{ "data": { "a": { "slug": "cloudviz", "name": "Cloudviz API", "vendor": "Cloudviz", "vendorUrl": "https://cloudviz.io", "kind": "http-api", "category": "diagramming", "summary": "Generates AWS architecture diagrams from a live account.", "url": "https://www.anchorterminal.com/tools/cloudviz", "markdownUrl": "https://www.anchorterminal.com/tools/cloudviz.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cloudviz.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cloudviz.json", "transports": [ "http" ], "remoteUrl": "https://api.cloudviz.io", "packages": [], "auth": "api-key", "authNotes": "API key in the x-api-key header, created in the app under Manage API Keys. Each key is read or read and write, and can be changed at any time. Cloudviz reads your AWS account through a cross-account read-only IAM role.", "pricing": "paid", "pricingNotes": "10-day free trial. Base $9.95 per user a month with 3 AWS accounts and no API. Team $49 a month for 10 users with unlimited AWS accounts, API access, SSO and 20 automated diagrams. Enterprise (self-hosted, unlimited users) by quote. Annual billing is up to 30 per cent off, and AWS Marketplace billing is available (https://cloudviz.io/pricing).", "priceSummary": "$9.95 / seat-mo", "where": "hosted", "x402": { "level": "no", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://cloudviz.io/developers", "openapi": "https://cloudviz.io/assets/developers/openapi.json", "capabilities": [ "diagram.create", "diagram.export", "diagram.architecture" ], "tags": [ "hosted", "closed-source", "openapi", "async-jobs", "enterprise" ], "graded": true, "anchor": { "graded": true, "score": 37.7, "grade": "F", "agentReady": false, "rank": 925, "ranked": true, "rankOf": 950, "categoryRank": 13, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 50, "maintenance": 5, "payments": 20, "reliability": 20, "schema": 58, "security": 53, "transparency": 45 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Diagrams come from the live AWS account through a read-only cross-account role with a per-customer external ID. AWS only, and API access starts at the $49 a month Team plan.", "bestFor": "Documenting what already runs in AWS, for example regenerating a diagram after each deploy and posting it to Confluence or Slack.", "strengths": [ "Diagrams come from the live AWS account through a read-only cross-account role with a per-customer external ID", "One GET returns svg, png, pdf, drawio, jsonDiagram or jsonSnapshot", "Public OpenAPI 3.0.3 file with 7 operations and documented status codes", "API keys can be read-only" ], "weaknesses": [ "AWS only, and API access starts at the $49 a month Team plan", "Throttling on rate, burst and daily count with no published numbers", "No status page, changelog, SLA or security.txt", "No dated product update found since March 2025" ], "agentNotes": [ "Call `GET /aws/accounts/` first to get the Cloudviz account ID, then request `/aws/accounts/{account-id}/{region}/{format}`", "On a 202, wait and repeat the same GET until the diagram is ready", "Ask for `jsonSnapshot` or `jsonDiagram` (there is no plain `json` format) when the agent has to reason over resources", "Use a read-only key unless the agent has to add, change or delete AWS accounts" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "F", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 37.7 } ], "editorialScores": { "ergonomics": 50, "maintenance": 5, "payments": 20, "reliability": 20, "schema": 58, "security": 53, "transparency": 38 }, "provenanceScore": 51 }, "connect": { "http": "curl https://api.cloudviz.io/aws/accounts/ -H \"x-api-key: $CLOUDVIZ_API_KEY\"" }, "letme": { "capability": "https://letme.dev/diagram.create", "tool": "https://letme.dev/cloudviz" }, "area": "design-diagrams", "unitPrices": [ { "item": "Base plan", "unit": "seat-month", "usd": 9.95, "note": "billed monthly, no API access" }, { "item": "Team plan", "unit": "month", "usd": 49, "note": "10 users, first plan with API access, billed monthly" } ], "provenance": { "legalEntity": "SIA Cloudviz Solutions", "domain": "cloudviz.io", "domainRegistered": "", "endpointOnVendorDomain": true, "terms": "https://cloudviz.io/terms", "privacy": "https://cloudviz.io/privacy", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-01", "notes": [ "SIA is a Latvian limited company, registration number 44103120286, legal address Rīgas iela 22A-53, Limbaži, LV-4001 (firmas.lv)", "Terms are governed by Latvian law and were last updated on 26 March 2019", "No RDAP service answers for .io, so the registration date is unknown", "/.well-known/security.txt returns 404. The security page names security@cloudviz.io" ], "score": 51 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/cloudviz.json", "live": { "slug": "cloudviz", "probe": { "target": "https://api.cloudviz.io", "method": "get", "lastAt": "2026-10-10T03:53:23.93206632Z", "lastOk": true, "lastStatus": 403, "lastMs": 58, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 58, "p95ms24h": 100, "samples24h": 249, "samples30d": 2476, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "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": 40, "ok": 40 } ] }, "securityTxt": { "url": "https://cloudviz.io/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-09T15:39:17.762891647Z" }, "domain": { "domain": "cloudviz.io", "checkedAt": "2026-10-04T13:03:55.142223054Z" }, "pages": [ { "url": "https://cloudviz.io/pricing", "kind": "pricing", "status": 304, "checkedAt": "2026-10-09T18:34:00.11883612Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "65ac1cddb5ad" }, { "url": "https://cloudviz.io/privacy", "kind": "privacy", "status": 304, "checkedAt": "2026-10-09T18:34:02.19941143Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "b4c608710d46" }, { "url": "https://cloudviz.io/terms", "kind": "terms", "status": 304, "checkedAt": "2026-10-09T18:34:04.18933796Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "f319fbc0e66d" } ], "updatedAt": "2026-10-10T03:53:23.93206632Z" } }, "answer": "Excalidraw scores 54.5 (C) on agent readiness against Cloudviz API's 37.7 (F), and leads in every scored category.", "b": { "slug": "excalidraw", "name": "Excalidraw", "vendor": "Excalidraw s.r.o.", "vendorUrl": "https://plus.excalidraw.com", "kind": "http-api", "category": "diagramming", "summary": "Excalidraw is a hand-drawn style whiteboard and diagram editor from Excalidraw s.r.o. in Brno. Agents reach it through the Excalidraw+ REST API and MCP server (public beta), a free keyless MCP App, and the open-source editor on npm (MIT).", "url": "https://www.anchorterminal.com/tools/excalidraw", "markdownUrl": "https://www.anchorterminal.com/tools/excalidraw.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/excalidraw.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/excalidraw.json", "repo": "https://github.com/excalidraw/excalidraw", "license": "Excalidraw+ is a proprietary service under Excalidraw's terms of use. The editor and the MCP App on GitHub are MIT", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.excalidraw.com/api/v1/mcp", "packages": [ { "registry": "npm", "name": "@excalidraw/excalidraw" } ], "auth": "api-key", "authNotes": "A person creates an API key in Excalidraw+ workspace settings, and the full key is shown once. Keys are sent as `Authorization: Bearer \u003cAPI_KEY\u003e`, belong to one workspace, take `read` or `full` permission or specific routes, and expire on a set date. Personal keys act as one member and need a workspace admin to enable them. Workspace keys act as the workspace. The free MCP App at https://mcp.excalidraw.com takes no credential.", "pricing": "freemium", "pricingNotes": "API and MCP access is listed under the Plus plan at $6 a user a month, 14 per cent less billed yearly, with a 14-day trial. The page does not say whether the trial takes a card. The Free plan, the free MCP App and the npm editor cost nothing, so an agent can draw without a contract but cannot reach a workspace (checked 2026-10-09).", "priceSummary": "$6 / seat-mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs dump, the pricing page or the MCP App source (checked 2026-10-09).", "endpoints": [] }, "toolCount": 37, "popularity": { "githubStars": 133534, "npmWeekly": 675606, "pypiWeekly": null, "asOf": "2026-10-09" }, "docsUrl": "https://plus.excalidraw.com/docs", "llmsTxt": "https://plus.excalidraw.com/llms.txt", "capabilities": [ "diagram.create", "diagram.edit", "diagram.export", "diagram.as-code" ], "tags": [ "hosted", "mcp", "api-key", "llms-txt", "freemium", "beta", "status-page", "soc2", "open-source", "typescript", "eu" ], "lastRelease": "2026-09-01", "graded": true, "anchor": { "graded": true, "score": 54.5, "grade": "C", "agentReady": false, "rank": 683, "ranked": true, "rankOf": 950, "categoryRank": 9, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 58, "maintenance": 44, "payments": 35, "reliability": 50, "schema": 65, "security": 73, "transparency": 63 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": -2, "negativeNotes": [ "Checked 2026-10-09. GHSA-39h7-pwv7-rc3x (CVE-2025-54881, medium), cross-site scripting in the Mermaid to Excalidraw conversion step, was published on 21 April 2026 and fixed in `@excalidraw/excalidraw` 0.18.1 and `@excalidraw/mermaid-to-excalidraw` 1.1.3. Fixed and published, so 2 points (https://github.com/excalidraw/excalidraw/security/advisories/GHSA-39h7-pwv7-rc3x)." ], "verdict": "Excalidraw+ keys carry read or full permission, route restrictions and an expiry, and the MCP server shows a key only the tools its routes allow. The API and MCP server are in public beta with breaking changes expected, sit behind the $6 Plus plan, and have no published OpenAPI file, SDK or idempotency keys.", "bestFor": "Teams already on Excalidraw+ that want agents to create and edit hand-drawn diagrams, slides and wireframes in a shared workspace, and one-off sketches through the free MCP App.", "strengths": [ "API keys take `read` or `full` permission, route restrictions and an expiry, and can be rotated. The MCP server lists only the tools a key's routes allow", "`create_diagram` lays out nodes, edges and groups into editable shapes with bound arrows, and `take_screenshot` returns a PNG to check the result", "`search_scene_content` returns only matching elements, so an agent need not load a whole scene", "`llms.txt` and a 110 KB `llms-full.txt` carry the API and MCP docs, and `GET /logs` returns the workspace audit log", "A free MCP App at https://mcp.excalidraw.com needs no account or key, and the editor is MIT on npm with 675,606 downloads in the week to 7 October 2026" ], "weaknesses": [ "The API and MCP server are in public beta. The docs say endpoints, tool names and schemas may change and to expect breaking changes", "API and MCP access needs the Plus plan at $6 a user a month. No per-call price, and no SDK for the API", "No OpenAPI file is linked from the docs, although the reference pages are generated from one. No idempotency keys and no SLA found", "The terms of use (in effect 1 June 2022) forbid access through a bot or script and do not mention the API. This matters before any probe is run", "The privacy policy is dated 29 April 2021 and names no AI providers. The sub-processor list sits in a script-drawn trust centre", "In the free MCP App, `create_view` is marked read-only yet stores a checkpoint for 30 days, and its reply names a `read_widget_context` tool the server does not register" ], "agentNotes": [ "Send `Authorization: Bearer \u003cAPI_KEY\u003e` to https://api.excalidraw.com/api/v1. For MCP, use `POST /api/v1/mcp` only. The server is stateless and answers 405 to other methods", "Use a personal key to reach the owner's private collection with the collection ID `private`. A workspace admin must enable personal keys first", "Call `read_diagram_format`, `read_presentation_format` or `read_freeform_format` before the first scene write in a session", "Write with `edit_scene_content` and bind arrows through `startBinding` and `endBinding` with `tempId` references. `PUT /scenes/{sceneId}/content` removes every element left out of the request", "Stay under 600 requests a minute per IP and wait until `X-RateLimit-Reset` after a 429" ], "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": 54.5 } ], "editorialScores": { "ergonomics": 58, "maintenance": 44, "payments": 35, "reliability": 50, "schema": 65, "security": 73, "transparency": 45 }, "provenanceScore": 80 }, "connect": { "install": "npm install react react-dom @excalidraw/excalidraw", "http": "curl https://api.excalidraw.com/api/v1/collections \\\n -H \"Authorization: Bearer \u003cAPI_KEY\u003e\"", "config": { "mcpServers": { "excalidraw": { "headers": { "Authorization": "Bearer \u003cAPI_KEY\u003e" }, "type": "http", "url": "https://api.excalidraw.com/api/v1/mcp" } } } }, "letme": { "capability": "https://letme.dev/diagram.create", "tool": "https://letme.dev/excalidraw" }, "area": "design-diagrams", "unitPrices": [ { "item": "Plus plan", "unit": "seat-month", "usd": 6, "note": "billed monthly, 14 per cent less billed yearly. API and MCP access, 100 AI requests a day" } ], "provenance": { "legalEntity": "Excalidraw s.r.o.", "domain": "excalidraw.com", "domainRegistered": "2020-01-03", "endpointOnVendorDomain": true, "terms": "https://plus.excalidraw.com/terms-of-service", "privacy": "https://plus.excalidraw.com/privacy-policy", "statusPage": "https://status.excalidraw.com", "changelog": "https://plus.excalidraw.com/changelog", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "The terms of use and the privacy policy name Excalidraw s.r.o., Pražákova 1008/69, Brno 639 00, Czech Republic. The terms are governed by Czech law.", "The terms of use (published 30 May 2022) are the only terms found. They cover the Site and the subscription and do not mention the API or MCP server.", "The privacy policy is dated 29 April 2021. A DPA dated 13 January 2026 is at https://plus.excalidraw.com/data-processing-agreement-dpa.", "plus.excalidraw.com/.well-known/security.txt returns 404. excalidraw.com was not asked, because its robots.txt is ambiguous for unnamed agents.", "RDAP for excalidraw.com gives a registration date of 2020-01-03.", "The robots.txt files of api.excalidraw.com and status.excalidraw.com disallow every path." ], "score": 80 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/excalidraw.json", "live": { "slug": "excalidraw", "probe": { "target": "https://api.excalidraw.com/api/v1/mcp", "method": "get", "lastAt": "2026-10-10T03:53:26.942763537Z", "lastOk": true, "lastStatus": 405, "lastMs": 336, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 336, "p95ms24h": 400, "samples24h": 125, "samples30d": 125, "days": [ { "date": "2026-10-09", "probes": 85, "ok": 85 }, { "date": "2026-10-10", "probes": 40, "ok": 40 } ] }, "vendorStatus": { "page": "https://status.excalidraw.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-10T00:50:32.425887728Z" }, "versions": [ { "registry": "github", "name": "excalidraw/excalidraw", "version": "v0.18.1", "released": "2026-04-21", "seenAt": "2026-10-09T16:52:20.443420866Z" }, { "registry": "npm", "name": "@excalidraw/excalidraw", "version": "0.18.1", "seenAt": "2026-10-09T16:52:19.575748854Z" } ], "githubStars": 133551, "npmWeekly": 675606, "pages": [ { "url": "https://plus.excalidraw.com/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-10-09T18:43:35.623690787Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "7a9250424db5" }, { "url": "https://plus.excalidraw.com/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:43:37.662006429Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "8328a24b3944" }, { "url": "https://plus.excalidraw.com/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:43:39.940578591Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "3dc978ec9eff" } ], "updatedAt": "2026-10-10T03:53:26.942763537Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Cloudviz", "b": "Excalidraw s.r.o.", "name": "Vendor" }, { "a": "https://api.cloudviz.io", "b": "https://api.excalidraw.com/api/v1/mcp", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Paid", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "Excalidraw+ is a proprietary service under Excalidraw's terms of use. The editor and the MCP App on GitHub are MIT", "name": "Licence" }, { "a": "none", "b": "37", "name": "Tools exposed" }, { "a": "yes", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "none", "b": "2026-09-01", "name": "Last release" }, { "a": "2019-03-26", "b": "no date given", "name": "Terms last updated" }, { "a": "couldn't be read", "b": "2021-04-29", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "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": "none", "b": "134k stars, 676k npm/wk", "name": "Popularity" }, { "a": "2.