Integrity

Select an attested source observation as of a date

Public dataset-grain point-in-time read using methodology as-of-snapshot/v2. Only source observations with a matching usable SHA-256 attestation are selectable. The returned half-open selection window identifies which stored observation answers the requested date; it does not prove that the upstream source changed or remained unchanged between observations. Evidence-storage failures return 500 instead of a partial record.

get/api/v1/as-of/{source_id}

Request

  • Base URL: https://fonteum.com
  • URL: https://fonteum.com/api/v1/as-of/{source_id}
  • Auth: none required

Path parameters

source_id'oig_leie' | 'nppes' | 'pecos_ppef' | 'cms_pos_facilities' | 'cms_care_compare_nh' | 'cms_qpp_mips_individual' | 'cms_open_payments' | 'cms_care_compare_dialysis' | 'cms_care_compare_hospice' | 'cms_civil_money_penalties' required

Curated source_snapshots namespace exposed by GET /api/v1/as-of discovery.

Query parameters

string date
OR
string date-time

ISO date or timestamp for the point-in-time selection. Defaults to the current time; the legacy at query alias is also accepted.

Response

Attested as-of result. Coverage states such as no_attested_captures are successful reads and remain HTTP 200.

status'found' | 'before_tracking' | 'no_captures' | 'no_attested_captures' required

found selects an attested observation; before_tracking predates public attested coverage; no_captures means no stored observations exist; no_attested_captures means stored observations exist but none satisfy the public attestation boundary.

as_ofstring date required

Requested point in time normalized to a UTC date.

methodology_version'as-of-snapshot/v2' required

Changes

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