> For the complete MongoDB documentation index, see www.mongodb.com/docs/llms.txt # Local MCP Server Release Notes ## 3.0.5 *Released October 1, 2026* Bug fixes: - Includes the connection name in the text output of the `list-connections` tool. - Allows `$iceberg` pipelines in Atlas Stream Processing by removing the last-stage validation. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v3.0.5) ## 3.0.4 *Released September 21, 2026* Bug fixes: - Fixes an issue where proxy-based `fetch` used an incompatible `Request` implementation. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v3.0.4) ## 3.0.3 *Released September 18, 2026* Bug fixes: - Fixes an issue where modern-era methods returned the wrong error code when called without `_meta`. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v3.0.3) ## 3.0.2 *Released September 17, 2026* Bug Fixes: - Resolves client identity from the per-request envelope. Client info was previously dropped on the modern stateless per-request envelope path, and the `mcp_client_name` and `mcp_client_version` telemetry fields were never populated. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v3.0.2) ## 3.0.0 *Released September 17, 2026* New features and updates: - Supports the MCP protocol revision 2026-07-28 over HTTP and `stdio` transports. - Adds an `atlas-get-regions` tool to look up the Atlas regions supported for each cloud provider. - Adds AWS MSK IAM authentication support to the Stream Processing tools. - Adds processor autoscaling support to the Stream Processing tools. - Adds scaling support to the `atlas-upgrade-cluster` tool so you can change a dedicated cluster's instance size and compute autoscaling settings. - Requires an explicit `dangerousHostBinding` opt-in to bind the HTTP server to a non-loopback address. Bug fixes: - Prevents the `export` tool from running aggregation pipelines that include write stages. - Propagates connection errors from database tools instead of returning generic failures. - Redacts connection string secrets from connection error output. - Shuts down the `stdio` server when the client closes the connection. - Improves the total count returned by the `atlas-list-orgs` and `atlas-list-projects` tools. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v3.0.0) ## 2.0.0 *Released August 4, 2026* New features and updates: - Requires an explicit connection id for all database operations. The `connect`, `atlas-connect-cluster`, and `atlas-local-connect-deployment` tools return a connection id, and a pre-configured connection uses the `preconfigured` id. - Adds Customer-Managed Key (CMK) encryption support to the `atlas-create-cluster` tool. - Adds multi-region configuration support to the `atlas-create-cluster` tool. - Updates the `aggregate` tool schema description to guide models toward constructing correct aggregation pipelines. Bug fixes: - Validates the `resourceName` and `peeringId` parameters in Stream Processing tools to block path traversal. - Requires the `projectName` and `orgId` parameters for the `atlas-create-project` tool. - Rejects unrecognized tool arguments with strict input validation. - Paginates output from the `atlas-list-orgs` and `atlas-list-projects` tools. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v2.0.0) ## 1.14.0 *Released July 14, 2026* New features and updates: - Redacts sensitive information from configuration resource output by default. - Adds a `maxSessions` option to control the number of sessions the MCP server creates. - Extends MQL validation to cover projections in the `find`, `export`, and `explain` tools. - Adds validation when creating a new database user. Bug fixes: - Redacts sensitive information from MCP server log output by default. - Updates cluster listing output to include the project name inside the `untrusted-data` tag. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v1.14.0) ## 1.13.0 *Released June 16, 2026* New features and updates: - Disables server-side JavaScript functions (`$where`, `$function`, and `$accumulator`) by default to prevent unintended behavior. To re-enable it, set `disableServerSideJs` to `false` in the configuration settings. - Adds an `atlas-load-sample-dataset` tool to load sample datasets into an Atlas cluster. - Adds an `atlas-pause-resume-cluster` tool to pause and resume Atlas clusters. Bug fixes: - Fixes an issue where renaming a collection with `dropTarget: true` was not blocked when destructive operations were disabled. - Fixes an issue where mongosh CLI options such as `oidcTrustedEndpoint` were not applied in the connect-tool path. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v1.13.0) ## 1.12.0 *Released June 4, 2026* New features and updates: - Adds an `atlas-create-cluster` tool to create M10–M80 replica set and single-shard Atlas clusters. The tool automatically selects a recommended instance size (M10 or M30) based on existing project clusters and returns immediately while the cluster provisions in the background. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v1.12.0) ## 1.11.0 *Released May 22, 2026* New features and updates: - Adds an `atlas-upgrade-cluster` tool to upgrade Atlas Free or Flex clusters to a higher tier. - When connecting to Atlas Free or Flex tier clusters, the MCP Server now automatically checks for active resource alerts and surfaces a recommendation to upgrade when relevant thresholds are exceeded. - Adds a database-level aggregation tool. - The setup command now includes an option to download MongoDB Agent Skills alongside the MCP Server configuration. Bug fixes: - Fixes an issue where `atlas-list-clusters` returned an error instead of an empty result. - Fixes an issue where aggregations were blocked when `getSearchIndexes` failed. - Fixes an aggregate schema compatibility issue with OpenAI models. - Fixes an issue with search index checks where the MCP server would incorrectly infer that a MongoDB deployment doesn't have Atlas Search support. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v1.11.0) ## 1.10.0 *Released April 20, 2026* New features and updates: - Adds a `maxTimeMS` configuration option, allowing you to set a time limit for query execution. - Adds support for a configurable minimum log level. Bug fixes: - Fixes an issue where the `atlas-list-alerts` missed open and active alerts. - Fixes an issue where the MCP Server API client did not fall back to browser-based fetch, which caused connectivity failures in certain environments. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v1.10.0) ## 1.9.0 *Released March 24, 2026* New features and updates: - Adds a setup utility to simplify installation and configuration of the MCP Server for popular AI clients. To use the utility, run `npx mongodb-mcp-server@latest setup` and follow the interactive setup steps. For more details, see [MCP Server setup utility.](https://www.mongodb.com/docs/mcp-server/get-started.md#std-label-mcp-get-started-configure) - MCP Server is now compatible with Claude Code and Open Code. - Adds new Atlas Stream Processing tools: `atlas-streams-discover`, `atlas-streams-build`, `atlas-streams-manage`, and `atlas-streams-teardown`. - Moves vector search and lexical search index management tools from public preview. Those tools can now operate on lexical and vector search indexes when available. - Adds a service to collect and report metrics about tool usage. - Removes MCP automated embeddings feature. - Adds support for deploying the MCP Server to [Amazon Bedrock AgentCore.](https://aws.amazon.com/bedrock/agentcore/) [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v1.9.0) ## 1.8.1 *Released March 13, 2026* Bug fixes: - Changes the behavior of the `find` tool to also return the total number of documents the query matched without the `limit` clause. - Fixes an issue where telemetry reported duplicate events. [Full release notes available on GitHub.](https://github.com/mongodb-js/mongodb-mcp-server/releases/tag/v1.8.1) ## 1.8.0 and Earlier For full release notes from versions 1.8.0 and earlier, see the [MongoDB MCP Server Releases](https://github.com/mongodb-js/mongodb-mcp-server/releases) on GitHub.