generated: '2026-07-18'
method: searched
source: https://docs.services.butterpayments.com/authentication
docs: https://docs.services.butterpayments.com/authentication
summary:
  types: [apiKey, http, hmac]
  api_key_in: [header]
  api_key_header: x-api-key
  webhook_signing: HMAC-SHA256
  notes: >-
    No machine-readable OpenAPI is published; this profile is captured from the
    Recover Enterprise API authentication documentation.
schemes:
  - name: ButterApiKey
    type: apiKey
    in: header
    parameter: x-api-key
    applies_to: Recover Enterprise API (Butter-hosted endpoints)
    provisioning: Butter issues API keys per environment (sandbox and production) during the integration phase.
    example: "curl 'https://api.butterpayments.com/recover/payments' --header 'x-api-key: <BUTTER_API_KEY>'"
    sources: [https://docs.services.butterpayments.com/authentication]
  - name: MerchantApiKey
    type: apiKey
    in: header
    parameter: x-api-key
    applies_to: Merchant-provided endpoints (Retry Status, Retry Results, End of Dunning)
    notes: Merchants may secure their own inbound endpoints with an API key shared with Butter.
    sources: [https://docs.services.butterpayments.com/authentication]
  - name: MerchantBasicAuth
    type: http
    scheme: basic
    applies_to: Merchant-provided endpoints
    notes: HTTP Basic (base64 username:password) is a supported scheme for merchant endpoints.
    sources: [https://docs.services.butterpayments.com/authentication]
  - name: HTTPBasic
    type: http
    scheme: basic
    applies_to: Disputes / Data Collection API (api.disputes.services.butterpayments.com Ping health check)
    sources: [https://docs.services.butterpayments.com/ping]
  - name: WebhookSignature
    type: hmac
    algorithm: HMAC-SHA256
    applies_to: Butter-sent webhooks (Retry Results, End of Dunning, Disputes)
    signature_header: X-Butter-Webhook-Signature
    expiration_header: X-Butter-Webhook-Expiration
    signing: >-
      HMAC-SHA256 over "{json_payload}+{expiration}" using the Butter-provided signing
      secret as the key; compare to X-Butter-Webhook-Signature and verify X-Butter-Webhook-Expiration.
    sources: [https://docs.services.butterpayments.com/webhook-signature-verification]
ip_allowlisting:
  supported: true
  notes: Recover source IPs can be provided on request to allowlist inbound traffic.
vault_keys:
  merchant_key: Directs card element requests to a dedicated proxy and secure container.
  source_id: Represents a specific PSP account where card payment methods are created after vaulting.
  source: https://docs.services.butterpayments.com/api-key-provisioning