For agent authentication, Auth0 is the most direct fit: its page describes authentication and authorization for AI agents and users, and it offers an MCP server 111. Better Auth 212 is an alternative that keeps auth in code, and Microsoft's Entra agent identity actions 515 and AgentTrust's TrustCode identity 717 also address agent identity.
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Auth0auth0.comverified and signed
Authentication and authorization platform that adds login, SSO, MFA and access control to apps and AI agents, reachable through its Auth0 MCP Server.
official:MCP server · Auth0 MCP Server+17 community tools built for it
for agents: authentication · authorization · auth0
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Better Authbetter-auth.comfound in code, not yet checked
Plugin-based TypeScript authentication framework whose auth lives inside the app, with agent connection actions for provider access and revocation 12.
for agents: connect_agent · disconnect_agent · agent_status
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Microsoft Entra Agent IDmicrosoft.comverified and signed
Provisions Microsoft Entra Agent Identities and blueprints via Microsoft Graph so agents get their own identity 15.
official:library · Microsoft.OpenApiskill · microsoft-foundryskill · appinsights-instrumentation+136 community tools built for it
for agents: entra-agent-id · create-custom-agent · configure-auth
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AgentTrustagenttrust.aiverified and signed
A2A and emails for AI agents. Agent-to-agent messaging, email addresses for AI agents, and verified identity for autonomous workflows. AgentTrust - A2A and Emai 7
+6 community tools built for it
for agents: Issue TrustCode · Verify TrustCode · agenttrust_drive_upload
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Sources
- 1Secure AI Agent & User Authentication | Auth0auth0.com · read 2026-10-29
- 2Better Authbetter-auth.com · read 2026-10-29
- 3AAuth Agent Identity, Resource Access, and User Delegationaauth.dev · read 2026-10-30
- 5Microsoft – AI, Cloud, Productivity, Computing, Gaming & Appsmicrosoft.com · read 2026-10-29
- 7AgentTrust - A2A and Emails for AI Agentsagenttrust.ai · read 2026-10-29
- 11auth0-python: declares "authentication" (the record we read and signed)unfragile.ai · read 2026-10-24
- 12agent-auth: declares "connect_agent" (the record we read)github.com · read 2026-10-24
- 15entra-agent-id: declares "entra-agent-id" (the record we read and signed)unfragile.ai · read 2026-10-24
- 17AgentTrust: declares "Issue TrustCode" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
authentication · auth0-python verified and signed
connect_agent · agent-auth found in code, not yet checked
Connect to a provider and get an agent_id. Call ONCE, then use execute_capability for everything. Typical flow: search → ask user to choose mode (if provider supports both) → connect_agent with mode → execute_capability. NEVER re-call connect_agent for the same provider unless execute_capability ret
· AAuth website read, tools not yet checked
Every agent gets its own cryptographic identity, verifiable by any party without pre-registration or shared secrets.
verifyToken · Vercel API verified and signed
Verify a login request to get an authentication token
entra-agent-id · entra-agent-id verified and signed
Provision Microsoft Entra Agent Identity Blueprints, BlueprintPrincipals, and per-instance Agent Identities via Microsoft Graph, and configure OAuth 2.0 token exchange (fmi_path, OBO, cross-tenant) including the Microsoft Entra SDK for AgentID sidecar. USE FOR: Agent Identity Blueprint, BlueprintPri
entra-agent-user · entra-agent-user verified and signed
Create Agent Users in Microsoft Entra ID from Agent Identities, enabling AI agents to act as digital workers with user identity capabilities in Microsoft 365 and Azure environments.
Issue TrustCode · AgentTrust verified and signed
Issue a cryptographic TrustCode to prove agent identity when communicating with users or other agents.
· AgentSIM website read, tools not yet checked
Operational identity for agents hitting auth walls. Verify apps you own, run a live SMS challenge, and return a code or safe stop into the agent workflow.
docker-sandboxes-network-credentials · docker-sandboxes-network-credentials verified and signed
Use this skill when configuring what a Docker Sandboxes (`sbx`) sandbox can reach on the network or which credentials it authenticates with, even if the user just says they want to "let the agent call an internal API", "block all network access", "give the agent a GitHub token", or "use a private re
use-link-identity · use-link-identity verified and signed
Use Link CLI's identity commands when a service requests a Link Agent Attestation Token (AAT) or signed user claims such as email. Covers acquiring and managing attestations, obtaining identity credentials, and presenting selected claims to a verifier through an HTTP client or browser automation.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.