{
  "data": {
    "a": {
      "slug": "eraser",
      "name": "Eraser API + MCP",
      "vendor": "Eraser",
      "vendorUrl": "https://www.eraser.io",
      "kind": "http-api",
      "category": "diagramming",
      "summary": "Docs and diagrams workspace for engineers.",
      "url": "https://www.anchorterminal.com/tools/eraser",
      "markdownUrl": "https://www.anchorterminal.com/tools/eraser.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/eraser.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/eraser.json",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://app.eraser.io/api",
      "packages": [
        {
          "registry": "npm",
          "name": "@eraserlabs/eraser-mcp"
        }
      ],
      "auth": "mixed",
      "authNotes": "REST API takes a team API token as a Bearer header, and tokens are only issued to paid teams. The hosted MCP uses OAuth by default (billed to the signed-in user's AI credits) or the same token as a Bearer header (billed to team credits). The local npm server reads ERASER_API_KEY.",
      "pricing": "freemium",
      "pricingNotes": "Free plan $0 with 3 AI diagrams. Starter $15 a member a month billed yearly ($20 monthly) with 40 AI credits, Business $45 billed yearly ($60 monthly) with 250, Enterprise custom. The API needs a paid plan with usage-based pricing switched on. /render/prompt costs $80 per 100 calls, /render/elements $20 per 100 calls, extra AI credits $60 per 100. The MCP server is free within plan limits (https://www.eraser.io/pricing).",
      "priceSummary": "$20 / seat-mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in docs or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 42,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 76,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.eraser.io/reference/getting-started",
      "llmsTxt": "https://docs.eraser.io/llms.txt",
      "registryName": "io.eraser/eraser",
      "capabilities": [
        "diagram.create",
        "diagram.as-code",
        "diagram.edit",
        "diagram.export",
        "diagram.architecture"
      ],
      "tags": [
        "hosted",
        "freemium",
        "mcp",
        "llms-txt",
        "diagram-as-code",
        "closed-source",
        "enterprise",
        "typescript"
      ],
      "lastRelease": "2026-05-22",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 38.7,
        "grade": "E",
        "agentReady": false,
        "rank": 427,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 7,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 34,
          "maintenance": 33,
          "payments": 35,
          "reliability": 15,
          "schema": 52,
          "security": 57,
          "transparency": 51
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Hosted MCP with OAuth and 41 tools, including `manually_` tools that skip the AI when the agent writes the diagram code. No status page, rate limits, SLA or changelog.",
        "strengths": [
          "Hosted MCP with OAuth and 41 tools, including `manually_` tools that skip the AI when the agent writes the diagram code",
          "Diagram-as-code for architecture, flowchart, ERD, sequence and BPMN diagrams",
          "Per-call API prices published, $0.80 per AI render and $0.20 per code render",
          "SOC 2 Type 2 report, and an audit log API with ECS and Splunk formats on Enterprise"
        ],
        "weaknesses": [
          "No status page, rate limits, SLA or changelog",
          "No OpenAPI file, and the hosted tool definitions aren't public",
          "REST API needs a paid team plus usage-based billing, with one unscoped token per team",
          "41 tools load at once with no subset",
          "Newest dated change found is 22 May 2026"
        ],
        "agentNotes": [
          "Use `manually_create_diagram` with your own Eraser code when you know the structure. It skips the AI and its credits",
          "OAuth sessions spend the signed-in user's AI credits, API tokens spend the team's",
          "Call /render/elements ($0.20) when you already have diagram code; /render/prompt costs $0.80",
          "Set a spend limit before running in CI. At 100 per cent the API stops until the next calendar month"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "E",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 38.7
          }
        ],
        "editorialScores": {
          "ergonomics": 34,
          "maintenance": 33,
          "payments": 35,
          "reliability": 15,
          "schema": 52,
          "security": 57,
          "transparency": 31
        },
        "provenanceScore": 70
      },
      "connect": {
        "http": "curl -X POST https://app.eraser.io/api/render/prompt -H \"Authorization: Bearer $ERASER_API_KEY\" \\\n  -H \"Content-Type: application/json\" -d '{\"text\":\"Draw a data model for a Twitter clone\"}'",
        "claudeCode": "claude mcp add --transport http eraser https://app.eraser.io/api/mcp",
        "config": {
