{
  "data": {
    "a": {
      "slug": "buttercms",
      "name": "ButterCMS",
      "vendor": "ButterCMS LLC",
      "vendorUrl": "https://buttercms.com",
      "kind": "http-api",
      "category": "cms",
      "summary": "ButterCMS is a hosted headless CMS with pages, collections and a blog engine. Agents read content through a REST Read API and create, update, publish and delete it through a REST Write API sold as a paid add-on.",
      "url": "https://www.anchorterminal.com/tools/buttercms",
      "markdownUrl": "https://www.anchorterminal.com/tools/buttercms.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/buttercms.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/buttercms.json",
      "repo": "https://github.com/ButterCMS/buttercms-js",
      "license": "Proprietary service under ButterCMS's terms of service. The SDKs and starter projects on GitHub are MIT",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.buttercms.com/v2",
      "packages": [
        {
          "registry": "npm",
          "name": "buttercms"
        },
        {
          "registry": "pypi",
          "name": "buttercms-python"
        }
      ],
      "auth": "api-key",
      "authNotes": "Self-serve for reads, paid add-on for writes. A person signs up in a browser and copies the read token from Settings. The write token exists only after the Write API add-on is bought under Settings, Billing, or enabled by support, and one docs page says this needs verification. The read token goes in the `auth_token` query parameter or an `Authorization: Token` header. The write token is accepted in the header only. There is one token of each kind per account, with no scopes, and the docs say tokens are rotated by contacting support. No OAuth, app review or sales approval for the listed plans.",
      "pricing": "freemium",
      "pricingNotes": "The Free plan needs no card and includes 50,000 API calls a month, but not the Write API. Writing needs Advanced ($249 a month, $224 billed yearly) or Professional ($399, $359 billed yearly) plus the Write API add-on, whose price is not published, with 2,000 or 5,000 write calls a month. Enterprise includes it and is sold through sales. Every plan has a 14-day trial (https://buttercms.com/pricing/, checked 2026-10-09).",
      "priceSummary": "$79 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the API docs, the OpenAPI files or the pricing page (checked 2026-10-09).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 6929,
        "pypiWeekly": null,
        "asOf": "2026-10-09"
      },
      "docsUrl": "https://buttercms.com/docs/api/overview",
      "llmsTxt": "https://buttercms.com/docs/llms.txt",
      "openapi": "https://buttercms.com/docs/api/openapi/openapi.yaml",
      "capabilities": [
        "cms.content",
        "cms.publish",
        "cms.assets",
        "cms.localisation"
      ],
      "tags": [
        "official",
        "hosted",
        "closed-source",
        "api-key",
        "openapi",
        "llms-txt",
        "webhooks",
        "free-tier",
        "no-card",
        "status-page",
        "javascript",
        "python",
        "php",
        "ruby"
      ],
      "lastRelease": "2025-09-04",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 53.3,
        "grade": "D",
        "agentReady": false,
        "rank": 711,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 14,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 64,
          "maintenance": 27,
          "payments": 20,
          "reliability": 83,
          "schema": 78,
          "security": 36,
          "transparency": 51
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-09"
        },
        "negative": -2,
        "negativeNotes": [
          "9 October 2026. The docs page on AI tools shows `butter.page.update(...)` as the way to write through the JavaScript SDK. The published SDK 3.0.3 has list, retrieve and search methods only, and the SDK overview says to call REST for writes (https://buttercms.com/docs/build-your-app/third-party-integrations/ai-tools-integration.md, https://github.com/ButterCMS/buttercms-js). 2 points."
