{
  "data": {
    "a": {
      "slug": "buffer",
      "name": "Buffer API + MCP",
      "vendor": "Buffer",
      "vendorUrl": "https://buffer.com",
      "kind": "http-api",
      "category": "social-media",
      "summary": "Buffer's GraphQL API, reopened to everyone on 2026-05-27 and free on every plan, with a hosted MCP server (20 tools) and a CLI.",
      "url": "https://www.anchorterminal.com/tools/buffer",
      "markdownUrl": "https://www.anchorterminal.com/tools/buffer.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/buffer.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/buffer.json",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.buffer.com",
      "packages": [
        {
          "registry": "npm",
          "name": "@bufferapp/cli"
        }
      ],
      "auth": "mixed",
      "authNotes": "Personal API key as a Bearer token for your own account (it sees every organisation you belong to, no per-organisation scoping). App Clients acting for other users use OAuth 2.0 authorisation code with PKCE. The hosted MCP takes OAuth in Claude and other clients, or the API key as a Bearer header.",
      "pricing": "freemium",
      "pricingNotes": "API included on every plan. Free $0 (3 channels, 10 scheduled posts a channel, 1 API key, 3,000 requests a month). Essentials $5 a channel a month billed yearly ($60 a year, 3 keys, 7,500 requests). Team $10 a channel a month billed yearly ($120 a year, 5 keys, 15,000 requests). Channels above 10 cost less. 14-day trial on paid plans (https://buffer.com/pricing).",
      "priceSummary": "$5 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 in developer docs, llms-full.txt or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 20,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 687,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://developers.buffer.com",
      "llmsTxt": "https://developers.buffer.com/llms.txt",
      "capabilities": [
        "social.post",
        "social.schedule",
        "social.analytics"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "no-card",
        "mcp",
        "llms-txt",
        "closed-source",
        "typescript"
      ],
      "lastRelease": "2026-09-30",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 62.3,
        "grade": "B",
        "agentReady": false,
        "rank": 220,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 2,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 65,
          "maintenance": 73,
          "payments": 30,
          "reliability": 55,
          "schema": 86,
          "security": 56,
          "transparency": 78
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "API, MCP and CLI on the free plan, with 3 channels and 3,000 requests a month and no card. 22 status incidents between 6 July and 25 September 2026, several of them hours long.",
        "strengths": [
          "API, MCP and CLI on the free plan, with 3 channels and 3,000 requests a month and no card",
          "Hosted MCP with OAuth 2.0, PKCE and 11 scopes, including read-only ones such as posts:read",
          "429 responses carry an exact Retry-After and don't use up quota",
          "Typed GraphQL schema, a schema changelog updated most days and @deprecated annotations with removal dates",
          "Security reporting route with a GPG key and bug rewards"
        ],
        "weaknesses": [
          "22 status incidents between 6 July and 25 September 2026, several of them hours long",
          "Low quotas, 100 requests per 15 minutes and 3,000 to 15,000 a month",
          "No media upload, every file has to sit at a public URL you host",
          "The changelog shows types removed on 2 and 25 September 2026 despite the additive-only promise",
          "No official SDKs, no tool annotations and no idempotency keys"
        ],
        "agentNotes": [
          "Call `{ account { organizations { id } } }` first, then list channels for an organisation before posting",
          "Include `... on MutationError` in every mutation, since errors come back with HTTP 200",
          "On 429, wait Retry-After plus a few seconds of jitter. The 429 itself doesn't cost quota",
          "Pass images and video as public direct URLs, not preview or login-gated links",
          "Use saveToDraft or addToQueue so nothing publishes by accident, because delete_post can't be undone"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 62.3
          }
        ],
        "editorialScores": {
          "ergonomics": 65,
          "maintenance": 73,
          "payments": 30,
          "reliability": 55,
          "schema": 86,
          "security": 56,
          "transparency": 66
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl https://api.buffer.com -H \"Authorization: Bearer $BUFFER_API_KEY\" \\\n  -H \"content-type: application/json\" -d '{\"query\":\"{ account { id organizations { id name } } }\"}'",
