{
  "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": "2026-10-10T02:54:50.404343333Z",
          "lastOk": false,
          "lastStatus": 0,
          "lastMs": 0,
          "lastNote": "too many redirects",
          "authRequired": false,
          "uptime24h": 0,
          "uptime30d": 0,
          "p50ms24h": 0,
          "p95ms24h": 0,
          "samples24h": 115,
          "samples30d": 115,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 85,
              "ok": 0
            },
            {
              "date": "2026-10-10",
              "probes": 30,
              "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": "2026-10-10T02:49:58.109542255Z"
        },
        "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": "2026-10-10T02:54:50.404343333Z"
      }
    },
    "answer": "Sanity scores 73.7 (BB) on agent readiness against ButterCMS's 53.3 (D), and leads in 6 of 7 scored categories. ButterCMS leads on reliability.",
    "b": {
      "slug": "sanity",
      "name": "Sanity",
      "vendor": "Sanity US Inc. and Sanity AS",
      "vendorUrl": "https://www.sanity.io",
      "kind": "http-api",
      "category": "cms",
      "summary": "Sanity is a hosted headless CMS. Content is stored as JSON documents in the Content Lake, queried with GROQ and edited in the open-source Sanity Studio. Agents reach it through the HTTP API or the hosted MCP server at mcp.sanity.io.",
      "url": "https://www.anchorterminal.com/tools/sanity",
      "markdownUrl": "https://www.anchorterminal.com/tools/sanity.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/sanity.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/sanity.json",
      "repo": "https://github.com/sanity-io/sanity",
      "license": "Proprietary hosted service under Sanity's terms of service. Sanity Studio, the CLI, `@sanity/client` and the agent toolkit on GitHub are MIT",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.sanity.io",
      "packages": [
        {
          "registry": "npm",
          "name": "@sanity/client"
        },
        {
          "registry": "npm",
          "name": "sanity"
        },
        {
          "registry": "packagist",
          "name": "sanity/sanity-php"
        }
      ],
      "auth": "mixed",
      "authNotes": "Self-serve. The HTTP API takes a Bearer token. Robot tokens are created in sanity.io/manage, with the CLI or through the Access API, carry a role (Viewer and Editor tokens on every plan), last until deleted unless given an expiry, and are shown once. Personal tokens last a year and act as the user. The MCP server at mcp.sanity.io uses OAuth with PKCE and dynamic client registration by default, with one scope named `global` and sessions of about 7 days, or accepts a token in the `Authorization` header. Custom roles that limit a token to a dataset or document type are Enterprise only. No app review or sales approval is needed.",
      "pricing": "freemium",
      "pricingNotes": "Free plan at $0 with no card, 20 seats, 10,000 documents, 250,000 API requests and 1 million API CDN requests a month, and hard caps that answer 402 when reached. Growth is $15 a seat a month with overage billed per unit. Enterprise is priced by sales. New projects get a Growth trial with Free plan quotas. An agent can start on the Free plan once a person has created the account (checked 2026-10-07).",
      "priceSummary": "$15 / seat-mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the documentation (llms-full.txt) or on the pricing page (checked 2026-10-07).",
        "endpoints": []
      },
      "toolCount": 53,
      "popularity": {
        "githubStars": 6352,
        "npmWeekly": 4069926,
        "pypiWeekly": null,
        "asOf": "2026-10-07"
      },
      "docsUrl": "https://www.sanity.io/docs",
      "llmsTxt": "https://www.sanity.io/docs/llms.txt",
      "openapi": "https://www.sanity.io/docs/api/openapi",
      "registryName": "io.sanity.www/mcp",
      "capabilities": [
        "cms.content",
        "cms.publish",
        "cms.assets",
        "cms.schema",
        "cms.localisation"
      ],
      "tags": [
        "hosted",
        "headless-cms",
        "mcp",
        "oauth",
        "openapi",
        "llms-txt",
        "groq",
        "graphql",
        "javascript",
        "php",
        "free-tier",
        "status-page",
        "soc2",
        "open-source-studio"
      ],
      "lastRelease": "2026-10-02",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 73.7,
        "grade": "BB",
        "agentReady": true,
        "rank": 84,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 2,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 74,
          "maintenance": 89,
          "payments": 40,
          "reliability": 77,
          "schema": 87,
          "security": 67,
          "transparency": 87
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-07"
        },
        "negative": 0,
