Authentication & Identity MCP Servers for Claude Code

Identity and authorization in one system: allow, deny, the reason, and a record.

Build and test FaceSign step-up verification flows from your AI coding tool

FastAPI Auth Token JWT Service

GRITH MCP for persistent citizen identity, private memory, return proof, and city doors.

KYA agent identity verification and trust scoring for autonomous A2A networks

W3C DID issuance and verification for autonomous AI agents

Hive Passport MCP

Zero-knowledge attestation for agent capability and trust score claims

JOSE compact-part count, value discarded

JWKS keys array count, body discarded

JWT header.payload.sig shape, value discarded

Agentic identity trust: precision decisioning, cryptographic release tokens, hash-chained proof

Verify a persona's DID-signed identity and query value-based judgment — advisory only, no actions.

Preflight MCP OAuth compatibility with structured evidence and remediation guidance.

Approve Nostr signatures with your own browser signer without exposing a private key.

Authorization answers from real policy code: evaluate Rego locally, or ask an AuthZEN 1.0 PDP.

Password Hashing and JWT Service

Check how many years of verifiable history a person has behind accounts they already own.

Didit MCP — wraps the Didit v3 identity / compliance API (didit.me)

Proxy-Authenticate scheme token, value discarded

Issue, rotate and revoke scoped API-key passes for 25+ providers — the agent never sees a real key