Unknown symbol

HTTP 404 · type: https://docs.signals.ai/errors/unknown-symbol

The symbol is not in the served universe — it may be a fund, an ADR, an OTC listing, a delisted ticker, or simply a typo.

What to do

Resolve the company first with the search endpoint (or the search_companies MCP tool) and use the exchange-qualified symbol it returns, such as AAPL:US. A company we do not serve is deliberately indistinguishable from one that does not exist.

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/unknown-symbol",
  "title": "Unknown symbol",
  "status": 404,
  "detail": "…",
  "request_id": "req_9f2c…",
  "instance": "/v1/…"
}

See all error types for the full catalog.