generated: '2026-08-29'
method: probed
source: >-
  Live probes of portal.amark.com and trading.amark.com; no provider documentation exists
  to search.
provider: A-Mark Precious Metals
providerId: a-mark-precious-metals
description: >-
  A-Mark documents no API conventions. The few entries that can be asserted here come from
  observable behaviour of the trading portal and its backing Web API; the rest are
  recorded as undocumented rather than guessed. Nothing in this file is inferred from
  marketing copy.
auth:
  style: oauth2-password-grant
  header: 'Authorization: Bearer <token>'
  token_endpoint: https://portal.amark.com/connect/token
  detail: >-
    Confidential client + resource-owner credentials. See
    authentication/a-mark-precious-metals-authentication.yml.
  source: https://portal.amark.com/.well-known/openid-configuration
idempotency:
  supported: unknown
  header: null
  scope: null
  retention: null
  note: >-
    No idempotency header, key or retry contract is documented, and none can be observed
    without portal credentials. Recorded as unknown — NOT as absent, and no `Idempotency`
    pointer is wired, because asserting either way would be a guess.
pagination:
  style: undocumented
  note: The backing Web API is unreachable anonymously; no pagination contract observable.
versioning:
  style: uri-path
  current: v1
  note: >-
    Observed only — trading.amark.com routes /v1/* into its Web API. No versioning policy
    is published. See lifecycle/a-mark-precious-metals-lifecycle.yml.
error_envelope:
  shape: proprietary
  example_field: Message
  observed: >-
    '{"Message":"No HTTP resource was found that matches the request URI
    ''https://trading.amark.com:8444/v1/openapi.json''."}' — the ASP.NET Web API default
    envelope. Note it leaks the internal origin host and port (:8444) to anonymous callers.
  problem_json: false
  source: https://trading.amark.com/v1/openapi.json
rate_limit_signaling:
  headers: []
  note: >-
    No X-RateLimit-*, RateLimit-* or Retry-After headers observed on any anonymous
    response. See rate-limits/a-mark-precious-metals-rate-limits.yml.
request_id_tracing:
  supported: unknown
  note: No correlation/request-id header documented or observed anonymously.
metadata: {supported: unknown}
field_expansion: {supported: unknown}
dry_run_mode:
  supported: na
  note: >-
    No publicly reachable write surface, so there is nothing to rehearse against. `na`
    rather than a zero.
reversibility:
  grade: na
  applicable: false
  detail: >-
    A-Mark exposes no public write API. The trading write surface (placing, amending and
    cancelling metals orders) exists behind the A-Mark Trading Portal login at
    portal.amark.com and is unreachable without dealer credentials, so no reversal
    operation, operationId or reversal window can be read from any published source.
    Reversal terms in the wholesale business are contractual, not API-level: A-Mark's own
    /risk/ page states that under its customer agreements A-Mark itself holds the option
    to "buy in" a customer's short position to protect against a widening deficit — a
    unilateral A-Mark right, not a customer-callable undo. Because no write surface is
    publicly callable, reversibility, dry_run_mode and idempotency-as-a-runtime-contract
    are all `na` here and stay in the denominator rather than scoring zero.
    NO REVERSAL WINDOW IS RECORDED because A-Mark publishes none; inventing one for a
    physical-settlement metals trade could cost a reader real money.
  operations: []
  window: null
  evidence:
    - url: https://portal.amark.com/login
      http_status: 200
      note: portal login — the only door to the write surface
    - url: https://www.amark.com/risk/
      http_status: 200
      note: contractual "buy in" language; an A-Mark right, not an API reversal
cross_references:
  - authentication/a-mark-precious-metals-authentication.yml
  - scopes/a-mark-precious-metals-scopes.yml
  - lifecycle/a-mark-precious-metals-lifecycle.yml
  - rate-limits/a-mark-precious-metals-rate-limits.yml
  - conformance/a-mark-precious-metals-conformance.yml
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com