Release / 22 Sep 2026

Open source MCP servers for AWS 2026.09.20260922000649

Analyze HealthOmics run performance using vended metrics.

Before you upgrade to 2026.09.20260922000649

2 to fix

Set `ALLOW_WRITE=true` at server startup for mutating tools; tool arguments cannot enable writes. Flux-query writes additionally need `INFLUXDB_WRITE_MODE=true`.

Action requiredWork with time-series databases using Amazon Timestream for InfluxDB.Affects: InfluxDB users performing control-plane or data-plane writes.

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awslabs/mcp/blob/2026.09.20260922000649/src/timestream-for-influxdb-mcp-server/README.md

Read operations redact sensitive fields unless `--allow-sensitive-data-access` is enabled; this includes statement code, job arguments, and failure text.

Behavior changedManage AWS Glue and EMR data-processing workflows.

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awslabs/mcp/releases/tag/2026.09.20260922000649

Read-only queries use a parser-based semantic policy, and direct connections verify TLS certificates and hostnames by default.

Behavior changedQuery PostgreSQL databases through the RDS Data API.Inferred

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awslabs/mcp/releases/tag/2026.09.20260922000649

For a private or self-signed database certificate, configure an appropriate `--ca_bundle` and `--sslmode`; the default is `verify-full`.

Action requiredQuery PostgreSQL databases through the RDS Data API.Affects: Direct PostgreSQL connections whose certificate is not trusted by the bundled CA set.Inferred

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awslabs/mcp/releases/tag/2026.09.20260922000649

SQL access checks use a parser-based read-only policy.

Behavior changedQuery Amazon Aurora DSQL databases.

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awslabs/mcp/releases/tag/2026.09.20260922000649

What changed in 2026.09.20260922000649

HealthOmics adds metric-backed analysis and pagination hints; Bedrock gains managed and agentic retrieval, and InfluxDB writes require startup authorization.

Available in the awslabs MCP server packages at this release. Use an MCP-compatible client and the relevant server's runtime, credentials, and service permissions.

Fixed and improved

Analyze run performance using vended metrics, select `logLevel` for new runs, and follow pagination continuation hints.

ImprovedGenerate, run, debug, and optimize life-science workflows in AWS HealthOmics.

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awslabs/mcp/releases/tag/2026.09.20260922000649

Query managed knowledge bases and use agentic retrieval.

ImprovedQuery Amazon Bedrock knowledge bases with source citations.

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awslabs/mcp/releases/tag/2026.09.20260922000649

Receive dataset search results ranked by relevance with stop words ignored.

ImprovedFind, inspect, and sample datasets from the Registry of Open Data on AWS.

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awslabs/mcp/releases/tag/2026.09.20260922000649

Sensitive-data redaction is applied consistently to ECS responses.

Now worksContainerize and deploy applications to Amazon ECS.

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awslabs/mcp/releases/tag/2026.09.20260922000649

List Cost Optimization Hub efficiency metrics and query recommendation or efficiency data through SQL offload.

ImprovedInvestigate AWS billing and cost management data.Inferred

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awslabs/mcp/releases/tag/2026.09.20260922000649

Seeded by @iluxav with Codex, from the release's public sources. Each change links to its evidence.