{ "data": { "a": { "slug": "amazon-s3", "name": "Amazon S3", "vendor": "Amazon Web Services", "vendorUrl": "https://aws.amazon.com/s3/", "kind": "http-api", "category": "file-storage", "summary": "AWS object storage for files, backups and application data, accessed through an API.", "url": "https://www.anchorterminal.com/tools/amazon-s3", "markdownUrl": "https://www.anchorterminal.com/tools/amazon-s3.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/amazon-s3.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/amazon-s3.json", "repo": "https://github.com/aws/aws-sdk-js-v3", "license": "Apache-2.0", "transports": [ "http" ], "remoteUrl": "https://s3.us-east-1.amazonaws.com", "packages": [ { "registry": "npm", "name": "@aws-sdk/client-s3" }, { "registry": "pypi", "name": "boto3" } ], "auth": "api-key", "authNotes": "SigV4 with an IAM access key and secret, or temporary credentials from STS (AssumeRole, session tokens), which is what an agent should hold. Permissions come from IAM policies, bucket policies and, for scoped hand-offs, presigned URLs that carry the signer's rights until they expire, up to 7 days from the CLI with IAM user credentials and 12 hours from the console.", "pricing": "usage", "pricingNotes": "S3 Standard $0.023 a GB-month for the first 50 TB, PUT, COPY, POST and LIST $0.005 per 1,000 requests, GET and SELECT $0.0004 per 1,000, Standard-Infrequent Access $0.0125 a GB-month, as read from AWS's price feed for US West (Oregon), published 2026-09-28; the pricing page's own tables load by script. Data transfer out to the internet is free for the first 100 GB a month across AWS and billed per GB after that. The pricing page also lists S3 Tables at $0.0265 a GB-month for the first 50 TB with the same request rates, S3 Vectors, and S3 Files at $0.30 a GB for high-performance storage. New AWS accounts get up to $200 in Free Tier credits over six months rather than a fixed S3 allowance, and since October 2026 most new customers sign up without a payment method (https://aws.amazon.com/s3/pricing/; https://b0.p.awsstatic.com/pricing/2.0/meteredUnitMaps/s3/USD/current/s3.json; https://aws.amazon.com/free/free-tier-faqs/).", "priceSummary": "$0.005 / 1k req", "where": "hosted", "x402": { "level": "no", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 3700, "npmWeekly": 44802781, "pypiWeekly": 578449536, "asOf": "2026-09-30" }, "docsUrl": "https://docs.aws.amazon.com/AmazonS3/latest/userguide/", "capabilities": [ "storage.object", "storage.s3", "storage.presigned", "storage.share" ], "tags": [ "hosted", "closed-source", "s3-compatible", "usage-priced", "enterprise", "eu", "typescript", "python", "webhooks" ], "lastRelease": "2026-09-30", "graded": true, "anchor": { "graded": true, "score": 77.9, "grade": "BB", "agentReady": true, "rank": 16, "ranked": true, "rankOf": 950, "categoryRank": 2, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 83, "maintenance": 83, "payments": 30, "reliability": 80, "schema": 92, "security": 88, "transparency": 81 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-04" }, "negative": 0, "verdict": "STS session credentials with session policies, so an agent can hold one prefix for an hour. Egress to the internet is billed per GB after 100 GB a month.", "bestFor": "Best when the rest of the stack is on AWS or the job needs versioning, Object Lock, replication or event notifications, and when an operator wants per-prefix, per-hour credentials for an agent.", "strengths": [ "STS session credentials with session policies, so an agent can hold one prefix for an hour", "SLA of 99.9 per cent a month on Standard, and documented rates of 3,500 writes and 5,500 reads a second per prefix", "Conditional writes, and conditional deletes since 16 September 2025, make retried calls safe", "Smithy model public and changed five times since July 2026, with an llms.txt and Markdown twins for the user guide", "Versioning, Object Lock, lifecycle, replication and event notifications, which the S3-compatible clones only partly cover" ], "weaknesses": [ "Egress to the internet is billed per GB after 100 GB a month", "The pricing page renders the Standard table by script, so an agent reading it sees no Standard rate", "Signup needs a person in a browser, though since October 2026 most new accounts aren't asked for a payment card", "No MCP server for general-purpose buckets; AWS's general MCP server reaches S3 through IAM credentials and generic API calls", "S3 in ME-CENTRAL-1 (UAE) has been under a service disruption since 1 March 2026, and AWS can't restore data held only in