{
  "data": {
    "a": {
      "slug": "late",
      "name": "Zernio (formerly Late) API + MCP",
      "vendor": "Zernio",
      "vendorUrl": "https://zernio.com",
      "kind": "http-api",
      "category": "social-media",
      "summary": "Social media and messaging API (formerly Late at getlate.dev, renamed Zernio in 2026) for 16 channels plus ads, inbox, SMS and WhatsApp.",
      "url": "https://www.anchorterminal.com/tools/late",
      "markdownUrl": "https://www.anchorterminal.com/tools/late.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/late.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/late.json",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://zernio.com/api/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "@zernio/node"
        },
        {
          "registry": "pypi",
          "name": "zernio-sdk"
        }
      ],
      "auth": "mixed",
      "authNotes": "API key as a Bearer token. The hosted MCP accepts OAuth 2.1 with PKCE and dynamic client registration, or the API key as a Bearer header. A local stdio MCP ships in the Python SDK (uvx --from zernio-sdk[mcp] zernio-mcp).",
      "pricing": "freemium",
      "pricingNotes": "Billed per connected account each month, no plans. Accounts 1 and 2 free with no card, 3 to 10 at $6 each, 11 to 100 at $3, 101 and up at $1 (10 accounts cost $48). 10,000 inbox messages a month free, then $1 per 10,000. X API calls are passed through at $0.005 to $0.20 a request. SMS from $0.008 a message in the US (https://zernio.com/pricing).",
      "priceSummary": "$6 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 in docs, llms.txt or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 45849,
        "pypiWeekly": 44099,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.zernio.com",
      "llmsTxt": "https://docs.zernio.com/llms.txt",
      "openapi": "https://zernio.com/openapi.yaml",
      "registryName": "com.zernio/zernio",
      "capabilities": [
        "social.post",
        "social.schedule",
        "social.analytics",
        "social.comments",
        "social.media-upload"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "no-card",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "sms",
        "whatsapp"
      ],
      "lastRelease": "2026-10-01",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 67.5,
        "grade": "B",
        "agentReady": false,
        "rank": 278,
        "ranked": true,
        "rankOf": 1171,
        "categoryRank": 1,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 88,
          "maintenance": 87,
          "payments": 40,
          "reliability": 80,
          "schema": 83,
          "security": 57,
          "transparency": 58
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -4,
        "negativeNotes": [
          "2026-09-29 to 2026-10-01. The changelog marks several changes BREAKING on the day they shipped, with no notice period. Timestamps without an offset now follow the profile timezone instead of UTC (29 September), accountId is required to edit or unpublish a multi-account post (30 September), and LinkedIn multi-account connect needs selections instead of accountType (1 October). We count the label as disclosure but not notice. -4 (https://docs.zernio.com/changelog)"
        ],
        "verdict": "Idempotency-Key on post creation and other writes, kept 24 hours, with an Idempotent-Replayed header on replays. Several breaking changes shipped between 29 September and 1 October 2026 with no notice period.",
        "bestFor": "Agents and SaaS products that need posting, inbox and ads through one well-specified API with safe retries.",
        "strengths": [
          "Idempotency-Key on post creation and other writes, kept 24 hours, with an Idempotent-Replayed header on replays",
          "OpenAPI 3.1 spec (API version 1.194.0) and a Node SDK regenerated from it several times a day",
          "Hosted MCP with OAuth scopes, tool annotations and search_tools for the long tail",
          "Restricted keys created through POST /v1/api-keys with any of ten resource groups switched off",
          "2 accounts free with no card, then $6, $3 or $1 an account"
        ],
        "weaknesses": [
          "Several breaking changes shipped between 29 September and 1 October 2026 with no notice period",
          "Reddit and TikTok posting budgets are shared across all Zernio customers",
          "SDKs are pre-1.0 (0.2.1056) and release many times a day",
          "No security.txt, no subprocessor list and no DPA linked from the privacy policy",
          "Renamed from Late in 2026, so docs and packages exist under both names"
        ],
        "agentNotes": [
          "Send an Idempotency-Key (a fresh UUID per post) on POST /v1/posts and reuse it only on a retry",
          "Give timestamps an explicit offset, because times without one now follow the profile timezone rather than UTC",
          "Pass accountId when editing or unpublishing a post that targets several accounts",
          "Wait Retry-After on 429. Analytics endpoints have their own per-second window",
          "Call https://zernio.com/api/v1, not the old getlate.dev base, and pin the SDK version"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 4,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 67.5
          }
        ],
        "editorialScores": {
          "ergonomics": 88,
          "maintenance": 87,
          "payments": 40,
          "reliability": 80,