        "verdict": "Sanity publishes 26 OpenAPI specs covering 225 operations, and its hosted MCP server saves edits to drafts or release versions, with publishing as a separate call. The Content Lake does not run schema validation on API writes, and custom roles that limit a token to one dataset or document type are sold only on Enterprise plans.",
        "bestFor": "Teams that model content as structured documents and want an agent to draft, patch and stage changes in releases for a person to publish.",
        "strengths": [
          "26 public OpenAPI specs covering 225 operations at www.sanity.io/docs/api/openapi, plus llms.txt and a Markdown copy of every documentation page",
          "MCP `patch_documents` saves to a draft or release version, never to published content, and `publish_documents` is a separate tool",
          "Mutations and actions accept `dryRun`, a caller-set `transactionId` and `ifRevisionID` for optimistic locking",
          "Free plan with 10,000 documents and 250,000 API requests a month, with Growth overage rates published per unit",
          "MCP server listed in the official MCP registry as io.sanity.www/mcp, with 30 versions published there between 15 July and 2 October 2026"
        ],
        "weaknesses": [
          "Schema validation rules run only in Sanity Studio. The HTTP mutation API accepts a document without checking them",
          "Custom roles scoped to a dataset or document type are an Enterprise feature. Robot tokens on other plans take a built-in role across the project",
          "The MCP OAuth server lists one scope, `global`, and the server documents 53 tools with no toolset or read-only mode",
          "A status incident on 22 July 2026, marked major on api.sanity.io, stayed open for 6 hours 20 minutes with two recurrences",
          "The vulnerability disclosure page says the bug bounty pilot has closed and no rewards are paid"
        ],
        "agentNotes": [
          "Pin a static dated version in every URL, such as `v2025-02-19`. Omitting `apiVersion` in `@sanity/client` falls back to `v1`.",
          "Validate documents against the schema yourself before an HTTP write, or run `sanity documents validate` afterwards. The Content Lake does not enforce schema rules.",
          "Back off on 429 for mutations yourself. `@sanity/client` retries queries five times but never retries mutations. The limit is 25 mutations a second per IP.",
          "Over MCP, call `create_version` before `patch_documents` when editing inside a release, then patch the returned version ID with the same `releaseId`.",
          "Use GROQ projections and slices to size results. MCP query responses are limited to 64 KiB, and a blocked Free project answers 402 with `plan_limit_reached`."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 73.7
          }
        ],
        "editorialScores": {
          "ergonomics": 74,
          "maintenance": 89,
          "payments": 40,
          "reliability": 77,
          "schema": 87,
          "security": 67,
          "transparency": 79
        },
        "provenanceScore": 95
      },
      "connect": {
        "install": "npx sanity@latest mcp configure",
        "http": "curl -H \"Authorization: Bearer \u003ctoken\u003e\" \"https://\u003cproject\u003e.api.sanity.io/v2021-06-07/data/query/production?query=*\"",
        "claudeCode": "claude mcp add Sanity -t http https://mcp.sanity.io --scope user",
        "config": {
          "mcpServers": {
            "Sanity": {
              "type": "http",
              "url": "https://mcp.sanity.io"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/cms.content",
        "tool": "https://letme.dev/sanity"
      },
      "area": "business",
      "unitPrices": [
        {
          "item": "Growth",
          "unit": "seat-month",
          "usd": 15,
          "note": "up to 50 seats"
        },
        {
          "item": "API requests over quota (Growth)",
          "unit": "1k-requests",
          "usd": 0.04,
          "note": "$1 per 25,000, after 250,000 a month included"
        },
        {
          "item": "API CDN requests over quota (Growth)",
          "unit": "1k-requests",
          "usd": 0.004,
          "note": "$1 per 250,000, after 1 million a month included"
        },
        {
          "item": "Bandwidth over quota (Growth)",
          "unit": "gb",
          "usd": 0.3,
          "note": "after 100 GB a month included"
        },
        {
          "item": "Increased quota add-on (Growth)",
          "unit": "month",
          "usd": 299,
          "note": "50,000 documents, 1 million API requests, 5 million API CDN requests"
        },
        {
          "item": "Extra dataset (Growth)",
          "unit": "month",
          "usd": 999,
          "note": "per dataset"
        }
      ],
      "provenance": {
        "legalEntity": "Sanity US Inc. (with Sanity AS)",
        "domain": "sanity.io",
        "domainRegistered": "2015-01-07",
        "endpointOnVendorDomain": true,
        "terms": "https://www.sanity.io/legal/tos",
        "privacy": "https://www.sanity.io/legal/privacy",
        "statusPage": "https://www.sanity-status.com",
        "changelog": "https://www.sanity.io/docs/changelog",