        ],
        "verdict": "The Read and Write APIs have a public OpenAPI 3.1 file, Markdown docs and a status page with no incident since October 2025. The Write API is a paid add-on from the $249 plan, capped at 2,000 or 5,000 calls a month. Writes answer 202 with no identifier, support rotates tokens, and the terms are an undated website document.",
        "bestFor": "A team already on a paid ButterCMS plan that wants an agent to draft and publish pages, collection items and blog posts in small volumes.",
        "strengths": [
          "Public OpenAPI 3.1 files for the Read and Write APIs (25 operations, 328 examples), a docs llms.txt and a Markdown copy of every docs page",
          "status.buttercms.com lists three components and no incident since 20 October 2025",
          "Writes create drafts unless `status` is `published`, and the write token is separate from the read token and accepted only in a header",
          "Media fields take a URL and the service copies the file into the media library, so one request creates an entry with its image",
          "Free plan with no card and 50,000 API calls a month for reading, and dollar prices for four plans on the pricing page"
        ],
        "weaknesses": [
          "The Write API is a paid add-on on Advanced ($249 a month) and Professional ($399), capped at 2,000 and 5,000 write calls a month. Its price is not published",
          "Create and update calls answer 202 with `{\"status\": \"pending\"}` and no identifier, and there are no idempotency keys",
          "One read token and one write token per account, with no scopes. The docs say rotation is done by contacting support",
          "Page types and collections cannot be created through the API, pages cannot be deleted through it, and it has no version or rollback operation",
          "The terms are an undated website Terms of Service, the privacy policy dates from 15 August 2022 and covers the website, and a DPA is on request for Enterprise only",
          "No API changelog or deprecation policy was found. The JavaScript SDK's last release was 3.0.3 on 4 September 2025 and it has no write methods"
        ],
        "agentNotes": [
          "End every path with a slash. A missing slash returns a 301, and the vendor counts the redirect and the retry as two API calls",
          "Send the write token only as `Authorization: Token \u003ctoken\u003e`. The `auth_token` query parameter works for reads only",
          "On page creation send every field key of the page type, with empty strings for fields left blank",
          "A 202 means queued, not saved. Read the entry back with `preview=1` to confirm, and check a slug exists before retrying a create",
          "Call the REST API directly for writes. The JavaScript SDK 3.0.3 has list, retrieve and search methods only"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 53.3
          }
        ],
        "editorialScores": {
          "ergonomics": 64,
          "maintenance": 27,
          "payments": 20,
          "reliability": 83,
          "schema": 78,
          "security": 36,
          "transparency": 26
        },
        "provenanceScore": 76
      },
      "connect": {
        "install": "npm install buttercms --save",
        "http": "curl -H \"Authorization: Token your_api_token\" \\\n     \"https://api.buttercms.com/v2/posts/\""
      },
      "letme": {
        "capability": "https://letme.dev/cms.content",
        "tool": "https://letme.dev/buttercms"
      },
      "area": "business",
      "unitPrices": [
        {
          "item": "Basic",
          "unit": "month",
          "usd": 79,
          "note": "billed monthly, $71 billed yearly, 100,000 API calls, no Write API"
        },
        {
          "item": "Advanced",
          "unit": "month",
          "usd": 249,
          "note": "billed monthly, $224 billed yearly, 500,000 API calls, Write API add-on priced separately (up to 2,000 write calls)"
        },
        {
          "item": "Professional",
          "unit": "month",
          "usd": 399,
          "note": "billed monthly, $359 billed yearly, 1M API calls, Write API add-on priced separately (up to 5,000 write calls)"
        }
      ],
      "provenance": {
        "legalEntity": "ButterCMS LLC",
        "domain": "buttercms.com",
        "domainRegistered": "2015-03-24",
        "endpointOnVendorDomain": true,
        "terms": "https://buttercms.com/terms/",
        "privacy": "https://buttercms.com/privacy/",
        "statusPage": "https://status.buttercms.com",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-09",
        "notes": [
          "The privacy policy (last modified 15 August 2022) names ButterCMS LLC. The terms name only Butter and ButterCMS, carry no date, give a San Francisco postal address for DMCA notices and choose Michigan law.",
          "The terms are written as website Terms of Service and define the Website to include the services on it. The Write API's OpenAPI file names this page as its licence, so it is the only published contract for the API. No separate service agreement, API terms or SLA document was found.",
          "The privacy policy covers information collected on the website and says nothing about content stored in the CMS. The docs say a data processing agreement is available to Enterprise customers on request.",
          "A status page post about a DNS outage on 9 September 2024 says ButterCMS was acquired by Tiugo Technologies, and the site's careers link goes to Tiugo's recruiting page.",
          "The API answers at api.buttercms.com and the dashboard at app.buttercms.com.",
          "buttercms.com/.well-known/security.txt returns 404. The docs give security@buttercms.com for vulnerability reports.",
          "RDAP for buttercms.com gives a registration date of 2015-03-24 and Amazon Registrar, Inc. as registrar.",
          "No API changelog was found on the site or in the docs index. The JavaScript SDK repository has a CHANGELOG.md."