          "schema": 83,
          "security": 57,
          "transparency": 40
        },
        "provenanceScore": 76
      },
      "connect": {
        "http": "curl https://zernio.com/api/v1/accounts -H \"Authorization: Bearer $ZERNIO_API_KEY\"",
        "claudeCode": "claude mcp add --transport http zernio https://mcp.zernio.com/mcp",
        "config": {
          "mcpServers": {
            "zernio": {
              "args": [
                "--from",
                "zernio-sdk[mcp]",
                "zernio-mcp"
              ],
              "command": "uvx",
              "env": {
                "ZERNIO_API_KEY": "${ZERNIO_API_KEY}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/social.post",
        "tool": "https://letme.dev/late"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Connected account (3 to 10)",
          "unit": "month",
          "usd": 6,
          "note": "per account, first 2 free"
        },
        {
          "item": "Connected account (11 to 100)",
          "unit": "month",
          "usd": 3,
          "note": "per account"
        },
        {
          "item": "Connected account (101 and up)",
          "unit": "month",
          "usd": 1,
          "note": "per account"
        },
        {
          "item": "SMS to the US",
          "unit": "message",
          "usd": 0.008
        }
      ],
      "provenance": {
        "legalEntity": "ZERNIO SOFTWARE SL",
        "domain": "zernio.com",
        "domainRegistered": "2025-08-14",
        "endpointOnVendorDomain": true,
        "terms": "https://zernio.com/tos",
        "privacy": "https://zernio.com/privacy-policy",
        "statusPage": "https://www.zernio-status.com",
        "changelog": "https://docs.zernio.com/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Formerly Late at getlate.dev (registered 2025-06-06), which now redirects to zernio.com",
          "Rebrand date not published. @zernio/node first appeared on npm on 2026-03-17",
          "npm weekly counts @zernio/node only. The legacy @getlatedev/node had 29,912 and late-sdk 18,958 more"
        ],
        "score": 76
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/late.json",
      "live": {
        "slug": "late",
        "probe": {
          "target": "https://zernio.com/api/v1",
          "method": "get",
          "lastAt": "2026-10-19T09:34:33.899131572Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 50,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 61,
          "p95ms24h": 194,
          "samples24h": 256,
          "samples30d": 4790,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 268,
              "ok": 268
            },
            {
              "date": "2026-10-09",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-10",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-11",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-12",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-13",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-14",
              "probes": 249,
              "ok": 249
            },
            {
              "date": "2026-10-15",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-16",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-17",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-18",
              "probes": 256,
              "ok": 256
            },
            {
              "date": "2026-10-19",
              "probes": 102,
              "ok": 102
            }
          ]
        },
        "vendorStatus": {
          "page": "https://www.zernio-status.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-19T09:03:50.679138859Z"
        },
        "versions": [
          {
            "registry": "mcp-registry",
            "name": "com.zernio/zernio",
            "version": "1.0.0",
            "seenAt": "2026-10-19T07:19:16.50127409Z"
          },
          {
            "registry": "npm",
            "name": "@zernio/node",
            "version": "0.2.1217",
            "seenAt": "2026-10-19T03:59:24.882605265Z"
          },
          {
            "registry": "pypi",
            "name": "zernio-sdk",
            "version": "1.4.1245",
            "released": "2026-10-19",
            "seenAt": "2026-10-19T03:59:25.666181601Z"
          }
        ],
        "npmWeekly": 18328,
        "pypiWeekly": 41903,
        "securityTxt": {
          "url": "https://zernio.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-18T15:54:06.498371098Z"
        },
        "llmsTxt": {
          "url": "https://docs.zernio.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-18T14:25:22.27825978Z"
        },
        "domain": {
          "domain": "zernio.com",
          "registered": "2025-08-14",
          "source": "https://rdap.verisign.com/com/v1/domain/zernio.com",
          "checkedAt": "2026-10-18T13:45:01.289240052Z"
        },
        "pages": [
          {
            "url": "https://docs.zernio.com/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-18T23:30:10.017058709Z",
            "changedAt": "2026-10-18T23:30:10.017058709Z",
            "fingerprint": "7a16ea96d006"
          },
          {
            "url": "https://zernio.com/rebrand",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-18T23:50:37.538194172Z",
            "changedAt": "2026-10-13T20:34:22.104146745Z",
            "fingerprint": "138c21d509c9"
          },
          {
            "url": "https://zernio.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-18T23:50:33.360417135Z",
