從 AgentCore 閘道取得提示
若要取得特定提示，請對閘道的 MCP 端點提出 POST 請求，並在請求內文、提示名稱和引數中指定 prompts/get作為方法：
POST /mcp HTTP/1.1
Host: ${GatewayEndpoint}
Content-Type: application/json
Authorization: ${Authorization header}
${RequestBody}
取代以下的值：
-
${GatewayEndpoint} – 閘道的 URL，如 CreateGateway API 的回應所提供。
-
${Authorization header} – 當您設定傳入授權時，來自身分提供者的授權憑證。
-
${RequestBody} – 請求內文的 JSON 承載，如模型內容通訊協定 (MCP) 中的取得提示中所指定。包含 prompts/get做為 method，並包含提示name的 及其 arguments。
回應會以訊息陣列的形式傳回轉譯的提示，每個提示都具有角色和內容。
prompts/get 操作會將即時請求代理到下游 MCP 伺服器。提示名稱必須包含目標字首 （例如 myTarget___myPrompt)。
用於取得提示的程式碼範例
若要查看從閘道取得提示的範例，請選取下列其中一種方法：
範例
- curl
-
-
下列 curl 請求顯示透過 ID 為 myTarget___code_review的閘道取得呼叫提示的範例請求mygateway-abcdefghij。
curl -X POST \
https://mygateway-abcdefghij.gateway.bedrock-agentcore.us-west-2.amazonaws.com/mcp \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
-d '{
"jsonrpc": "2.0",
"id": "get-prompt-request",
"method": "prompts/get",
"params": {
"name": "myTarget___code_review",
"arguments": {
"language": "python",
"code": "print(\"hello\")"
}
}
}'
- Python requests package
-
-
import requests
import json
def get_prompt(gateway_url, access_token, prompt_name, arguments):
headers = {
"Content-Type": "application/json",
"Authorization": f"Bearer {access_token}"
}
payload = {
"jsonrpc": "2.0",
"id": "get-prompt-request",
"method": "prompts/get",
"params": {
"name": prompt_name,
"arguments": arguments
}
}
response = requests.post(gateway_url, headers=headers, json=payload)
return response.json()
# Example usage
gateway_url = "https://${GatewayEndpoint}/mcp" # Replace with your actual gateway endpoint
access_token = "${AccessToken}" # Replace with your actual access token
result = get_prompt(
gateway_url,
access_token,
"myTarget___code_review", # Replace with {targetName}___{promptName}
{"language": "python", "code": "print('hello')"}
)
print(json.dumps(result, indent=2))
- MCP Client
-
-
from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client
import asyncio
async def execute_mcp(
url,
token,
prompt_name,
prompt_arguments,
headers=None
):
default_headers = {
"Authorization": f"Bearer {token}"
}
headers = {**default_headers, **(headers or {})}
async with streamablehttp_client(
url=url,
headers=headers,
) as (
read_stream,
write_stream,
callA,
):
async with ClientSession(read_stream, write_stream) as session:
# 1. Perform initialization handshake
print("Initializing MCP...")
_init_response = await session.initialize()
print(f"MCP Server Initialize successful! - {_init_response}")
# 2. Get specific prompt
print(f"Getting prompt: {prompt_name}")
prompt_response = await session.get_prompt(
name=prompt_name,
arguments=prompt_arguments
)
print(f"Prompt response: {prompt_response}")
return prompt_response
async def main():
url = "https://${GatewayEndpoint}/mcp"
token = "your_bearer_token_here"
prompt_name = "myTarget___code_review"
prompt_arguments = {
"language": "python",
"code": "print('hello')"
}
await execute_mcp(
url=url,
token=token,
prompt_name=prompt_name,
prompt_arguments=prompt_arguments
)
if __name__ == "__main__":
asyncio.run(main())
- LangGraph MCP Client
-
-
注意：LangGraph MCP 轉接器提示支援可能會有所不同。使用上面的 MCP 用戶端方法進行最可靠的prompts/get實作。
import asyncio
from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client
async def get_prompt(url, token, prompt_name, arguments):
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.get_prompt(
name=prompt_name,
arguments=arguments
)
for message in response.messages:
print(f"{message.role}: {message.content}")
asyncio.run(get_prompt(
"https://${GatewayEndpoint}/mcp",
"${AccessToken}",
"myTarget___code_review",
{"language": "python", "code": "print('hello')"}
))
錯誤
prompts/get 操作可能會傳回下列類型的錯誤：
