One platform between your agents and every API
Application code makes one call. Alter resolves the identity, checks the policy, injects the credential, forwards the request, and records what happened.
Four problems every integration has
Every app or agent that calls a third-party API solves the same four problems. Alter owns all of them behind one SDK call.
Storage
OAuth tokens and API keys live in a dedicated vault, encrypted at rest. Postgres holds metadata and references.
Retrieval
The right credential for the right caller, refreshed before it expires and injected into the request on the way out.
Authorization
Default-deny policy evaluated on every request: identity, scope, time, network, and rate, decided in real time.
Audit
Every credential use, policy decision, and provider call recorded with full attribution, tamper-evident and exportable.
Alter also catalogs each provider's API operations, so agents and operators can discover what a credential can do, in-band.
Four key features, and the record they leave
Credential Vault
OAuth tokens and API keys stored once, injected per request. Your code and your database never hold a credential.
Policy Engine
Default deny, down to the parameter: scopes, endpoints, time windows, rate quotas, and content rules on every request.
Agent Identity
Every agent gets its own identity and keys, narrowed scopes, and a delegation chain back to a real person.
Human in the loop
Sensitive calls pause for review by someone you name, then run exactly as approved.
Compliance & Audit
The full record of every call, kept as long as you need, with legal hold and exports.
Interfaces for developers, operators, and end users
Alter Connect
An embeddable widget where users authorize their own accounts under your branding. PKCE, state validation, and token exchange handled.
Wallet
The end-user surface. People see every connection made on their behalf, act on pending approvals, and revoke access in one click.
Developer tools (opens in a new tab)
Python and TypeScript SDKs with identical interfaces, a PAT-authenticated CLI, and an MCP server your coding agent can use to integrate Alter on its own.
Built on the standards you already run
Ready to secure your agents?
Book a 30-minute walkthrough with the founders.