signals

Explain one approved FormulaSignal Signal: a confirmed, reviewed change between two comparable product states.

Explain one approved FormulaSignal Signal: a confirmed, reviewed change between two comparable product states.

When to use. Use when a product record or history response named a signal_id and you need the before state, the after state, the observation window, and the evidence.

What it cannot provide. It has no access to unreviewed candidates, review deliberation, or the internal review queue. A signal_id that is not approved returns not found.

Requires the signals:read scope. Each distinct signal named in a successful answer spends one unit of the key's daily signal budget. Asking twice about the same one costs once.

get/api/v1/signals/{signal_id}

Request

  • Base URL: https://formulasignal.com
  • URL: https://formulasignal.com/api/v1/signals/{signal_id}
  • Auth: HTTP bearer

Path parameters

signal_idstring required

The signal id.

Headers

X-FormulaSignal-Origin'api' | 'mcp'

Optional attribution: mcp when the call comes from the FormulaSignal MCP server, api otherwise. Self-reported and recorded on the usage row so a customer can see which surface their traffic came from. Nothing reads it to decide what a caller may do, so a wrong value costs only the accuracy of that customer's own reporting.

Response

A FormulaSignal answer. status says what kind of answer it is, and every value except supported is still a real answer about the Record rather than a fact about the product.

request_idstring required
capabilitystring required
status'supported' | 'partial' | 'stale' | 'under_review' | 'ambiguous' | 'unsupported' | 'refused' required

What kind of answer this is. Every value except supported is still a real answer about the Record rather than a fact about the product.

summarystring required

One sentence saying what kind of answer this is.

signalsobject[]
comparisonobject
coverageobject
ledgerobject
watchobject
next_cursorstring nullable
limitationsstring[] required

Always present, including when empty. Read it.

record_versionstring required

The Record data-state id. Two answers sharing it came from one committed state.

record_as_ofstring date required
record_timestampstring date-time required

The newest dated observation the Record holds. Deliberately not "now".

methodology_versionstring required
disclaimerstring required

Example response

{
  "methodology_version": "record-v1",
  "disclaimer": "FormulaSignal provides evidence-backed supplement information and does not provide individualized medical advice."
}

Changes

No recorded changes to this operation across all 1 revision of this API.