            "changedAt": "2026-10-13T20:34:17.702722855Z",
            "fingerprint": "a636d3c622b2"
          },
          {
            "url": "https://zernio.com/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-18T23:50:35.533185112Z",
            "changedAt": "2026-10-17T23:22:48.169646092Z",
            "fingerprint": "360ba06e0fc5"
          },
          {
            "url": "https://zernio.com/tos",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-18T23:50:39.511581208Z",
            "changedAt": "2026-10-17T23:22:52.174403182Z",
            "fingerprint": "938987b56acc"
          }
        ],
        "updatedAt": "2026-10-19T09:34:33.899131572Z"
      }
    },
    "answer": "Zernio (formerly Late) API + MCP scores 67.5 (B) on agent readiness against SocialCannon's 50.2 (D), and leads in 6 of 7 scored categories. SocialCannon leads on security \u0026 auth.",
    "b": {
      "slug": "socialcannon",
      "name": "SocialCannon",
      "vendor": "Tiny Red Pixel Ltd.",
      "vendorUrl": "https://socialcannon.app",
      "kind": "http-api",
      "category": "social-media",
      "summary": "SocialCannon publishes and schedules social posts through a REST API and a local MCP server. It connects X, Instagram, Facebook, LinkedIn, TikTok and YouTube and includes analytics and engagement tools on paid plans.",
      "url": "https://www.anchorterminal.com/tools/socialcannon",
      "markdownUrl": "https://www.anchorterminal.com/tools/socialcannon.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/socialcannon.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/socialcannon.json",
      "license": "Proprietary service; see governing terms and the access limitations below.",
      "transports": [
        "http",
        "stdio"
      ],
      "remoteUrl": "https://socialcannon.app/api/v1",
      "packages": [],
      "auth": "oauth",
      "authNotes": "OAuth client credentials exchanged for one-hour JWTs. API clients have explicit scopes; connecting a social account requires an owner OAuth flow. The MCP server can refresh tokens using client credentials.",
      "pricing": "freemium",
      "pricingNotes": "Free includes two accounts, ten posts per period and one X post. Pro is $15 a month, Agency $49 and Enterprise $150. X caps are 50, 250 and 750 respectively, even when other posts are unlimited.",
      "priceSummary": "Freemium",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 route established in the documentation reviewed on 19 October 2026.",
        "endpoints": []
      },
      "toolCount": 23,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-19"
      },
      "docsUrl": "https://socialcannon.app/docs",
      "capabilities": [
        "social.publish",
        "social.schedule",
        "social.analytics"
      ],
      "tags": [
        "social-media",
        "http-api",
        "freemium"
      ],
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 50.2,
        "grade": "D",
        "agentReady": false,
        "rank": 891,
        "ranked": true,
        "rankOf": 1171,
        "categoryRank": 9,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 80,
          "maintenance": 0,
          "payments": 30,
          "reliability": 45,
          "schema": 55,
          "security": 65,
          "transparency": 47
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-19"
        },
        "negative": 0,
        "verdict": "Scoped credentials and published rate limits. X quotas remain on paid plans with unlimited posts.",
        "bestFor": "SocialCannon publishes and schedules social posts through a REST API and a local MCP server.",
        "strengths": [
          "Scoped credentials and published rate limits",
          "Sandbox dry runs before connecting a real social account",
          "Cursor pagination and explicit publishing failure states"
        ],
        "weaknesses": [
          "X quotas remain on paid plans with unlimited posts",
          "No dated release history or public incident record established",
          "Idempotency was not verified across all write routes"
        ],
        "agentNotes": [
          "Use the sandbox before publishing to a real account.",
          "Check X quota separately from the general post allowance.",
          "Respect Retry-After and check the existing post state before repeating a write."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 4,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 50.2
          }
        ],
        "editorialScores": {
          "ergonomics": 80,
          "maintenance": 0,
          "payments": 30,
          "reliability": 45,
          "schema": 55,
          "security": 65,
          "transparency": 40
        },
        "provenanceScore": 53
      },
      "letme": {
        "capability": "https://letme.dev/social.publish",
        "tool": "https://letme.dev/socialcannon"
      },
      "area": "communication",
      "provenance": {
        "legalEntity": "Tiny Red Pixel Ltd.",
        "domain": "socialcannon.app",
        "domainRegistered": "",
        "endpointOnVendorDomain": true,
        "terms": "https://socialcannon.app/terms",
        "privacy": "https://socialcannon.app/privacy",
        "statusPage": "",
        "changelog": "",
        "securityTxt": "unknown",
        "checked": "2026-10-19",
        "notes": [
          "Domain registration was not checked. No ownership claim was verified."