        "claudeCode": "claude mcp add --transport http buffer https://mcp.buffer.com/mcp"
      },
      "letme": {
        "capability": "https://letme.dev/social.post",
        "tool": "https://letme.dev/buffer"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Essentials plan",
          "unit": "month",
          "usd": 5,
          "note": "per channel, billed yearly ($60)"
        },
        {
          "item": "Team plan",
          "unit": "month",
          "usd": 10,
          "note": "per channel, billed yearly ($120)"
        }
      ],
      "provenance": {
        "legalEntity": "Buffer, Inc.",
        "domain": "buffer.com",
        "domainRegistered": "1996-10-28",
        "domainNote": "buffer.com was registered in 1996, long before Buffer bought it.",
        "endpointOnVendorDomain": true,
        "terms": "https://buffer.com/legal",
        "privacy": "https://buffer.com/legal#privacy-policy",
        "statusPage": "https://status.buffer.com",
        "changelog": "https://developers.buffer.com/changelog.html",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/buffer.json",
      "live": {
        "slug": "buffer",
        "probe": {
          "target": "https://api.buffer.com",
          "method": "get",
          "lastAt": "2026-10-05T01:43:34.895167295Z",
          "lastOk": true,
          "lastStatus": 401,
          "lastMs": 150,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 151,
          "p95ms24h": 330,
          "samples24h": 272,
          "samples30d": 1122,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 20,
              "ok": 20
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.buffer.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-05T01:46:24.730678581Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "@bufferapp/cli",
            "version": "1.2.2",
            "seenAt": "2026-10-04T16:22:59.742568507Z"
          }
        ],
        "npmWeekly": 705,
        "securityTxt": {
          "url": "https://buffer.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:16:01.700619316Z"
        },
        "llmsTxt": {
          "url": "https://developers.buffer.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:22.763905129Z"
        },
        "domain": {
          "domain": "buffer.com",
          "registered": "1996-10-28",
          "source": "https://rdap.verisign.com/com/v1/domain/buffer.com",
          "checkedAt": "2026-10-04T13:10:35.711858663Z"
        },
        "pages": [
          {
            "url": "https://developers.buffer.com/changelog.html",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:42:43.491663307Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ebe933ae857f"
          },
          {
            "url": "https://developers.buffer.com/guides/post-metrics.md",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-04T15:42:46.233967731Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "3c79f6e8dea0"
          },
          {
            "url": "https://buffer.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:41:40.254633484Z",
            "changedAt": "2026-10-04T15:41:40.254633484Z",
            "fingerprint": "25d192efbf57"
          },
          {
            "url": "https://buffer.com/legal",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:41:37.920953633Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "47e5366a0554"
          }
        ],
        "updatedAt": "2026-10-05T01:46:24.730678581Z"
      }
    },
    "b": {
      "slug": "postiz",
      "name": "Postiz API + MCP",
      "vendor": "Postiz (Gitroom)",
      "vendorUrl": "https://postiz.com",
      "kind": "http-api",
      "category": "social-media",
      "summary": "Open-source social scheduler (AGPL-3.0) for 34 platforms that you can self-host free or use as Postiz Cloud from $29 a month.",
      "url": "https://www.anchorterminal.com/tools/postiz",
      "markdownUrl": "https://www.anchorterminal.com/tools/postiz.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/postiz.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/postiz.json",
      "repo": "https://github.com/gitroomhq/postiz-app",
      "license": "AGPL-3.0",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.postiz.com/public/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "@postiz/node"
        },
        {
          "registry": "npm",
          "name": "postiz"
        }
      ],
      "auth": "mixed",
      "authNotes": "API key sent raw in the Authorization header (no Bearer prefix), or an OAuth app token prefixed pos_. The MCP accepts a Bearer header at /mcp, an OAuth flow at /mcp-oauth, or the key in the URL path at /mcp/{key}. Self-hosted instances need their own developer apps for each network.",
      "pricing": "paid",
