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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.319 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 22 Sep 2026
One change · api

overview changedagents-and-tools/mcp-tunnels/overview

Nearest release: v2.1.280, published under an hour before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Recorded here
Lines+9added
Lines−9removed
From line 147 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits11to this page, all time

The whole hunk

from line 147, old and new numbered
/
lines
from line 147
147147 -H "anthropic-version: 2023-06-01" \
148148 -H "anthropic-beta: mcp-client-2025-11-20" \
149149 -d '{
150 "model": "claude-opus-5",
150 "model": "claude-opus-5-5",
151151 "max_tokens": 1000,
152152 "messages": [{"role": "user", "content": "Use the hello tool to greet tunnel."}],
153153 "mcp_servers": [
from line 163
163163 
164164 ```bash CLI
165165 ant beta:messages create --beta mcp-client-2025-11-20 <<'YAML'
166 model: claude-opus-5
166 model: claude-opus-5-5
167167 max_tokens: 1000
168168 messages:
169169 - role: user
from line 182
182182 client = anthropic.Anthropic()
183183 
184184 response = client.beta.messages.create(
185 model="claude-opus-5",
185 model="claude-opus-5-5",
186186 max_tokens=1000,
187187 messages=[{"role": "user", "content": "Use the hello tool to greet tunnel."}],
188188 mcp_servers=[
from line 203
203203 const anthropic = new Anthropic();
204204 
205205 const response = await anthropic.beta.messages.create({
206 model: "claude-opus-5",
206 model: "claude-opus-5-5",
207207 max_tokens: 1000,
208208 messages: [
209209 {
from line 235
235235 
236236 var parameters = new MessageCreateParams
237237 {
238 Model = Messages::Model.ClaudeOpus5,
238 Model = Messages::Model.ClaudeOpus5_5,
239239 MaxTokens = 1000,
240240 Messages = new List<BetaMessageParam>
241241 {
from line 264
264264 client := anthropic.NewClient()
265265 
266266 response, err := client.Beta.Messages.New(context.TODO(), anthropic.BetaMessageNewParams{
267 Model: anthropic.ModelClaudeOpus5,
267 Model: anthropic.ModelClaudeOpus5_5,
268268 MaxTokens: 1000,
269269 Messages: []anthropic.BetaMessageParam{
270270 anthropic.NewBetaUserMessage(anthropic.NewBetaTextBlock("Use the hello tool to greet tunnel.")),
from line 300
300300 AnthropicClient client = AnthropicOkHttpClient.fromEnv();
301301 
302302 MessageCreateParams params = MessageCreateParams.builder()
303 .model(Model.CLAUDE_OPUS_5)
303 .model(Model.CLAUDE_OPUS_5_5)
304304 .maxTokens(1000L)
305305 .addUserMessage("Use the hello tool to greet tunnel.")
306306 .addMcpServer(BetaRequestMcpServerUrlDefinition.builder()
from line 326
326326 messages: [
327327 ['role' => 'user', 'content' => 'Use the hello tool to greet tunnel.']
328328 ],
329 model: 'claude-opus-5',
329 model: 'claude-opus-5-5',
330330 mcpServers: [
331331 [
332332 'type' => 'url',
from line 350
350350 client = Anthropic::Client.new
351351 
352352 response = client.beta.messages.create(
353 model: "claude-opus-5",
353 model: "claude-opus-5-5",
354354 max_tokens: 1000,
355355 messages: [
356356 { role: "user", content: "Use the hello tool to greet tunnel." }
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