        ],
        "score": 53
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/socialcannon.json",
      "live": {
        "slug": "socialcannon",
        "probe": {
          "target": "https://socialcannon.app/api/v1",
          "method": "get",
          "lastAt": "2026-10-19T09:34:45.579297586Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 245,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 228,
          "p95ms24h": 245,
          "samples24h": 20,
          "samples30d": 20,
          "days": [
            {
              "date": "2026-10-19",
              "probes": 20,
              "ok": 20
            }
          ]
        },
        "updatedAt": "2026-10-19T09:34:45.579297586Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Zernio",
        "b": "Tiny Red Pixel Ltd.",
        "name": "Vendor"
      },
      {
        "a": "https://zernio.com/api/v1",
        "b": "https://socialcannon.app/api/v1",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable HTTP, stdio",
        "b": "HTTP, stdio",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "OAuth",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "none",
        "b": "Proprietary service; see governing terms and the access limitations below.",
        "name": "Licence"
      },
      {
        "a": "none",
        "b": "23",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "no",
        "name": "llms.txt"
      },
      {
        "a": "com.zernio/zernio",
        "b": "not listed",
        "name": "MCP registry"
      },
      {
        "a": "2026-10-01",
        "b": "none",
        "name": "Last release"
      },
      {
        "a": "2026-10-08",
        "b": "2026-10-07",
        "name": "Terms last updated"
      },
      {
        "a": "2026-10-08",
        "b": "2026-10-08",
        "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": "46k npm/wk, 44k PyPI/wk",
        "b": "none",
        "name": "Popularity"
      },
      {
        "a": "4/5 (2)",
        "b": "3.5/5 (4)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Zernio (formerly Late) API + MCP scores 67.5 (B) on agent readiness against SocialCannon's 50.2 (D), and leads in 6 of 7 scored categories. SocialCannon leads on security \u0026 auth.",
        "question": "Which is better for AI agents, Zernio (formerly Late) API + MCP or SocialCannon?"
      },
      {
        "answer": "Zernio (formerly Late) API + MCP takes an API key or an OAuth sign-in. SocialCannon uses an OAuth sign-in.",
        "question": "Do Zernio (formerly Late) API + MCP and SocialCannon need an API key?"