        ],
        "score": 76
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/buttercms.json",
      "live": {
        "slug": "buttercms",
        "probe": {
          "target": "https://api.buttercms.com/v2",
          "method": "get",
          "lastAt": "2026-10-10T02:07:04.45233745Z",
          "lastOk": false,
          "lastStatus": 0,
          "lastMs": 0,
          "lastNote": "too many redirects",
          "authRequired": false,
          "uptime24h": 0,
          "uptime30d": 0,
          "p50ms24h": 0,
          "p95ms24h": 0,
          "samples24h": 107,
          "samples30d": 107,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 85,
              "ok": 0
            },
            {
              "date": "2026-10-10",
              "probes": 22,
              "ok": 0
            }
          ],
          "outages": [
            {
              "start": "2026-10-09T15:43:00.096294667Z",
              "end": "0001-01-01T00:00:00Z",
              "note": "too many redirects"
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.buttercms.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-10T02:05:41.70225143Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "ButterCMS/buttercms-js",
            "version": "v3.0.3",
            "released": "2025-09-04",
            "seenAt": "2026-10-09T16:44:18.698940824Z"
          },
          {
            "registry": "npm",
            "name": "buttercms",
            "version": "3.0.3",
            "seenAt": "2026-10-09T16:44:17.650332238Z"
          },
          {
            "registry": "pypi",
            "name": "buttercms-python",
            "version": "2.1.1",
            "released": "2024-05-07",
            "seenAt": "2026-10-09T16:44:18.477928122Z"
          }
        ],
        "githubStars": 164,
        "npmWeekly": 6929,
        "pypiWeekly": 1093,
        "pages": [
          {
            "url": "https://buttercms.com/pricing/",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-09T18:33:26.750327748Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "9ba825b44b86"
          },
          {
            "url": "https://buttercms.com/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-09T18:33:29.190691009Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "908b6461f1b9"
          },
          {
            "url": "https://buttercms.com/terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-09T18:33:31.259657517Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "8862b63c94a5"
          }
        ],
        "updatedAt": "2026-10-10T02:07:04.45233745Z"
      }
    },
    "answer": "Contentstack scores 64 (B) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on reliability.",
    "b": {
      "slug": "contentstack",
      "name": "Contentstack",
      "vendor": "Contentstack Inc.",
      "vendorUrl": "https://www.contentstack.com",
      "kind": "http-api",
      "category": "cms",
      "summary": "Contentstack is a hosted headless CMS. Its Content Management API reads and writes entries, assets, content types, locales, releases and publishing across seven regional endpoints, and an official local MCP server wraps the same API for agents.",
      "url": "https://www.anchorterminal.com/tools/contentstack",
      "markdownUrl": "https://www.anchorterminal.com/tools/contentstack.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/contentstack.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/contentstack.json",
      "repo": "https://github.com/contentstack/contentstack-openapi",
      "license": "Proprietary service under Contentstack's Master Agreement and Terms of Service. The OpenAPI files, the management SDKs, the CLI and the @contentstack/mcp package are MIT",
      "transports": [
        "http",
        "stdio"
      ],
      "remoteUrl": "https://api.contentstack.io",
      "packages": [
        {
          "registry": "npm",
          "name": "@contentstack/mcp"
        },
        {
          "registry": "npm",
          "name": "@contentstack/management"
        },
        {
          "registry": "pypi",
          "name": "contentstack-management"
        }
      ],
      "auth": "mixed",
      "authNotes": "Access is self-serve. Sign up, create a stack, then create a management token in the stack's settings (stack Owner or Admin only) and send it in the `authorization` header with the stack's `api_key`. Management tokens can be read-only or read-write, limited to branches, and given an expiry date. OAuth 2.0 apps are created in Developer Hub, with authorisation code and client credentials grants, scopes per module and action, 60-minute tokens and a refresh grant. A user authtoken from the login endpoint also works. The MCP server uses OAuth through `npx @contentstack/mcp --auth`, or a management token for content tools.",
      "pricing": "freemium",
      "pricingNotes": "Free plan at $0 a month with no card and no expiry (one stack, three users, 100,000 API calls a month, 1,000 entries), so an agent's owner can start without a contract. Build is $29 a month and Growth $299 a month with extra users at $25 each. Enterprise is priced by quote. Build mentions pay-as-you-go overages, and no overage rate is shown on the pricing page (https://www.contentstack.com/pricing, checked 2026-10-07).",
      "priceSummary": "$29 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the API docs, the OpenAPI file, the MCP package or the pricing page (checked 2026-10-07).",
        "endpoints": []
      },
      "toolCount": 206,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 43992,
        "pypiWeekly": 1504,
        "asOf": "2026-10-07"
      },
      "docsUrl": "https://www.contentstack.com/docs/developers/apis/content-management-api",
      "llmsTxt": "https://www.contentstack.com/llms.txt",
      "openapi": "https://github.com/contentstack/contentstack-openapi",
      "capabilities": [
        "cms.content",
        "cms.publish",
        "cms.assets",
        "cms.localisation",
        "cms.schema"
      ],
      "tags": [
        "hosted",
        "official",
        "mcp",
        "openapi",
        "llms-txt",
        "oauth",
        "free-tier",
        "no-card",
        "closed-source",
        "webhooks",
        "typescript",
        "python",
        "java",
        "dotnet",
        "status-page",
        "soc2",
        "sla"
      ],
      "lastRelease": "2026-09-22",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 64,
        "grade": "B",
        "agentReady": false,
        "rank": 367,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 10,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 67,
          "maintenance": 82,
          "payments": 30,
          "reliability": 71,
          "schema": 77,
          "security": 69,
          "transparency": 73
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-07"
        },
        "negative": -3,
        "negativeNotes": [
          "11 September 2026. The `limit` query parameter on delivery and management requests changed behaviour inside v3. `limit=0` used to return every matching record and now returns the default 100, so an integration relying on it gets a truncated result with a 200 status. The changelog entry is dated the same day and gives a migration path, and no earlier notice was found in the changelog feed. Deducted 3, the low end, because it was documented (https://www.contentstack.com/docs/changelog)."