          "mcpServers": {
            "eraser": {
              "args": [
                "-y",
                "@eraserlabs/eraser-mcp"
              ],
              "command": "npx",
              "env": {
                "ERASER_API_KEY": "${ERASER_API_KEY}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/diagram.create",
        "tool": "https://letme.dev/eraser"
      },
      "area": "design-diagrams",
      "unitPrices": [
        {
          "item": "Starter plan",
          "unit": "seat-month",
          "usd": 20,
          "note": "billed monthly, $15 billed yearly. First plan with API access"
        },
        {
          "item": "Business plan",
          "unit": "seat-month",
          "usd": 60,
          "note": "billed monthly, $45 billed yearly"
        },
        {
          "item": "API /render/prompt",
          "unit": "call",
          "usd": 0.8,
          "note": "$80 per 100 calls, AI generation"
        },
        {
          "item": "API /render/elements",
          "unit": "call",
          "usd": 0.2,
          "note": "$20 per 100 calls, renders your own diagram code"
        },
        {
          "item": "Extra AI credits",
          "unit": "credit",
          "usd": 0.6,
          "note": "$60 per 100 credits beyond the plan"
        }
      ],
      "provenance": {
        "legalEntity": "Eraser Labs, Inc.",
        "domain": "eraser.io",
        "domainRegistered": "2014-10-03",
        "endpointOnVendorDomain": true,
        "terms": "https://www.eraser.io/terms",
        "privacy": "https://www.eraser.io/privacy",
        "statusPage": "",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-01",
        "notes": [
          "Eraser Labs, Inc., 548 Market St, PMB 47670, San Francisco, CA 94104 (privacy policy)",
          "SOC 2 Type 2 report available through the trust portal at eraser.trustshare.com",
          "status.eraser.io doesn't resolve and eraser.io/changelog returns 404",
          "security.txt not rechecked on 2026-10-01; none per the 30 September check"
        ],
        "score": 70
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/eraser.json",
      "live": {
        "slug": "eraser",
        "probe": {
          "target": "https://app.eraser.io/api",
          "method": "get",
          "lastAt": "2026-10-05T02:29:55.543969735Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 136,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 143,
          "p95ms24h": 424,
          "samples24h": 273,
          "samples30d": 1131,
          "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": 29,
              "ok": 29
            }
          ]
        },
        "versions": [
          {
            "registry": "mcp-registry",
            "name": "io.eraser/eraser",
            "version": "0.2.0",
            "seenAt": "2026-10-04T23:42:40.113054682Z"
          },
          {
            "registry": "npm",
            "name": "@eraserlabs/eraser-mcp",
            "version": "0.8.0",
            "seenAt": "2026-10-04T16:26:40.51897259Z"
          }
        ],
        "npmWeekly": 91,
        "securityTxt": {
          "url": "https://eraser.io/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:54.712764659Z"
        },
        "llmsTxt": {
          "url": "https://docs.eraser.io/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:45.173695534Z"
        },
        "domain": {
          "domain": "eraser.io",
          "checkedAt": "2026-10-04T13:07:10.744092154Z"
        },
        "pages": [
          {
            "url": "https://www.eraser.io/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:50:12.049190538Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "308b8025c589"
          },
          {
            "url": "https://www.eraser.io/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:50:14.104270218Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "0a831aeafaf4"
          },
          {
            "url": "https://www.eraser.io/terms",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:50:16.099759122Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "45be14fec815"
          }
        ],
        "updatedAt": "2026-10-05T02:29:55.543969735Z"
      }
    },
    "b": {
      "slug": "structurizr",
      "name": "Structurizr + MCP",
      "vendor": "Structurizr",
      "vendorUrl": "https://structurizr.com",
      "kind": "http-api",
      "category": "diagramming",
      "summary": "Diagram-as-code tool for software architecture using the C4 model.",
      "url": "https://www.anchorterminal.com/tools/structurizr",
      "markdownUrl": "https://www.anchorterminal.com/tools/structurizr.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/structurizr.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/structurizr.json",
      "repo": "https://github.com/structurizr/structurizr",
      "license": "Apache-2.0",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://mcp.structurizr.com/mcp",
      "packages": [],
