Alpha MCPAPI reference · v1

The MCP your agents call.

Tritemporal memory that cannot lie about the past, a governed causal graph, knock-on simulation, and a decision ledger — the engine behind every Cascadian answer, at machine speed.

MCPPOSTGRESGOVERNED

Reference

Errors & Limits

Plain failures, plain headers. Every error body names the fix.

Errors

401 bad key · 404 unknown id · 409 invariant violation · 429 over limit.

Rate limits

Plan-based. X-RateLimit-Remaining on every response; 429s include Retry-After.

Deprecation

Announced, then dual-served 90 days. /v1 stays stable.

error shapeJSON

{
  "error": {
    "code": "identification_required",
    "message": "estimate() requires an identification_review_id.",
    "hint": "Call identify(treatment, outcome) first — invariant I3."
  }
}