      "pricingNotes": "Self-hosting is free under AGPL-3.0, but you register your own developer app with each network. Postiz Cloud has no free plan (7-day trial, card policy not stated). Standard $29 a month or $23 billed yearly (5 channels), Team $39 or $31 (10), Pro $49 or $39 (30), Ultimate $99 or $79 (100). API, CLI, webhooks and MCP on every plan, posts unlimited. The terms make fees non-refundable (https://postiz.com/pricing).",
      "priceSummary": "$29 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 in docs, llms.txt or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 13,
      "popularity": {
        "githubStars": 36531,
        "npmWeekly": 368,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.postiz.com",
      "llmsTxt": "https://docs.postiz.com/llms.txt",
      "openapi": "https://docs.postiz.com/public-api/openapi.json",
      "capabilities": [
        "social.post",
        "social.schedule",
        "social.analytics",
        "social.media-upload"
      ],
      "tags": [
        "hosted",
        "self-hosted",
        "local",
        "open-source",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "webhooks"
      ],
      "lastRelease": "2026-09-22",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 59.5,
        "grade": "C",
        "agentReady": false,
        "rank": 265,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 3,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 65,
          "maintenance": 85,
          "payments": 30,
          "reliability": 53,
          "schema": 88,
          "security": 49,
          "transparency": 83
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -3,
        "negativeNotes": [
          "2026-07-20 and 2026-09-22. Three security fixes in the last 12 months. A path traversal in the self-hosted upload route that could read files outside UPLOAD_DIRECTORY, fixed in commit 7936062 labelled critical, and CVE-2026-94455 (enterprise endpoints accepting other JWT types) and CVE-2026-94456 (non-cryptographic IDs for OAuth secrets and codes), fixed on 22 September. All fixed and the latter two given CVEs, so we deduct less. -3 (https://github.com/gitroomhq/postiz-app/commit/793606226f981706cc0201c8023f0f2b57ce08e4, https://github.com/gitroomhq/postiz-app/commit/9259cf2429e8cc0c88414e88d5e6c783d7ffba63)"
        ],
        "verdict": "AGPL-3.0 and self-hostable with the API and MCP included, 34 platforms. Create-post capped at 90 requests an hour on every Cloud plan.",
        "strengths": [
          "AGPL-3.0 and self-hostable with the API and MCP included, 34 platforms",
          "OpenAPI 3.1 spec with 27 paths, llms.txt and Markdown docs",
          "MCP tools in source carry readOnlyHint, destructiveHint and idempotentHint, with when-not-to-use guidance",
          "v2.24.0 on 22 September 2026, and CVEs assigned and fixed through a published disclosure process",
          "Flat Cloud plans from $29 a month ($23 yearly) with unlimited posts"
        ],
        "weaknesses": [
          "Create-post capped at 90 requests an hour on every Cloud plan",
          "One organisation key with no scopes, and the MCP OAuth grant is always read and write",
          "The docs document the API key in the MCP URL path at /mcp/{key}",
          "No idempotency key and no Retry-After guidance",
          "Self-hosting means your own developer app and review with each network"
        ],
        "agentNotes": [
          "Send the key as the `Authorization` header with no `Bearer` prefix on REST calls",
          "Batch several posts into one create request to stay under 90 an hour",
          "Call integrationSchema (Get Settings) for a channel before scheduling, since each network has its own settings",
          "Use the Bearer header on /mcp rather than /mcp/{key} so the key stays out of logs",
          "Read output.errors on a failed schedule call and retry with the corrected fields"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 59.5
          }
        ],
        "editorialScores": {
          "ergonomics": 65,
          "maintenance": 85,
          "payments": 30,
          "reliability": 53,
          "schema": 88,
          "security": 49,
          "transparency": 75
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl https://api.postiz.com/public/v1/integrations -H \"Authorization: $POSTIZ_API_KEY\"",
        "claudeCode": "claude mcp add --transport http postiz https://mcp.postiz.com/mcp --header \"Authorization: Bearer $POSTIZ_API_KEY\""
      },
      "letme": {
        "capability": "https://letme.dev/social.post",
        "tool": "https://letme.dev/postiz"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Standard plan",
          "unit": "month",
          "usd": 29,
          "note": "5 channels. $278 a year"
        },
        {
          "item": "Team plan",