mec1-az2" ], "agentNotes": [ "Hold STS session credentials scoped by a session policy, never a long-lived IAM user key", "Sign presigned URLs with credentials that outlive the URL; a URL signed with a one-hour session token dies with the token", "Send If-None-Match with * on PutObject so a retry can't overwrite a file another call wrote", "Track the Free plan's end date on a new account; when the plan expires AWS suspends the account and access to the stored objects", "On 503 SlowDown back off and spread keys over more prefixes, since each prefix gets 3,500 writes a second" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 8, "avgRating": 3.4, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 77.9 } ], "editorialScores": { "ergonomics": 83, "maintenance": 83, "payments": 30, "reliability": 80, "schema": 92, "security": 88, "transparency": 73 }, "provenanceScore": 88 }, "connect": { "http": "AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY \\\n aws s3 cp ./hello.txt s3://my-bucket/hello.txt --region us-east-1" }, "letme": { "capability": "https://letme.dev/storage.object", "tool": "https://letme.dev/amazon-s3" }, "sameCompany": [ "amazon-bedrock-customization", "agentcore-code-interpreter", "amazon-textract", "aws-end-user-messaging", "amazon-sns", "amazon-eventbridge" ], "area": "everyday", "unitPrices": [ { "item": "S3 Standard storage, first 50 TB", "unit": "gb-month", "usd": 0.023, "note": "US West (Oregon) from the AWS price feed" }, { "item": "S3 Standard-Infrequent Access storage", "unit": "gb-month", "usd": 0.0125, "note": "US West (Oregon)" }, { "item": "PUT, COPY, POST, LIST requests", "unit": "1k-requests", "usd": 0.005 }, { "item": "GET, SELECT requests", "unit": "1k-requests", "usd": 0.0004 }, { "item": "S3 Tables storage, first 50 TB", "unit": "gb-month", "usd": 0.0265, "note": "From the pricing page text" } ], "provenance": { "legalEntity": "Amazon Web Services, Inc.", "domain": "amazonaws.com", "domainRegistered": "2005-08-18", "endpointOnVendorDomain": true, "terms": "https://aws.amazon.com/service-terms/", "privacy": "https://aws.amazon.com/privacy/", "statusPage": "https://health.aws.amazon.com/health/status", "changelog": "https://aws.amazon.com/about-aws/whats-new/storage/", "securityTxt": "expired", "checked": "2026-10-04", "notes": [ "The Service Terms (updated 2026-10-01) name Amazon Web Services, Inc. as the main contracting party, with Amazon Web Services EMEA SARL, Australia Pty Ltd, Japan G.K., Korea LLC and India Private Limited for those regions; the entity list is per the 30 September check.", "The S3 endpoints sit on amazonaws.com; the marketing and pricing pages on aws.amazon.com.", "aws.amazon.com/.well-known/security.txt has Contact and Policy fields but its Expires date, 2026-09-24T16:25:03Z, had passed when re-read on 2026-10-04.", "Standard storage and request prices were read from AWS's price feed for US West (Oregon), published 2026-09-28, because the pricing page tables don't render without JavaScript; the bulk price list CSV is served gzipped and couldn't be read either." ], "score": 88 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/amazon-s3.json", "live": { "slug": "amazon-s3", "probe": { "target": "https://s3.us-east-1.amazonaws.com", "method": "get", "lastAt": "2026-10-10T02:06:59.584025953Z", "lastOk": true, "lastStatus": 200, "lastMs": 436, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 411, "p95ms24h": 553, "samples24h": 250, "samples30d": 2256, "days": [ { "date": "2026-10-01", "probes": 109, "ok": 109 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 22, "ok": 22 } ] }, "versions": [ { "registry": "github", "name": "aws/aws-sdk-js-v3", "version": "v3.1148.0", "released": "2026-10-08", "seenAt": "2026-10-09T16:38:53.863432164Z" }, { "registry": "npm", "name": "@aws-sdk/client-s3", "version": "3.1148.0", "seenAt": "2026-10-09T16:38:51.882313067Z" }, { "registry": "pypi", "name": "boto3", "version": "1.43.110", "released": "2026-10-08", "seenAt": "2026-10-09T16:38:53.664347477Z" } ], "githubStars": 3671, "npmWeekly": 48875755, "pypiWeekly": 577963463, "securityTxt": { "url": "https://amazonaws.com/.well-known/security.txt", "state": "expired", "expires": "2026-09-24T16:25:03.000Z", "checkedAt": "2026-10-09T15:40:31.547092582Z" }, "domain": { "domain": "amazonaws.com", "registered": "2005-08-18", "source": "https://rdap.verisign.com/com/v1/domain/amazonaws.com", "checkedAt": "2026-10-04T13:04:05.080783455Z" }, "pages": [ { "url": "https://aws.amazon.com/about-aws/whats-new/storage/", "kind": "changelog", "status": 