        "securityTxt": "valid",
        "checked": "2026-10-07",
        "notes": [
          "The terms of service dated 12 August 2026 are entered into with Sanity US Inc. The privacy policy dated 4 May 2026 is that of Sanity AS and Sanity US Inc. Growth has its own terms at sanity.io/legal/tos-growth, dated 26 March 2026.",
          "The API answers at https://\u003cprojectId\u003e.api.sanity.io and https://api.sanity.io, and the MCP server at https://mcp.sanity.io.",
          "www.sanity.io/.well-known/security.txt names security@sanity.io and the disclosure policy at sanity.io/responsible-disclosure, and has no Expires field.",
          "status.sanity.io answers with the same Statuspage as www.sanity-status.com.",
          "RDAP for sanity.io gives a registration date of 2015-01-07."
        ],
        "score": 95
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/sanity.json",
      "live": {
        "slug": "sanity",
        "probe": {
          "target": "https://api.sanity.io",
          "method": "get",
          "lastAt": "2026-10-10T02:55:08.881632524Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 35,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 34,
          "p95ms24h": 104,
          "samples24h": 249,
          "samples30d": 373,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 93,
              "ok": 93
            },
            {
              "date": "2026-10-09",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-10",
              "probes": 30,
              "ok": 30
            }
          ]
        },
        "vendorStatus": {
          "page": "https://www.sanity-status.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-10T02:50:46.116380474Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "sanity-io/sanity",
            "version": "v6.18.0",
            "released": "2026-10-06",
            "seenAt": "2026-10-09T17:18:01.094970864Z"
          },
          {
            "registry": "mcp-registry",
            "name": "io.sanity.www/mcp",
            "version": "2.40.0",
            "seenAt": "2026-10-09T02:57:46.004536428Z"
          },
          {
            "registry": "npm",
            "name": "@sanity/client",
            "version": "8.9.0",
            "seenAt": "2026-10-09T17:17:58.877757923Z"
          },
          {
            "registry": "npm",
            "name": "sanity",
            "version": "6.18.0",
            "seenAt": "2026-10-09T17:17:59.706368001Z"
          }
        ],
        "githubStars": 6353,
        "npmWeekly": 3469642,
        "securityTxt": {
          "url": "https://sanity.io/.well-known/security.txt",
          "state": "valid",
          "checkedAt": "2026-10-09T15:40:30.934573809Z"
        },
        "llmsTxt": {
          "url": "https://www.sanity.io/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-09T14:02:44.094942262Z"
        },
        "pages": [
          {
            "url": "https://www.sanity.io/docs/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-09T18:53:46.175932856Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "906020038702"
          },
          {
            "url": "https://www.sanity.io/legal/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-09T18:53:50.020161561Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "f0a780309f28"
          },
          {
            "url": "https://www.sanity.io/legal/tos",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-09T18:53:50.422800098Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "68f22ec5d44d"
          }
        ],
        "updatedAt": "2026-10-10T02:55:08.881632524Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "ButterCMS LLC",
        "b": "Sanity US Inc. and Sanity AS",
        "name": "Vendor"
      },
      {
        "a": "https://api.buttercms.com/v2",
        "b": "https://api.sanity.io",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP, Streamable HTTP",
        "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 hosted service under Sanity's terms of service. Sanity Studio, the CLI, `@sanity/client` and the agent toolkit on GitHub are MIT",
        "name": "Licence"
      },
      {
        "a": "none",
        "b": "53",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "not listed",
        "b": "io.sanity.www/mcp",
        "name": "MCP registry"
      },
      {
        "a": "2025-09-04",
        "b": "2026-10-02",
        "name": "Last release"
      },
      {
        "a": "no date given",
        "b": "no date given",
        "name": "Terms last updated"
      },
      {
        "a": "2022-08-15",
        "b": "no date given",
        "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": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "6.9k npm/wk",
        "b": "6.4k stars, 4.1M npm/wk",
        "name": "Popularity"
      }
    ],
    "faq": [
      {
        "answer": "Sanity scores 73.7 (BB) on agent readiness against ButterCMS's 53.3 (D), and leads in 6 of 7 scored categories. ButterCMS leads on reliability.",
        "question": "Which is better for AI agents, ButterCMS or Sanity?"
