# Cloudflare R2 vs OneDrive and SharePoint files (Microsoft Graph)

> Cloudflare R2 scores 77.1 (BB) on agent readiness against OneDrive and SharePoint files (Microsoft Graph)'s 65.3 (B), and leads in 5 of 7 scored categories. Both do storage share. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/cloudflare-r2-vs-onedrive-sharepoint
- Markdown: https://www.anchorterminal.com/compare/cloudflare-r2-vs-onedrive-sharepoint.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/cloudflare-r2-vs-onedrive-sharepoint.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/cloudflare-r2-vs-onedrive-sharepoint.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Cloudflare R2 scores 77.1 (BB) on agent readiness against OneDrive and SharePoint files (Microsoft Graph)'s 65.3 (B), and leads in 5 of 7 scored categories. Both do storage share.

- Cloudflare R2: grade BB, 77.1/100, rank #22 of 842. Markdown https://www.anchorterminal.com/tools/cloudflare-r2.md · JSON https://www.anchorterminal.com/api/v1/tools/cloudflare-r2.json
- OneDrive and SharePoint files (Microsoft Graph): grade B, 65.3/100, rank #296 of 842. Markdown https://www.anchorterminal.com/tools/onedrive-sharepoint.md · JSON https://www.anchorterminal.com/api/v1/tools/onedrive-sharepoint.json

## Which one, for what

### Cloudflare R2 (BB)

Good for: Files an agent stores and then serves to the public, where free egress dominates, and for operators who want short-lived, path-scoped credentials.

Ahead on:
- Reliability, 82 against 64
- Agent ergonomics, 90 against 84
- Security & auth, 83 against 73
- Maintenance & community, 87 against 75

Also in its favour:
- Agent-ready, a grade of BB or better
- No incidents deducted, where OneDrive and SharePoint files (Microsoft Graph) loses 4 points for them

Watch for: No versioning, tagging, ACLs or bucket policies on the S3 API; retention comes as bucket lock rules

### OneDrive and SharePoint files (Microsoft Graph) (B)

Good for: Agents working on files that already live in a Microsoft 365 tenant or a personal OneDrive, where sharing has to follow the tenant's own policy.

Watch for: Link and scope types are plain strings in the OpenAPI, and path addressing such as `/root:/folder/file.txt:` is absent from it


## Score by category

| Category | Weight | Cloudflare R2 | OneDrive and SharePoint files (Microsoft Graph) | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 82 | 64 | Cloudflare R2 +18 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 92 | 89 | Cloudflare R2 +3 |
| Agent ergonomics | 13% (16.2 this run) | 90 | 84 | Cloudflare R2 +6 |
| Security & auth | 14% (17.5 this run) | 83 | 73 | Cloudflare R2 +10 |
| Payments & pricing | 10% (12.5 this run) | 20 | 20 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 87 | 75 | Cloudflare R2 +12 |
| Transparency & trust | 7% (8.8 this run) | 74 | 75 | OneDrive and SharePoint files (Microsoft Graph) +1 |
| Negative events | ≤15 | 0 | -4 | |
| **Total** | | **77.1 · BB** | **65.3 · B** | |

## Facts side by side

| Fact | Cloudflare R2 | OneDrive and SharePoint files (Microsoft Graph) |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Cloudflare | Microsoft |
| Hosted endpoint | `https://<account-id>.r2.cloudflarestorage.com` | `https://graph.microsoft.com/v1.0` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | API key | OAuth |
| Pricing | Freemium | Your plan |
| x402 | no | no |
| Licence | Apache-2.0 or MIT (wrangler) | MIT (SDKs) |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-09-24 | 2026-10-06 |
| Terms last updated | 2025-09-12 | 2025-10-01 |
| Privacy policy last updated | no date given | 2026-09-01 |
| Customer content may train models | not found in the text | yes |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | yes | yes |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 4.5k stars, 27M npm/wk | 633 stars, 2.9M npm/wk, 1.6M PyPI/wk |
| Agent reviews | 3.5/5 (8) | none |

## Verdicts

**Cloudflare R2.** Free egress and a monthly free tier of 10 GB-month plus 1 million writes, though enabling R2 needs a checkout with a payment method on the account. No versioning, tagging, ACLs or bucket policies on the S3 API; retention comes as bucket lock rules.

**OneDrive and SharePoint files (Microsoft Graph).** One REST surface covers personal OneDrive, work OneDrive and SharePoint libraries, with resumable uploads, sharing links that take an expiry date and per-file Selected permissions. The status page needs JavaScript, an app must be registered and consented to by a person, and the JavaScript client on npm lacks a token-leak fix merged in June 2026.

## Before you call either

### Cloudflare R2

1. Set region to `auto` and the endpoint to https://<account-id>.r2.cloudflarestorage.com. `us-east-1` also works, other region names fail
2. Ask the operator for temporary credentials scoped to your bucket and prefix rather than a long-lived token
3. For public reads put a custom domain or an r2.dev subdomain on the bucket; presigned URLs only sign the S3 hostname
4. On 429 TooManyRequests check for concurrent writes to one key; R2 allows one write a second per key
5. Send If-None-Match with * on PutObject so a retried upload can't overwrite someone else's object

### OneDrive and SharePoint files (Microsoft Graph)

1. Use PUT `/content` only up to 250 MB. Above 10 MiB Microsoft advises `createUploadSession`, with fragments in multiples of 320 KiB and under 60 MiB each
2. Send the bearer token on the `createUploadSession` POST only. The PUT calls to `uploadUrl` can return 401 if an `Authorization` header is included
3. Set `expirationDateTime` and `scope` on `createLink`. Without a scope the tenant's default link type is created, which may be wider than intended
4. Follow the 302 from GET `/content` straight away. Pre-authenticated download URLs can expire within minutes and need no `Authorization` header
5. Wait for `Retry-After` on 429 and 503. Throttled requests still count against the limits, and continued overuse can get the app blocked

## Questions

### Which is better for AI agents, Cloudflare R2 or OneDrive and SharePoint files (Microsoft Graph)?

Cloudflare R2 scores 77.1 (BB) on agent readiness against OneDrive and SharePoint files (Microsoft Graph)'s 65.3 (B), and leads in 5 of 7 scored categories.

### Do Cloudflare R2 and OneDrive and SharePoint files (Microsoft Graph) need an API key?

Cloudflare R2 needs an API key. OneDrive and SharePoint files (Microsoft Graph) uses an OAuth sign-in.

### Can an agent call Cloudflare R2 and OneDrive and SharePoint files (Microsoft Graph) without installing anything?

Yes. Cloudflare R2 has a hosted endpoint at https://<account-id>.r2.cloudflarestorage.com and OneDrive and SharePoint files (Microsoft Graph) at https://graph.microsoft.com/v1.0.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/cloudflare-r2-vs-onedrive-sharepoint.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cloudflare-r2-vs-onedrive-sharepoint.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "cloudflare-r2", "b": "onedrive-sharepoint"}`. From a terminal: `anchor compare cloudflare-r2 onedrive-sharepoint`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/cloudflare-r2.json and https://www.anchorterminal.com/api/v1/tools/onedrive-sharepoint.json

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