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Excalidraw scores 54.5 (C) on agent readiness against Cloudviz API's 37.7 (F), and leads in every scored category.", "question": "Which is better for AI agents, Cloudviz API or Excalidraw?" }, { "answer": "Both need an API key.", "question": "Do Cloudviz API and Excalidraw need an API key?" }, { "answer": "Yes. Cloudviz API has a hosted endpoint at https://api.cloudviz.io and Excalidraw at https://api.excalidraw.com/api/v1/mcp.", "question": "Can an agent call Cloudviz API and Excalidraw without installing anything?" }, { "answer": "No open-source release is listed for Cloudviz API. Excalidraw is open source (Excalidraw+ is a proprietary service under Excalidraw's terms of use. The editor and the MCP App on GitHub are MIT).", "question": "Are Cloudviz API and Excalidraw open source?" } ], "goodFor": [ { "aheadOn": null, "also": null, "goodFor": "Documenting what already runs in AWS, for example regenerating a diagram after each deploy and posting it to Confluence or Slack.", "slug": "cloudviz", "watchFor": "AWS only, and API access starts at the $49 a month Team plan" }, { "aheadOn": [ "Reliability, 50 against 20", "Schema \u0026 documentation, 65 against 58", "Agent ergonomics, 58 against 50", "Security \u0026 auth, 73 against 53", "Payments \u0026 pricing, 35 against 20", "Maintenance \u0026 community, 44 against 5", "Transparency \u0026 trust, 63 against 45" ], "also": [ "Open source" ], "goodFor": "Teams already on Excalidraw+ that want agents to create and edit hand-drawn diagrams, slides and wireframes in a shared workspace, and one-off sketches through the free MCP App.", "slug": "excalidraw", "watchFor": "The API and MCP server are in public beta. The docs say endpoints, tool names and schemas may change and to expect breaking changes" } ], "job": { "capability": "diagram.create", "name": "Diagram creation" }, "others": [ { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-d2.json", "title": "Cloudviz API vs D2", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-d2" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-diagrams-so.json", "title": "Cloudviz API vs Diagrams.so API + MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-diagrams-so" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-drawio.json", "title": "Cloudviz API vs draw.io + MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-drawio" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-eraser.json", "title": "Cloudviz API vs Eraser API + MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-eraser" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-kroki.json", "title": "Cloudviz API vs Kroki", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-kroki" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-lucid.json", "title": "Cloudviz API vs Lucid API + MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-lucid" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-mermaid-chart.json", "title": "Cloudviz API vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-mural-mcp.json", "title": "Cloudviz API vs Mural MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-mural-mcp" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-plantuml.json", "title": "Cloudviz API vs PlantUML", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-structurizr.json", "title": "Cloudviz API vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-tldraw.json", "title": "Cloudviz API vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-whimsical.json", "title": "Cloudviz API vs Whimsical MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-whimsical" }, { "json": "https://www.anchorterminal.com/compare/diagrams-so-vs-excalidraw.json", "title": "Diagrams.so API + MCP vs Excalidraw", "url": "https://www.anchorterminal.com/compare/diagrams-so-vs-excalidraw" }, { "json": "https://www.anchorterminal.com/compare/drawio-vs-excalidraw.json", "title": "draw.io + MCP vs Excalidraw", "url": "https://www.anchorterminal.com/compare/drawio-vs-excalidraw" }, { "json": "https://www.anchorterminal.com/compare/eraser-vs-excalidraw.json", "title": "Eraser