          "unit": "month",
          "usd": 39,
          "note": "10 channels. $374 a year"
        },
        {
          "item": "Pro plan",
          "unit": "month",
          "usd": 49,
          "note": "30 channels. $470 a year"
        },
        {
          "item": "Ultimate plan",
          "unit": "month",
          "usd": 99,
          "note": "100 channels. $950 a year"
        }
      ],
      "provenance": {
        "legalEntity": "Gitroom Limited",
        "domain": "postiz.com",
        "domainRegistered": "2013-06-24",
        "domainNote": "postiz.com was registered in 2013, well before the project started in 2023.",
        "endpointOnVendorDomain": true,
        "terms": "https://postiz.com/terms-of-service",
        "privacy": "https://postiz.com/privacy-policy",
        "statusPage": "https://status.postiz.com",
        "changelog": "https://github.com/gitroomhq/postiz-app/releases",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Terms name Gitroom Limited (seller of paid plans) and Gitroom LLC together as Postiz"
        ],
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/postiz.json",
      "live": {
        "slug": "postiz",
        "probe": {
          "target": "https://api.postiz.com/public/v1",
          "method": "get",
          "lastAt": "2026-10-05T01:43:43.381899438Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 183,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 182,
          "p95ms24h": 1557,
          "samples24h": 272,
          "samples30d": 1122,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 20,
              "ok": 20
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.postiz.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:24.360723703Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "gitroomhq/postiz-app",
            "version": "v2.25.0",
            "released": "2026-10-02",
            "seenAt": "2026-10-04T16:37:24.653491564Z"
          },
          {
            "registry": "npm",
            "name": "@postiz/node",
            "version": "1.0.8",
            "seenAt": "2026-10-04T16:37:22.426577889Z"
          },
          {
            "registry": "npm",
            "name": "postiz",
            "version": "2.0.16",
            "seenAt": "2026-10-04T16:37:22.944877673Z"
          }
        ],
        "githubStars": 36683,
        "npmWeekly": 248,
        "securityTxt": {
          "url": "https://postiz.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:49.927585936Z"
        },
        "llmsTxt": {
          "url": "https://docs.postiz.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:08.617167833Z"
        },
        "domain": {
          "domain": "postiz.com",
          "registered": "2013-06-24",
          "source": "https://rdap.verisign.com/com/v1/domain/postiz.com",
          "checkedAt": "2026-10-04T13:06:04.948008258Z"
        },
        "pages": [
          {
            "url": "https://postiz.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:46:57.026389938Z",
            "changedAt": "2026-10-02T15:23:11.667972444Z",
            "fingerprint": "b43a89c371d7"
          },
          {
            "url": "https://postiz.com/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:46:59.225598085Z",
            "changedAt": "2026-10-02T15:23:13.868758528Z",
            "fingerprint": "d9718ddb538b"
          },
          {
            "url": "https://postiz.com/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:47:01.202919096Z",
            "changedAt": "2026-10-02T15:23:15.836946156Z",
            "fingerprint": "0b01371bd86b"
          }
        ],
        "updatedAt": "2026-10-05T01:43:43.381899438Z"
      }
    },
    "summary": "Buffer API + MCP has a score of 62.3 (B) against Postiz API + MCP's 59.5 (C). Both do social post. The largest gap is maintenance \u0026 community, 12 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/buffer-vs-postiz",
    "json": "https://www.anchorterminal.com/compare/buffer-vs-postiz.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/buffer-vs-postiz.md",
    "slim": "https://www.anchorterminal.com/compare/buffer-vs-postiz.min.md"
  },
