{"status":"available_reference_rates","returned":1,"currency":"USD","year":2008,"requested_date":"2008-09-15","items":[{"id":"ecbh-2008-USD","domain":"historical_exchange_rates","data":{"base_currency":"EUR","currency":"USD","year":2008,"unit":"currency units per one euro","period":{"from":"2008-01-02","to":"2008-12-31"},"observations":[{"date":"2008-09-15","units_per_eur":1.4151,"source_decimal":"1.4151"}],"numeric_values":1,"missing_values":0,"available_period":{"from":"2008-01-02","to":"2008-12-31"},"frequency":"ECB publication days only; calendar days absent from source are not filled","original_data_free_url":"https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html","license_url":"https://www.ecb.europa.eu/services/using-our-site/disclaimer/html/index.en.html","transformation":"One currency and year selected from ECB CSV. Original decimal text preserved, N/A mapped to null, dates sorted ascending. No interpolation, forward fill, redenomination or cross rates.","notice":"Indicative historical reference rates, not executable transaction prices. A discontinued currency is not a current quote. Historical figures may be revised.","independently_verified":false,"returned_period":{"from":"2008-09-15","to":"2008-09-15"},"latest_available":{"date":"2008-09-15","units_per_eur":1.4151,"source_decimal":"1.4151"}},"freshness":{"observed_at":"2026-09-27T12:21:55.572Z","expires_at":"2026-11-01T12:21:55.572Z","age_seconds":25544,"meaning":"Age since the official source was retrieved, not proof that the underlying facts are unchanged."},"citation":{"url":"https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html","publisher":"European Central Bank — historical euro reference exchange rates","retrieved_at":"2026-09-27T12:21:55.572Z"},"provenance":{"source_id":"ecb-fx-history","source_name":"European Central Bank — historical euro reference exchange rates","source_url":"https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html","license":"ECB reuse terms: accurate reproduction, attribution, transformations disclosed. Original data is freely available from ECB. Reference rates are not executable transaction prices.","retrieved_at":"2026-09-27T12:21:55.572Z","verified_at":"2026-09-27T12:21:55.572Z","valid_until":"2026-11-01T12:21:55.572Z","verification_method":"official-source-schema-validation-v1","content_sha256":"b627db3f31c7f1e470f0fcb67d4fff558852c1c006e47467aa7e457b37d1f8c3","verification_level":"official_source_and_schema_checked","independently_verified":false,"verification_scope":["official_https_source","schema_validation","source_url_validation","snapshot_integrity","freshness_policy"]}}],"interpretation":{"exact_date_only":true,"missing_date":"No observation on that date in the source snapshot; no rate inferred or carried forward.","null_value":"Source N/A, never zero. Can indicate unavailable, not-yet-published or discontinued currency data.","independently_verified":false}}