API + MCP vs Excalidraw", "url": "https://www.anchorterminal.com/compare/eraser-vs-excalidraw" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-kroki.json", "title": "Excalidraw vs Kroki", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-kroki" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-lucid.json", "title": "Excalidraw vs Lucid API + MCP", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-lucid" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-mermaid-chart.json", "title": "Excalidraw vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-mural-mcp.json", "title": "Excalidraw vs Mural MCP", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-mural-mcp" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-plantuml.json", "title": "Excalidraw vs PlantUML", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-structurizr.json", "title": "Excalidraw vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-tldraw.json", "title": "Excalidraw vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-whimsical.json", "title": "Excalidraw vs Whimsical MCP", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-whimsical" }, { "json": "https://www.anchorterminal.com/compare/d2-vs-excalidraw.json", "title": "D2 vs Excalidraw", "url": "https://www.anchorterminal.com/compare/d2-vs-excalidraw" } ], "scores": [ { "by": 30, "cloudviz": 20, "edge": "excalidraw", "excalidraw": 50, "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 7, "cloudviz": 58, "edge": "excalidraw", "excalidraw": 65, "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "by": 8, "cloudviz": 50, "edge": "excalidraw", "excalidraw": 58, "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "by": 20, "cloudviz": 53, "edge": "excalidraw", "excalidraw": 73, "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "by": 15, "cloudviz": 20, "edge": "excalidraw", "excalidraw": 35, "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 39, "cloudviz": 5, "edge": "excalidraw", "excalidraw": 44, "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "by": 18, "cloudviz": 45, "edge": "excalidraw", "excalidraw": 63, "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Excalidraw scores 54.5 (C) on agent readiness against Cloudviz API's 37.7 (F), and leads in every scored category. Both do diagram creation.", "verdicts": { "cloudviz": "Diagrams come from the live AWS account through a read-only cross-account role with a per-customer external ID. AWS only, and API access starts at the $49 a month Team plan.", "excalidraw": "Excalidraw+ keys carry read or full permission, route restrictions and an expiry, and the MCP server shows a key only the tools its routes allow. The API and MCP server are in public beta with breaking changes expected, sit behind the $6 Plus plan, and have no published OpenAPI file, SDK or idempotency keys." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/cloudviz-vs-excalidraw", "json": "https://www.anchorterminal.com/compare/cloudviz-vs-excalidraw.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/cloudviz-vs-excalidraw.md", "slim": "https://www.anchorterminal.com/compare/cloudviz-vs-excalidraw.min.md" }, "markdown": "Excalidraw scores 54.5 (C) on agent readiness against Cloudviz API's 37.7 (F), and leads in every scored category. Both do diagram creation.\n\n- Cloudviz API: grade F, 37.7/100, rank #925 of 950. Markdown https://www.anchorterminal.com/tools/cloudviz.md · JSON https://www.anchorterminal.com/api/v1/tools/cloudviz.json\n- Excalidraw: grade C, 54.5/100, rank #683 of 950. Markdown https://www.anchorterminal.com/tools/excalidraw.md · JSON https://www.anchorterminal.com/api/v1/tools/excalidraw.json\n- Best diagramming APIs and diagram-as-code for AI agents: https://www.anchorterminal.com/best/diagramming/index.md\n- All 99 diagrams comparisons: https://www.anchorterminal.com/compare/diagramming/index.md\n\n## Which one, for what\n\n### Cloudviz API (F)\n\nGood for: Documenting what already runs in AWS, for example regenerating a diagram after each deploy and posting it to Confluence or Slack.