        ],
        "verdict": "The Content Management API has a public OpenAPI file, OAuth scopes that separate read, write and publish, read-only management tokens and a stack audit log. A free plan needs no card. The MCP server loads 78 tools by default with no annotations or read-only switch, and the `limit=0` behaviour changed on 11 September 2026 without advance notice.",
        "bestFor": "Teams already on Contentstack, or starting on its free plan, who want an agent to draft, localise, release and publish structured content with scoped credentials and an audit trail.",
        "strengths": [
          "OAuth 2.0 scopes separate read, write, publish and unpublish for entries and assets, with 60-minute tokens and a refresh grant",
          "Management tokens can be read-only, limited to named branches, given an expiry date and given their own per-second rate limits",
          "Free plan at $0 with no card and no expiry (one stack, three users, 100,000 API calls a month), launched 16 September 2026",
          "Public OpenAPI 3.0.0 file for the Content Management API (138 paths, 221 operations) and public JSON Schema for all 206 MCP tools at mcp.contentstack.com",
          "Stack audit log readable through /v3/audit-logs, and entry and asset version history through the API",
          "Uptime commitment of 99.50 or 99.95 per cent by plan, with service credits, published in the Services Description"
        ],
        "weaknesses": [
          "The MCP server's default group loads 78 tools, including nine deletes, with no readOnlyHint or destructiveHint annotations and no read-only switch",
          "On 11 September 2026 `limit=0` stopped returning every record and now returns the default 100. The changelog entry is dated the same day",
          "The OpenAPI file documents only 200 responses and has no enums or component schemas. Request bodies are shown as examples",
          "No idempotency keys and no Retry-After header were found. The docs name only X-RateLimit-Limit and X-RateLimit-Remaining",
          "No security.txt and no bug bounty were found, and no deprecation policy with a notice period",
          "Nine incidents with customer impact on status.contentstack.com between 9 July and 7 October 2026, each in one or two regions"
        ],
        "agentNotes": [
          "Pick the base URL for the stack's region first. North America on AWS is https://api.contentstack.io, and the other six regions use contentstack.com hosts",
          "Send `api_key` and `authorization` headers on every Content Management API call. Ask for a read-only management token when the task only reads",
          "Page with `limit` (100 at most), `skip` and `include_count=true`. `limit=0` no longer returns everything",
          "Stay under 10 reads and 10 writes a second per organisation, and one bulk request a second. Watch `X-RateLimit-Remaining` and back off on 429",
          "Start the MCP server with `--groups cma` only, and add `cma-extended` when the task needs audit logs or version history. Publishing and deleting need no confirmation"
        ],
        "metrics": {
          "kind": "remote",
          "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": 64
          }
        ],
        "editorialScores": {
          "ergonomics": 67,
          "maintenance": 82,
          "payments": 30,
          "reliability": 71,
          "schema": 77,
          "security": 69,
          "transparency": 59
        },
        "provenanceScore": 87
      },
      "connect": {
        "install": "npx -y @contentstack/mcp",
        "http": "curl \"https://api.contentstack.io/v3/content_types\" \\\n  -H \"api_key: $CONTENTSTACK_API_KEY\" -H \"authorization: $CONTENTSTACK_MANAGEMENT_TOKEN\"",
        "config": {
          "mcpServers": {
            "contentstack": {
              "args": [
                "-y",
                "@contentstack/mcp"
              ],
              "command": "npx",
              "env": {
                "CONTENTSTACK_API_KEY": "\u003cYOUR_STACK_API_KEY\u003e",
                "GROUPS": "cma"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/cms.content",
        "tool": "https://letme.dev/contentstack"
      },
      "area": "business",
      "unitPrices": [
        {
          "item": "Build",
          "unit": "month",
          "usd": 29,
          "note": "3 users, 250,000 API calls a month"
        },
        {
          "item": "Growth",
          "unit": "month",
          "usd": 299,
          "note": "10 users, 1M API calls a month"
        },
        {
          "item": "Growth, each extra user",
          "unit": "seat-month",
          "usd": 25,
          "note": "beyond the 10 included"
        }
      ],
      "provenance": {
        "legalEntity": "Contentstack Inc.",
        "domain": "contentstack.com",
        "domainRegistered": "2011-10-29",
        "domainNote": "The AWS North America API is on api.contentstack.io. The other six regions and the MCP tool definitions are on contentstack.com hosts.",
        "endpointOnVendorDomain": true,
        "terms": "https://www.contentstack.com/legal/terms-of-service",
        "privacy": "https://www.contentstack.com/legal/privacy",
        "statusPage": "https://status.contentstack.com",
        "changelog": "https://www.contentstack.com/docs/changelog",
        "securityTxt": "none",
        "checked": "2026-10-07",
        "notes": [
          "The Master Agreement (last updated 17 July 2026) names Contentstack Inc., a Delaware corporation at 1023 Springdale Rd., Bldg. 14A, Austin, TX 78721. The privacy policy is dated 30 June 2026.",
          "The online Terms of Service carry an effective date of August 2022. Paid subscriptions are governed by the Master Agreement and the Services Description (last updated 28 July 2026).",
          "www.contentstack.com/.well-known/security.txt and /security.txt both return 404. SECURITY.md in Contentstack's GitHub repositories sends reports to security@contentstack.com.",
          "RDAP for contentstack.com gives a registration date of 2011-10-29.",
          "The npm package @contentstack/mcp names github.com/contentstack/mcp as its repository. That repository asked for credentials when we tried to clone it, so it isn't public."
