{ "data": { "a": { "slug": "plantuml", "name": "PlantUML", "vendor": "PlantUML project (Arnaud Roques)", "vendorUrl": "https://plantuml.com", "kind": "sdk", "category": "diagramming", "summary": "PlantUML is open-source software that turns text descriptions into UML, architecture, Gantt, mind map and other diagrams. Agents run it as a Java command-line tool, a Java library, a local HTTP server or the `@plantuml/mcp-js` MCP server.", "url": "https://www.anchorterminal.com/tools/plantuml", "markdownUrl": "https://www.anchorterminal.com/tools/plantuml.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/plantuml.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/plantuml.json", "repo": "https://github.com/plantuml/plantuml", "license": "GPL-3.0-or-later", "transports": [], "packages": [ { "registry": "maven", "name": "net.sourceforge.plantuml:plantuml" }, { "registry": "npm", "name": "@plantuml/mcp-js" }, { "registry": "oci", "name": "plantuml/plantuml" } ], "auth": "none", "authNotes": "No account, key or login. The jar, the Java library and the MCP server run on the owner's machine with the owner's file and network rights. The built-in `-picoweb` HTTP server has no authentication and listens on all interfaces unless a bind address is given.", "pricing": "free", "pricingNotes": "Free under GPL-3.0-or-later, with the same source also under GPL-2.0, LGPL, Apache-2.0, BSD-3-Clause, EPL and MIT. Nothing to buy. The project takes donations through GitHub Sponsors and Patreon.", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs or the source (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 13356, "npmWeekly": 207, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://plantuml.com/command-line", "capabilities": [ "diagram.as-code", "diagram.create", "diagram.export", "diagram.architecture" ], "tags": [ "open-source", "local", "cli", "java", "mcp", "diagram-as-code", "uml", "no-auth", "free", "docker" ], "lastRelease": "2026-09-05", "graded": true, "anchor": { "graded": true, "score": 66.9, "grade": "B", "agentReady": false, "rank": 251, "ranked": true, "rankOf": 842, "categoryRank": 1, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 78, "maintenance": 73, "payments": 60, "reliability": 83, "schema": 65, "security": 50, "transparency": 73 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": -2, "negativeNotes": [ "27 February 2026. Release 1.2026.2 switched off chronology diagrams, and its change log calls the removal temporary. On 8 October 2026 the factory is still commented out in `PSystemBuilder.java`, while the README lists the chronology diagram as supported and https://plantuml.com/chronology-diagram documents it. Two points, because the removal is in the change log (https://github.com/plantuml/plantuml/blob/master/CHANGES.md)." ], "verdict": "One Java command reads diagram text from stdin and writes PNG, SVG, PDF or ASCII with no account, and CI passed on the last eight pushes. The default security profile lets diagram text read any local file and fetch any URL, and the documentation still lists chronology diagrams that release 1.2026.2 switched off.", "bestFor": "Agents that write sequence, class, state, component, deployment, Gantt or C4 diagrams as text and render them locally or in CI.", "strengths": [ "`java -jar plantuml.jar -pipe` reads a diagram from stdin and writes PNG, SVG, PDF, EPS, LaTeX or ASCII to stdout, with no account or key", "`--check-syntax` and `-stdrpt` report errors as `file:line:error` lines, and exit codes 0, 50, 100 and 200 are documented", "The official `@plantuml/mcp-js` server has four tools, needs only Node.js, and returns the same SVG bytes for the same source on any machine", "Version 1.2026.8 of 5 September 2026 is on GitHub, Maven Central, Homebrew and Docker Hub, and the `ci` workflow passed on the last eight pushes", "The same source is available under GPL-3.0-or-later, GPL-2.0, LGPL, Apache-2.0, BSD-3-Clause, EPL and MIT, and generated