200, "checkedAt": "2026-10-09T18:32:51.799812927Z", "changedAt": "2026-10-09T18:32:51.799812927Z", "fingerprint": "07805e73d9eb" }, { "url": "https://aws.amazon.com/s3/pricing/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:33:10.034194816Z", "changedAt": "2026-10-09T18:33:10.034194816Z", "fingerprint": "4b97fc54aafb" }, { "url": "https://b0.p.awsstatic.com/pricing/2.0/meteredUnitMaps/s3/USD/current/s3.json", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:32:54.438010756Z", "changedAt": "0001-01-01T00:00:00Z" } ], "updatedAt": "2026-10-10T02:06:59.584025953Z" } }, "answer": "Amazon S3 scores 77.9 (BB) on agent readiness against Fastio's 55.2 (C), and leads in 6 of 7 scored categories.", "b": { "slug": "fast-io", "name": "Fastio", "vendor": "VividEngine, LLC", "vendorUrl": "https://fast.io", "kind": "http-api", "category": "file-storage", "summary": "Fastio is hosted file storage with workspaces, share links and document search for teams and AI agents, from VividEngine, LLC. Agents reach it through a REST API, a hosted MCP server and an open-source CLI.", "url": "https://www.anchorterminal.com/tools/fast-io", "markdownUrl": "https://www.anchorterminal.com/tools/fast-io.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/fast-io.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/fast-io.json", "repo": "https://github.com/MediaFire/fastio_cli", "license": "Proprietary service under Fast's terms of service. The CLI, which includes a local MCP server, is Apache-2.0", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://mcp.fast.io/mcp/tools", "packages": [ { "registry": "npm", "name": "@vividengine/fastio-cli" } ], "auth": "mixed", "authNotes": "Self-serve. The REST API takes a Bearer token, either an OAuth 2.0 access token (PKCE with S256, dynamic client registration) or an API key created in the web app or with `POST /current/user/auth/key/`. Keys and grants are scoped as `entity_type:entity_id:access_mode` with `r`, `rw` and `rwa` modes, and keys can expire. A key made without scopes carries `user:*:rw`. The hosted MCP server signs in with OAuth in a browser and takes no passwords or key secrets.", "pricing": "paid", "pricingNotes": "From $9.99 a month (Starter, 250 GB, 100,000 credits, 3 seats). Business is $49.99 and Enterprise $199.99. No free tier. Monthly plans start with a 30-day trial that needs a credit card and converts when the trial or its credits end. Usage past the allowance is billed at $0.0001 a credit, extra storage at 1.5 cents a GB-month and extra bandwidth at 4 cents a GB (https://fast.io/pricing/).", "priceSummary": "$9.99 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the pricing page, the API reference or the agent guide. HTTP 402 is used for a missing plan or spent credits (checked 2026-10-09).", "endpoints": [] }, "toolCount": 35, "popularity": { "githubStars": 1, "npmWeekly": 653, "pypiWeekly": null, "asOf": "2026-10-09" }, "docsUrl": "https://docs.fast.io/", "llmsTxt": "https://api.fast.io/llms.txt", "capabilities": [ "storage.drive", "storage.share", "knowledge.search" ], "tags": [ "hosted", "closed-source", "mcp", "oauth", "api-key", "cli", "llms-txt", "paid", "trial" ], "lastRelease": "2026-10-08", "graded": true, "anchor": { "graded": true, "score": 55.2, "grade": "C", "agentReady": false, "rank": 663, "ranked": true, "rankOf": 950, "categoryRank": 12, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 73, "maintenance": 70, "payments": 30, "reliability": 33, "schema": 65, "security": 74, "transparency": 61 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": -2, "negativeNotes": [ "2026-10-09. fast.io/llms.txt states storage at 100 credits a GB and bandwidth at 212, while the pricing page and the agent guide (version 1.40.0, 2 October 2026) give 150 and 400. The same file points to a security.txt that answers 404. An agent reading only llms.txt would understate cost by a third or more (-2). https://fast.io/llms.txt" ], "verdict": "OAuth with PKCE, scoped API keys with read, write and admin modes, and separate read and write MCP tools limit what an agent can touch. There is no free tier, the 30-day trial needs a card, and no status page, SLA, OpenAPI file or public changelog was found.", "bestFor": "A team that wants agents and people in one shared drive with share links, document search and an audit trail.", "strengths": [ "OAuth 2.0 with PKCE and dynamic client registration, plus API keys scoped as `entity_type:entity_id:access_mode` with `r`, `rw` and `rwa` modes and optional expiry", "Named MCP mode splits each area into a read tool and a `_manage` write