# Release Notes

> Find the release history and migration notes for Context7 packages

Context7 packages have separate release schedules. Use each package's changelog
for its full release history, including fixes, new features, and breaking changes.

| Package | Release history | Latest published version |
| ------- | --------------- | ------------------------ |
| MCP server | [MCP changelog](https://github.com/upstash/context7/blob/master/packages/mcp/CHANGELOG.md) | [npm](https://www.npmjs.com/package/@upstash/context7-mcp) |
| CLI | [CLI changelog](https://github.com/upstash/context7/blob/master/packages/cli/CHANGELOG.md) | [npm](https://www.npmjs.com/package/ctx7) |
| TypeScript SDK | [SDK changelog](https://github.com/upstash/context7/blob/master/packages/sdk/CHANGELOG.md) | [npm](https://www.npmjs.com/package/@upstash/context7-sdk) |

## Before you upgrade

1. Check the changelog for changes since your installed version.
2. Check the [runtime requirements and migration notes](/resources/technical-reference).
3. Test your client configuration and documentation queries with the new version.

For the MCP server, version 2 replaced `get-library-docs` with `query-docs` and
introduced query-based retrieval. Version 3 introduced HTTP sessions; version 4
removed those sessions and uses stateless HTTP serving. See
[Architecture & Operational Behavior](/resources/architecture) for current
transport behavior.

Tool descriptions ask agents to use each tool at most 3 times per question.
This instruction does not create a server-enforced request limit. See
[rate limits](/api-guide#rate-limits) for account and request limits.