原生适配你技术栈的 SDK 与集成。

Pick the language your service already runs on. Node and Python ship typed clients with one-call helpers (waitForSplit, verify_signature) and full method autocomplete; curl works on the same REST endpoints if you're prototyping or scripting from a shell. The hosted API is identical across all 13 distribution channels — same job ids, same webhooks, same per-minute billing.

No. Credit packs never expire — purchase $6.99 / 50 minutes, $15 / 150 minutes, or $39.99 / 500 minutes and the balance stays on your account until you spend it. There is no monthly subscription, no rollover cap, and no auto-renewal. The first 3 minutes are free with no card required, charged at $0.08–$0.14 per minute depending on pack size.

The default is htdemucs_ft (Demucs fine-tuned, 4-stem: vocals, drums, bass, other) — the same model variant the open-source community benchmarks at ~8.7 dB SDR. You can switch to htdemucs_6s for guitar and piano stems by passing model='htdemucs_6s' on submit. Models are named explicitly in every SDK so output quality is comparable to local Demucs runs.

The SDK clients are MIT-licensed and ship to npm, JSR, PyPI, Maven Central, Packagist, LuaRocks, SPM, and CocoaPods — fork or vendor them as you like. Inference itself runs on our managed GPUs against the hosted API at api.aistemsplitter.com — there is no on-prem inference image in v1, but the GHCR Docker image wraps the SDK for self-hosted orchestration.

Concurrent jobs and per-minute request caps live on /developers/api with the current numbers (they age, so they aren't pinned here). For large uploads, call presignUpload (Node) / presign_upload (Python) to get a direct-to-storage URL — the SDK handles retries with exponential backoff out of the box. Files up to 50 MB upload directly; larger files use multipart presigned URLs.

Pass webhook_url on createSplit. When the job finishes, the API POSTs an HMAC-SHA256-signed event to your URL with the stem download links inline. Verify the signature with one SDK call (verifyWebhook in Node, verify_signature in Python). The Webhooks section in each per-language quickstart shows runnable Express, Hono, FastAPI, and Flask handlers.

选择你的服务已经在用的语言。Node 和 Python 提供 typed clients，带一键 helper（waitForSplit、verify_signature）和完整 method autocomplete；如果你只是原型验证或从 shell 写脚本，curl 也走同一套 REST endpoints。托管 API 在全部 13 个分发渠道里保持一致——同样的 job ids、同样的 webhooks、同样的按分钟计费。

不会。积分包永不过期——购买 $6.99 / 50 分钟、$15 / 150 分钟或 $39.99 / 500 分钟后，余额会一直留在你的账户里直到用完。没有月订阅、没有 rollover 上限，也不会自动续费。前 3 分钟免费且无需绑卡，按包大小不同，每分钟 $0.08–$0.14。

默认是 htdemucs_ft（Demucs fine-tuned，4-stem：vocals、drums、bass、other）——这是开源社区 benchmark 约 8.7 dB SDR 的同一模型变体。提交时传入 model='htdemucs_6s'，即可切换到支持 guitar 和 piano stem 的模型。每个 SDK 都显式命名模型，所以输出质量可以和本地 Demucs 运行结果对齐比较。

SDK clients 使用 MIT license，并发布到 npm、JSR、PyPI、Maven Central、Packagist、LuaRocks、SPM 和 CocoaPods——你可以按需 fork 或 vendor。推理本身运行在我们托管 GPU 上，通过 api.aistemsplitter.com 的 hosted API 调用——v1 没有 on-prem 推理 image，但 GHCR Docker image 会包装 SDK，供 self-hosted orchestration 使用。

并发任务数和每分钟请求上限以 /developers/api 的当前数值为准（这些数字会变化，所以这里不固定写死）。大文件上传时，调用 presignUpload（Node）/ presign_upload（Python）获取 direct-to-storage URL——SDK 内置 exponential backoff retry。50 MB 以内文件可直接上传；更大的文件使用 multipart presigned URLs。

在 createSplit 里传 webhook_url。任务完成后，API 会向你的 URL POST 一个 HMAC-SHA256 签名事件，并在 payload 中直接带上 stem 下载链接。用一次 SDK 调用验证签名（Node 里 verifyWebhook，Python 里 verify_signature）。每个语言 quickstart 的 Webhooks 部分都提供可运行的 Express、Hono、FastAPI 和 Flask handlers。