Privileged access management
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Launch HN: Alter (YC S25) – Access control for multi-user agents
tool
3 min read
Alter provides privileged access management for AI agents, placing a vault, policy engine, agent identity controls, human approvals, and audit logging between agents and APIs. The platform stores credentials once and injects them into proxied requests, so agents can use credentials without directly seeing them or requiring keys in prompts, code, configuration files, or environment variables. Each agent receives its own identity, scopes, and user grants rather than relying on a shared, over-scoped credential. Alter checks requests against default-deny policies, including parameter-level rules, and can require approval from a named person for sensitive actions. It records which agent made a call, whose access it used, which policy applied, and who approved it. Organizations can revoke an agent, credential, or grant immediately, while identity-provider webhooks can cascade offboarding actions. Alter says one SDK call handles credential storage, refresh, policy, and auditing across 140 providers, with LangChain, MCP, and AWS integrations. Audit records can be streamed to SIEM systems. Credentials are kept in a dedicated encrypted secret store, while Postgres stores metadata and vault references rather than provider tokens. Alter says it uses fail-closed authorization, per-key isolation, proxy-only keys, and no plaintext credentials in logs. Its SOC 2 program is in progress.