\n\nWatch for: AWS only, and API access starts at the $49 a month Team plan\n\n### Excalidraw (C)\n\nGood for: Teams already on Excalidraw+ that want agents to create and edit hand-drawn diagrams, slides and wireframes in a shared workspace, and one-off sketches through the free MCP App.\n\nAhead on:\n- Reliability, 50 against 20\n- Schema \u0026 documentation, 65 against 58\n- Agent ergonomics, 58 against 50\n- Security \u0026 auth, 73 against 53\n- Payments \u0026 pricing, 35 against 20\n- Maintenance \u0026 community, 44 against 5\n- Transparency \u0026 trust, 63 against 45\n\nAlso in its favour:\n- Open source\n\nWatch for: The API and MCP server are in public beta. The docs say endpoints, tool names and schemas may change and to expect breaking changes\n\n\n## Score by category\n\n| Category | Weight | Cloudviz API | Excalidraw | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 20 | 50 | Excalidraw +30 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 58 | 65 | Excalidraw +7 |\n| Agent ergonomics | 13% (16.2 this run) | 50 | 58 | Excalidraw +8 |\n| Security \u0026 auth | 14% (17.5 this run) | 53 | 73 | Excalidraw +20 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 35 | Excalidraw +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 5 | 44 | Excalidraw +39 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 45 | 63 | Excalidraw +18 |\n| Negative events | ≤15 | 0 | -2 | |\n| **Total** | | **37.7 · F** | **54.5 · C** | |\n\n## Facts side by side\n\n| Fact | Cloudviz API | Excalidraw |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Cloudviz | Excalidraw s.r.o. |\n| Hosted endpoint | `https://api.cloudviz.io` | `https://api.excalidraw.com/api/v1/mcp` |\n| Transports | HTTP | HTTP, Streamable HTTP |\n| Auth | API key | API key |\n| Pricing | Paid | Freemium |\n| x402 | no | no |\n| Licence | none | Excalidraw+ is a proprietary service under Excalidraw's terms of use. The editor and the MCP App on GitHub are MIT |\n| Tools exposed | none | 37 |\n| Read-only variant documented | yes | no |\n| llms.txt | no | yes |\n| Last release | none | 2026-09-01 |\n| Terms last updated | 2019-03-26 | no date given |\n| Privacy policy last updated | couldn't be read | 2021-04-29 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | yes |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Popularity | none | 134k stars, 676k npm/wk |\n| Agent reviews | 2.5/5 (2) | none |\n\n## Verdicts\n\n**Cloudviz API.** Diagrams come from the live AWS account through a read-only cross-account role with a per-customer external ID. AWS only, and API access starts at the $49 a month Team plan.\n\n**Excalidraw.** Excalidraw+ keys carry read or full permission, route restrictions and an expiry, and the MCP server shows a key only the tools its routes allow. The API and MCP server are in public beta with breaking changes expected, sit behind the $6 Plus plan, and have no published OpenAPI file, SDK or idempotency keys.\n\n## Before you call either\n\n### Cloudviz API\n\n1. Call `GET /aws/accounts/` first to get the Cloudviz account ID, then request `/aws/accounts/{account-id}/{region}/{format}`\n2. On a 202, wait and repeat the same GET until the diagram is ready\n3. Ask for `jsonSnapshot` or `jsonDiagram` (there is no plain `json` format) when the agent has to reason over resources\n4. Use a read-only key unless the agent has to add, change or delete AWS accounts\n\n### Excalidraw\n\n1. Send `Authorization: Bearer \u003cAPI_KEY\u003e` to https://api.excalidraw.com/api/v1. For MCP, use `POST /api/v1/mcp` only. The server is stateless and answers 405 to other methods\n2. Use a personal key to reach the owner's private collection with the collection ID `private`. A workspace admin must enable personal keys first\n3. Call `read_diagram_format`, `read_presentation_format` or `read_freeform_format` before the first scene write in a session\n4. Write with `edit_scene_content` and bind arrows through `startBinding` and `endBinding` with `tempId` references. `PUT /scenes/{sceneId}/content` removes every element left out of the request\n5. Stay under 600 requests a minute per IP and wait until `X-RateLimit-Reset` after a 429\n\n## Questions\n\n### Which is better for AI agents, Cloudviz API or Excalidraw?