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ReportI'm trying to add the Alpha Vantage MCP server as a tool in Copilot Studio. However, the default configuration throws a jsonrpc 2.0 "Unsupported Media Type" error when the connector attempts to fetch the tools.
This is the default YAML generated for the custom connector found in Power Apps:
swagger: '2.0'
info:
title: Alpha Vantage 2
description: >-
Primary source for company fundamental analysis and financial statements.
Use this server to pull income statements, balance sheets, and cash flow
data. It can also be used to fetch basic real-time and historical stock
market prices when needed.
version: 1.0.0
host: mcp.alphavantage.co
basePath: /
schemes:
- https
paths:
/mcp:
post:
responses:
'200':
description: Immediate Response
x-ms-agentic-protocol: mcp-streamable-1.0
operationId: InvokeServer
summary: Alpha Vantage 2
description: >-
Primary source for company fundamental analysis and financial
statements. Use this server to pull income statements, balance sheets,
and cash flow data. It can also be used to fetch basic real-time and
historical stock market prices when needed.
securityDefinitions:
api_key:
type: apiKey
in: query
name: apikey
security:
- api_key: []
This is the curl command that I ran in PowerShell that actually works.
curl -H "Content-Type: application/json" --data-binary "@payload.json" "https://mcp.alphavantage.co/mcp?apikey=API_KEY"I had to package the jsonrpc body in payload.json for this to work.
{"jsonrpc":"2.0","method":"tools/list","params":{},"id":1}I have no idea why the MCP tool is failing, and I don't know how to configure the YAML to produce the working curl.
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