        ],
        "score": 87
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/contentstack.json",
      "live": {
        "slug": "contentstack",
        "probe": {
          "target": "https://api.contentstack.io",
          "method": "get",
          "lastAt": "2026-10-10T02:07:05.797635424Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 571,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 566,
          "p95ms24h": 641,
          "samples24h": 250,
          "samples30d": 365,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 93,
              "ok": 93
            },
            {
              "date": "2026-10-09",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-10",
              "probes": 22,
              "ok": 22
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.contentstack.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-10T02:05:52.369481405Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "@contentstack/management",
            "version": "1.31.2",
            "seenAt": "2026-10-09T16:47:17.845166747Z"
          },
          {
            "registry": "npm",
            "name": "@contentstack/mcp",
            "version": "0.9.0",
            "seenAt": "2026-10-09T16:47:16.809749853Z"
          },
          {
            "registry": "pypi",
            "name": "contentstack-management",
            "version": "1.11.2",
            "released": "2026-08-12",
            "seenAt": "2026-10-09T16:47:19.032936016Z"
          }
        ],
        "githubStars": 8,
        "npmWeekly": 442,
        "pypiWeekly": 1892,
        "securityTxt": {
          "url": "https://contentstack.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-09T15:39:45.567710818Z"
        },
        "llmsTxt": {
          "url": "https://www.contentstack.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-09T14:01:43.64004019Z"
        },
        "pages": [
          {
            "url": "https://www.contentstack.com/docs/changelog",
            "kind": "changelog",
            "status": 404,
            "checkedAt": "2026-10-09T18:49:16.088180839Z",
            "changedAt": "0001-01-01T00:00:00Z"
          },
          {
            "url": "https://www.contentstack.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-09T18:49:23.049754343Z",
            "changedAt": "2026-10-09T18:49:23.049754343Z",
            "fingerprint": "c353276e8add"
          },
          {
            "url": "https://www.contentstack.com/legal/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-09T18:49:18.69433574Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "999e1b8c6308"
          },
          {
            "url": "https://www.contentstack.com/legal/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-09T18:49:20.342069915Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "a9cc98c875af"
          }
        ],
        "updatedAt": "2026-10-10T02:07:05.797635424Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "ButterCMS LLC",
        "b": "Contentstack Inc.",
        "name": "Vendor"
      },
      {
        "a": "https://api.buttercms.com/v2",
        "b": "https://api.contentstack.io",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP, stdio",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under ButterCMS's terms of service. The SDKs and starter projects on GitHub are MIT",
        "b": "Proprietary service under Contentstack's Master Agreement and Terms of Service. The OpenAPI files, the management SDKs, the CLI and the @contentstack/mcp package are MIT",
        "name": "Licence"
      },
      {
        "a": "none",
        "b": "206",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "yes",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2025-09-04",
        "b": "2026-09-22",
        "name": "Last release"
      },
      {
        "a": "no date given",
        "b": "2022-08-01",
        "name": "Terms last updated"
      },
      {
        "a": "2022-08-15",
        "b": "2026-06-30",
        "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": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "6.9k npm/wk",
        "b": "44k npm/wk, 1.5k PyPI/wk",
        "name": "Popularity"
      }
    ],
    "faq": [
      {
        "answer": "Contentstack scores 64 (B) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on reliability.",
        "question": "Which is better for AI agents, ButterCMS or Contentstack?"
      },
      {
        "answer": "ButterCMS needs an API key. Contentstack takes an API key or an OAuth sign-in.",
        "question": "Do ButterCMS and Contentstack need an API key?"
