TRACK REASONING • MEASURE AUTONOMY • IMPROVE AGENTS • SHARPEN YOUR SYSTEMS • TRACK REASONING • MEASURE AUTONOMY • IMPROVE AGENTS • SHARPEN YOUR SYSTEMS • TRACK REASONING • MEASURE AUTONOMY • IMPROVE AGENTS • SHARPEN YOUR SYSTEMS • TRACK REASONING • MEASURE AUTONOMY • IMPROVE AGENTS • SHARPEN YOUR SYSTEMS •

FOUNDING BETA — NOW OPEN

Observable Agency
for AI Systems

Thoughtbox is an intention ledger. When an agent causes a failure, you get the black box recording — what it was reasoning, what it considered, and why it decided what it did.

JOIN THE BETA READ QUICKSTART

CONNECT IN SECONDS

# ADD THOUGHTBOX TO YOUR MCP CLIENT CONFIG

{
  "mcpServers": {
    "thoughtbox": {
      "type": "http",
      "url": "https://mcp.kastalienresearch.ai/mcp?key=tbx_YOUR_API_KEY"
    }
  }
}

THE AUDIT TRAIL
YOUR AGENTS MISS

AGENTS ARE EPHEMERAL. THOUGHTBOX CAPTURES THE REASONING THAT DISAPPEARS WHEN THE SESSION ENDS.

Replayable reasoning traces

Every session is a numbered, timestamped chain of thoughts. Reconstruct exactly what the agent was reasoning about when it took any action.

Branch visualization

See where the agent explored alternatives, forked into parallel paths, and converged on a decision. Topology is visible, not hidden.

Code Mode

Two MCP tools replace dozens. Agents write JavaScript against the tb SDK to search, record, and analyze — no context window bloat.

Knowledge graph

Entities, relations, and observations accumulate across sessions. Prior experience surfaces automatically to new agents.

KNOW WHY THEY DECIDED WHAT THEY DID

FREE THROUGH MAY 10. FULL ACCESS, NO CREDIT CARD. START RECORDING AGENT REASONING TODAY.

JOIN THE FOUNDING BETA

Observable Agencyfor AI Systems