files-sdk

A unified storage SDK for object and blob backends. One small, honest API. Web-standards I/O. An escape hatch when you need the native client.

Install

npm install files-sdk

Each provider's native SDK is an optional peer dependency — install only the ones you actually use, alongside files-sdk itself. A few examples:

# S3 (and any S3-compatible: R2, MinIO, DigitalOcean Spaces, Backblaze B2, Wasabi, …)
npm install files-sdk @aws-sdk/client-s3 @aws-sdk/s3-presigned-post @aws-sdk/s3-request-presigner

# Google Cloud Storage
npm install files-sdk @google-cloud/storage google-auth-library

# Azure Blob Storage
npm install files-sdk @azure/storage-blob @azure/core-auth @azure/identity

# Vercel Blob
npm install files-sdk @vercel/blob

See files-sdk.dev for the per-adapter install command. If you import an adapter without its peer installed, Node will throw ERR_MODULE_NOT_FOUND naming the missing package.

Quick start

import { Files } from "files-sdk";
import { s3 } from "files-sdk/s3";

const files = new Files({
  adapter: s3({ bucket: "uploads" }),
});

await files.upload("avatars/abc.png", file, { contentType: "image/png" });
const got = await files.download("avatars/abc.png");
const exists = await files.exists("avatars/abc.png");

Swap the adapter import (files-sdk/r2, files-sdk/gcs, files-sdk/azure, …) and the rest of your code stays the same.

File handles

Use files.file(key) when your application code works with the same object repeatedly:

const avatar = files.file("avatars/abc.png");

await avatar.upload(file, { contentType: "image/png" });

if (await avatar.exists()) {
  const meta = await avatar.head();
  const url = await avatar.url({ expiresIn: 300 });
}

await avatar.delete();

File handles are a thin layer over the same adapter methods, so adapters do not need to implement anything extra.

What you get

• One API across providers — upload, download, head, exists, delete, copy, move, list/listAll, url, signedUploadUrl, plus file(key) for a key-scoped handle. The shape is the same on S3, GCS, Azure, Vercel Blob, the local filesystem, and consumer providers like Dropbox. exists returns false only when the provider reports NotFound; auth, permission, and transport failures still throw.
• Web-standard I/O — bodies are Blob, File, ReadableStream, Uint8Array, ArrayBuffer, or string. No provider-specific types leak into your code.
• Escape hatch — every adapter exposes its native client at files.raw, so provider-specific features are one property access away.
• Tree-shakeable — each adapter is a separate entry point. You only bundle what you import.

Adapters

A growing catalog covering S3 and S3-compatible stores, the major cloud blob platforms, edge/serverless blob services, the local filesystem, and consumer file providers. See files-sdk.dev for the current list and per-adapter setup.

AI tools

A growing set of subpaths wrap a configured Files instance as ready-made tools for popular AI SDKs — currently the Vercel AI SDK (files-sdk/ai-sdk), OpenAI's Responses API and Agents SDK (files-sdk/openai), and Anthropic's Claude Agent SDK (files-sdk/claude). All share the same file operations and approval-gating defaults, so models can browse, read, and (optionally) mutate your bucket through the same unified surface as your application code. See files-sdk.dev for the current list and per-SDK setup.

Live tests

Most tests mock the provider. A few *.live.test.ts suites exercise a real backend instead. They are skipped by default and only run with LIVE_TESTS=1; suites that need credentials also skip when those env vars are absent, so the default bun test stays fast, offline, and credential-free.

# fs needs no credentials — runs against a real temp dir.
LIVE_TESTS=1 bun test fs.live

# s3 needs a bucket + region + credentials.
LIVE_TESTS=1 S3_LIVE_BUCKET=my-bucket AWS_REGION=us-east-1 \
  AWS_ACCESS_KEY_ID=... AWS_SECRET_ACCESS_KEY=... bun test s3.live

Live tests never run on pull_request from forks. In CI they run only when a maintainer triggers the Live tests workflow manually (workflow_dispatch) — typically against main after a PR has merged — with credentials from repo secrets.

License

MIT