      },
      {
        "answer": "Yes. ButterCMS has a hosted endpoint at https://api.buttercms.com/v2 and Contentstack at https://api.contentstack.io.",
        "question": "Can an agent call ButterCMS and Contentstack without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 83 against 71"
        ],
        "also": null,
        "goodFor": "A team already on a paid ButterCMS plan that wants an agent to draft and publish pages, collection items and blog posts in small volumes.",
        "slug": "buttercms",
        "watchFor": "The Write API is a paid add-on on Advanced ($249 a month) and Professional ($399), capped at 2,000 and 5,000 write calls a month. Its price is not published"
      },
      {
        "aheadOn": [
          "Security \u0026 auth, 69 against 36",
          "Payments \u0026 pricing, 30 against 20",
          "Maintenance \u0026 community, 82 against 27",
          "Transparency \u0026 trust, 73 against 51"
        ],
        "also": [
          "Runs on your own machine"
        ],
        "goodFor": "Teams already on Contentstack, or starting on its free plan, who want an agent to draft, localise, release and publish structured content with scoped credentials and an audit trail.",
        "slug": "contentstack",
        "watchFor": "The MCP server's default group loads 78 tools, including nine deletes, with no readOnlyHint or destructiveHint annotations and no read-only switch"
      }
    ],
    "job": {
      "capability": "cms.content",
      "name": "Content management"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-datocms.json",
        "title": "ButterCMS vs DatoCMS",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-datocms"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-directus.json",
        "title": "ButterCMS vs Directus",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-directus"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-ghost.json",
        "title": "ButterCMS vs Ghost",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-ghost"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-hygraph.json",
        "title": "ButterCMS vs Hygraph",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-hygraph"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-kontent-ai.json",
        "title": "ButterCMS vs Kontent.ai",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-kontent-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-payload.json",
        "title": "ButterCMS vs Payload",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-payload"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-prismic.json",
        "title": "ButterCMS vs Prismic",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-prismic"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-sanity.json",
        "title": "ButterCMS vs Sanity",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-storyblok.json",
        "title": "ButterCMS vs Storyblok",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-storyblok"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-strapi.json",
        "title": "ButterCMS vs Strapi",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-strapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-webflow.json",
        "title": "ButterCMS vs Webflow",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-webflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-wordpress.json",
        "title": "ButterCMS vs WordPress",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-wordpress"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-datocms.json",
        "title": "Contentstack vs DatoCMS",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-datocms"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-directus.json",
        "title": "Contentstack vs Directus",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-directus"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-ghost.json",
        "title": "Contentstack vs Ghost",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-ghost"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-hygraph.json",
        "title": "Contentstack vs Hygraph",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-hygraph"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-kontent-ai.json",
        "title": "Contentstack vs Kontent.ai",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-kontent-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-payload.json",
        "title": "Contentstack vs Payload",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-payload"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-prismic.json",
        "title": "Contentstack vs Prismic",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-prismic"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-sanity.json",
        "title": "Contentstack vs Sanity",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-storyblok.json",
        "title": "Contentstack vs Storyblok",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-storyblok"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-strapi.json",
        "title": "Contentstack vs Strapi",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-strapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-webflow.json",
        "title": "Contentstack vs Webflow",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-webflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/contentstack-vs-wordpress.json",
        "title": "Contentstack vs WordPress",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-wordpress"
      }
    ],
    "scores": [
      {
        "buttercms": 83,