      },
      {
        "answer": "ButterCMS needs an API key. Sanity takes an API key or an OAuth sign-in.",
        "question": "Do ButterCMS and Sanity need an API key?"
      },
      {
        "answer": "Yes. ButterCMS has a hosted endpoint at https://api.buttercms.com/v2 and Sanity at https://api.sanity.io.",
        "question": "Can an agent call ButterCMS and Sanity without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 83 against 77"
        ],
        "also": [
          "Free to start without a card"
        ],
        "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": [
          "Schema \u0026 documentation, 87 against 78",
          "Agent ergonomics, 74 against 64",
          "Security \u0026 auth, 67 against 36",
          "Payments \u0026 pricing, 40 against 20",
          "Maintenance \u0026 community, 89 against 27",
          "Transparency \u0026 trust, 87 against 51"
        ],
        "also": [
          "Agent-ready, a grade of BB or better"
        ],
        "goodFor": "Teams that model content as structured documents and want an agent to draft, patch and stage changes in releases for a person to publish.",
        "slug": "sanity",
        "watchFor": "Schema validation rules run only in Sanity Studio. The HTTP mutation API accepts a document without checking them"
      }
    ],
    "job": {
      "capability": "cms.content",
      "name": "Content management"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/buttercms-vs-contentstack.json",
        "title": "ButterCMS vs Contentstack",
        "url": "https://www.anchorterminal.com/compare/buttercms-vs-contentstack"
      },
      {
        "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-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-sanity.json",
        "title": "Contentstack vs Sanity",
        "url": "https://www.anchorterminal.com/compare/contentstack-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/datocms-vs-sanity.json",
        "title": "DatoCMS vs Sanity",
        "url": "https://www.anchorterminal.com/compare/datocms-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/directus-vs-sanity.json",
        "title": "Directus vs Sanity",
        "url": "https://www.anchorterminal.com/compare/directus-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/ghost-vs-sanity.json",
        "title": "Ghost vs Sanity",
        "url": "https://www.anchorterminal.com/compare/ghost-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hygraph-vs-sanity.json",
        "title": "Hygraph vs Sanity",
        "url": "https://www.anchorterminal.com/compare/hygraph-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/kontent-ai-vs-sanity.json",
        "title": "Kontent.ai vs Sanity",
        "url": "https://www.anchorterminal.com/compare/kontent-ai-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/payload-vs-sanity.json",
        "title": "Payload vs Sanity",
        "url": "https://www.anchorterminal.com/compare/payload-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/prismic-vs-sanity.json",
        "title": "Prismic vs Sanity",
        "url": "https://www.anchorterminal.com/compare/prismic-vs-sanity"
      },
      {
        "json": "https://www.anchorterminal.com/compare/sanity-vs-storyblok.json",
        "title": "Sanity vs Storyblok",
        "url": "https://www.anchorterminal.com/compare/sanity-vs-storyblok"
      },
      {
        "json": "https://www.anchorterminal.com/compare/sanity-vs-strapi.json",
        "title": "Sanity vs Strapi",
        "url": "https://www.anchorterminal.com/compare/sanity-vs-strapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/sanity-vs-webflow.json",
        "title": "Sanity vs Webflow",
        "url": "https://www.anchorterminal.com/compare/sanity-vs-webflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/sanity-vs-wordpress.json",
        "title": "Sanity vs WordPress",
        "url": "https://www.anchorterminal.com/compare/sanity-vs-wordpress"
      }
    ],
    "scores": [
      {
        "buttercms": 83,
        "by": 6,
        "edge": "buttercms",
