool_property.get('description', None)} \n")
        tool_details.append(f"{tool_detail}{"\n".join(properties)}")

    tool_details_string = "\n".join(tool_details)
    tool_names_string = "\n".join(tool_names)
    print(
        f"Langchain: List MCP tools. # of tools - {len(tools)}\n",
        f"Langchain: List of tool names - \n{tool_names_string}\n"
        f"Langchain: Details of tools - \n{tool_details_string}\n"
    )
```

**Note**  
If search is enabled on the gateway, then the search tool, `x_amz_bedrock_agentcore_search` will be listed first in the response.