Which MCP features does each client support?

spec 2026-07-28

Claude Code

Website: https://claude.com/product/claude-code
clientInfo.name: claude-code
Protocol version: 2025-06-18

Core Protocol

✓ 0 · ◐ 0 · ✕ 0 · · 3

Stateless requests & per-request negotiation
Unknown
Server discovery
Unknown
Multi round-trip requests
Unknown

Transports

✓ 2 · ◐ 1 · ✕ 0 · · 0

stdio
Supported
Stdio servers run as local processes.
Source
Source
Verified
2026-07-01
Provenance
Manual
HTTP + SSE (deprecated)
Partial
SSE transport supported but deprecated.
Source
Source
Verified
2026-07-01
Provenance
Manual
Streamable HTTP
Supported
type accepts streamable-http; HTTP is recommended.
Source
Source
Verified
2026-07-01
Provenance
Manual

Subscriptions

✓ 0 · ◐ 0 · ✕ 0 · · 1

subscriptions/listen
Unknown

Tools

✓ 3 · ◐ 0 · ✕ 0 · · 1

Call tools
Supported
MCP servers give Claude Code access to tools.
Source
Source
Verified
2026-07-01
Provenance
Manual
List tools
Supported
Runs tools/list capability discovery on connect.
Source
Source
Verified
2026-07-01
Provenance
Manual
list_changed notifications
Supported
Supports list_changed notifications for tools.
Source
Source
Verified
2026-07-01
Provenance
Manual
Tool annotations
Unknown

Resources

✓ 3 · ◐ 0 · ✕ 0 · · 2

Read resources
Supported
Source
Source
Verified
2026-02-02
Provenance
Automated crawl
List resources
Supported
Runs resources/list capability discovery on connect.
Source
Source
Verified
2026-07-01
Provenance
Manual
Resource templates
Unknown
Subscribe to updates
Unknown
list_changed notifications
Supported
Supports list_changed notifications for resources.
Source
Source
Verified
2026-07-01
Provenance
Manual

Prompts

✓ 3 · ◐ 0 · ✕ 0 · · 1

Get prompts
Supported
MCP prompts become commands in Claude Code.
Source
Source
Verified
2026-07-01
Provenance
Manual
List prompts
Supported
Runs prompts/list capability discovery on connect.
Source
Source
Verified
2026-07-01
Provenance
Manual
Prompt arguments
Unknown
list_changed notifications
Supported
Supports list_changed notifications for prompts.
Source
Source
Verified
2026-07-01
Provenance
Manual

Sampling (deprecated)

✓ 0 · ◐ 0 · ✕ 0 · · 2

createMessage
Unknown
Tool calling in sampling
Unknown

Roots (deprecated)

✓ 1 · ◐ 0 · ✕ 0 · · 0

List roots
Supported
Server can call roots/list; returns launch directory.
Source
Source
Verified
2026-07-01
Provenance
Manual

Elicitation

✓ 1 · ◐ 0 · ✕ 0 · · 1

Elicit user input (form mode)
Unknown
URL mode elicitation
Supported
URL mode: opens a browser URL for authentication or approval.
Source
Source
Verified
2026-07-01
Provenance
Manual

Tasks (extension)

✓ 0 · ◐ 0 · ✕ 0 · · 4

Caching

✓ 0 · ◐ 0 · ✕ 0 · · 1

Cacheable result hints
Unknown

Completions

✓ 0 · ◐ 0 · ✕ 0 · · 1

Argument autocompletion
Unknown

Logging (deprecated)

✓ 0 · ◐ 0 · ✕ 0 · · 1

Receive log messages
Unknown

Authorization

✓ 2 · ◐ 0 · ✕ 0 · · 0

OAuth 2.1 client
Supported
Authenticate with remote servers requiring OAuth 2.0.
Source
Source
Verified
2026-07-01
Provenance
Manual
OAuth Client ID Metadata Documents
Supported
Supports servers using a Client ID Metadata Document (CIMD); auto-discovered.
Source
Source
Verified
2026-07-01
Provenance
Manual