API Schema
API Schema is the formal definition of the structure, types, required fields, constraints, and relationships in API messages. It is used to…
Developers, APIs & Integrations
Developer tools, APIs, webhooks, SDKs and technical integrations.
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Terms (302)
API Security Misconfiguration
API Security Misconfiguration is a security weakness caused by unsafe, incomplete, inconsistent, or default configuration in an API gateway, application, cloud service,…
API Security Testing
API Security Testing is the structured evaluation of an API for authentication, authorization, input, business-logic, data-exposure, configuration, and availability weaknesses. It goes…
API Testing
API Testing is the systematic validation of API functionality, contracts, security, performance, and failure behavior. It is used to confirm that providers…
API Token
An API token is a credential value presented with API requests to represent an authenticated client, user, session, or delegated set of…
API Version
API Version is an identifier for a defined release or compatibility boundary of an API’s contract and behavior. It is used to…
API Version Compatibility
API Version Compatibility is the ability of a client, server, or integration built for one API version to operate correctly with another…
API Versioning
API versioning is the strategy for identifying, releasing, supporting, evolving, and retiring distinct API contracts as interfaces or behavior change. Developers using…
Application Binary Interface (ABI)
An ABI is a machine-readable contract describing how software encodes calls, arguments, return values, and events when interacting with compiled code. Application…
Application Programming Interface (API)
An API is a defined interface that lets software request data or actions from another component without depending on its internal implementation.…
At-Least-Once Delivery
At-Least-Once Delivery is a message-delivery guarantee in which the system keeps retrying until delivery is acknowledged, so a message should arrive but…
At-Most-Once Delivery
At-Most-Once Delivery is a delivery approach in which each message is attempted no more than once, preventing redelivery but allowing messages to…
Authentication Error
Authentication Error is an API error indicating that the caller’s identity or credential could not be established with the required level of…
Authorization Endpoint
Authorization Endpoint is the OAuth authorization-server endpoint where a client directs a resource owner to approve or deny a requested authorization. It…
Authorization Header
Authorization Header is an HTTP request header used to carry credentials that authorize access to a protected resource, such as a bearer…
Automatic Retry
Automatic Retry is a client or service behavior that repeats a failed or indeterminate operation without requiring a person to initiate each…
Backpressure
Backpressure is a flow-control mechanism that prevents producers from overwhelming consumers, queues, databases, or downstream APIs when work arrives faster than it…
Backward-Compatible Change
Backward-Compatible Change is a modification that allows existing conforming clients to continue operating without mandatory code or configuration changes. It describes a…
Balance Query
Balance Query is an API or RPC request that returns one or more balance values for an account, wallet, asset, or ledger…
Bank Integration
Bank integration connects an application with banking systems to initiate, receive, track, reconcile, or report financial transactions and account information. Bank Integration…
Bitcoin RPC
Bitcoin RPC is the remote procedure call interface used by software to query and control a Bitcoin Core node or wallet through…
Blockchain API
A blockchain API is a software interface that lets applications query blockchain data, submit transactions, monitor events, or interact with network services…
Blockchain Integration Testing
Blockchain Integration Testing is the verification of application behavior across wallets, nodes, smart contracts, token programs, networks, and off-chain services used in…
Blockchain SDK
A blockchain SDK, or software development kit, is a collection of libraries, tools, types, examples, and documentation that helps developers build applications…