11 line(s) added, 2 removed (around "May 19, 2026").

Summary by fallback. It may be wrong; the diff below is what actually changed. Raw: 7e1883218c-anthropic-api-release-notes.diff · commit 7e1883218c

diff --git a/snapshots/anthropic/api-release-notes.md b/snapshots/anthropic/api-release-notes.mdindex 2fd4ebd..958526c 100644--- a/snapshots/anthropic/api-release-notes.md+++ b/snapshots/anthropic/api-release-notes.md@@ -5,4 +5,19 @@ For release notes on Claude Apps, see the Release notes for Claude Apps in the C For updates to Claude Code, see the complete CHANGELOG.md in the `claude-code` repository. +### May 19, 2026++- MCP tunnels is now available as a Research Preview, so you can connect to MCP servers in your private network.+- Self-hosted sandboxes are now available for Claude Managed Agents, as an alternative to running tool execution in Anthropic's infrastructure. See Self-hosted sandboxes.+- With Claude Managed Agents, you can now update the agent's MCP server and tool configurations associated with an active session.+- With Claude Managed Agents, large outputs from `agent_toolset` and MCP tools exceeding 100K tokens are now automatically spilled to a file in the sandbox. The model receives a truncated preview with the file path and can read the full content from there.++### May 18, 2026++- The web search tool now returns richer SEC filing data, making it easier to ground financial research agents, earnings analysis, and due-diligence workflows in primary sources with citations.++### May 13, 2026++- We've launched cache diagnostics in public beta. Pass `diagnostics.previous_message_id` on a Messages request and the API reports a `cache_miss_reason` explaining where the prompt cache prefix diverged from the previous turn. Include the `cache-diagnosis-2026-04-07` beta header in your requests.+ ### May 12, 2026 @@ -16,7 +31,7 @@ For updates to Claude Code, see the complete CHANGELOG.md in the `claude-code` r  - Multiagent sessions and Outcomes are now in public beta under the standard `managed-agents-2026-04-01` beta header.-- Vault credential background refresh is now supported for `mcp_oauth` credentials. See Authenticate with vaults.+- Claude Managed Agents vault credential background refresh is now supported for `mcp_oauth` credentials. See Authenticate with vaults. - Webhooks for Claude Managed Agents are now supported. Webhook event types include session and vault lifecycle events. See Subscribe to webhooks.-- Additional filtering and sorting options are now supported. Sessions can be filtered by status, and events can be filtered by type. Events can now be filtered by creation time.+- Additional filtering and sorting options are now supported for Claude Managed Agents. Sessions can be filtered by status, and events can be filtered by type. Events can now be filtered by creation time.  ### April 30, 2026

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