images carry no licence obligation" ], "weaknesses": [ "The default security profile is LEGACY, which gives diagram text full access to local files and URLs through `!include`. The docs say it will be removed, with no date", "`-picoweb` listens on all network interfaces by default and has no authentication", "Chronology diagrams were switched off in 1.2026.2 on 27 February 2026 and are still listed in the README and documented on plantuml.com", "The command-line page gives the HTTP server's default port as 4242 in one help listing and 8080 in another. The source uses 8080", "No llms.txt, no security.txt and no published advisories. The security policy is one email address, and 575 issues are open" ], "agentNotes": [ "Set `PLANTUML_SECURITY_PROFILE` to `SANDBOX` or `ALLOWLIST` before rendering text from an untrusted source. The default profile lets `!include` read local files and fetch URLs", "Run `java -jar plantuml.jar --check-syntax` with `-stdrpt` first and read the exit status. Without `--no-error-image` a syntax error still writes an image of the error text", "Pass `-pipe` with `--svg`, `--txt` or `--utxt` to work without files. `--txt` output suits a text-only model", "Start the local server as `-picoweb:8080:127.0.0.1`. Without the bind address it listens on every interface", "Use `npx -y @plantuml/mcp-js` when no Java runtime is present. It renders SVG only, so use the jar for PNG or PDF" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 66.9 } ], "editorialScores": { "ergonomics": 78, "maintenance": 73, "payments": 60, "reliability": 83, "schema": 65, "security": 50, "transparency": 73 }, "provenanceScore": 73 }, "connect": { "install": "brew install plantuml # or download plantuml.jar from https://github.com/plantuml/plantuml/releases, or docker run ghcr.io/plantuml/plantuml", "config": { "mcpServers": { "plantuml-js": { "args": [ "-y", "@plantuml/mcp-js" ], "command": "npx" } } } }, "letme": { "capability": "https://letme.dev/diagram.as-code", "tool": "https://letme.dev/plantuml" }, "area": "design-diagrams", "provenance": { "legalEntity": "No legal entity found. Copyright Arnaud Roques", "domain": "plantuml.com", "domainRegistered": "2010-11-28", "endpointOnVendorDomain": null, "terms": "", "privacy": "", "statusPage": "", "changelog": "https://github.com/plantuml/plantuml/blob/master/CHANGES.md", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "`LICENSES.md` reads Copyright (C) 2009-2026, Arnaud Roques. No company or foundation is named in the repository or on the pages read", "No terms or privacy document governs the software. The GPL-3.0-or-later licence, or one of the six alternatives, stands in", "https://plantuml.com/.well-known/security.txt answered 404 on 8 October 2026. `docs/SECURITY.md` asks for reports by email to a Gmail address", "The lead named PlantUML as vendor. It is a community project led by one author, with no company behind it that we found" ], "score": 73 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/plantuml.json" }, "answer": "PlantUML scores 66.9 (B) on agent readiness against tldraw SDK + MCP's 60.7 (C), and leads in 5 of 7 scored categories. tldraw SDK + MCP leads on schema \u0026 documentation and maintenance \u0026 community.", "b": { "slug": "tldraw", "name": "tldraw SDK + MCP", "vendor": "tldraw", "vendorUrl": "https://tldraw.dev", "kind": "sdk", "category": "diagramming", "summary": "A React infinite-canvas SDK that an agent can drive through the editor API, creating, reading and changing shapes, turning Mermaid into shapes and exporting images.", "url": "https://www.anchorterminal.com/tools/tldraw", "markdownUrl": "https://www.anchorterminal.com/tools/tldraw.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/tldraw.