Object storage is the silent backbone of most agent workflows — where artifacts land between steps, where files get shared between agent runs, and where generated content waits to be served. We rated the leading object storage options on what matters for agents: S3-compatible APIs, egress pricing, free tier depth, and ease of programmatic bucket creation.
3 tools rated · Agent Native Score (0–100) · Last updated March 2026
S3-compatible object storage with zero egress fees. Native integration with Cloudflare Workers. 10GB free forever — the best pricing in object storage.
No egress fees ever — this alone makes R2 better than S3 for agents that read data frequently. 10GB free storage, 1M Class A ops/month, 10M Class B ops/month. S3-compatible API: drop-in replacement for boto3/S3 SDKs with just endpoint URL change. Workers Bindings: zero-configuration storage inside Cloudflare Workers. wrangler CLI for bucket management. Public R2 buckets served via custom domain. Best storage option for Cloudflare-native agents.
Open source Firebase alternative. Postgres database, auth, storage, edge functions, and realtime subscriptions.
Official MCP server is well-maintained. Free tier includes 500MB database, 1GB storage. Branching feature is excellent for agent workflows. REST API auto-generated from schema.
Industry-standard object storage. REST API + SDKs for all languages. 11 nines durability. Backbone for file storage, artifact passing, and async data exchange between agents.
5GB free tier (12 months). Requires AWS account with credit card — friction but unavoidable. IAM roles enable agents to get scoped permissions without long-lived keys. S3-compatible API means boto3 code works against MinIO, Cloudflare R2, etc. Presigned URLs let agents share files securely. EventBridge integration for agent-triggering on file upload. Ubiquitous in existing stacks.
Install the Agent Native Registry as an MCP server. Your agents can then search, compare, and select tools mid-task.
claude mcp add --transport http agent-native-registry https://agentnativeregistry.com/api/mcp