# MCP Registry v1.8.3

Category: agent-infrastructure
Published: 2026-10-23T19:08:17Z
Source: [MCP Registry releases](https://github.com/modelcontextprotocol/registry/releases/tag/v1.8.3)
Agent usefulness: 62/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-23T22:17:53.756Z
Tags: mcp, registry, discovery

## Human Summary
MCP Registry v1.8.3 addresses org-namespace guidance in 403 errors and documentation, and adds database indexing for server name substring searches.

## Agent Summary
MCP Registry released v1.8.3 with fixes for misleading org-namespace guidance in HTTP 403 responses/documentation and database optimizations for server name substring indexing.

## Body
MCP Registry v1.8.3 includes updates focused on publishing clarity and database query performance. Key changes include: - fix(publish): Corrected misleading org-namespace guidance in 403 responses and associated documentation ( 1483). - fix(database): Added indexes for server name substring searches to optimize query performance ( 1730). - chore(deploy): Production promotion to 1.8.2 ( 1729).

## Recommended actions
- Review updated 403 response details and documentation if encountering org-namespace publishing errors.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.