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/tldraw.json", "repo": "https://github.com/tldraw/tldraw", "license": "tldraw licence (source-available, production needs a licence key)", "transports": [ "streamable-http", "sse" ], "remoteUrl": "https://tldraw-mcp-app.tldraw.workers.dev/mcp", "packages": [ { "registry": "npm", "name": "tldraw" } ], "auth": "none", "authNotes": "The SDK runs in your app and needs no API key. It checks a public licence key on the client, offline, and won't run in production without one. The hosted MCP App needs no auth.", "pricing": "paid", "pricingNotes": "Free to use in development. Production needs a licence key. A 100-day trial is free with no card, a hobby licence for non-commercial projects is free at tldraw's discretion and shows a watermark, and commercial licences are annual with value-based pricing agreed with sales. Startup discounts are available. The MCP App is free (https://tldraw.dev/pricing).", "priceSummary": "Paid", "where": "hosted", "x402": { "level": "no", "endpoints": [] }, "toolCount": 6, "popularity": { "githubStars": 50672, "npmWeekly": 490141, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://tldraw.dev/docs/ai", "llmsTxt": "https://tldraw.dev/llms.txt", "registryName": "io.github.tldraw/tldraw", "capabilities": [ "diagram.create", "diagram.as-code", "diagram.edit", "diagram.export" ], "tags": [ "typescript", "hosted", "mcp", "llms-txt", "free-tier" ], "lastRelease": "2026-09-30", "graded": true, "anchor": { "graded": true, "score": 60.7, "grade": "C", "agentReady": false, "rank": 451, "ranked": true, "rankOf": 842, "categoryRank": 4, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 71, "maintenance": 89, "payments": 35, "reliability": 75, "schema": 79, "security": 40, "transparency": 48 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": -2, "negativeNotes": [ "Checked 2026-10-01. The licence page says hobby licences send nothing and trial licences send only a hash of the key, with no user data. The SDK's LicenseManager sends the licence ID, SKU, environment and the full page URL (window.location.href) for trial, hobby-with-watermark and unlicensed production deployments, and the licence key page lists most of this. A full page URL can carry user data in its path or query (https://github.com/tldraw/tldraw/blob/main/packages/editor/src/lib/license/LicenseManager.ts, https://tldraw.dev/community/license)." ], "verdict": "Full editor API to create, read, bind and export shapes from code, with agent, chat and workflow starter kits. Source-available, and commercial prices aren't published.", "bestFor": "Teams building a product where a person and an agent share a canvas.", "strengths": [ "Full editor API to create, read, bind and export shapes from code, with agent, chat and workflow starter kits", "Hosted MCP App with two model-facing tools, all six tools annotated", "At least six releases between 15 July and 30 September 2026, with dated release notes", "Development use and a 100-day production trial need no payment" ], "weaknesses": [ "Source-available, and commercial prices aren't published", "`exec` runs model-written JavaScript on the canvas with no approval step", "Licence pings send the licence ID and full page URL for trial and hobby keys, more than the licence page says", "SECURITY.md lists only 3.x as supported while the current release is 5.5", "No server-side REST API, and the MCP App needs a host that renders MCP Apps" ], "agentNotes": [ "Through the MCP App, call `search` on the Editor API spec first, then `exec` with JavaScript that calls `editor` methods", "Omit `canvasId` to start a blank canvas, and pass the returned `canvasId` to keep editing the same one", "Paste Mermaid into the canvas to get editable shapes instead of placing each shape by hand", "Return `editor.getCurrentPageShapes()` from `exec` to check what was drawn", "Read the release notes before a minor upgrade. Minor versions can break" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 60.7 } ], "editorialScores": { "ergonomics": 71, "maintenance": 89, "payments": 35, "reliability": 75, "schema": 79, "security": 40, "transparency": 45 }, "provenanceScore": 