Direct-fetch strategy with subscription-key rotation.
Iterates configured IMF_API_PRIMARY_KEY → IMF_API_SECONDARY_KEY, retrying only on 401/403. Network errors short-circuit immediately.
IMF_API_PRIMARY_KEY
IMF_API_SECONDARY_KEY
401
403
Fully-qualified IMF SDMX URL.
HTTP context adapter.
Response body text on success.
The last HTTP/network error when all configured keys are exhausted.
Direct-fetch strategy with subscription-key rotation.
Iterates configured
IMF_API_PRIMARY_KEY→IMF_API_SECONDARY_KEY, retrying only on401/403. Network errors short-circuit immediately.