Counterparty Check · Authentication Profile

Counterparty Check Authentication

Authentication

Counterparty Check declares 3 security scheme(s) across its OpenAPI definitions.

CompanyPaymentsFraud PreventionSanctions ScreeningComplianceAI AgentsMCPx402Know Your Counterparty
Methods: Schemes: 3 OAuth flows: API key in:

Security Schemes

apiKey http
scheme: bearer
x402 payment
mpp payment

Source

Authentication Profile

Raw ↑ 
generated: '2026-11-04'
method: searched
source: https://counterpartycheck.com/docs
docs: https://counterpartycheck.com/docs
spec: openapi/counterpartycheck-com-openapi.yml
schemes:
- name: apiKey
  type: http
  scheme: bearer
  description: Prepaid API key (cc_live_…), bought at /#pricing
  header: 'Authorization: Bearer cc_live_…'
  key_prefix: cc_live_
  obtain: Buy prepaid credit by card at https://counterpartycheck.com/#pricing; the key is issued immediately.
- name: x402
  type: payment
  description: No account. Call the endpoint without payment, get HTTP 402 with a PAYMENT-REQUIRED header, pay in USDC on Base (eip155:8453), retry with PAYMENT-SIGNATURE.
  documented_only: true
- name: mpp
  type: payment
  description: 'Machine Payments Protocol: the same 402 carries a WWW-Authenticate: Payment challenge for USDC on Tempo.'
  documented_only: true
notes:
- The MCP server at https://counterpartycheck.com/mcp uses a prepaid API key; screen_sanctions works without a key for 3 screens a day.
- POST /v1/receipts/verify and GET /pricing are free and need no payment.

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