  "markdown": "Buffer API + MCP has a score of 62.3 (B) against Postiz API + MCP's 59.5 (C). Both do social post. The largest gap is maintenance \u0026 community, 12 points.\n\n- Buffer API + MCP: grade B, 62.3/100, rank #220 of 452. Markdown https://www.anchorterminal.com/tools/buffer.md · JSON https://www.anchorterminal.com/api/v1/tools/buffer.json\n- Postiz API + MCP: grade C, 59.5/100, rank #265 of 452. Markdown https://www.anchorterminal.com/tools/postiz.md · JSON https://www.anchorterminal.com/api/v1/tools/postiz.json\n\n## Which one, for what\n\nPick Buffer API + MCP for security \u0026 auth (+7).\n\nPick Postiz API + MCP for maintenance \u0026 community (+12), transparency \u0026 trust (+5).\n\n## Score by category\n\n| Category | Weight | Buffer API + MCP | Postiz API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 55 | 53 | Buffer API + MCP +2 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 86 | 88 | Postiz API + MCP +2 |\n| Agent ergonomics | 13% (16.2 this run) | 65 | 65 | even |\n| Security \u0026 auth | 14% (17.5 this run) | 56 | 49 | Buffer API + MCP +7 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 30 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 73 | 85 | Postiz API + MCP +12 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 78 | 83 | Postiz API + MCP +5 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **62.3 · B** | **59.5 · C** | |\n\n## Facts side by side\n\n| Fact | Buffer API + MCP | Postiz API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Buffer | Postiz (Gitroom) |\n| Hosted endpoint | `https://api.buffer.com` | `https://api.postiz.com/public/v1` |\n| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | none | AGPL-3.0 |\n| Tools exposed | 20 | 13 |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | yes | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | not listed |\n| Last release | 2026-09-30 | 2026-09-22 |\n| Popularity | 687 npm/wk | 37k stars, 368 npm/wk |\n| Agent reviews | 3/5 (2) | 3/5 (2) |\n\n## Verdicts\n\n**Buffer API + MCP.** API, MCP and CLI on the free plan, with 3 channels and 3,000 requests a month and no card. 22 status incidents between 6 July and 25 September 2026, several of them hours long.\n\n**Postiz API + MCP.** AGPL-3.0 and self-hostable with the API and MCP included, 34 platforms. Create-post capped at 90 requests an hour on every Cloud plan.\n\n## Before you call either\n\n### Buffer API + MCP\n\n1. Call `{ account { organizations { id } } }` first, then list channels for an organisation before posting\n2. Include `... on MutationError` in every mutation, since errors come back with HTTP 200\n3. On 429, wait Retry-After plus a few seconds of jitter. The 429 itself doesn't cost quota\n4. Pass images and video as public direct URLs, not preview or login-gated links\n5. Use saveToDraft or addToQueue so nothing publishes by accident, because delete_post can't be undone\n\n### Postiz API + MCP\n\n1. Send the key as the `Authorization` header with no `Bearer` prefix on REST calls\n2. Batch several posts into one create request to stay under 90 an hour\n3. Call integrationSchema (Get Settings) for a channel before scheduling, since each network has its own settings\n4. Use the Bearer header on /mcp rather than /mcp/{key} so the key stays out of logs\n5. Read output.errors on a failed schedule call and retry with the corrected fields\n\n## Other comparisons with Buffer API + MCP or Postiz API + MCP\n\n- [Ayrshare API + MCP vs Buffer API + MCP](https://www.anchorterminal.com/compare/ayrshare-vs-buffer.md)\n- [Ayrshare API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/ayrshare-vs-postiz.md)\n- [Buffer API + MCP vs Zernio (formerly Late) API + MCP](https://www.anchorterminal.com/compare/buffer-vs-late.md)\n- [Buffer API + MCP vs Metricool API + MCP](https://www.anchorterminal.com/compare/buffer-vs-metricool.md)\n- [Buffer API + MCP vs Mixpost API + MCP](https://www.anchorterminal.com/compare/buffer-vs-mixpost.md)\n- [Buffer API + MCP vs OneUp API + MCP](https://www.anchorterminal.com/compare/buffer-vs-oneup.md)\n- [Buffer API + MCP vs Post Bridge API + MCP](https://www.anchorterminal.com/compare/buffer-vs-post-bridge.md)\n- [Buffer API + MCP vs Publer API + MCP](https://www.anchorterminal.com/compare/buffer-vs-publer.md)\n- [Buffer API + MCP vs Upload-Post API + MCP](https://www.anchorterminal.com/compare/buffer-vs-upload-post.md)\n- [Zernio (formerly Late) API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/late-vs-postiz.md)\n- [Metricool API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/metricool-vs-postiz.md)\n- [Mixpost API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/mixpost-vs-postiz.md)\n- [OneUp API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/oneup-vs-postiz.md)\n- [Post Bridge API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/post-bridge-vs-postiz.md)\n- [Postiz API + MCP vs Publer API + MCP](https://www.anchorterminal.com/compare/postiz-vs-publer.md)\n- [Postiz API + MCP vs Upload-Post API + MCP](https://www.anchorterminal.com/compare/postiz-vs-upload-post.md)\n",
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    "description": "Buffer API + MCP has a score of 62.3 (B) against Postiz API + MCP's 59.5 (C). Both do social post. The largest gap is maintenance \u0026 community, 12 points. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "Buffer API + MCP vs Postiz API + MCP for AI agents, B 62.3 vs C 59.5",
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