51 }, "connect": { "install": "npm install tldraw", "claudeCode": "claude mcp add --transport http tldraw https://tldraw-mcp-app.tldraw.workers.dev/mcp", "config": { "mcpServers": { "tldraw": { "url": "https://tldraw-mcp-app.tldraw.workers.dev/mcp" } } } }, "letme": { "capability": "https://letme.dev/diagram.create", "tool": "https://letme.dev/tldraw" }, "area": "design-diagrams", "provenance": { "legalEntity": "tldraw, Inc.", "domain": "tldraw.dev", "domainRegistered": "2022-04-11", "endpointOnVendorDomain": false, "terms": "https://www.tldraw.com/tos.html", "privacy": "https://www.tldraw.com/privacy.html", "statusPage": "", "changelog": "https://tldraw.dev/releases", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "The hosted MCP App runs on a workers.dev subdomain, not on a tldraw domain" ], "score": 51 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/tldraw.json", "live": { "slug": "tldraw", "probe": { "target": "https://tldraw-mcp-app.tldraw.workers.dev/mcp", "method": "mcp-initialize", "lastAt": "2026-10-09T11:46:43.0982888Z", "lastOk": true, "lastStatus": 200, "lastMs": 1006, "lastNote": "initialize answered", "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 777, "p95ms24h": 1145, "samples24h": 259, "samples30d": 2311, "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": 125, "ok": 125 } ] }, "versions": [ { "registry": "github", "name": "tldraw/tldraw", "version": "v5.5.2", "released": "2026-10-02", "seenAt": "2026-10-08T16:32:14.379150021Z" }, { "registry": "mcp-registry", "name": "io.github.tldraw/tldraw", "version": "0.1.0", "seenAt": "2026-10-09T02:57:46.004536428Z" }, { "registry": "npm", "name": "tldraw", "version": "5.5.2", "seenAt": "2026-10-08T16:32:13.583204081Z" } ], "githubStars": 50816, "npmWeekly": 512558, "securityTxt": { "url": "https://tldraw.dev/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:39:07.051286448Z" }, "llmsTxt": { "url": "https://tldraw.dev/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:56.680181579Z" }, "domain": { "domain": "tldraw.dev", "registered": "2022-04-11", "source": "https://pubapi.registry.google/rdap/domain/tldraw.dev", "checkedAt": "2026-10-04T13:10:18.060433565Z" }, "pages": [ { "url": "https://tldraw.dev/releases", "kind": "changelog", "status": 304, "checkedAt": "2026-10-08T18:25:19.459930809Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "6de3df0f9614" }, { "url": "https://tldraw.dev/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:25:17.082181385Z", "changedAt": "2026-10-08T18:25:17.082181385Z", "fingerprint": "5f8bf1cdd732" }, { "url": "https://www.tldraw.com/privacy.html", "kind": "privacy", "status": 0, "checkedAt": "2026-10-08T18:30:58.982287729Z", "changedAt": "0001-01-01T00:00:00Z", "blockedByRobots": true }, { "url": "https://www.tldraw.com/tos.html", "kind": "terms", "status": 0, "checkedAt": "2026-10-08T18:30:59.132351962Z", "changedAt": "0001-01-01T00:00:00Z", "blockedByRobots": true } ], "updatedAt": "2026-10-09T11:46:43.0982888Z" } }, "facts": [ { "a": "SDK + MCP", "b": "SDK + MCP", "name": "Kind" }, { "a": "PlantUML project (Arnaud Roques)", "b": "tldraw", "name": "Vendor" }, { "a": "no (local only)", "b": "https://tldraw-mcp-app.tldraw.workers.dev/mcp", "name": "Hosted endpoint" }, { "a": "", "b": "Streamable HTTP, SSE (legacy)", "name": "Transports" }, { "a": "None", "b": "None", "name": "Auth" }, { "a": "Free", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "GPL-3.0-or-later", "b": "tldraw licence (source-available, production needs a licence key)", "name": "Licence" }, { "a": "none", "b": "6", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "not listed", "b": "io.github.tldraw/tldraw", "name": "MCP registry" }, { "a": "2026-09-05", "b": "2026-09-30", "name": "Last release" }, { "a": "no document linked", "b": "couldn't be read", "name": "Terms last updated" }, { "a": "no document linked", "b": "couldn't be read", "name": "Privacy policy last updated" }, { "a": "", "b": "couldn't