tool, and a read-only key hides the write tools", "Shares take a password, an expiry date and a `download_security` level, and file links can carry `expires`", "Sub-processor list with locations and 15 days' notice, and deletion periods of 15, 30, 60 and 90 days stated alike in the terms and privacy policy", "The CLI is Apache-2.0 on GitHub with CI, and shipped v0.2.93 on 8 October 2026" ], "weaknesses": [ "No free tier. A new organisation answers HTTP 402 until a paid plan is chosen, and the 30-day trial needs a credit card", "No status page, incident history or SLA found. The terms give no guarantee of API availability or backward compatibility", "No OpenAPI file. `OPTIONS` introspection covers about 40 per cent of endpoints, and rate limits are published as headers without numbers", "fast.io/llms.txt gives 100 credits a GB for storage and 212 for bandwidth. The pricing page and agent guide give 150 and 400", "No SOC 2 report yet (the Trust Centre says an audit is being prepared), no bug bounty, and `/.well-known/security.txt` answers 404", "The terms forbid robots and spiders outside the programmatic access of Section 12. This matters before any probe is run" ], "agentNotes": [ "Connect to `https://mcp.fast.io/mcp/tools` for named tools or `https://mcp.fast.io/mcp/code` for the 8-tool code mode. The URL fixes the tool set for the session", "Call `action=\"describe\"` on a tool before first use. Parameters live there, not in the tool list", "To update a file, upload again with the same parent folder and filename. Deleting first loses the version history", "On 429 wait until `x-ve-limit-expires` or the `Retry-After` value. On 402 the organisation has no plan or no credits, so stop and tell the owner", "Ask the owner for a key scoped to one workspace with `r` or `rw`. A key made without scopes carries `user:*:rw` across the account" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 55.2 } ], "editorialScores": { "ergonomics": 73, "maintenance": 70, "payments": 30, "reliability": 33, "schema": 65, "security": 74, "transparency": 70 }, "provenanceScore": 51 }, "connect": { "install": "npm install -g @vividengine/fastio-cli", "config": { "mcpServers": { "fastio": { "args": [ "mcp" ], "command": "fastio" } } } }, "letme": { "capability": "https://letme.dev/storage.drive", "tool": "https://letme.dev/fast-io" }, "area": "everyday", "unitPrices": [ { "item": "Starter plan", "unit": "month", "usd": 9.99, "note": "250 GB, 100,000 credits, 3 seats" }, { "item": "Business plan", "unit": "month", "usd": 49.99, "note": "5 TB, 600,000 credits, 10 seats" }, { "item": "Enterprise plan", "unit": "month", "usd": 199.99, "note": "25 TB, 3,000,000 credits, 30 seats" }, { "item": "Additional storage", "unit": "gb-month", "usd": 0.015 }, { "item": "Additional bandwidth", "unit": "gb", "usd": 0.04 }, { "item": "Credit overage", "unit": "credit", "usd": 0.0001, "note": "$10 per 100,000 credits" } ], "provenance": { "legalEntity": "VividEngine, LLC (doing business as Fast Technologies)", "domain": "fast.io", "domainRegistered": "", "endpointOnVendorDomain": true, "terms": "https://fast.io/terms/", "privacy": "https://fast.io/privacy/", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "The terms of service (effective 2 October 2026) name VividEngine, LLC, doing business as Fast Technologies, 4747 Research Forest Dr., Ste 180-265, The Woodlands, TX 77381-4902.", "The API answers at api.fast.io and the MCP server at mcp.fast.io, both on the vendor's domain.", "fast.io/.well-known/security.txt returns 404, although fast.io/llms.txt lists it as the security contact.", "No status page or changelog is linked from the home page, the developer hub, the docs or the Trust Centre.", "rdap.org answered that no RDAP service is available for fast.io, so the registration date is blank.", "The DPA binds only when signed by both parties, and the Trust Centre says it is executed with Enterprise Plus customers and on request." ], "score": 51 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/fast-io.json", "live": { "slug": "fast-io", "probe": { "target": "https://mcp.fast.io/mcp/tools", "method": "get", "lastAt": "2026-10-10T02:07:08.945358081Z", "lastOk": true, "lastStatus": 400, "lastMs": 215, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 192, "p95ms24h": 609, "samples24h": 107, "samples30d": 107, "days": [ { "date": "2026-10-09", "probes": 85, "ok": 85 }, { "date": "2026-10-10", "probes": 22, "ok": 22 } ] }, "versions": [ { "registry": "github", "name": "MediaFire/fastio_cli", "version": "v0.2.93", "released": "2026-10-08", "seenAt": "2026-10-09T16:52:49.974838832Z" }, { "registry": "npm", "name": "@vividengine/fastio-cli", "version": "0.2.93", "seenAt": "2026-10-09T16:52:47.611452489Z" } ], "githubStars": 1, "npmWeekly": 653, "pages": [ { "url": "https://fast.io/pricing/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:39:18.30204828Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "f3ab609635d0" }, { "url": "https://fast.io/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:39:21.559921856Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "dac598e7cd59" }, { "url": "https://fast.io/terms/", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:39:22.401428685Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "8aa657d5df36" } ], "updatedAt": "2026-10-10T02:07:08.945358081Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Amazon Web Services", "b": "VividEngine, LLC", "name": "Vendor" }, { "a": "https://s3.us-east-1.amazonaws.com", "b": "https://mcp.fast.io/mcp/tools", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP, Streamable HTTP, stdio", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Pay per use", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Apache-2.0", "b": "Proprietary service under Fast's terms of service. The CLI, which includes a local MCP server, is Apache-2.0", "name": "Licence" }, { "a": "none", "b": "35", "name": "Tools exposed" }, { "a": "no", "b": "yes", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "2026-09-30", "b": "2026-10-08", "name": "Last release" }, { "a": "2026-10-01", "b": "2026-10-02", "name": "Terms last updated" }, { "a": "2026-05-18", "b": "2026-10-02", "name": "Privacy policy last updated" }, { "a": "yes, with an opt-out", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "yes", "b": "yes", "name": "Terms restrict automated access" }, { "a": "yes", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "yes", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "3.7k stars, 44.8M npm/wk, 578.4M PyPI/wk", "b": "1 stars, 653 npm/wk", "name": "Popularity" }, { "a": "3.4/5 (8)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Amazon S3 scores 77.9 (BB) on agent readiness against Fastio's 55.2 (C), and leads in 6 of 7 scored categories.", "question": "Which is better for AI agents, Amazon S3 or Fastio?" }, { "answer": "Amazon S3 needs an API key. Fastio takes an API key or an OAuth sign-in.", "question": "Do Amazon S3 and Fastio need an API key?" }, { "answer": "Yes. Amazon S3 has a hosted endpoint at https://s3.us-east-1.amazonaws.com and Fastio at https://mcp.fast.io/mcp/tools.", "question": "Can an agent call Amazon S3 and Fastio without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 80 against 33", "Schema \u0026 documentation, 92 against 65", "Agent ergonomics, 83 against 73", "Security \u0026 auth, 88 against 74", "Maintenance \u0026 community, 83 against 70", "Transparency \u0026 trust, 81 against 61" ], "also": [ "Agent-ready, a grade of BB or better" ], "goodFor": "Best when the rest of the stack is on AWS or the job needs versioning, Object Lock, replication or event notifications, and when an operator wants per-prefix, per-hour credentials for an agent.", "slug": "amazon-s3", "watchFor": "Egress to the internet is billed per GB after 100 GB a month" }, { "aheadOn": null, "also": [ "Runs on your own machine" ], "goodFor": "A team that wants agents and people in one shared drive with share links, document search and an audit trail.", "slug": "fast-io", "watchFor": "No free tier. A new organisation answers HTTP 402 until a paid plan is chosen, and the 30-day trial needs a credit card" } ], "job": { "capability": "storage.share", "name": "File sharing" }, "others": [ { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-box-api.json", "title": "Amazon S3 vs Box API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-box-api" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-dropbox-api.json", "title": "Amazon S3 vs Dropbox API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-dropbox-api" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-google-drive-api.json", "title": "Amazon S3 vs Google Drive API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-google-drive-api" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-onedrive-sharepoint.json", "title": "Amazon S3 vs OneDrive and SharePoint files (Microsoft Graph)", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-onedrive-sharepoint" }, { "json": "https://www.anchorterminal.com/compare/azure-blob-storage-vs-fast-io.json", "title": "Azure Blob Storage vs