generated: '2026-09-19'
method: searched
source: https://scvd.store/auth.md
derived_from: openapi/scvd-store-openapi.json
docs:
- https://scvd.store/auth.md
- https://scvd.store/.well-known/oauth-protected-resource
- https://scvd.store/developers
summary:
  types:
  - none (anonymous)
  - x402 payment signature (per-call)
  - http bearer (one narrow scope)
  - http basic (back office, not for agents)
  identity_types_supported:
  - anonymous
  api_key_in: []
  oauth2_flows: []
  registration_required: false
  signup_url: null
  api_key_url: null
statement: '"There is no account here. No key to request, no signup form, no approval queue, no waitlist, no tier
  you get promoted into." (auth.md). The RFC 9728 document encodes the same: identity_types_supported [anonymous],
  register_uri / claim_uri / revocation_uri null, bearer_methods_supported [], scopes_supported [], and NO authorization_servers
  because no OAuth server exists.'
schemes:
- name: anonymous
  type: none
  applies_to: 'every free door: preflight, conformance, look, before-you-pay, verify, corpus and datasets, menu,
    openapi.json, MCP tools/list + resources/read + the 14 free tools, all three A2A skills'
  description: Send the request. "If a request to one of these fails, it failed for a reason printed in the body
    — never because you were not recognised."
  sources:
  - https://scvd.store/auth.md
  - well-known/scvd-store-oauth-protected-resource.json
- name: x402_payment_signature
  type: payment (x402 v2)
  in: header
  header: PAYMENT-SIGNATURE (legacy X-PAYMENT honoured); over MCP _meta['x402/payment']; over MPP the org.paymentauth/credential
    meta key
  challenge: HTTP 402 with PAYMENT-REQUIRED (base64 x402 v2 terms) and WWW-Authenticate naming resource_metadata;
    JSON-RPC error 402 over MCP
  applies_to: the 35 GET /api/buy/{item} doors, the publication pages and the six buy_* MCP tools
  description: '"That signature IS the credential: it authenticates nothing about who you are, and it does not have
    to — it settles the call it paid for and it is good for that call only." Settled in USDC on Base, Polygon, Arbitrum,
    World or Solana via the Coinbase CDP facilitator; the store never holds funds. Revocation: nothing to revoke
    — a payment authorises exactly one call.'
  safety: Idempotency-Key (16–128 chars; suggested_key in every 402) prevents a retry loop from double-charging;
    the store delivers first and settles after so a failed delivery takes no money.
  sources:
  - https://scvd.store/auth.md
  - openapi x-payment-info on each door
  - live 402 on GET /api/buy/small_blessing 2026-09-19
- name: purchaseStatusToken
  type: http
  scheme: bearer
  applies_to:
  - get_api_purchase_status_purchase_id
  description: Private recovery.status_token returned by a catalogue purchase. This capability reads only its original
    purchase status. (The only securityScheme declared in the OpenAPI; MCP check_purchase takes it as status_token.)
  sources:
  - openapi/scvd-store-openapi.json
- name: trade_hmac
  type: hmac
  in: headers
  headers:
  - X-Trade-Key
  - X-Trade-Timestamp
  - X-Trade-Nonce
  - X-Trade-Signature
  algorithm: sha256=HMAC-SHA256(secret, timestamp.nonce.body); 300-second window; nonce replay refused
  applies_to:
  - post_api_trade_partner_item_id
  - get_api_trade_partner_claim
  - get_api_trade_partner_statement
  - post_api_trade_partner_check
  - post_api_trade_sandbox_item_id
  - post_api_trade_sandbox_check
  description: Reseller (trade counter) accounts only; secrets are issued out of band by the keeper. A sandbox account
    with a published secret exists for exercising the dialect (see sandbox/).
  note: Not declared as a securityScheme in the OpenAPI (the trade operations declare 401/409 responses); documented
    at /api/trade/contract.
  sources:
  - https://scvd.store/api/trade/contract
- name: keeper_basic
  type: http
  scheme: basic
  applies_to:
  - /admin (not in the contract)
  description: '"HTTP Basic, one human''s password … no agent has business behind it, no credential for it is issued
    to anyone, and a failed attempt is throttled per address and raises an alarm." Listed because a scanner will
    find the 401.'
  sources:
  - https://scvd.store/auth.md
discovery:
  protected_resource_metadata: https://scvd.store/.well-known/oauth-protected-resource
  authorization_servers: null
  openid_configuration: '404'
  oauth_authorization_server: '404'
  www_authenticate_on_402: X402 resource_metadata="<origin>/.well-known/oauth-protected-resource" per the spec header
    description; observed as a Payment challenge (MPP) on 2026-09-19
what_the_store_never_asks_for: credentials, API keys, seed phrases, private keys, or wallet secrets — "Anything
  that asks you for one of those while claiming to be this store is not this store."