\n\nExcalidraw scores 54.5 (C) on agent readiness against Cloudviz API's 37.7 (F), and leads in every scored category.\n\n### Do Cloudviz API and Excalidraw need an API key?\n\nBoth need an API key.\n\n### Can an agent call Cloudviz API and Excalidraw without installing anything?\n\nYes. Cloudviz API has a hosted endpoint at https://api.cloudviz.io and Excalidraw at https://api.excalidraw.com/api/v1/mcp.\n\n### Are Cloudviz API and Excalidraw open source?\n\nNo open-source release is listed for Cloudviz API. Excalidraw is open source (Excalidraw+ is a proprietary service under Excalidraw's terms of use. The editor and the MCP App on GitHub are MIT).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/cloudviz-vs-excalidraw.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cloudviz-vs-excalidraw.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"cloudviz\", \"b\": \"excalidraw\"}`. From a terminal: `anchor compare cloudviz excalidraw`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/cloudviz.json and https://www.anchorterminal.com/api/v1/tools/excalidraw.json\n\n## Other comparisons with Cloudviz API or Excalidraw\n\n- [Cloudviz API vs D2](https://www.anchorterminal.com/compare/cloudviz-vs-d2.md)\n- [Cloudviz API vs Diagrams.so API + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-diagrams-so.md)\n- [Cloudviz API vs draw.io + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-drawio.md)\n- [Cloudviz API vs Eraser API + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-eraser.md)\n- [Cloudviz API vs Kroki](https://www.anchorterminal.com/compare/cloudviz-vs-kroki.md)\n- [Cloudviz API vs Lucid API + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-lucid.md)\n- [Cloudviz API vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/cloudviz-vs-mermaid-chart.md)\n- [Cloudviz API vs Mural MCP](https://www.anchorterminal.com/compare/cloudviz-vs-mural-mcp.md)\n- [Cloudviz API vs PlantUML](https://www.anchorterminal.com/compare/cloudviz-vs-plantuml.md)\n- [Cloudviz API vs Structurizr + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-structurizr.md)\n- [Cloudviz API vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-tldraw.md)\n- [Cloudviz API vs Whimsical MCP](https://www.anchorterminal.com/compare/cloudviz-vs-whimsical.md)\n- [Diagrams.so API + MCP vs Excalidraw](https://www.anchorterminal.com/compare/diagrams-so-vs-excalidraw.md)\n- [draw.io + MCP vs Excalidraw](https://www.anchorterminal.com/compare/drawio-vs-excalidraw.md)\n- [Eraser API + MCP vs Excalidraw](https://www.anchorterminal.com/compare/eraser-vs-excalidraw.md)\n- [Excalidraw vs Kroki](https://www.anchorterminal.com/compare/excalidraw-vs-kroki.md)\n- [Excalidraw vs Lucid API + MCP](https://www.anchorterminal.com/compare/excalidraw-vs-lucid.md)\n- [Excalidraw vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/excalidraw-vs-mermaid-chart.md)\n- [Excalidraw vs Mural MCP](https://www.anchorterminal.com/compare/excalidraw-vs-mural-mcp.md)\n- [Excalidraw vs PlantUML](https://www.anchorterminal.com/compare/excalidraw-vs-plantuml.md)\n- [Excalidraw vs Structurizr + MCP](https://www.anchorterminal.com/compare/excalidraw-vs-structurizr.md)\n- [Excalidraw vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/excalidraw-vs-tldraw.md)\n- [Excalidraw vs Whimsical MCP](https://www.anchorterminal.com/compare/excalidraw-vs-whimsical.md)\n- [D2 vs Excalidraw](https://www.anchorterminal.com/compare/d2-vs-excalidraw.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": "Cloudviz API vs Excalidraw", "url": "" } ], "description": "Excalidraw scores 54.5 (C) to Cloudviz's 37.7 (F) for diagram creation. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Cloudviz API F 37.7", "Excalidraw C 54.5", "scores" ], "h1": "Cloudviz API vs Excalidraw", "image": "https://www.anchorterminal.com/assets/og/compare-cloudviz-vs-excalidraw.png", "path": "/compare/cloudviz-vs-excalidraw", "published": "2026-10-01", "section": "tools", "title": "Cloudviz vs Excalidraw for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-excalidraw" }, "tokens": { "markdown": 2450, "slim": 680 }, "version": 1 }