# Licensing > An index and topic collection covering software licensing APIs across two intersecting domains: open-source license metadata and code-license detection (SPDX, OSI license list, ChooseALicense, FOSSology, ScanCode, ClearlyDefined, the GitHub License API, and Software Composition Analysis tooling f... This is the **Licensing** topic area of [API Evangelist](https://apievangelist.com) — a network of focused knowledge bases drawn from 16 years of independent API research by Kin Lane. Browse all areas at https://apievangelist.com/areas/. ## Services & Tools - [Amazon License Manager](https://providers.apis.io/providers/amazon-license-manager/) (repo: https://github.com/api-evangelist/amazon-license-manager) - [Anchore](https://providers.apis.io/providers/anchore/) (repo: https://github.com/api-evangelist/anchore) - [Binadox](https://providers.apis.io/providers/binadox/) (repo: https://github.com/api-evangelist/binadox) - [Certero](https://providers.apis.io/providers/certero/) (repo: https://github.com/api-evangelist/certero) - [Cleanshelf](https://providers.apis.io/providers/cleanshelf/) (repo: https://github.com/api-evangelist/cleanshelf) - [CloudEagle.ai](https://providers.apis.io/providers/cloudeagle/) (repo: https://github.com/api-evangelist/cloudeagle) - [CloudNuro](https://providers.apis.io/providers/cloudnuro/) (repo: https://github.com/api-evangelist/cloudnuro) - [Corma](https://providers.apis.io/providers/corma/) (repo: https://github.com/api-evangelist/corma) - [Flexera](https://providers.apis.io/providers/flexera/) (repo: https://github.com/api-evangelist/flexera) - [FOSSology](https://providers.apis.io/providers/fossology/) (repo: https://github.com/api-evangelist/fossology) - [GitHub](https://providers.apis.io/providers/github/) (repo: https://github.com/api-evangelist/github) - [JFrog](https://providers.apis.io/providers/jfrog/) (repo: https://github.com/api-evangelist/jfrog) - [LICENSE.md](https://providers.apis.io/providers/license-md/) (repo: https://github.com/api-evangelist/license-md) - [Manifest Cyber](https://providers.apis.io/providers/manifest-cyber/) (repo: https://github.com/api-evangelist/manifest-cyber) - [Mendix](https://providers.apis.io/providers/mendix/) (repo: https://github.com/api-evangelist/mendix) - [OpenChain](https://providers.apis.io/providers/openchain/) (repo: https://github.com/api-evangelist/openchain) - [OpenSSF](https://providers.apis.io/providers/openssf/) (repo: https://github.com/api-evangelist/openssf) - [Sastrify](https://providers.apis.io/providers/sastrify/) (repo: https://github.com/api-evangelist/sastrify) - [Snow Software](https://providers.apis.io/providers/snow-software/) (repo: https://github.com/api-evangelist/snow-software) - [Snyk](https://providers.apis.io/providers/snyk/) (repo: https://github.com/api-evangelist/snyk) - [SoftwareOne](https://providers.apis.io/providers/softwareone/) (repo: https://github.com/api-evangelist/softwareone) - [Sonatype](https://providers.apis.io/providers/sonatype/) (repo: https://github.com/api-evangelist/sonatype) - [SPDX](https://providers.apis.io/providers/spdx/) (repo: https://github.com/api-evangelist/spdx) - [Spendflo](https://providers.apis.io/providers/spendflo/) (repo: https://github.com/api-evangelist/spendflo) - [Suger](https://providers.apis.io/providers/suger/) (repo: https://github.com/api-evangelist/suger) - [Synopsys](https://providers.apis.io/providers/synopsys/) (repo: https://github.com/api-evangelist/synopsys) - [Trelica](https://providers.apis.io/providers/trelica/) (repo: https://github.com/api-evangelist/trelica) - [Veracode](https://providers.apis.io/providers/veracode/) (repo: https://github.com/api-evangelist/veracode) ## Common Features - **Open Source License Metadata**: Authoritative catalogs and identifiers for open-source licenses, including the SPDX License List, OSI-approved licenses, and ChooseALicense.com, exposed via APIs so tools can resolve canonical license identifiers, texts, and obligations. - **Source Code License Detection**: Scanners such as ScanCode, FOSSology, and ClearlyDefined inspect source trees, package manifests, and binary artifacts to detect declared and inferred licenses across millions of files and report them in SPDX or similar formats. - **Software Composition Analysis**: SCA platforms like Snyk, Sonatype, Synopsys Black Duck, JFrog Xray, Veracode SCA, and Anchore inventory open-source dependencies, attribute licenses to each