be read", "name": "Customer content may train models" }, { "a": "", "b": "couldn't be read", "name": "Terms restrict automated access" }, { "a": "", "b": "couldn't be read", "name": "Terms restrict benchmarking" }, { "a": "", "b": "couldn't be read", "name": "Terms or service can change without notice" }, { "a": "", "b": "couldn't be read", "name": "Arbitration or class-action waiver" }, { "a": "13k stars, 207 npm/wk", "b": "51k stars, 490k npm/wk", "name": "Popularity" }, { "a": "none", "b": "3/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "PlantUML scores 66.9 (B) on agent readiness against tldraw SDK + MCP's 60.7 (C), and leads in 5 of 7 scored categories. tldraw SDK + MCP leads on schema \u0026 documentation and maintenance \u0026 community.", "question": "Which is better for AI agents, PlantUML or tldraw SDK + MCP?" }, { "answer": "PlantUML is open source (GPL-3.0-or-later). No open-source release is listed for tldraw SDK + MCP.", "question": "Are PlantUML and tldraw SDK + MCP open source?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 83 against 75", "Agent ergonomics, 78 against 71", "Security \u0026 auth, 50 against 40", "Payments \u0026 pricing, 60 against 35", "Transparency \u0026 trust, 73 against 48" ], "also": [ "Open source" ], "goodFor": "Agents that write sequence, class, state, component, deployment, Gantt or C4 diagrams as text and render them locally or in CI.", "slug": "plantuml", "watchFor": "The default security profile is LEGACY, which gives diagram text full access to local files and URLs through `!include`. The docs say it will be removed, with no date" }, { "aheadOn": [ "Schema \u0026 documentation, 79 against 65", "Maintenance \u0026 community, 89 against 73" ], "also": [ "A hosted endpoint, with nothing to install" ], "goodFor": "Teams building a product where a person and an agent share a canvas.", "slug": "tldraw", "watchFor": "Source-available, and commercial prices aren't published" } ], "job": { "capability": "diagram.as-code", "name": "Diagram as code" }, "others": [ { "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-tldraw.json", "title": "Cloudviz API vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/diagrams-so-vs-plantuml.json", "title": "Diagrams.so API + MCP vs PlantUML", "url": "https://www.anchorterminal.com/compare/diagrams-so-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/diagrams-so-vs-tldraw.json", "title": "Diagrams.so API + MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/diagrams-so-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/drawio-vs-plantuml.json", "title": "draw.io + MCP vs PlantUML", "url": "https://www.anchorterminal.com/compare/drawio-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/drawio-vs-tldraw.json", "title": "draw.io + MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/drawio-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/eraser-vs-plantuml.json", "title": "Eraser API + MCP vs PlantUML", "url": "https://www.anchorterminal.com/compare/eraser-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/eraser-vs-tldraw.json", "title": "Eraser API + MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/eraser-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/lucid-vs-plantuml.json", "title": "Lucid API + MCP vs PlantUML", "url": "https://www.anchorterminal.com/compare/lucid-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/lucid-vs-tldraw.json", "title": "Lucid API + MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/lucid-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/mermaid-chart-vs-plantuml.json", "title": "Mermaid Chart MCP vs PlantUML", "url": "https://www.anchorterminal.com/compare/mermaid-chart-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/mermaid-chart-vs-tldraw.json", "title": "Mermaid Chart MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/mermaid-chart-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/mural-mcp-vs-plantuml.json", "title": "Mural