        "by": 12,
        "contentstack": 71,
        "edge": "buttercms",
        "key": "reliability",
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "buttercms": 78,
        "by": 1,
        "contentstack": 77,
        "edge": "buttercms",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "buttercms": 64,
        "by": 3,
        "contentstack": 67,
        "edge": "contentstack",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "buttercms": 36,
        "by": 33,
        "contentstack": 69,
        "edge": "contentstack",
        "key": "security",
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "buttercms": 20,
        "by": 10,
        "contentstack": 30,
        "edge": "contentstack",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "buttercms": 27,
        "by": 55,
        "contentstack": 82,
        "edge": "contentstack",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "buttercms": 51,
        "by": 22,
        "contentstack": 73,
        "edge": "contentstack",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "Contentstack scores 64 (B) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on reliability. Both do content management.",
    "verdicts": {
      "buttercms": "The Read and Write APIs have a public OpenAPI 3.1 file, Markdown docs and a status page with no incident since October 2025. The Write API is a paid add-on from the $249 plan, capped at 2,000 or 5,000 calls a month. Writes answer 202 with no identifier, support rotates tokens, and the terms are an undated website document.",
      "contentstack": "The Content Management API has a public OpenAPI file, OAuth scopes that separate read, write and publish, read-only management tokens and a stack audit log. A free plan needs no card. The MCP server loads 78 tools by default with no annotations or read-only switch, and the `limit=0` behaviour changed on 11 September 2026 without advance notice."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/buttercms-vs-contentstack",
    "json": "https://www.anchorterminal.com/compare/buttercms-vs-contentstack.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/buttercms-vs-contentstack.md",
    "slim": "https://www.anchorterminal.com/compare/buttercms-vs-contentstack.min.md"
  },
  "markdown": "Contentstack scores 64 (B) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on reliability. Both do content management.\n\n- ButterCMS: grade D, 53.3/100, rank #711 of 950. Markdown https://www.anchorterminal.com/tools/buttercms.md · JSON https://www.anchorterminal.com/api/v1/tools/buttercms.json\n- Contentstack: grade B, 64/100, rank #367 of 950. Markdown https://www.anchorterminal.com/tools/contentstack.md · JSON https://www.anchorterminal.com/api/v1/tools/contentstack.json\n- Best headless CMS and website publishing for AI agents: https://www.anchorterminal.com/best/cms/index.md\n- All 91 cms comparisons: https://www.anchorterminal.com/compare/cms/index.md\n\n## Which one, for what\n\n### ButterCMS (D)\n\nGood for: A team already on a paid ButterCMS plan that wants an agent to draft and publish pages, collection items and blog posts in small volumes.\n\nAhead on:\n- Reliability, 83 against 71\n\nWatch for: The Write API is a paid add-on on Advanced ($249 a month) and Professional ($399), capped at 2,000 and 5,000 write calls a month. Its price is not published\n\n### Contentstack (B)\n\nGood for: Teams already on Contentstack, or starting on its free plan, who want an agent to draft, localise, release and publish structured content with scoped credentials and an audit trail.\n\nAhead on:\n- Security \u0026 auth, 69 against 36\n- Payments \u0026 pricing, 30 against 20\n- Maintenance \u0026 community, 82 against 27\n- Transparency \u0026 trust, 73 against 51\n\nAlso in its favour:\n- Runs on your own machine\n\nWatch for: The MCP server's default group loads 78 tools, including nine deletes, with no readOnlyHint or destructiveHint annotations and no read-only switch\n\n\n## Score by category\n\n| Category | Weight | ButterCMS | Contentstack | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 83 | 71 | ButterCMS +12 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 78 | 77 | ButterCMS +1 |\n| Agent ergonomics | 13% (16.2 this run) | 64 | 67 | Contentstack +3 |\n| Security \u0026 auth | 14% (17.5 this run) | 36 | 69 | Contentstack +33 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 30 | Contentstack +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 27 | 82 | Contentstack +55 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 51 | 73 | Contentstack +22 |\n| Negative events | ≤15 | -2 | -3 | |\n| **Total** | | **53.3 · D** | **64 · B** | |\n\n## Facts side by side\n\n| Fact | ButterCMS | Contentstack |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | ButterCMS LLC | Contentstack Inc. |\n| Hosted endpoint | `https://api.buttercms.com/v2` | `https://api.contentstack.io` |\n| Transports | HTTP | HTTP, stdio |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | Proprietary service under ButterCMS's terms of service. The SDKs and starter projects on GitHub are MIT | Proprietary service under Contentstack's Master Agreement and Terms of Service. The OpenAPI files, the management SDKs, the CLI and the @contentstack/mcp package are MIT |\n| Tools exposed | none | 206 |\n| Read-only variant documented | no | yes |\n| llms.txt | yes | yes |\n| Last release | 2025-09-04 | 2026-09-22 |\n| Terms last updated | no date given | 2022-08-01 |\n| Privacy policy last updated | 2022-08-15 | 2026-06-30 |\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 | not found in the text |\n| Terms restrict benchmarking | not found in the text | yes |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Popularity | 6.9k npm/wk | 44k npm/wk, 1.5k PyPI/wk |\n\n## Verdicts\n\n**ButterCMS.