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GET
Pre-check POS JWT freshness without making a money call

Authorizations

Authorization
string
header
required

POS terminal JWT minted by /auth/token; carries integrationId + terminal/cashier claims (server-trusted).

Response

Validity verdict. A valid OR an invalid/expired token both return 200 (this is a freshness check, not an auth gate).

The standard response envelope that every enveloped endpoint serializes through. ok is a boolean discriminator: when ok is true, the typed result is carried in data; when ok is false, a typed error object is returned instead. The meta object is uniform across the entire API surface.

ok
boolean
required
meta
object
required

The uniform response metadata block returned on every response. data_completeness_score is computed per call and reports the completeness of the returned data. decision_trace_id is present on responses that carry decision or insight output and can be used to correlate the response with its reasoning. capabilities is an additive, response-level array of hints advertising features the caller may use, and may be extended over time without notice.

data
object

Result of a non-mutating POS JWT freshness check. A valid AND an invalid token both return HTTP 200 with this body.

error
object | null

The typed error object returned with every non-2xx response. code is a string enum (for example WALLET_PROGRAM_AMBIGUOUS, CREDENTIAL_TYPE_UNSUPPORTED, INSUFFICIENT_FUNDS, IDEMPOTENCY_KEY_REUSED, CURRENCY_NOT_SUPPORTED), never a bare HTTP status number. Inspect code for programmatic branching, not the HTTP status. Some codes echo the valid set in details so clients can present or reconcile the accepted values: for example CREDENTIAL_TYPE_UNSUPPORTED lists the supported credential types, CURRENCY_NOT_SUPPORTED lists the supported ISO-4217 currencies, and WALLET_PROGRAM_AMBIGUOUS lists the candidate wallet_program_id values that matched the request.