      "auth": "mixed",
      "authNotes": "The workspace API on a Structurizr server takes a per-workspace key in the X-Authorization header, and listing all workspaces needs the admin API key. Server authentication can be switched off. The hosted MCP at mcp.structurizr.com needs no key.",
      "pricing": "freemium",
      "pricingNotes": "The DSL, local, the playground and the MCP server are free and Apache 2.0. Running the server from the prebuilt binaries needs a yearly licence priced by unique users (people or automated processes) per installation, from £300 a month for 1 to 20 users up to £2,400 a month for over 1,000, billed annually and bought by email, paid by bank transfer or PayPal invoice. 14-day trial licence from trial.structurizr.com. Building the server from source needs no licence. The cloud service took no new sign-ups after 31 December 2025 and shut down on 30 September 2026 (https://docs.structurizr.com/server/pricing).",
      "priceSummary": "$400 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": 6,
      "popularity": {
        "githubStars": 419,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.structurizr.com",
      "openapi": "https://raw.githubusercontent.com/structurizr/structurizr/refs/heads/main/structurizr-json/structurizr.yaml",
      "capabilities": [
        "diagram.create",
        "diagram.as-code",
        "diagram.edit",
        "diagram.export",
        "diagram.architecture"
      ],
      "tags": [
        "open-source",
        "self-hosted",
        "local",
        "hosted",
        "mcp",
        "diagram-as-code",
        "openapi",
        "free-tier"
      ],
      "lastRelease": "2026-09-19",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 60.2,
        "grade": "C",
        "agentReady": false,
        "rank": 252,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 4,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 55,
          "maintenance": 68,
          "payments": 50,
          "reliability": 73,
          "schema": 61,
          "security": 43,
          "transparency": 80
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "One model can generate several C4 architecture views. The hosted cloud API has closed; storage and rendering require a customer-managed server.",
        "strengths": [
          "One text model yields context, container, component, dynamic and deployment views",
          "Free hosted MCP at mcp.structurizr.com validates, parses, inspects and exports DSL with no key",
          "Apache 2.0 code, an OpenAPI 3.0 definition and dated changelogs",
          "Release 2026.09.19 on 19 September 2026, with reported issues fixed within weeks",
          "Nine months' dated notice before the cloud service shut down"
        ],
        "weaknesses": [
          "The hosted cloud API is gone. Storage and rendering need your own server",
          "Prebuilt server binaries need a paid licence counted per unique user, including API clients",
          "The MCP module is labelled experimental, with one-line tool descriptions",
          "Self-hosted MCP server tools take the workspace API key as a tool argument",
          "No security.txt or disclosure policy, and one maintainer wrote every commit since February"
        ],
        "agentNotes": [
          "Call `validate` and then `inspect` on the DSL before pushing a workspace",
          "Use the Mermaid export when the diagram has to render in Markdown without a Structurizr server",
          "Export needs a view key. Parse the DSL first to list the views",
          "Run the `structurizr/mcp` image with only the flags you need, such as `-dsl -server-read`, to keep write and delete tools out of reach",
          "The workspace API returns JSON, never images. PNG and SVG come from the separate export command"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 60.2
          }
        ],
        "editorialScores": {
          "ergonomics": 55,
          "maintenance": 68,
          "payments": 50,
          "reliability": 73,
          "schema": 61,
          "security": 43,
          "transparency": 80
        },
        "provenanceScore": 80
      },
      "connect": {
        "http": "curl \"$STRUCTURIZR_URL/api/workspace/1\" -H \"X-Authorization: $STRUCTURIZR_API_KEY\"",
        "claudeCode": "claude mcp add --transport http structurizr https://mcp.structurizr.com/mcp",
        "config": {
          "mcpServers": {
            "structurizr": {
              "url": "https://mcp.structurizr.com/mcp"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/diagram.create",
        "tool": "https://letme.dev/structurizr"
      },
      "area": "design-diagrams",
      "unitPrices": [
        {
          "item": "Server licence, 1 to 20 users",
          "unit": "month",
          "usd": 400,
          "note": "£300 a month billed annually, converted at about $1.34 a pound"
        },
        {
          "item": "Server licence, 21 to 50 users",
