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Implement MCP 2026-07-28 (#2286)

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Co-authored-by: Matt <77928207+mattzcarey@users.noreply.github.com>
Co-authored-by: Konstantin Konstantinov <KKonstantinov@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
This commit is contained in:
Felix Weinberger 2026-06-26 14:01:10 +01:00 • committed by GitHub
commit 1823aae891
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39
examples/custom-version/server.ts Normal file
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/**
* `supportedProtocolVersions`: support a protocol version not yet in the SDK.
* The first version in the list is the fallback when the client requests an
* unsupported one. One binary, either transport.
*/
import { createServer } from 'node:http';
import { parseExampleArgs } from '@mcp-examples/shared';
import { toNodeHandler } from '@modelcontextprotocol/node';
import { createMcpHandler, McpServer, SUPPORTED_PROTOCOL_VERSIONS } from '@modelcontextprotocol/server';
import { serveStdio } from '@modelcontextprotocol/server/stdio';
// Add support for a newer protocol version (first in list is fallback).
const CUSTOM_VERSIONS = ['2026-01-01', ...SUPPORTED_PROTOCOL_VERSIONS];
function buildServer(): McpServer {
const server = new McpServer(
{ name: 'custom-protocol-server', version: '1.0.0' },
{ supportedProtocolVersions: CUSTOM_VERSIONS, capabilities: { tools: {} } }
);
server.registerTool('get-protocol-info', { description: 'Returns protocol version configuration' }, async () => ({
content: [{ type: 'text', text: JSON.stringify({ supportedVersions: CUSTOM_VERSIONS }) }]
}));
return server;
}
const { transport, port } = parseExampleArgs();
if (transport === 'stdio') {
void serveStdio(buildServer);
console.error('[server] serving over stdio');
} else {
const handler = createMcpHandler(buildServer);
createServer(toNodeHandler(handler)).listen(port, () => {
console.error(`[server] listening on http://127.0.0.1:${port}/mcp`);
});
}