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With.in — Vendor-Side Auth Proxy for AI Agents

Lead generation through AI agent authentication workflows

With.in — Vendor-Side Auth Proxy for AI Agents architecture schematic

One example subsystem from this build. In most engagements we deliver the entire stack top to bottom — application code, Docker, infrastructure, deployment, and scaling — all in-house. Where a client already has platform teams in place, we work alongside them.

Project Summary

Vendor-side proxy infrastructure enabling lead generation through AI agent workflows. When an agent encounters a tool it lacks credentials for, With.in provides sign-in link generation, lead capture (give-to-get model), and session token issuance. Features a 6-state FSM lifecycle and 4 distinct authentication scenarios.

Our role: Architecture & Development

What We Did

  • 6-state FSM lifecycle for authentication flows
  • 4 authentication scenarios (no creds, vendor only, Within only, both)
  • SSE event stream for real-time visibility
  • Pyright strict mode — full type safety

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