          "unit": "month",
          "usd": 800,
          "note": "£600 a month billed annually, converted at about $1.34 a pound"
        }
      ],
      "provenance": {
        "legalEntity": "Structurizr Limited",
        "domain": "structurizr.com",
        "domainRegistered": "2013-11-04",
        "endpointOnVendorDomain": true,
        "terms": "https://structurizr.com/terms-and-conditions",
        "privacy": "https://structurizr.com/privacy-policy",
        "statusPage": "",
        "changelog": "https://github.com/structurizr/structurizr/blob/main/changelog-application.md",
        "securityTxt": "none",
        "checked": "2026-10-01",
        "notes": [
          "Structurizr Limited is a private company registered in Jersey, Channel Islands, Jersey Financial Services Commission registry number 303857 (server EULA)",
          "The Pingdom status page linked from structurizr.com monitored the cloud service, which shut down on 30 September 2026, so it isn't listed",
          "Server terms and privacy policy for the licence also live at https://docs.structurizr.com/server/terms-and-conditions and https://docs.structurizr.com/server/privacy-policy"
        ],
        "score": 80
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/structurizr.json",
      "live": {
        "slug": "structurizr",
        "probe": {
          "target": "https://mcp.structurizr.com/mcp",
          "method": "get",
          "lastAt": "2026-10-05T02:30:03.187981621Z",
          "lastOk": true,
          "lastStatus": 405,
          "lastMs": 72,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 73,
          "p95ms24h": 130,
          "samples24h": 273,
          "samples30d": 1131,
          "days": [
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              "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": 29,
              "ok": 29
            }
          ]
        },
        "versions": [
          {
            "registry": "github",
            "name": "structurizr/structurizr",
            "version": "v2026.09.19",
            "released": "2026-09-19",
            "seenAt": "2026-10-04T16:40:53.233176332Z"
          }
        ],
        "githubStars": 430,
        "securityTxt": {
          "url": "https://structurizr.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:16:01.092085413Z"
        },
        "domain": {
          "domain": "structurizr.com",
          "registered": "2013-11-04",
          "source": "https://rdap.verisign.com/com/v1/domain/structurizr.com",
          "checkedAt": "2026-10-04T13:06:16.957209253Z"
        },
        "pages": [
          {
            "url": "https://raw.githubusercontent.com/structurizr/structurizr/main/changelog-application.md",
            "kind": "changelog",
            "status": 304,
            "checkedAt": "2026-10-04T15:47:53.255452397Z",
            "changedAt": "2026-10-02T15:24:03.368547202Z",
            "fingerprint": "7d7f8d519415"
          },
          {
            "url": "https://docs.structurizr.com/cloud",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:04.126207686Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "f3914c04c843"
          },
          {
            "url": "https://docs.structurizr.com/server/pricing",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:44:06.275958227Z",
            "changedAt": "2026-10-02T15:20:28.925834824Z",
            "fingerprint": "30400863f0dd"
          },
          {
            "url": "https://structurizr.com/privacy-policy",
            "kind": "privacy",
            "status": 404,
            "checkedAt": "2026-10-04T15:48:12.397727012Z",
            "changedAt": "0001-01-01T00:00:00Z"
          },
          {
            "url": "https://structurizr.com/terms-and-conditions",
            "kind": "terms",
            "status": 404,
            "checkedAt": "2026-10-04T15:48:14.526904538Z",
            "changedAt": "0001-01-01T00:00:00Z"
          }
        ],
        "updatedAt": "2026-10-05T02:30:03.187981621Z"
      }
    },
    "summary": "Structurizr + MCP has a score of 60.2 (C) against Eraser API + MCP's 38.7 (E). Both do diagram create. The largest gap is reliability, 58 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/eraser-vs-structurizr",
    "json": "https://www.anchorterminal.com/compare/eraser-vs-structurizr.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/eraser-vs-structurizr.md",
    "slim": "https://www.anchorterminal.com/compare/eraser-vs-structurizr.min.md"
  },
