awslabs/mcp

v2026.05.20260518145256 Feature

This release adds 1 notable feature for engineering teams evaluating rollout.

Published 16d MCP SaaS Integrations

✓ No known CVEs patched

✓ No known CVEs patched in this version

Topics

aws mcp mcp-client mcp-clients mcp-host mcp-server

+3 more

mcp-servers mcp-tools modelcontextprotocol

Summary

AI summary

Added file access mode to the user agent string in aws-api-mcp-server.

Type	Severity	Summary	CVE
Feature	Low	use @data_format index for search_transaction_spans in cloudwatch-applicationsignals-mcp-server use @data_format index for search_transaction_spans in cloudwatch-applicationsignals-mcp-server Source: granite4.1:8b-q6_K@2026-05-19 Confidence: high	—
Feature	Low	add file access mode to user agent string in aws-api-mcp-server add file access mode to user agent string in aws-api-mcp-server Source: granite4.1:8b-q6_K@2026-05-19 Confidence: high	—
Dependency	Low	upgrade AWS CLI to v1.45.9 in aws-api-mcp-server upgrade AWS CLI to v1.45.9 in aws-api-mcp-server Source: granite4.1:8b-q6_K@2026-05-19 Confidence: high	—
Bugfix	Medium	Set isError on CallToolResult for API failures per MCP spec Set isError on CallToolResult for API failures per MCP spec Source: granite4.1:8b-q6_K@2026-05-19 Confidence: high	—

Full changelog

feat(cloudwatch-applicationsignals-mcp-server): use @data_format index for search_transaction_spans by @syed-ahsan-ishtiaque in https://github.com/awslabs/mcp/pull/3346
fix: Set isError on CallToolResult for API failures per MCP spec by @wangyuhere in https://github.com/awslabs/mcp/pull/3527
chore: release(amazon-bedrock-agentcore-mcp-server): 0.1.0 — refresh README, dynamic version, version bump by @sundargthb in https://github.com/awslabs/mcp/pull/3529
chore(aws-api-mcp-server): upgrade AWS CLI to v1.45.9 by @awslabs-mcp in https://github.com/awslabs/mcp/pull/3532
feat(aws-api-mcp-server): add file access mode to user agent string by @arnewouters in https://github.com/awslabs/mcp/pull/3534
chore: release/2026.05.20260518145256 by @awslabs-mcp in https://github.com/awslabs/mcp/pull/3538

@syed-ahsan-ishtiaque made their first contribution in https://github.com/awslabs/mcp/pull/3346

Full Changelog: https://github.com/awslabs/mcp/compare/2026.05.20260514231351...2026.05.20260518145256

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