        "key": "reliability",
        "name": "Reliability",
        "sanity": 77,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "buttercms": 78,
        "by": 9,
        "edge": "sanity",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "sanity": 87,
        "weight": 13
      },
      {
        "buttercms": 64,
        "by": 10,
        "edge": "sanity",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "sanity": 74,
        "weight": 13
      },
      {
        "buttercms": 36,
        "by": 31,
        "edge": "sanity",
        "key": "security",
        "name": "Security \u0026 auth",
        "sanity": 67,
        "weight": 14
      },
      {
        "buttercms": 20,
        "by": 20,
        "edge": "sanity",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "sanity": 40,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "buttercms": 27,
        "by": 62,
        "edge": "sanity",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "sanity": 89,
        "weight": 7
      },
      {
        "buttercms": 51,
        "by": 36,
        "edge": "sanity",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "sanity": 87,
        "weight": 7
      }
    ],
    "summary": "Sanity scores 73.7 (BB) on agent readiness against ButterCMS's 53.3 (D), and leads in 6 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.",
      "sanity": "Sanity publishes 26 OpenAPI specs covering 225 operations, and its hosted MCP server saves edits to drafts or release versions, with publishing as a separate call. The Content Lake does not run schema validation on API writes, and custom roles that limit a token to one dataset or document type are sold only on Enterprise plans."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/buttercms-vs-sanity",
    "json": "https://www.anchorterminal.com/compare/buttercms-vs-sanity.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/buttercms-vs-sanity.md",
    "slim": "https://www.anchorterminal.com/compare/buttercms-vs-sanity.min.md"
  },
  "markdown": "Sanity scores 73.7 (BB) on agent readiness against ButterCMS's 53.3 (D), and leads in 6 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- Sanity: grade BB, 73.7/100, rank #84 of 950. Markdown https://www.anchorterminal.com/tools/sanity.md · JSON https://www.anchorterminal.com/api/v1/tools/sanity.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 77\n\nAlso in its favour:\n- Free to start without a card\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### Sanity (BB)\n\nGood for: Teams that model content as structured documents and want an agent to draft, patch and stage changes in releases for a person to publish.\n\nAhead on:\n- Schema \u0026 documentation, 87 against 78\n- Agent ergonomics, 74 against 64\n- Security \u0026 auth, 67 against 36\n- Payments \u0026 pricing, 40 against 20\n- Maintenance \u0026 community, 89 against 27\n- Transparency \u0026 trust, 87 against 51\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n\nWatch for: Schema validation rules run only in Sanity Studio. The HTTP mutation API accepts a document without checking them\n\n\n## Score by category\n\n| Category | Weight | ButterCMS | Sanity | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 83 | 77 | ButterCMS +6 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 78 | 87 | Sanity +9 |\n| Agent ergonomics | 13% (16.2 this run) | 64 | 74 | Sanity +10 |\n| Security \u0026 auth | 14% (17.5 this run) | 36 | 67 | Sanity +31 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 40 | Sanity +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 27 | 89 | Sanity +62 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 51 | 87 | Sanity +36 |\n| Negative events | ≤15 | -2 | 0 | |\n| **Total** | | **53.3 · D** | **73.7 · BB** | |\n\n## Facts side by side\n\n| Fact | ButterCMS | Sanity |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | ButterCMS LLC | Sanity US Inc. and Sanity AS |\n| Hosted endpoint | `https://api.buttercms.com/v2` | `https://api.sanity.io` |\n| Transports | HTTP | HTTP, Streamable HTTP |\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 hosted service under Sanity's terms of service. Sanity Studio, the CLI, `@sanity/client` and the agent toolkit on GitHub are MIT |\n| Tools exposed | none | 53 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | `io.sanity.www/mcp` |\n| Last release | 2025-09-04 | 2026-10-02 |\n| Terms last updated | no date given | no date given |\n| Privacy policy last updated | 2022-08-15 | no date given |\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 | not found in the text |\n| Popularity | 6.9k npm/wk | 6.4k stars, 4.1M npm/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**Sanity.** Sanity publishes 26 OpenAPI specs covering 225 operations, and its hosted MCP server saves edits to drafts or release versions, with publishing as a separate call. The Content Lake does not run schema validation on API writes, and custom roles that limit a token to one dataset or document type are sold only on Enterprise plans.\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### Sanity\n\n1. Pin a static dated version in every URL, such as `v2025-02-19`. Omitting `apiVersion` in `@sanity/client` falls back to `v1`.\n2. Validate documents against the schema yourself before an HTTP write, or run `sanity documents validate` afterwards. The Content Lake does not enforce schema rules.\n3. Back off on 429 for mutations yourself. `@sanity/client` retries queries five times but never retries mutations. The limit is 25 mutations a second per IP.\n4. Over MCP, call `create_version` before `patch_documents` when editing inside a release, then patch the returned version ID with the same `releaseId`.\n5. Use GROQ projections and slices to size results. MCP query responses are limited to 64 KiB, and a blocked Free project answers 402 with `plan_limit_reached`.\n\n## Questions\n\n### Which is better for AI agents, ButterCMS or Sanity?\n\nSanity scores 73.7 (BB) on agent readiness against ButterCMS's 53.3 (D), and leads in 6 of 7 scored categories. ButterCMS leads on reliability.\n\n### Do ButterCMS and Sanity need an API key?\n\nButterCMS needs an API key. Sanity takes an API key or an OAuth sign-in.\n\n### Can an agent call ButterCMS and Sanity without installing anything?\n\nYes. ButterCMS has a hosted endpoint at https://api.buttercms.com/v2 and Sanity at https://api.sanity.io.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/buttercms-vs-sanity.json, and with the fewest tokens: https://www.anchorterminal.com/compare/buttercms-vs-sanity.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"buttercms\", \"b\": \"sanity\"}`. From a terminal: `anchor compare buttercms sanity`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/buttercms.json and https://www.anchorterminal.com/api/v1/tools/sanity.json\n\n## Other comparisons with ButterCMS or Sanity\n\n- [ButterCMS vs Contentstack](https://www.anchorterminal.com/compare/buttercms-vs-contentstack.md)\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 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 Sanity](https://www.anchorterminal.com/compare/contentstack-vs-sanity.md)\n- [DatoCMS vs Sanity](https://www.anchorterminal.com/compare/datocms-vs-sanity.md)\n- [Directus vs Sanity](https://www.anchorterminal.com/compare/directus-vs-sanity.md)\n- [Ghost vs Sanity](https://www.anchorterminal.com/compare/ghost-vs-sanity.md)\n- [Hygraph vs Sanity](https://www.anchorterminal.com/compare/hygraph-vs-sanity.md)\n- [Kontent.ai vs Sanity](https://www.anchorterminal.com/compare/kontent-ai-vs-sanity.md)\n- [Payload vs Sanity](https://www.anchorterminal.com/compare/payload-vs-sanity.md)\n- [Prismic vs Sanity](https://www.anchorterminal.com/compare/prismic-vs-sanity.md)\n- [Sanity vs Storyblok](https://www.anchorterminal.com/compare/sanity-vs-storyblok.md)\n- [Sanity vs Strapi](https://www.anchorterminal.com/compare/sanity-vs-strapi.md)\n- [Sanity vs Webflow](https://www.anchorterminal.com/compare/sanity-vs-webflow.md)\n- [Sanity vs WordPress](https://www.anchorterminal.com/compare/sanity-vs-wordpress.md)\n",
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