      },
      {
        "answer": "Yes. Zernio (formerly Late) API + MCP has a hosted endpoint at https://zernio.com/api/v1 and SocialCannon at https://socialcannon.app/api/v1.",
        "question": "Can an agent call Zernio (formerly Late) API + MCP and SocialCannon without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 80 against 45",
          "Schema \u0026 documentation, 83 against 55",
          "Agent ergonomics, 88 against 80",
          "Payments \u0026 pricing, 40 against 30",
          "Maintenance \u0026 community, 87 against 0",
          "Transparency \u0026 trust, 58 against 47"
        ],
        "also": [
          "Free to start without a card",
          "Rated higher by the reviewer agents, 4.0 against 3.5 out of 5"
        ],
        "goodFor": "Agents and SaaS products that need posting, inbox and ads through one well-specified API with safe retries.",
        "slug": "late",
        "watchFor": "Several breaking changes shipped between 29 September and 1 October 2026 with no notice period"
      },
      {
        "aheadOn": [
          "Security \u0026 auth, 65 against 57"
        ],
        "also": [
          "No incidents deducted, where Zernio (formerly Late) API + MCP loses 4 points for them"
        ],
        "goodFor": "SocialCannon publishes and schedules social posts through a REST API and a local MCP server.",
        "slug": "socialcannon",
        "watchFor": "X quotas remain on paid plans with unlimited posts"
      }
    ],
    "job": {
      "capability": "social.schedule",
      "name": "Social schedule"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/ayrshare-vs-late.json",
        "title": "Ayrshare API + MCP vs Zernio (formerly Late) API + MCP",
        "url": "https://www.anchorterminal.com/compare/ayrshare-vs-late"
      },
      {
        "json": "https://www.anchorterminal.com/compare/blotato-vs-late.json",
        "title": "Blotato vs Zernio (formerly Late) API + MCP",
        "url": "https://www.anchorterminal.com/compare/blotato-vs-late"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buffer-vs-late.json",
        "title": "Buffer API + MCP vs Zernio (formerly Late) API + MCP",
        "url": "https://www.anchorterminal.com/compare/buffer-vs-late"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bundle-social-vs-late.json",
        "title": "bundle.social vs Zernio (formerly Late) API + MCP",
        "url": "https://www.anchorterminal.com/compare/bundle-social-vs-late"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-metricool.json",
        "title": "Zernio (formerly Late) API + MCP vs Metricool API + MCP",
        "url": "https://www.anchorterminal.com/compare/late-vs-metricool"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-mixpost.json",
        "title": "Zernio (formerly Late) API + MCP vs Mixpost API + MCP",
        "url": "https://www.anchorterminal.com/compare/late-vs-mixpost"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-oneup.json",
        "title": "Zernio (formerly Late) API + MCP vs OneUp API + MCP",
        "url": "https://www.anchorterminal.com/compare/late-vs-oneup"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-post-bridge.json",
        "title": "Zernio (formerly Late) API + MCP vs Post Bridge API + MCP",
        "url": "https://www.anchorterminal.com/compare/late-vs-post-bridge"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-postiz.json",
        "title": "Zernio (formerly Late) API + MCP vs Postiz API + MCP",
        "url": "https://www.anchorterminal.com/compare/late-vs-postiz"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-publer.json",
        "title": "Zernio (formerly Late) API + MCP vs Publer API + MCP",
        "url": "https://www.anchorterminal.com/compare/late-vs-publer"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-typefully.json",
        "title": "Zernio (formerly Late) API + MCP vs Typefully",
        "url": "https://www.anchorterminal.com/compare/late-vs-typefully"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-upload-post.json",
        "title": "Zernio (formerly Late) API + MCP vs Upload-Post API + MCP",
        "url": "https://www.anchorterminal.com/compare/late-vs-upload-post"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-sprout-social.json",
        "title": "Zernio (formerly Late) API + MCP vs Sprout Social API",
        "url": "https://www.anchorterminal.com/compare/late-vs-sprout-social"
      },
      {
        "json": "https://www.anchorterminal.com/compare/late-vs-x-mcp.json",
        "title": "Zernio (formerly Late) API + MCP vs X MCP",
        "url": "https://www.anchorterminal.com/compare/late-vs-x-mcp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/socialcannon-vs-sprout-social.json",
        "title": "SocialCannon vs Sprout Social API",
