Category · Everyday APIs
File storage and sharing APIs for AI agents
Object storage and file services an agent can put files in and share them from: S3-compatible buckets, and drives with folders, permissions and share links. Compared on price per gigabyte, egress fees, access controls and S3 compatibility.
Capability keys storage.object · storage.s3 · storage.share · storage.drive · storage.presigned · All tools
letme.dev/storage.object picks the top-graded tool in this list and says how to call it direct; calling through letme comes later.
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9 | Amazon S3Amazon Web Services · HTTP API | Storage | A | 79.3 | 3.4 (8) | n/a | n/a | $0.005 / 1k req | API key | Hosted | ||
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AWS object storage for files, backups and application data, accessed through an API. Top strength STS session credentials with session policies, so an agent can hold one prefix for an hour Top weakness Egress to the internet is billed per GB after 100 GB a month |
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| 12 | Google Drive API + MCPGoogle · HTTP API | Storage | A | 78.6 | 3.4 (8) | n/a | n/a | Free | OAuth | Hosted | ||
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REST API for a user's or a Workspace organisation's Drive, files, folders, permissions and share links, with resumable uploads and change feeds. Top strength No charge for API calls within quota, counted in quota units per minute per project and per user Top weakness OAuth consent, scope verification and a Cloud project before an agent can list a folder |
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| 14 | Cloudflare R2Cloudflare · HTTP API | Storage | A | 78.4 | 3.5 (8) | n/a | n/a | $0.0045 / 1k req | API key | Hosted | ||
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S3-compatible object storage with no egress fees. Top strength Free egress and a free tier of 10 GB-month plus 1 million writes a month Top weakness No versioning, tagging, ACLs or bucket policies on the S3 API; retention comes as bucket lock rules |
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| 30 | Supabase API + MCPSupabase · HTTP API | Databases | BB | 75.8 | 3.3 (8) | n/a | n/a | $25 / mo | OAuth or key | Hosted + local | ||
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Hosted Postgres with an auto-generated REST API (PostgREST), GraphQL, auth, storage, realtime and Edge Functions, plus a Management API and an official MCP server. Top strength OAuth 2.1 with dynamic client registration, plus personal access tokens scoped to chosen projects and permissions Top weakness Several multi-hour platform incidents between 27 August and 30 September |
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| 35 | Backblaze B2Backblaze · HTTP API | Storage | BB | 75.4 | 3.8 (8) | n/a | n/a | $0.01 / GB | API key | Hosted + local | ||
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Object storage at $6.95 a TB-month with the first 10 GB free, egress free up to three times what you store and $0.01 a GB after, and no charge for most API calls. Top strength $6.95 a TB-month, first 10 GB free, Class A, B and C API calls free, and no card at signup Top weakness No rate limits published with numbers; the docs say only that B2 may throttle per account |
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| 109 | Box API + MCPBox · HTTP API | Storage | B | 69.6 | 2.5 (2) | n/a | n/a | Your plan | OAuth | Hosted | ||
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Enterprise content platform with a REST API for files, folders, shared links, collaborations, metadata and Box AI, published as OpenAPI with year-based API versions. Top strength Public OpenAPI 3.0 spec with 297 operations, year-based API versions and an llms.txt of Markdown pages Top weakness 20 status-feed entries between 7 July and 1 October 2026, two of them over two hours on uploads or multiple services |
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| 129 | Dropbox API + MCPDropbox · HTTP API | Storage | B | 68.2 | 3.0 (2) | n/a | n/a | Your plan | OAuth | Hosted | ||
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HTTP API v2 for a user's or team's Dropbox, files, folders, upload sessions to about 2 TiB, shared links with passwords and expiry, file requests and change cursors. Top strength Typed Stone spec of 281 routes with per-route OAuth scopes and error unions, updated 1 October 2026 Top weakness MCP server is beta, extracts at most 5 MB per file and can be blocked by team admins |
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| 277 | Bunny Storagebunny.net · HTTP API | Storage | C | 58.7 | 3.0 (2) | n/a | n/a | $0.01 / GB | API key | Hosted | ||
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Object storage replicated to up to 15 regions, fronted by Bunny CDN. Top strength $0.01 a GB-month for Standard storage, no request fees, free traffic to the CDN Top weakness Zone passwords are the only storage credential, read-write or read-only, with no expiry, prefix scope or usage log |
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| 404 | TigrisTigris Data · HTTP API | Storage | E | 44.6 | 3.0 (2) | n/a | n/a | $0.005 / 1k req | OAuth or key | Hosted + local | ||
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S3-compatible object storage that replicates objects towards where they're read, with no egress fees and one global endpoint (t3.storage.dev). Top strength No egress fees, and one endpoint (t3.storage.dev) with region auto for every location Top weakness 16 status incidents between 4 July and 2 October 2026, including outages in US regions on 31 July and 2 August |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
Indexed, not reviewed (4)
Listings sorted into this category from public catalogues (the official MCP registry, APIs.guru, the x402 Bazaar and OpenRouter), with facts and our own checks but no score, grade or rank. How the index works.
| Listing | Kind | What it does | Why it's here |
|---|---|---|---|
| DBConvert Streams (Federated SQL) dbconvert.com | MCP server | Read-only SQL across your PostgreSQL, MySQL, S3 buckets and local data files, in one query. | vendor's own |
| gk-cli gitkraken.com | MCP server | The GitKraken MCP Server for managing repos, PRs, issues across GitHub, GitLab, Bitbucket and more. | vendor's own, widely used |
| mcp-upload objekt.sh | MCP server | Public file storage for AI agents. Upload files and get a permalink back. | vendor's own |
| obsideo.io MCP server obsideo.io | MCP server | Encrypted S3-compatible storage with possession proofs you can verify yourself. 12 GB free. | vendor's own |
How we test this category
An agent uploads a large file, lists a folder, shares a link that expires and deletes the file. We check the upload path, access controls, link expiry, and the storage and egress costs. This test hasn't run yet, so Task success is pending and the grades here come from the categories assessed from public evidence.
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
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