modelcontextprotocol / modelcontextprotocol/typescript-sdk
Implement SEP-990: Enterprise Managed Authorization (Extension)
@aaronpk is already working on this.
Since Nov 20, 2025.
- Dominant language
- TypeScript
- Stars
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- Forks
- 2.2k
- Avg merge
- 3d 15h
- Merged PRs (30d)
- 4
Description
This is a tracking issue for implementation of SEP-990.
Summary
This extension enables secure authorization of MCP clients within enterprise environments by leveraging existing enterprise Identity Provider (IdP) infrastructure. The TypeScript SDK needs to implement client-side OAuth flows including OpenID Connect/SAML integration, RFC8693 Token Exchange to obtain Identity Assertion JWT Authorization Grants (ID-JAG), and RFC7523 JWT Bearer Grant flows. Server-side implementations need JWT validation including signature verification, claims validation, and replay prevention. This extension provides seamless single sign-on for users while enabling enterprise administrators to control which MCP servers can be accessed and enforce policies through existing IdP infrastructure.
Related Issues & PRs
- Implementation PRs: n/a
- Related PRs: n/a
- Related Issues: n/a
Contributor guide
First steps
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- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
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