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# 列出 AgentCore 网关中的可用资源
<a name="gateway-using-mcp-resources-list"></a>

要列出 AgentCore 网关提供的所有可用资源，请向网关的 MCP 端点发出 POST 请求，并在请求正文中指定`resources/list`为方法：

**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}
```
在版本上`2026-07-28`，每个请求都带有`MCP-Protocol-Version`标头、`Mcp-Method`请求元数据标头和正`_meta`文中的版本字段。  

```
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: resources/list

${RequestBody}
```

**注意**  
网关仅接受其`protocolConfiguration.mcp`配置`supportedVersions`字段中列出的 MCP 协议版本。要使用版本`2026-07-28`，请确保您的网关`supportedVersions`包含该版本。您可以使用 [ UpdateGateway ](https://docs.amazonaws.cn/bedrock-agentcore-control/latest/APIReference/API_UpdateGateway.html) API 更改支持的版本。

替换以下值：
+  `${GatewayEndpoint}`— 网关的 URL，如 [ CreateGateway ](https://docs.amazonaws.cn/bedrock-agentcore-control/latest/APIReference/API_CreateGateway.html) API 的响应中所提供。
+  `${Authorization header}`— 设置[入站授权时身份提供商提供的授权凭证](gateway-inbound-auth.md)。
+  `${McpProtocolVersion}`— 请求的 MCP 协议版本，例如`2025-11-25`。该版本必须是您的网关支持的版本。
+  `${RequestBody}`— 请求正文的 JSON 负载，如[模型上下文协议 (MCP) [https://modelcontextprotocol.io/specification/2025-06-18/server/resources#listing-resources](https://modelcontextprotocol.io/specification/2025-06-18/server/resources#listing-resources) 中的资源](https://modelcontextprotocol.io/docs/getting-started/intro)列表中所述。包括`resources/list`作为`method`. 在版本中`2026-07-28`，还要包括`_meta`版本字段`params`。

**注意**  
有关可选支持的参数列表`resources/list`，请参阅[模型上下文协议文档[资源](https://modelcontextprotocol.io/specification/2025-06-18/server/resources)中请求正文中的`params`对象](https://modelcontextprotocol.io/specification/2025-06-18)。在页面顶部的搜索栏旁边，您可以选择要查看其文档的 MCP 版本。确保该版本是亚马逊 Bedrock [ AgentCore ](gateway-using.md) 支持的版本。

响应返回可用资源的列表，包括其 URI、名称、描述和 MIME 类型。

**注意**  
与工具和提示不同，返回的资源 URI 不带目标名称前缀。来自 MCP 服务器的原始 URI 按原样返回。

**注意**  
当多个目标暴露相同的资源 URI 时，网关会从目标返回`resourcePriority`值最低的资源。

**重要**  
资源 URI 由下游 MCP 服务器目标提供，未经网关验证或清理。恶意或受感染的 MCP 服务器可能会返回指向内部端点 (SSRF) 或本地文件系统路径（例如）的 URI。`file:///etc/passwd`在关注资源 URI 之前对其进行验证和清理，不要自动从不可信的 MCP 服务器目标获取或呈现 URI。

## 列出资源的代码示例
<a name="gateway-using-mcp-resources-list-examples"></a>

要查看在网关中列出可用资源的示例，请选择以下方法之一：

**Example**  
将标`MCP-Protocol-Version`头设置为您的网关支持的版本。  

```
import requests
import json

def list_resources(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-resources-request",
        "method": "resources/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
resources = list_resources(gateway_url, access_token)
print(json.dumps(resources, indent=2))
```
在版本上`2026-07-28`，添加`MCP-Protocol-Version`和`Mcp-Method`标头，并在请求正文中包含`_meta`版本字段。您的网关`supportedVersions`必须包括`2026-07-28`。  

```
import requests
import json

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

    payload = {
        "jsonrpc": "2.0",
        "id": "list-resources-request",
        "method": "resources/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
resources = list_resources(gateway_url, access_token)
print(json.dumps(resources, 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 resources
            print("Listing resources...")
            cursor = True
            resources = []
            while cursor:
                next_cursor = cursor
                if isinstance(cursor, bool):
                    next_cursor = None
                list_resources_response = await session.list_resources(next_cursor)
                resources.extend(list_resources_response.resources)
                cursor = list_resources_response.nextCursor

            if resources:
                for resource in resources:
                    print(f"{resource.uri} - {resource.name} ({resource.mimeType})")
            print(f"Total resources: {len(resources)}")

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())
```

```
# NOTE: Strands SDK resource support may vary. Use the MCP Client approach
# above for the most reliable resources/list implementation.
from strands.tools.mcp.mcp_client import MCPClient
from mcp.client.streamable_http import streamablehttp_client

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

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

    with mcp_client:
        result = mcp_client.list_resources_sync()
        print(f"Found the following resources: {[r.uri for r in result.resources]}")

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

```
# NOTE: LangGraph MCP adapter resource support may vary. Use the MCP Client
# approach above for the most reliable resources/list implementation.

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

async def list_resources(url, token):
    headers = {"Authorization": f"Bearer {token}"}
    async with streamablehttp_client(url=url, headers=headers) as (
        read_stream, write_stream, callA
    ):
        async with ClientSession(read_stream, write_stream) as session:
            await session.initialize()
            response = await session.list_resources()
            for resource in response.resources:
                print(f"{resource.uri} - {resource.name}")

asyncio.run(list_resources("https://${GatewayEndpoint}/mcp", "${AccessToken}"))
```