component, and flag policy violations across build pipelines. - **SBOM and License Attribution**: Software Bill of Materials tooling generates SPDX or CycloneDX documents that include per-component license declarations, enabling downstream attribution, NOTICE file generation, and regulatory disclosure. - **Commercial License Activation and Entitlement**: Entitlement platforms such as Cryptlex, Keygen, LicenseSpring, Zentitle by Nalpeiron, Sentinel by Thales, Reprise, and Flexera FlexNet Operations issue, activate, validate, and revoke license keys for commercial software. - **License Metering and Floating Licenses**: OpenLM, FlexNet, and Reprise track concurrent usage of floating and named-user licenses for engineering and design software, exposing utilization, denial, and check-out events through APIs. - **SaaS License Management**: SaaS management platforms like Snow Software, SoftwareOne, Trelica, CloudEagle.ai, Sastrify, Spendflo, CloudNuro, Cleanshelf, Corma, Certero, and Binadox discover SaaS subscriptions, reconcile seat usage, and reclaim unused licenses. - **Marketplace Entitlement and Co-Sell**: Cloud marketplace and metering APIs from Amazon License Manager and Suger let ISVs grant, meter, and revoke buyer entitlements purchased through AWS, Azure, and GCP marketplaces. ## Use Cases - **Open Source License Compliance**: Engineering and legal teams scan repositories and build artifacts with FOSSology, ScanCode, Snyk, or Synopsys Black Duck to attribute licenses to every dependency and prove compliance with copyleft and attribution obligations. - **SBOM Generation for Regulated Industries**: Vendors generate SPDX or CycloneDX SBOMs that embed license declarations to satisfy U.S. Executive Order 14028, the EU Cyber Resilience Act, and medical-device, automotive, and federal procurement requirements. - **Commercial License Activation**: ISVs ship desktop and embedded software that calls Cryptlex, Keygen, LicenseSpring, or FlexNet APIs at startup to activate, validate, and periodically re-check license entitlements against a hardware fingerprint. - **Floating License Pools for Engineering Tools**: CAD, EDA, and scientific computing teams meter concurrent usage of expensive seats through OpenLM, FlexNet, and Reprise license servers, exposing real-time utilization through APIs to optimize seat counts. - **SaaS Spend and License Optimization**: IT and finance teams use SaaS management platforms to discover shadow SaaS, reconcile seats against active users, and reclaim or right-size licenses to cut software spend. - **Cloud Marketplace Entitlement Provisioning**: ISVs listed on AWS, Azure, and GCP marketplaces use Amazon License Manager and Suger to grant access to customers who purchase through the marketplace and to meter consumption-based billing. - **Repository License Surfacing**: Code hosts like GitHub expose detected license metadata via the GitHub License API so downstream tooling can resolve a project's license without re-scanning source. - **License Policy Enforcement in CI**: SCA gates in CI block builds that introduce dependencies under restricted licenses (AGPL, SSPL) using policies defined in Snyk, Sonatype, Synopsys, JFrog Xray, or Anchore. ## Related Areas - [SaaS Management](https://saas-management.apievangelist.com): SaaS Management covers the tools, platforms, and practices used by organizations to discover, manage, optimize, and s... - [Regulation](https://regulation.apievangelist.com): Regulation encompasses the rules, laws, and standards established by governments, agencies, and standards bodies that... - [Gateway](https://gateway.apievangelist.com): A collection of services, tooling, and open source solutions for API gateway management and traffic control, covering... - [FinOps](https://finops.apievangelist.com): FinOps is a cloud financial management discipline combining technology, finance, and business practices to drive acco... - [Unified APIs](https://unified-apis.apievangelist.com): This is the index of unified API service and tooling repos being tracked by the API Evangelist network. Unified APIs ... - [Management](https://management.apievangelist.com): An index and topic collection covering full-stack API management platforms — solutions that combine an API gateway, d... ## More - [Latest Licensing stories](/stories/) - [All API Evangelist topic areas](https://apievangelist.com/areas/) - [API Evangelist network index (llms.txt)](https://apievangelist.com/llms.txt)