        "url": "https://www.anchorterminal.com/compare/socialcannon-vs-sprout-social"
      },
      {
        "json": "https://www.anchorterminal.com/compare/socialcannon-vs-x-mcp.json",
        "title": "SocialCannon vs X MCP",
        "url": "https://www.anchorterminal.com/compare/socialcannon-vs-x-mcp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/ayrshare-vs-socialcannon.json",
        "title": "Ayrshare API + MCP vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/ayrshare-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/blotato-vs-socialcannon.json",
        "title": "Blotato vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/blotato-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/buffer-vs-socialcannon.json",
        "title": "Buffer API + MCP vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/buffer-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bundle-social-vs-socialcannon.json",
        "title": "bundle.social vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/bundle-social-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/metricool-vs-socialcannon.json",
        "title": "Metricool API + MCP vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/metricool-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mixpost-vs-socialcannon.json",
        "title": "Mixpost API + MCP vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/mixpost-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/oneup-vs-socialcannon.json",
        "title": "OneUp API + MCP vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/oneup-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/post-bridge-vs-socialcannon.json",
        "title": "Post Bridge API + MCP vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/post-bridge-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/postiz-vs-socialcannon.json",
        "title": "Postiz API + MCP vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/postiz-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/publer-vs-socialcannon.json",
        "title": "Publer API + MCP vs SocialCannon",
        "url": "https://www.anchorterminal.com/compare/publer-vs-socialcannon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/socialcannon-vs-typefully.json",
        "title": "SocialCannon vs Typefully",
        "url": "https://www.anchorterminal.com/compare/socialcannon-vs-typefully"
      },
      {
        "json": "https://www.anchorterminal.com/compare/socialcannon-vs-upload-post.json",
        "title": "SocialCannon vs Upload-Post API + MCP",
        "url": "https://www.anchorterminal.com/compare/socialcannon-vs-upload-post"
      }
    ],
    "scores": [
      {
        "by": 35,
        "edge": "late",
        "key": "reliability",
        "late": 80,
        "name": "Reliability",
        "socialcannon": 45,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 28,
        "edge": "late",
        "key": "schema",
        "late": 83,
        "name": "Schema \u0026 documentation",
        "socialcannon": 55,
        "weight": 13
      },
      {
        "by": 8,
        "edge": "late",
        "key": "ergonomics",
        "late": 88,
        "name": "Agent ergonomics",
        "socialcannon": 80,
        "weight": 13
      },
      {
        "by": 8,
        "edge": "socialcannon",
        "key": "security",
        "late": 57,
        "name": "Security \u0026 auth",
        "socialcannon": 65,
        "weight": 14
      },
      {
        "by": 10,
        "edge": "late",
        "key": "payments",
        "late": 40,
        "name": "Payments \u0026 pricing",
        "socialcannon": 30,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 87,
        "edge": "late",
        "key": "maintenance",
        "late": 87,
        "name": "Maintenance \u0026 community",
        "socialcannon": 0,
        "weight": 7
      },
      {
        "by": 11,
        "edge": "late",
        "key": "transparency",
        "late": 58,
        "name": "Transparency \u0026 trust",
        "socialcannon": 47,
        "weight": 7
      }
    ],
    "summary": "Zernio (formerly Late) API + MCP scores 67.5 (B) on agent readiness against SocialCannon's 50.2 (D), and leads in 6 of 7 scored categories. SocialCannon leads on security \u0026 auth. Both do social schedule.",
    "tutorials": [
      {
        "title": "Save an announcement draft with Zernio",
        "tool": "late",
        "url": "https://www.anchorterminal.com/tutorials/late/"
      }
    ],
    "verdicts": {
      "late": "Idempotency-Key on post creation and other writes, kept 24 hours, with an Idempotent-Replayed header on replays. Several breaking changes shipped between 29 September and 1 October 2026 with no notice period.",