MCP vs PlantUML", "url": "https://www.anchorterminal.com/compare/mural-mcp-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/mural-mcp-vs-tldraw.json", "title": "Mural MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/mural-mcp-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/plantuml-vs-whimsical.json", "title": "PlantUML vs Whimsical MCP", "url": "https://www.anchorterminal.com/compare/plantuml-vs-whimsical" }, { "json": "https://www.anchorterminal.com/compare/structurizr-vs-tldraw.json", "title": "Structurizr + MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/structurizr-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/tldraw-vs-whimsical.json", "title": "tldraw SDK + MCP vs Whimsical MCP", "url": "https://www.anchorterminal.com/compare/tldraw-vs-whimsical" }, { "json": "https://www.anchorterminal.com/compare/d2-vs-plantuml.json", "title": "D2 vs PlantUML", "url": "https://www.anchorterminal.com/compare/d2-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/d2-vs-tldraw.json", "title": "D2 vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/d2-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/plantuml-vs-structurizr.json", "title": "PlantUML vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/plantuml-vs-structurizr" } ], "scores": [ { "by": 8, "edge": "plantuml", "key": "reliability", "name": "Reliability", "plantuml": 83, "tldraw": 75, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 14, "edge": "tldraw", "key": "schema", "name": "Schema \u0026 documentation", "plantuml": 65, "tldraw": 79, "weight": 13 }, { "by": 7, "edge": "plantuml", "key": "ergonomics", "name": "Agent ergonomics", "plantuml": 78, "tldraw": 71, "weight": 13 }, { "by": 10, "edge": "plantuml", "key": "security", "name": "Security \u0026 auth", "plantuml": 50, "tldraw": 40, "weight": 14 }, { "by": 25, "edge": "plantuml", "key": "payments", "name": "Payments \u0026 pricing", "plantuml": 60, "tldraw": 35, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 16, "edge": "tldraw", "key": "maintenance", "name": "Maintenance \u0026 community", "plantuml": 73, "tldraw": 89, "weight": 7 }, { "by": 25, "edge": "plantuml", "key": "transparency", "name": "Transparency \u0026 trust", "plantuml": 73, "tldraw": 48, "weight": 7 } ], "summary": "PlantUML scores 66.9 (B) on agent readiness against tldraw SDK + MCP's 60.7 (C), and leads in 5 of 7 scored categories. tldraw SDK + MCP leads on schema \u0026 documentation and maintenance \u0026 community. Both do diagram as code.", "verdicts": { "plantuml": "One Java command reads diagram text from stdin and writes PNG, SVG, PDF or ASCII with no account, and CI passed on the last eight pushes. The default security profile lets diagram text read any local file and fetch any URL, and the documentation still lists chronology diagrams that release 1.2026.2 switched off.", "tldraw": "Full editor API to create, read, bind and export shapes from code, with agent, chat and workflow starter kits. Source-available, and commercial prices aren't published." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/plantuml-vs-tldraw", "json": "https://www.anchorterminal.com/compare/plantuml-vs-tldraw.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/plantuml-vs-tldraw.md", "slim": "https://www.anchorterminal.com/compare/plantuml-vs-tldraw.min.md" }, "markdown": "PlantUML scores 66.9 (B) on agent readiness against tldraw SDK + MCP's 60.7 (C), and leads in 5 of 7 scored categories. tldraw SDK + MCP leads on schema \u0026 documentation and maintenance \u0026 community. Both do diagram as code.\n\n- PlantUML: grade B, 66.9/100, rank #251 of 842. Markdown https://www.anchorterminal.com/tools/plantuml.md · JSON https://www.anchorterminal.com/api/v1/tools/plantuml.json\n- tldraw SDK + MCP: grade C, 60.7/100, rank #451 of 842. Markdown https://www.anchorterminal.com/tools/tldraw.md · JSON https://www.anchorterminal.com/api/v1/tools/tldraw.json\n\n## Which one, for what\n\n### PlantUML (B)\n\nGood for: Agents that write sequence, class, state, component, deployment, Gantt or C4 diagrams as text and render them locally or in CI.