Idempotency Key
A client-supplied identifier that lets a server safely de-duplicate retried write operations.
Related terms in APIs
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Payment APIs
The developer-facing surface of modern payments.
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How Pix Works
Brazil's instant payments rail and the model the world is copying.
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BaaS
Banking-as-a-Service - the delivery of regulated banking primitives through APIs by a licensed sponsor bank to a non-bank distributor.
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Embedded Finance
The delivery of regulated financial products inside non-financial software experiences via APIs.
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HSM
Hardware Security Module - a tamper-resistant device that performs cryptographic operations and protects keys.
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AI Payments
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From Apple Pay to super apps: how tokenized credentials replaced the plastic card.
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Understanding Network Tokenization
A grounded explainer of how scheme-issued tokens work, why they matter, and what merchants need to do to benefit.