YC-backed Archal launches stateful API sandboxes for testing AI agents
Scobleizer · x · 2026-08-23
Archal (YC S26) launched stateful API sandboxes for AI agents: each sandbox includes 20+ stateful environments (Slack, Linear, Stripe, GitHub, Datadog, etc.) that behave like production APIs, so developers can test agent integrations without real test accounts.
The core loop is Create / Call / Inspect / Reset: every test run gets an isolated sandbox; changes persist across tool calls, then reset to a declared baseline. Use cases:
- Harness testing: isolated sandbox per run with persistent-then-reset state
- Integration testing: one sandbox per branch/CI job — no shared accounts, rate limits, or dirty state
- Agent training / RL: every rollout starts from an identical state while changes persist through the episode
Each sandbox exposes isolated REST and MCP endpoints, with request/response/mutation/usage inspection. Includes $20 in usage credits, no card required. Scoble quipped: keep your agents sandboxed — properly, so they don't want to escape.
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