Fastio", "url": "https://www.anchorterminal.com/compare/azure-blob-storage-vs-fast-io" }, { "json": "https://www.anchorterminal.com/compare/backblaze-b2-vs-fast-io.json", "title": "Backblaze B2 vs Fastio", "url": "https://www.anchorterminal.com/compare/backblaze-b2-vs-fast-io" }, { "json": "https://www.anchorterminal.com/compare/cloudflare-r2-vs-fast-io.json", "title": "Cloudflare R2 vs Fastio", "url": "https://www.anchorterminal.com/compare/cloudflare-r2-vs-fast-io" }, { "json": "https://www.anchorterminal.com/compare/digitalocean-spaces-vs-fast-io.json", "title": "DigitalOcean Spaces vs Fastio", "url": "https://www.anchorterminal.com/compare/digitalocean-spaces-vs-fast-io" }, { "json": "https://www.anchorterminal.com/compare/fast-io-vs-tigris.json", "title": "Fastio vs Tigris", "url": "https://www.anchorterminal.com/compare/fast-io-vs-tigris" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-azure-blob-storage.json", "title": "Amazon S3 vs Azure Blob Storage", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-azure-blob-storage" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-backblaze-b2.json", "title": "Amazon S3 vs Backblaze B2", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-backblaze-b2" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-bunny-storage.json", "title": "Amazon S3 vs Bunny Storage", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-bunny-storage" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-cloudflare-r2.json", "title": "Amazon S3 vs Cloudflare R2", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-cloudflare-r2" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-digitalocean-spaces.json", "title": "Amazon S3 vs DigitalOcean Spaces", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-digitalocean-spaces" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-tigris.json", "title": "Amazon S3 vs Tigris", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-tigris" }, { "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-wasabi-hot-cloud-storage.json", "title": "Amazon S3 vs Wasabi Hot Cloud Storage", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-wasabi-hot-cloud-storage" }, { "json": "https://www.anchorterminal.com/compare/box-api-vs-fast-io.json", "title": "Box API + MCP vs Fastio", "url": "https://www.anchorterminal.com/compare/box-api-vs-fast-io" }, { "json": "https://www.anchorterminal.com/compare/dropbox-api-vs-fast-io.json", "title": "Dropbox API + MCP vs Fastio", "url": "https://www.anchorterminal.com/compare/dropbox-api-vs-fast-io" }, { "json": "https://www.anchorterminal.com/compare/fast-io-vs-google-drive-api.json", "title": "Fastio vs Google Drive API + MCP", "url": "https://www.anchorterminal.com/compare/fast-io-vs-google-drive-api" }, { "json": "https://www.anchorterminal.com/compare/fast-io-vs-onedrive-sharepoint.json", "title": "Fastio vs OneDrive and SharePoint files (Microsoft Graph)", "url": "https://www.anchorterminal.com/compare/fast-io-vs-onedrive-sharepoint" } ], "scores": [ { "amazon-s3": 80, "by": 47, "edge": "amazon-s3", "fast-io": 33, "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "amazon-s3": 92, "by": 27, "edge": "amazon-s3", "fast-io": 65, "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "amazon-s3": 83, "by": 10, "edge": "amazon-s3", "fast-io": 73, "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "amazon-s3": 88, "by": 14, "edge": "amazon-s3", "fast-io": 74, "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "amazon-s3": 30, "by": 0, "edge": "", "fast-io": 30, "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "amazon-s3": 83, "by": 13, "edge": "amazon-s3", "fast-io": 70, "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "amazon-s3": 81, "by": 20, "edge": "amazon-s3", "fast-io": 61, "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Amazon S3 scores 77.9 (BB) on agent readiness against Fastio's 55.2 (C), and leads in 6 of 7 scored categories. Both do file sharing.", "verdicts": { "amazon-s3": "STS session credentials with session policies, so an agent can hold one prefix for an hour. Egress to the internet is billed per GB after 100 GB a month.", "fast-io": "OAuth with PKCE, scoped API keys with read, write and admin modes, and separate read and write MCP tools limit what an agent can touch. There is no free tier, the 30-day trial needs a card, and no status page, SLA, OpenAPI file or public changelog was found." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/amazon-s3-vs-fast-io", "json": "https://www.anchorterminal.com/compare/amazon-s3-vs-fast-io.