Adopt
The canonical source of truth for MCP server metadata — if your server isn't listed here, it doesn't officially exist.
Why It Matters
The Official MCP Registry at registry.modelcontextprotocol.io is the authoritative index for the MCP ecosystem. Backed by Anthropic, GitHub, and Microsoft, it provides a stable, open-source OpenAPI spec (frozen at v0.1 since October 2025) that sub-registries and tooling consume downstream. With 5,800+ servers indexed, this is where the ecosystem converges.
Strengths
- Backed by the organizations that define the protocol itself
- Stable API contract — v0.1 has not broken consumers since launch
- Open-source spec means anyone can build tooling on top
- Designed as the root of the registry tree: other registries pull from here
Limitations
- Metadata-only — no hosting, no management, no install tooling
- Listing a server requires a PR or submission process that can lag behind fast-moving community projects
- Discovery UX is minimal; you'll want a frontend like Smithery or PulseMCP for browsing
Risks
- Being metadata-only means no code signing, no integrity verification, no supply chain security — you trust the upstream package manager (npm, PyPI) to not serve malware
- The PR-based submission process creates a bottleneck; servers can exist in the wild for months before official listing
- "5,800+ servers" sounds impressive but many are abandoned, broken, or duplicative — no quality signal in the registry itself
- Governance is nominally open but practically controlled by Anthropic, GitHub, and Microsoft — smaller players have limited voice