Higher plan required

HTTP 403 · type: https://docs.signals.ai/errors/tier-required

The endpoint requires a higher plan than the key holds. The body carries required_tier.

What to do

Compare required_tier against your current plan and upgrade if the endpoint is one you need. Note that MCP tools are not plan-gated — every tool is callable on every plan, and plans differ only in how much you may call them.

The response shape

Every error is RFC 9457 application/problem+json and carries a request_id, which is also returned as the X-Request-Id header on every response, success or failure. Quote it when contacting support.

{
  "type": "https://docs.signals.ai/errors/tier-required",
  "title": "Higher plan required",
  "status": 403,
  "detail": "…",
  "request_id": "req_9f2c…",
  "instance": "/v1/…"
}

See all error types for the full catalog.