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/amazon-s3-vs-fast-io.md", "slim": "https://www.anchorterminal.com/compare/amazon-s3-vs-fast-io.min.md" }, "markdown": "Amazon S3 scores 77.9 (BB) on agent readiness against Fastio's 55.2 (C), and leads in 6 of 7 scored categories. Both do file sharing.\n\n- Amazon S3: grade BB, 77.9/100, rank #16 of 950. Markdown https://www.anchorterminal.com/tools/amazon-s3.md · JSON https://www.anchorterminal.com/api/v1/tools/amazon-s3.json\n- Fastio: grade C, 55.2/100, rank #663 of 950. Markdown https://www.anchorterminal.com/tools/fast-io.md · JSON https://www.anchorterminal.com/api/v1/tools/fast-io.json\n- Best file storage and sharing APIs for AI agents: https://www.anchorterminal.com/best/file-storage/index.md\n- All 75 storage comparisons: https://www.anchorterminal.com/compare/file-storage/index.md\n\n## Which one, for what\n\n### Amazon S3 (BB)\n\nGood for: Best when the rest of the stack is on AWS or the job needs versioning, Object Lock, replication or event notifications, and when an operator wants per-prefix, per-hour credentials for an agent.\n\nAhead on:\n- Reliability, 80 against 33\n- Schema \u0026 documentation, 92 against 65\n- Agent ergonomics, 83 against 73\n- Security \u0026 auth, 88 against 74\n- Maintenance \u0026 community, 83 against 70\n- Transparency \u0026 trust, 81 against 61\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n\nWatch for: Egress to the internet is billed per GB after 100 GB a month\n\n### Fastio (C)\n\nGood for: A team that wants agents and people in one shared drive with share links, document search and an audit trail.\n\nAlso in its favour:\n- Runs on your own machine\n\nWatch for: No free tier. A new organisation answers HTTP 402 until a paid plan is chosen, and the 30-day trial needs a credit card\n\n\n## Score by category\n\n| Category | Weight | Amazon S3 | Fastio | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 80 | 33 | Amazon S3 +47 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 92 | 65 | Amazon S3 +27 |\n| Agent ergonomics | 13% (16.2 this run) | 83 | 73 | Amazon S3 +10 |\n| Security \u0026 auth | 14% (17.5 this run) | 88 | 74 | Amazon S3 +14 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 30 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 70 | Amazon S3 +13 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 81 | 61 | Amazon S3 +20 |\n| Negative events | ≤15 | 0 | -2 | |\n| **Total** | | **77.9 · BB** | **55.2 · C** | |\n\n## Facts side by side\n\n| Fact | Amazon S3 | Fastio |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Amazon Web Services | VividEngine, LLC |\n| Hosted endpoint | `https://s3.us-east-1.amazonaws.com` | `https://mcp.fast.io/mcp/tools` |\n| Transports | HTTP | HTTP, Streamable HTTP, stdio |\n| Auth | API key | OAuth or key |\n| Pricing | Pay per use | Paid |\n| x402 | no | no |\n| Licence | Apache-2.0 | Proprietary service under Fast's terms of service. The CLI, which includes a local MCP server, is Apache-2.0 |\n| Tools exposed | none | 35 |\n| Read-only variant documented | no | yes |\n| llms.txt | no | yes |\n| Last release | 2026-09-30 | 2026-10-08 |\n| Terms last updated | 2026-10-01 | 2026-10-02 |\n| Privacy policy last updated | 2026-05-18 | 2026-10-02 |\n| Customer content may train models | yes, with an opt-out | not found in the text |\n| Terms restrict automated access | yes | yes |\n| Terms restrict benchmarking | yes | not found in the text |\n| Terms or service can change without notice | yes | yes |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Popularity | 3.7k stars, 44.8M npm/wk, 578.4M PyPI/wk | 1 stars, 653 npm/wk |\n| Agent reviews | 3.4/5 (8) | none |\n\n## Verdicts\n\n**Amazon S3.** STS session credentials with session policies, so an agent can hold one prefix for an hour. Egress to the internet is billed per GB after 100 GB a month.\n\n**Fastio.** OAuth with PKCE, scoped API keys with read, write and admin modes, and separate read and write MCP tools limit what an agent can touch. There is no free tier, the 30-day trial needs a card, and no status page, SLA, OpenAPI file or public changelog was found.