** The Read and Write APIs have a public OpenAPI 3.1 file, Markdown docs and a status page with no incident since October 2025. The Write API is a paid add-on from the $249 plan, capped at 2,000 or 5,000 calls a month. Writes answer 202 with no identifier, support rotates tokens, and the terms are an undated website document.\n\n**Contentstack.** The Content Management API has a public OpenAPI file, OAuth scopes that separate read, write and publish, read-only management tokens and a stack audit log. A free plan needs no card. The MCP server loads 78 tools by default with no annotations or read-only switch, and the `limit=0` behaviour changed on 11 September 2026 without advance notice.\n\n## Before you call either\n\n### ButterCMS\n\n1. End every path with a slash. A missing slash returns a 301, and the vendor counts the redirect and the retry as two API calls\n2. Send the write token only as `Authorization: Token \u003ctoken\u003e`. The `auth_token` query parameter works for reads only\n3. On page creation send every field key of the page type, with empty strings for fields left blank\n4. A 202 means queued, not saved. Read the entry back with `preview=1` to confirm, and check a slug exists before retrying a create\n5. Call the REST API directly for writes. The JavaScript SDK 3.0.3 has list, retrieve and search methods only\n\n### Contentstack\n\n1. Pick the base URL for the stack's region first. North America on AWS is https://api.contentstack.io, and the other six regions use contentstack.com hosts\n2. Send `api_key` and `authorization` headers on every Content Management API call. Ask for a read-only management token when the task only reads\n3. Page with `limit` (100 at most), `skip` and `include_count=true`. `limit=0` no longer returns everything\n4. Stay under 10 reads and 10 writes a second per organisation, and one bulk request a second. Watch `X-RateLimit-Remaining` and back off on 429\n5. Start the MCP server with `--groups cma` only, and add `cma-extended` when the task needs audit logs or version history. Publishing and deleting need no confirmation\n\n## Questions\n\n### Which is better for AI agents, ButterCMS or Contentstack?\n\nContentstack scores 64 (B) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on reliability.\n\n### Do ButterCMS and Contentstack need an API key?\n\nButterCMS needs an API key. Contentstack takes an API key or an OAuth sign-in.\n\n### Can an agent call ButterCMS and Contentstack without installing anything?\n\nYes. ButterCMS has a hosted endpoint at https://api.buttercms.com/v2 and Contentstack at https://api.contentstack.io.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/buttercms-vs-contentstack.json, and with the fewest tokens: https://www.anchorterminal.com/compare/buttercms-vs-contentstack.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"buttercms\", \"b\": \"contentstack\"}`. From a terminal: `anchor compare buttercms contentstack`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/buttercms.json and https://www.anchorterminal.com/api/v1/tools/contentstack.json\n\n## Other comparisons with ButterCMS or Contentstack\n\n- [ButterCMS vs DatoCMS](https://www.anchorterminal.com/compare/buttercms-vs-datocms.md)\n- [ButterCMS vs Directus](https://www.anchorterminal.com/compare/buttercms-vs-directus.md)\n- [ButterCMS vs Ghost](https://www.anchorterminal.com/compare/buttercms-vs-ghost.md)\n- [ButterCMS vs Hygraph](https://www.anchorterminal.com/compare/buttercms-vs-hygraph.md)\n- [ButterCMS vs Kontent.ai](https://www.anchorterminal.com/compare/buttercms-vs-kontent-ai.md)\n- [ButterCMS vs Payload](https://www.anchorterminal.com/compare/buttercms-vs-payload.md)\n- [ButterCMS vs Prismic](https://www.anchorterminal.com/compare/buttercms-vs-prismic.md)\n- [ButterCMS vs Sanity](https://www.anchorterminal.com/compare/buttercms-vs-sanity.md)\n- [ButterCMS vs Storyblok](https://www.anchorterminal.com/compare/buttercms-vs-storyblok.md)\n- [ButterCMS vs Strapi](https://www.anchorterminal.com/compare/buttercms-vs-strapi.md)\n- [ButterCMS vs Webflow](https://www.anchorterminal.com/compare/buttercms-vs-webflow.md)\n- [ButterCMS vs WordPress](https://www.anchorterminal.com/compare/buttercms-vs-wordpress.md)\n- [Contentstack vs DatoCMS](https://www.anchorterminal.com/compare/contentstack-vs-datocms.md)\n- [Contentstack vs Directus](https://www.anchorterminal.com/compare/contentstack-vs-directus.md)\n- [Contentstack vs Ghost](https://www.anchorterminal.com/compare/contentstack-vs-ghost.md)\n- [Contentstack vs Hygraph](https://www.anchorterminal.com/compare/contentstack-vs-hygraph.md)\n- [Contentstack vs Kontent.ai](https://www.anchorterminal.com/compare/contentstack-vs-kontent-ai.md)\n- [Contentstack vs Payload](https://www.anchorterminal.com/compare/contentstack-vs-payload.md)\n- [Contentstack vs Prismic](https://www.anchorterminal.com/compare/contentstack-vs-prismic.md)\n- [Contentstack vs Sanity](https://www.anchorterminal.com/compare/contentstack-vs-sanity.md)\n- [Contentstack vs Storyblok](https://www.anchorterminal.com/compare/contentstack-vs-storyblok.md)\n- [Contentstack vs Strapi](https://www.anchorterminal.com/compare/contentstack-vs-strapi.md)\n- [Contentstack vs Webflow](https://www.anchorterminal.com/compare/contentstack-vs-webflow.md)\n- [Contentstack vs WordPress](https://www.anchorterminal.com/compare/contentstack-vs-wordpress.md)\n",
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