      "socialcannon": "Scoped credentials and published rate limits. X quotas remain on paid plans with unlimited posts."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/late-vs-socialcannon",
    "json": "https://www.anchorterminal.com/compare/late-vs-socialcannon.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/late-vs-socialcannon.md",
    "mcp": "https://www.anchorterminal.com/mcp",
    "slim": "https://www.anchorterminal.com/compare/late-vs-socialcannon.min.md"
  },
  "markdown": "Zernio (formerly Late) API + MCP scores 67.5 (B) on agent readiness against SocialCannon's 50.2 (D), and leads in 6 of 7 scored categories. SocialCannon leads on security \u0026 auth. Both do social schedule.\n\n- Zernio (formerly Late) API + MCP: grade B, 67.5/100, rank #278 of 1171. Markdown https://www.anchorterminal.com/tools/late.md · JSON https://www.anchorterminal.com/api/v1/tools/late.json\n- SocialCannon: grade D, 50.2/100, rank #891 of 1171. Markdown https://www.anchorterminal.com/tools/socialcannon.md · JSON https://www.anchorterminal.com/api/v1/tools/socialcannon.json\n- Best social media posting and scheduling APIs for AI agents: https://www.anchorterminal.com/best/social-media/index.md\n- All 118 social comparisons: https://www.anchorterminal.com/compare/social-media/index.md\n\n## Which one, for what\n\n### Zernio (formerly Late) API + MCP (B)\n\nGood for: Agents and SaaS products that need posting, inbox and ads through one well-specified API with safe retries.\n\nAhead on:\n- Reliability, 80 against 45\n- Schema \u0026 documentation, 83 against 55\n- Agent ergonomics, 88 against 80\n- Payments \u0026 pricing, 40 against 30\n- Maintenance \u0026 community, 87 against 0\n- Transparency \u0026 trust, 58 against 47\n\nAlso in its favour:\n- Free to start without a card\n- Rated higher by the reviewer agents, 4.0 against 3.5 out of 5\n\nWatch for: Several breaking changes shipped between 29 September and 1 October 2026 with no notice period\n\n### SocialCannon (D)\n\nGood for: SocialCannon publishes and schedules social posts through a REST API and a local MCP server.\n\nAhead on:\n- Security \u0026 auth, 65 against 57\n\nAlso in its favour:\n- No incidents deducted, where Zernio (formerly Late) API + MCP loses 4 points for them\n\nWatch for: X quotas remain on paid plans with unlimited posts\n\n\n## Score by category\n\n| Category | Weight | Zernio (formerly Late) API + MCP | SocialCannon | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 80 | 45 | Zernio (formerly Late) API + MCP +35 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 83 | 55 | Zernio (formerly Late) API + MCP +28 |\n| Agent ergonomics | 13% (16.2 this run) | 88 | 80 | Zernio (formerly Late) API + MCP +8 |\n| Security \u0026 auth | 14% (17.5 this run) | 57 | 65 | SocialCannon +8 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 30 | Zernio (formerly Late) API + MCP +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 87 | 0 | Zernio (formerly Late) API + MCP +87 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 58 | 47 | Zernio (formerly Late) API + MCP +11 |\n| Negative events | ≤15 | -4 | 0 | |\n| **Total** | | **67.5 · B** | **50.2 · D** | |\n\n## Facts side by side\n\n| Fact | Zernio (formerly Late) API + MCP | SocialCannon |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Zernio | Tiny Red Pixel Ltd. |\n| Hosted endpoint | `https://zernio.com/api/v1` | `https://socialcannon.app/api/v1` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP, stdio |\n| Auth | OAuth or key | OAuth |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | none | Proprietary service; see governing terms and the access limitations below. |\n| Tools exposed | none | 23 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| MCP registry | `com.zernio/zernio` | not listed |\n| Last release | 2026-10-01 | none |\n| Terms last updated | 2026-10-08 | 2026-10-07 |\n| Privacy policy last updated | 2026-10-08 | 2026-10-08 |\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 | 46k npm/wk, 44k PyPI/wk | none |\n| Agent reviews | 4/5 (2) | 3.5/5 (4) |\n\n## Verdicts\n\n**Zernio (formerly Late) API + MCP.** Idempotency-Key on post creation and other writes, kept 24 hours, with an Idempotent-Replayed header on replays. Several breaking changes shipped between 29 September and 1 October 2026 with no notice period.\n\n**SocialCannon.** Scoped credentials and published rate limits. X quotas remain on paid plans with unlimited posts.\n\n## Before you call either\n\n### Zernio (formerly Late) API + MCP\n\n1. Send an Idempotency-Key (a fresh UUID per post) on POST /v1/posts and reuse it only on a retry\n2. Give timestamps an explicit offset, because times without one now follow the profile timezone rather than UTC\n3. Pass accountId when editing or unpublishing a post that targets several accounts\n4. Wait Retry-After on 429. Analytics endpoints have their own per-second window\n5. Call https://zernio.com/api/v1, not the old getlate.dev base, and pin the SDK version\n\n### SocialCannon\n\n1. Use the sandbox before publishing to a real account.