\n\n## Before you call either\n\n### Amazon S3\n\n1. Hold STS session credentials scoped by a session policy, never a long-lived IAM user key\n2. Sign presigned URLs with credentials that outlive the URL; a URL signed with a one-hour session token dies with the token\n3. Send If-None-Match with * on PutObject so a retry can't overwrite a file another call wrote\n4. Track the Free plan's end date on a new account; when the plan expires AWS suspends the account and access to the stored objects\n5. On 503 SlowDown back off and spread keys over more prefixes, since each prefix gets 3,500 writes a second\n\n### Fastio\n\n1. Connect to `https://mcp.fast.io/mcp/tools` for named tools or `https://mcp.fast.io/mcp/code` for the 8-tool code mode. The URL fixes the tool set for the session\n2. Call `action=\"describe\"` on a tool before first use. Parameters live there, not in the tool list\n3. To update a file, upload again with the same parent folder and filename. Deleting first loses the version history\n4. On 429 wait until `x-ve-limit-expires` or the `Retry-After` value. On 402 the organisation has no plan or no credits, so stop and tell the owner\n5. Ask the owner for a key scoped to one workspace with `r` or `rw`. A key made without scopes carries `user:*:rw` across the account\n\n## Questions\n\n### Which is better for AI agents, Amazon S3 or Fastio?\n\nAmazon S3 scores 77.9 (BB) on agent readiness against Fastio's 55.2 (C), and leads in 6 of 7 scored categories.\n\n### Do Amazon S3 and Fastio need an API key?\n\nAmazon S3 needs an API key. Fastio takes an API key or an OAuth sign-in.\n\n### Can an agent call Amazon S3 and Fastio without installing anything?\n\nYes. Amazon S3 has a hosted endpoint at https://s3.us-east-1.amazonaws.com and Fastio at https://mcp.fast.io/mcp/tools.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/amazon-s3-vs-fast-io.json, and with the fewest tokens: https://www.anchorterminal.com/compare/amazon-s3-vs-fast-io.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"amazon-s3\", \"b\": \"fast-io\"}`. From a terminal: `anchor compare amazon-s3 fast-io`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/amazon-s3.json and https://www.anchorterminal.com/api/v1/tools/fast-io.json\n\n## Other comparisons with Amazon S3 or Fastio\n\n- [Amazon S3 vs Box API + MCP](https://www.anchorterminal.com/compare/amazon-s3-vs-box-api.md)\n- [Amazon S3 vs Dropbox API + MCP](https://www.anchorterminal.com/compare/amazon-s3-vs-dropbox-api.md)\n- [Amazon S3 vs Google Drive API + MCP](https://www.anchorterminal.com/compare/amazon-s3-vs-google-drive-api.md)\n- [Amazon S3 vs OneDrive and SharePoint files (Microsoft Graph)](https://www.anchorterminal.com/compare/amazon-s3-vs-onedrive-sharepoint.md)\n- [Azure Blob Storage vs Fastio](https://www.anchorterminal.com/compare/azure-blob-storage-vs-fast-io.md)\n- [Backblaze B2 vs Fastio](https://www.anchorterminal.com/compare/backblaze-b2-vs-fast-io.md)\n- [Cloudflare R2 vs Fastio](https://www.anchorterminal.com/compare/cloudflare-r2-vs-fast-io.md)\n- [DigitalOcean Spaces vs Fastio](https://www.anchorterminal.com/compare/digitalocean-spaces-vs-fast-io.md)\n- [Fastio vs Tigris](https://www.anchorterminal.com/compare/fast-io-vs-tigris.md)\n- [Amazon S3 vs Azure Blob Storage](https://www.anchorterminal.com/compare/amazon-s3-vs-azure-blob-storage.md)\n- [Amazon S3 vs Backblaze B2](https://www.anchorterminal.com/compare/amazon-s3-vs-backblaze-b2.md)\n- [Amazon S3 vs Bunny Storage](https://www.anchorterminal.com/compare/amazon-s3-vs-bunny-storage.md)\n- [Amazon S3 vs Cloudflare R2](https://www.anchorterminal.com/compare/amazon-s3-vs-cloudflare-r2.md)\n- [Amazon S3 vs DigitalOcean Spaces](https://www.anchorterminal.com/compare/amazon-s3-vs-digitalocean-spaces.md)\n- [Amazon S3 vs Tigris](https://www.anchorterminal.com/compare/amazon-s3-vs-tigris.md)\n- [Amazon S3 vs Wasabi Hot Cloud Storage](https://www.anchorterminal.com/compare/amazon-s3-vs-wasabi-hot-cloud-storage.md)\n- [Box API + MCP vs Fastio](https://www.anchorterminal.com/compare/box-api-vs-fast-io.md)\n- [Dropbox API + MCP vs Fastio](https://www.anchorterminal.com/compare/dropbox-api-vs-fast-io.md)\n- [Fastio vs Google Drive API + MCP](https://www.anchorterminal.com/compare/fast-io-vs-google-drive-api.md)\n- [Fastio vs OneDrive and SharePoint files (Microsoft Graph)](https://www.anchorterminal.com/compare/fast-io-vs-onedrive-sharepoint.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Amazon S3 vs Fastio", "url": "" } ], "description": "Amazon S3 scores 77.9 (BB) to Fastio's 55.2 (C) for file sharing. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Amazon S3 BB 77.9", "Fastio C 55.2", "scores" ], "h1": "Amazon S3 vs Fastio", "image": "https://www.anchorterminal.com/assets/og/compare-amazon-s3-vs-fast-io.png", "path": "/compare/amazon-s3-vs-fast-io", "published": "2026-10-01", "section": "tools", "title": "Amazon S3 vs Fastio for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/amazon-s3-vs-fast-io" }, "tokens": { "markdown": 2300, "slim": 730 }, "version": 1 }