AgentIndex icon
AgentIndex
phantom-secrets logo
phantom-secrets
★ 18
vs
authserver logo
authserver
★ 81

phantom-secrets vs authserver

phantom-secrets: Phantom protects sensitive API keys and credentials when working with AI coding agents by replacing real secrets with scoped placeholders. It uses an authenticated local proxy to inject configured authentication values into API requests, preventing agents from directly accessing or exposing actual secret values.; authserver: Authplane is a self-hosted authorization server designed for the Model Context Protocol (MCP), simplifying secure authentication and authorization for AI agents and services. It handles token issuance, validation, IdP federation, and agent-to-agent delegation, offering a complete solution for securing MCP servers.

01

TL;DR

phantom-secrets logo
phantom-secretsSecurity & Safety · ★ 18

Securing API keys and sensitive credentials for AI coding agents in development workflows.

Read phantom-secrets full review →
authserver logo
authserverSecurity & Safety · ★ 81

Securing new or existing Model Context Protocol (MCP) servers.

Read authserver full review →
02

Side-by-Side Comparison

Field
phantom-secrets logophantom-secrets
authserver logoauthserver
Category
Security & Safety
Security & Safety
Stars
★ 18
★ 81
License
MIT
AGPL-3.0
Install Command
brew tap ashlrai/phantom && brew trust --formula ashlrai/phantom/phantom && brew install ashlrai/phantom/phantom
export AUTHPLANE_ADMIN_API_KEY="$(openssl rand -hex 32)" && export AUTHPLANE_SESSION_SECRET="$(openssl rand -hex 32)" && docker run -p 9000:9000 -p 9001:9001 -e AUTHPLANE_ADMIN_API_KEY -e AUTHPLANE_SESSION_SECRET -e AUTHPLANE_CLIENT_CREDENTIALS_ENABLED=true -e AUTHPLANE_DPOP_ENABLED=true -e AUTHPLANE_TOKEN_EXCHANGE_ENABLED=true -v authserver-data:/data authplane/authserver:latest serve
Updated
4d ago
1w ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
AI Agent Security, Secrets Management, Credential Protection
Authorization Server, OAuth 2.1, Identity Management
03

Features

phantom-secrets logophantom-secrets
01Reduces AI agent credential exposure risk by isolating secrets from agent context.
02Quick and easy local setup without requiring an account or custom CA.
03Native integrations with popular AI coding agents like Claude Code, Cursor, and Codex.
04Secure encrypted vault leveraging OS credential stores or an encrypted-file fallback.
05Tamper-evident audit log for security monitoring and integrity verification.
authserver logoauthserver
01Spec-compliant access tokens for any MCP server in any language.
02Federation to existing OIDC-compliant Identity Providers (IdP) like Google, Okta, Azure AD.
03Agent-to-agent delegation with audit logging and act-claim chains.
04Built-in Admin UI for managing everything from a browser, embedded in the same binary.
05Production-grade storage (PostgreSQL) and observability (OpenTelemetry, Prometheus, Helm chart).
04

Use Cases

phantom-secrets logophantom-secrets
↳Securing API keys and sensitive credentials for AI coding agents in development workflows.
↳Preventing credential leaks in agent contexts, transcripts, tool calls, and generated files.
↳Local development of AI-powered applications requiring secure access to external APIs.
↳Facilitating secure team collaboration on projects with shared secrets and AI agent involvement.
authserver logoauthserver
↳Securing new or existing Model Context Protocol (MCP) servers.
↳Integrating with existing Identity Providers for centralized user management.
↳Enabling secure agent-to-agent communication and delegated access.
↳Storing and vending refresh tokens for upstream providers (e.g., GitHub, Google, Slack).
FAQ

FAQ

What is the difference between phantom-secrets and authserver?
Both phantom-secrets and authserver are in the Security & Safety category. phantom-secrets has 18 stars, while authserver has 81 stars.
Which is better, phantom-secrets or authserver?
The best choice depends on your use case. Choose phantom-secrets if Securing API keys and sensitive credentials for AI coding agents in development workflows., and authserver if Securing new or existing Model Context Protocol (MCP) servers..
Is phantom-secrets free or open source?
Yes, phantom-secrets is open source on GitHub (MIT).
Is authserver free or open source?
Yes, authserver is open source on GitHub (AGPL-3.0).
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Alternatives to phantom-secrets →Alternatives to authserver →phantom-secrets details →authserver details →