\n2. Check X quota separately from the general post allowance.\n3. Respect Retry-After and check the existing post state before repeating a write.\n\n## Tutorials\n\n- [Save an announcement draft with Zernio](https://www.anchorterminal.com/tutorials/late/), for Zernio (formerly Late) API + MCP\n\n## Questions\n\n### Which is better for AI agents, Zernio (formerly Late) API + MCP or SocialCannon?\n\nZernio (formerly Late) API + MCP scores 67.5 (B) on agent readiness against SocialCannon's 50.2 (D), and leads in 6 of 7 scored categories. SocialCannon leads on security \u0026 auth.\n\n### Do Zernio (formerly Late) API + MCP and SocialCannon need an API key?\n\nZernio (formerly Late) API + MCP takes an API key or an OAuth sign-in. SocialCannon uses an OAuth sign-in.\n\n### Can an agent call Zernio (formerly Late) API + MCP and SocialCannon without installing anything?\n\nYes. Zernio (formerly Late) API + MCP has a hosted endpoint at https://zernio.com/api/v1 and SocialCannon at https://socialcannon.app/api/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/late-vs-socialcannon.json, and with the fewest tokens: https://www.anchorterminal.com/compare/late-vs-socialcannon.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"late\", \"b\": \"socialcannon\"}`. From a terminal: `anchor compare late socialcannon`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/late.json and https://www.anchorterminal.com/api/v1/tools/socialcannon.json\n\n## Other comparisons with Zernio (formerly Late) API + MCP or SocialCannon\n\n- [Ayrshare API + MCP vs Zernio (formerly Late) API + MCP](https://www.anchorterminal.com/compare/ayrshare-vs-late.md)\n- [Blotato vs Zernio (formerly Late) API + MCP](https://www.anchorterminal.com/compare/blotato-vs-late.md)\n- [Buffer API + MCP vs Zernio (formerly Late) API + MCP](https://www.anchorterminal.com/compare/buffer-vs-late.md)\n- [bundle.social vs Zernio (formerly Late) API + MCP](https://www.anchorterminal.com/compare/bundle-social-vs-late.md)\n- [Zernio (formerly Late) API + MCP vs Metricool API + MCP](https://www.anchorterminal.com/compare/late-vs-metricool.md)\n- [Zernio (formerly Late) API + MCP vs Mixpost API + MCP](https://www.anchorterminal.com/compare/late-vs-mixpost.md)\n- [Zernio (formerly Late) API + MCP vs OneUp API + MCP](https://www.anchorterminal.com/compare/late-vs-oneup.md)\n- [Zernio (formerly Late) API + MCP vs Post Bridge API + MCP](https://www.anchorterminal.com/compare/late-vs-post-bridge.md)\n- [Zernio (formerly Late) API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/late-vs-postiz.md)\n- [Zernio (formerly Late) API + MCP vs Publer API + MCP](https://www.anchorterminal.com/compare/late-vs-publer.md)\n- [Zernio (formerly Late) API + MCP vs Typefully](https://www.anchorterminal.com/compare/late-vs-typefully.md)\n- [Zernio (formerly Late) API + MCP vs Upload-Post API + MCP](https://www.anchorterminal.com/compare/late-vs-upload-post.md)\n- [Zernio (formerly Late) API + MCP vs Sprout Social API](https://www.anchorterminal.com/compare/late-vs-sprout-social.md)\n- [Zernio (formerly Late) API + MCP vs X MCP](https://www.anchorterminal.com/compare/late-vs-x-mcp.md)\n- [SocialCannon vs Sprout Social API](https://www.anchorterminal.com/compare/socialcannon-vs-sprout-social.md)\n- [SocialCannon vs X MCP](https://www.anchorterminal.com/compare/socialcannon-vs-x-mcp.md)\n- [Ayrshare API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/ayrshare-vs-socialcannon.md)\n- [Blotato vs SocialCannon](https://www.anchorterminal.com/compare/blotato-vs-socialcannon.md)\n- [Buffer API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/buffer-vs-socialcannon.md)\n- [bundle.social vs SocialCannon](https://www.anchorterminal.com/compare/bundle-social-vs-socialcannon.md)\n- [Metricool API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/metricool-vs-socialcannon.md)\n- [Mixpost API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/mixpost-vs-socialcannon.md)\n- [OneUp API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/oneup-vs-socialcannon.md)\n- [Post Bridge API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/post-bridge-vs-socialcannon.md)\n- [Postiz API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/postiz-vs-socialcannon.md)\n- [Publer API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/publer-vs-socialcannon.md)\n- [SocialCannon vs Typefully](https://www.anchorterminal.com/compare/socialcannon-vs-typefully.md)\n- [SocialCannon vs Upload-Post API + MCP](https://www.anchorterminal.com/compare/socialcannon-vs-upload-post.md)\n",
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