v0.4.0

Changes

• Bump version to 0.4.0
• Add connection watchdog to detect and recover from hung connections

v0.3.2

Changes

• Bump version to 0.3.2
• Add topic normalization to prevent duplicate knowledge entries
• Auto-create GitHub release when publishing to PyPI

v0.3.1

What's New

v0.3.1 - Knowledge Discovery Improvements

• Add get_all_knowledge tool for retrieving all saved knowledge in one call
• Modify connect response to hint about available knowledge topics
• Helps ensure Claude uses knowledge consistently across all clients (web, iOS, desktop)

v0.3.0 - Audit Logging

• Add comprehensive audit logging for all MCP tool calls
• Logs written as JSONL files for easy analysis
• Configurable via U2_AUDIT_ENABLED, U2_AUDIT_PATH, etc.
• Automatic redaction of sensitive parameters
• See Configuration docs for details

Bug Fixes

• Fix mypy type error in audit.py
• Fix dictionary listing returning empty results (v0.2.3)
• Fix garbled output from MultiValue delimiters (v0.2.2)

v0.2.0 - Claude.ai Integrations Support

What's New

This release adds support for Claude.ai Integrations, enabling u2-mcp to function as a remote MCP server accessible directly from Claude.ai.

Features

• Streamable HTTP Transport: New --streamable-http mode implements the MCP 2025-06-18 spec for Claude.ai compatibility
• OAuth Authentication: Full OAuth 2.0 Authorization Server with Dynamic Client Registration (DCR)
• External Identity Provider Support:
  • Cisco Duo SSO
  • Auth0
  • Generic OIDC providers
• Token Management: Secure token issuance, refresh, and revocation

New Configuration Variables

Variable	Description
U2_AUTH_ENABLED	Enable OAuth authentication
U2_AUTH_ISSUER_URL	Public URL of the server
U2_IDP_PROVIDER	IdP type: duo, auth0, or oidc
U2_IDP_DISCOVERY_URL	OIDC discovery URL
U2_IDP_CLIENT_ID	OAuth client ID for IdP
U2_IDP_CLIENT_SECRET	OAuth client secret for IdP

Transport Modes

Mode	Flag	Use Case
stdio	(default)	Claude Desktop local
HTTP/SSE	--http	Legacy centralized
Streamable HTTP	--streamable-http	Claude.ai Integrations

Deployment Example

U2_AUTH_ENABLED=true \
U2_AUTH_ISSUER_URL=https://u2-mcp.example.com \
U2_IDP_PROVIDER=duo \
U2_IDP_DISCOVERY_URL=https://sso.example.com/.well-known/openid-configuration \
U2_IDP_CLIENT_ID=xxx \
U2_IDP_CLIENT_SECRET=xxx \
u2-mcp --streamable-http

Dependencies

• Updated mcp to >=1.24.0 for Streamable HTTP support
• Added httpx for async HTTP client
• Added starlette for web framework support

v0.1.1 - MCP Registry Support

What's New

• Added MCP registry support with server.json for registry submission
• Added mcp-name declaration to README for registry ownership verification
• Added MCP Registry badge to README

Installation

pip install u2-mcp==0.1.1

Or using uvx:

uvx u2-mcp

v0.1.0 - Initial Release

Features

• Connection Management - Connect to Universe/UniData servers with SSL support
• File Operations - Read, write, delete, and export records preserving MultiValue semantics
• Query Execution - Run RetrieVe/UniQuery statements and TCL commands with safety controls
• Dictionary Access - Explore file structures and field definitions
• BASIC Subroutine Calls - Execute cataloged BASIC programs
• Transaction Support - Full transaction management with commit/rollback
• Knowledge Persistence - Save and recall learned database information across sessions
• HTTP/SSE Mode - Centralized deployment option for teams
• Safety Controls - Read-only mode, command blocking, query validation

Installation

pip install u2-mcp

See the documentation for setup instructions.