\n\nAhead on:\n- Reliability, 83 against 75\n- Agent ergonomics, 78 against 71\n- Security \u0026 auth, 50 against 40\n- Payments \u0026 pricing, 60 against 35\n- Transparency \u0026 trust, 73 against 48\n\nAlso in its favour:\n- Open source\n\nWatch for: The default security profile is LEGACY, which gives diagram text full access to local files and URLs through `!include`. The docs say it will be removed, with no date\n\n### tldraw SDK + MCP (C)\n\nGood for: Teams building a product where a person and an agent share a canvas.\n\nAhead on:\n- Schema \u0026 documentation, 79 against 65\n- Maintenance \u0026 community, 89 against 73\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n\nWatch for: Source-available, and commercial prices aren't published\n\n\n## Score by category\n\n| Category | Weight | PlantUML | tldraw SDK + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 83 | 75 | PlantUML +8 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 65 | 79 | tldraw SDK + MCP +14 |\n| Agent ergonomics | 13% (16.2 this run) | 78 | 71 | PlantUML +7 |\n| Security \u0026 auth | 14% (17.5 this run) | 50 | 40 | PlantUML +10 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 35 | PlantUML +25 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 73 | 89 | tldraw SDK + MCP +16 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 73 | 48 | PlantUML +25 |\n| Negative events | ≤15 | -2 | -2 | |\n| **Total** | | **66.9 · B** | **60.7 · C** | |\n\n## Facts side by side\n\n| Fact | PlantUML | tldraw SDK + MCP |\n| --- | --- | --- |\n| Kind | SDK + MCP | SDK + MCP |\n| Vendor | PlantUML project (Arnaud Roques) | tldraw |\n| Hosted endpoint | no (local only) | `https://tldraw-mcp-app.tldraw.workers.dev/mcp` |\n| Transports | | Streamable HTTP, SSE (legacy) |\n| Auth | None | None |\n| Pricing | Free | Paid |\n| x402 | no | no |\n| Licence | GPL-3.0-or-later | tldraw licence (source-available, production needs a licence key) |\n| Tools exposed | none | 6 |\n| Read-only variant documented | no | no |\n| llms.txt | no | yes |\n| MCP registry | not listed | `io.github.tldraw/tldraw` |\n| Last release | 2026-09-05 | 2026-09-30 |\n| Terms last updated | no document linked | couldn't be read |\n| Privacy policy last updated | no document linked | couldn't be read |\n| Customer content may train models | | couldn't be read |\n| Terms restrict automated access | | couldn't be read |\n| Terms restrict benchmarking | | couldn't be read |\n| Terms or service can change without notice | | couldn't be read |\n| Arbitration or class-action waiver | | couldn't be read |\n| Popularity | 13k stars, 207 npm/wk | 51k stars, 490k npm/wk |\n| Agent reviews | none | 3/5 (2) |\n\n## Verdicts\n\n**PlantUML.** One Java command reads diagram text from stdin and writes PNG, SVG, PDF or ASCII with no account, and CI passed on the last eight pushes. The default security profile lets diagram text read any local file and fetch any URL, and the documentation still lists chronology diagrams that release 1.2026.2 switched off.\n\n**tldraw SDK + MCP.** Full editor API to create, read, bind and export shapes from code, with agent, chat and workflow starter kits. Source-available, and commercial prices aren't published.