
Amazon Music
8.9#1 in music streaming servicesFrom $5.99 a monthFree planAndroidiOSWebAPI
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| Fact | Amazon Music | Napster |
|---|---|---|
| API authentication | V2 requires Login With Amazon OAuth 2.0 bearer tokens and a stable X-Amzn-Device-Id header, with scopes such as music::catalog and music::library:read. | API keys are scoped to an organization and project, sent in X-Api-Key headers and required to remain server-side. |
| API limits | Playback endpoints can return HTTP 429 with MAX_CONCURRENCY_REACHED when a user's concurrent stream limit is exceeded. | Napster documents a one-request-per-second key rate limit, five concurrent sessions per transport, twenty total concurrent sessions, 100 agents per organization and 30 knowledge files per collection. |
| Developer documentation | The developer portal documents API fundamentals, authentication, pagination, errors, playback, DRM, audio formats and resource-specific references. | Documentation includes quickstarts, authentication, limits, channel guides, SDK examples, webhooks, migration notes and endpoint reference. |
| Free plan | Yes | Yes |
| Rating on Apple App Store | 4.7 out of 5 from 3.4 million ratings | 4.4 out of 5 from 15K ratings |
Amazon Music suits listeners who want free music and podcasts, Prime members looking for ad-free listening, and Unlimited subscribers seeking on-demand access, downloads, or higher-quality audio. Alexa users can also make spoken music requests on compatible devices.
Napster may suit people looking for AI-assisted music and personal sessions, businesses seeking a website agent, or developers building audio, video, or telephony agents. Its varied offerings span consumer, business, and developer use.