  "markdown": "Structurizr + MCP has a score of 60.2 (C) against Eraser API + MCP's 38.7 (E). Both do diagram create. The largest gap is reliability, 58 points.\n\n- Eraser API + MCP: grade E, 38.7/100, rank #427 of 452. Markdown https://www.anchorterminal.com/tools/eraser.md · JSON https://www.anchorterminal.com/api/v1/tools/eraser.json\n- Structurizr + MCP: grade C, 60.2/100, rank #252 of 452. Markdown https://www.anchorterminal.com/tools/structurizr.md · JSON https://www.anchorterminal.com/api/v1/tools/structurizr.json\n\n## Which one, for what\n\nPick Eraser API + MCP for security \u0026 auth (+14).\n\nPick Structurizr + MCP for reliability (+58), schema \u0026 documentation (+9), agent ergonomics (+21), payments \u0026 pricing (+15), maintenance \u0026 community (+35), transparency \u0026 trust (+29).\n\n## Score by category\n\n| Category | Weight | Eraser API + MCP | Structurizr + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 15 | 73 | Structurizr + MCP +58 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 52 | 61 | Structurizr + MCP +9 |\n| Agent ergonomics | 13% (16.2 this run) | 34 | 55 | Structurizr + MCP +21 |\n| Security \u0026 auth | 14% (17.5 this run) | 57 | 43 | Eraser API + MCP +14 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 50 | Structurizr + MCP +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 33 | 68 | Structurizr + MCP +35 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 51 | 80 | Structurizr + MCP +29 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **38.7 · E** | **60.2 · C** | |\n\n## Facts side by side\n\n| Fact | Eraser API + MCP | Structurizr + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Eraser | Structurizr |\n| Hosted endpoint | `https://app.eraser.io/api` | `https://mcp.structurizr.com/mcp` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | none | Apache-2.0 |\n| Tools exposed | 42 | 6 |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| MCP registry | `io.eraser/eraser` | not listed |\n| Last release | 2026-05-22 | 2026-09-19 |\n| Popularity | 76 npm/wk | 419 stars |\n| Agent reviews | 3/5 (2) | 3/5 (2) |\n\n## Verdicts\n\n**Eraser API + MCP.** Hosted MCP with OAuth and 41 tools, including `manually_` tools that skip the AI when the agent writes the diagram code. No status page, rate limits, SLA or changelog.\n\n**Structurizr + MCP.** One model can generate several C4 architecture views. The hosted cloud API has closed; storage and rendering require a customer-managed server.\n\n## Before you call either\n\n### Eraser API + MCP\n\n1. Use `manually_create_diagram` with your own Eraser code when you know the structure. It skips the AI and its credits\n2. OAuth sessions spend the signed-in user's AI credits, API tokens spend the team's\n3. Call /render/elements ($0.20) when you already have diagram code; /render/prompt costs $0.80\n4. Set a spend limit before running in CI. At 100 per cent the API stops until the next calendar month\n\n### Structurizr + MCP\n\n1. Call `validate` and then `inspect` on the DSL before pushing a workspace\n2. Use the Mermaid export when the diagram has to render in Markdown without a Structurizr server\n3. Export needs a view key. Parse the DSL first to list the views\n4. Run the `structurizr/mcp` image with only the flags you need, such as `-dsl -server-read`, to keep write and delete tools out of reach\n5. The workspace API returns JSON, never images. PNG and SVG come from the separate export command\n\n## Other comparisons with Eraser API + MCP or Structurizr + MCP\n\n- [Cloudviz API vs Eraser API + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-eraser.md)\n- [Cloudviz API vs Structurizr + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-structurizr.md)\n- [Diagrams.so API + MCP vs Eraser API + MCP](https://www.anchorterminal.com/compare/diagrams-so-vs-eraser.md)\n- [Diagrams.so API + MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/diagrams-so-vs-structurizr.md)\n- [draw.io + MCP vs Eraser API + MCP](https://www.anchorterminal.com/compare/drawio-vs-eraser.md)\n- [draw.io + MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/drawio-vs-structurizr.md)\n- [Eraser API + MCP vs Lucid API + MCP](https://www.anchorterminal.com/compare/eraser-vs-lucid.md)\n- [Eraser API + MCP vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/eraser-vs-mermaid-chart.md)\n- [Eraser API + MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/eraser-vs-tldraw.md)\n- [Eraser API + MCP vs Whimsical MCP](https://www.anchorterminal.com/compare/eraser-vs-whimsical.md)\n- [Lucid API + MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/lucid-vs-structurizr.md)\n- [Mermaid Chart MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/mermaid-chart-vs-structurizr.md)\n- [Structurizr + MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/structurizr-vs-tldraw.md)\n- [Structurizr + MCP vs Whimsical MCP](https://www.anchorterminal.com/compare/structurizr-vs-whimsical.md)\n",
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        "name": "Eraser API + MCP vs Structurizr + MCP",
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    "description": "Structurizr + MCP has a score of 60.2 (C) against Eraser API + MCP's 38.7 (E). Both do diagram create. The largest gap is reliability, 58 points. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "Eraser API + MCP vs Structurizr + MCP for AI agents, E 38.7 vs C 60.2",
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