\n\n## Before you call either\n\n### PlantUML\n\n1. Set `PLANTUML_SECURITY_PROFILE` to `SANDBOX` or `ALLOWLIST` before rendering text from an untrusted source. The default profile lets `!include` read local files and fetch URLs\n2. Run `java -jar plantuml.jar --check-syntax` with `-stdrpt` first and read the exit status. Without `--no-error-image` a syntax error still writes an image of the error text\n3. Pass `-pipe` with `--svg`, `--txt` or `--utxt` to work without files. `--txt` output suits a text-only model\n4. Start the local server as `-picoweb:8080:127.0.0.1`. Without the bind address it listens on every interface\n5. Use `npx -y @plantuml/mcp-js` when no Java runtime is present. It renders SVG only, so use the jar for PNG or PDF\n\n### tldraw SDK + MCP\n\n1. Through the MCP App, call `search` on the Editor API spec first, then `exec` with JavaScript that calls `editor` methods\n2. Omit `canvasId` to start a blank canvas, and pass the returned `canvasId` to keep editing the same one\n3. Paste Mermaid into the canvas to get editable shapes instead of placing each shape by hand\n4. Return `editor.getCurrentPageShapes()` from `exec` to check what was drawn\n5. Read the release notes before a minor upgrade. Minor versions can break\n\n## Questions\n\n### Which is better for AI agents, PlantUML or tldraw SDK + MCP?\n\nPlantUML scores 66.9 (B) on agent readiness against tldraw SDK + MCP's 60.7 (C), and leads in 5 of 7 scored categories. tldraw SDK + MCP leads on schema \u0026 documentation and maintenance \u0026 community.\n\n### Are PlantUML and tldraw SDK + MCP open source?\n\nPlantUML is open source (GPL-3.0-or-later). No open-source release is listed for tldraw SDK + MCP.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/plantuml-vs-tldraw.json, and with the fewest tokens: https://www.anchorterminal.com/compare/plantuml-vs-tldraw.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"plantuml\", \"b\": \"tldraw\"}`. From a terminal: `anchor compare plantuml tldraw`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/plantuml.json and https://www.anchorterminal.com/api/v1/tools/tldraw.json\n\n## Other comparisons with PlantUML or tldraw SDK + MCP\n\n- [Cloudviz API vs PlantUML](https://www.anchorterminal.com/compare/cloudviz-vs-plantuml.md)\n- [Cloudviz API vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-tldraw.md)\n- [Diagrams.so API + MCP vs PlantUML](https://www.anchorterminal.com/compare/diagrams-so-vs-plantuml.md)\n- [Diagrams.so API + MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/diagrams-so-vs-tldraw.md)\n- [draw.io + MCP vs PlantUML](https://www.anchorterminal.com/compare/drawio-vs-plantuml.md)\n- [draw.io + MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/drawio-vs-tldraw.md)\n- [Eraser API + MCP vs PlantUML](https://www.anchorterminal.com/compare/eraser-vs-plantuml.md)\n- [Eraser API + MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/eraser-vs-tldraw.md)\n- [Lucid API + MCP vs PlantUML](https://www.anchorterminal.com/compare/lucid-vs-plantuml.md)\n- [Lucid API + MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/lucid-vs-tldraw.md)\n- [Mermaid Chart MCP vs PlantUML](https://www.anchorterminal.com/compare/mermaid-chart-vs-plantuml.md)\n- [Mermaid Chart MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/mermaid-chart-vs-tldraw.md)\n- [Mural MCP vs PlantUML](https://www.anchorterminal.com/compare/mural-mcp-vs-plantuml.md)\n- [Mural MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/mural-mcp-vs-tldraw.md)\n- [PlantUML vs Whimsical MCP](https://www.anchorterminal.com/compare/plantuml-vs-whimsical.md)\n- [Structurizr + MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/structurizr-vs-tldraw.md)\n- [tldraw SDK + MCP vs Whimsical MCP](https://www.anchorterminal.com/compare/tldraw-vs-whimsical.md)\n- [D2 vs PlantUML](https://www.anchorterminal.com/compare/d2-vs-plantuml.md)\n- [D2 vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/d2-vs-tldraw.md)\n- [PlantUML vs Structurizr + MCP](https://www.anchorterminal.com/compare/plantuml-vs-structurizr.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-09", "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": "PlantUML vs tldraw SDK + MCP", "url": "" } ], "description": "PlantUML scores 66.9 (B) on agent readiness against tldraw SDK + MCP's 60.7 (C), and leads in 5 of 7 scored categories. tldraw SDK + MCP leads on schema \u0026 documentation and maintenance \u0026 community. 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