# Agents, Workers - Agents SDK adds MCP Specification 2026-07-28 support

Publisher-attributed story with a reviewed brief or permitted publisher paragraph. The original publisher is responsible for the linked reporting.

- Publisher: Cloudflare Developers
- Category: AI
- Original publication time: 2026-07-27T00:00:00Z
- First observed by NexusTechWire: 2026-10-01T15:54:33Z
- Original source: https://developers.cloudflare.com/changelog/post/2026-07-27-agents-sdk-v0.20.0-mcp-sdk-v2/
- NexusTechWire record: https://nexustechwire.com/news/news-f99e355c7b4873d1c70b

## From the publisher

Agents SDK v0.20.0 adds client and server support for the MCP 2026-07-28 release candidate ↗︎. Workers can serve tools, prompts, resources, and elicitation without an MCP transport session or Durable Object. Agents can connect to both MCP 2026-07-28 servers and existing legacy servers. Client support The MCP client manager now uses @modelcontextprotocol/client. For each connection, it probes for MCP 2026-07-28 support with server/discover. If the server does not support the stateless protocol, the client continues with the legacy initialize handshake on the same connection. Existing addMcpServer calls do not need a protocol-version setting or separate clients for each protocol generation. For stateless requests, elicitation uses input\_required through multi-round-trip requests (MRTR). The legacy path uses the same form and URL handlers for pushed requests.

Source license: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Publisher excerpt shortened and converted to plain text. Original source license applies.

Read the full original: [Cloudflare Developers](https://developers.cloudflare.com/changelog/post/2026-07-27-agents-sdk-v0.20.0-mcp-sdk-v2/)

This record does not reproduce the complete article or represent independent confirmation of every source claim.