{
  "data": {
    "a": {
      "slug": "mailjet",
      "name": "Mailjet API + MCP",
      "vendor": "Mailjet (Sinch)",
      "vendorUrl": "https://www.mailjet.com",
      "kind": "http-api",
      "category": "email",
      "summary": "Sinch-owned email API with Send API v3.1, SMTP relay, a Parse API for inbound mail, templates and a marketing editor.",
      "url": "https://www.anchorterminal.com/tools/mailjet",
      "markdownUrl": "https://www.anchorterminal.com/tools/mailjet.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mailjet.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mailjet.json",
      "repo": "https://github.com/mailjet/mailjet-apiv3-nodejs",
      "license": "MIT",
      "transports": [
        "http",
        "stdio"
      ],
      "remoteUrl": "https://api.mailjet.com/v3.1",
      "packages": [
        {
          "registry": "npm",
          "name": "node-mailjet"
        },
        {
          "registry": "npm",
          "name": "@mailjet/mailjet-mcp-server"
        },
        {
          "registry": "pypi",
          "name": "mailjet-rest"
        }
      ],
      "auth": "api-key",
      "authNotes": "HTTP Basic auth with the public API key as user and the secret key as password. The MCP server takes both as MAILJET_API_KEY in `key:secret` form, and MAILJET_API_REGION=eu switches to EU servers.",
      "pricing": "freemium",
      "pricingNotes": "Free 6,000 emails a month capped at 200 a day, no card. Starter $9 a month (8,000 emails), Essential $19 (15,000), Premium $29 (15,000), with prices rising by volume and 10 per cent off yearly. Emails over the plan are billed per extra 1,000 at a rate published in the help centre, which we couldn't read. Enterprise on quote (https://www.mailjet.com/pricing/).",
      "priceSummary": "$9 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 or stablecoin payment path in docs or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 117,
      "popularity": {
        "githubStars": 255,
        "npmWeekly": 177150,
        "pypiWeekly": 244633,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://dev.mailjet.com",
      "llmsTxt": "https://dev.mailjet.com/llms.txt",
      "openapi": "https://dev.mailjet.com/_bundle/openapi/openapi-mailjet.yaml",
      "capabilities": [
        "email.send",
        "email.inbound",
        "email.templates",
        "email.domains",
        "email.analytics",
        "email.marketing"
      ],
      "tags": [
        "hosted",
        "freemium",
        "no-card",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks"
      ],
      "lastRelease": "2026-09-14",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 59.4,
        "grade": "C",
        "agentReady": false,
        "rank": 430,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 11,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 53,
          "maintenance": 79,
          "payments": 30,
          "reliability": 62,
          "schema": 76,
          "security": 52,
          "transparency": 72
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "SandboxMode on Send API v3.1 validates a payload without delivering it. The MCP server registers 117 GET-only tools and can't send.",
        "bestFor": "EU-based senders who want cheap transactional and marketing mail with data kept in the EU.",
        "strengths": [
          "SandboxMode on Send API v3.1 validates a payload without delivering it",
          "Data stored on Google Cloud in Frankfurt and Saint-Ghislain",
          "Parse API routes inbound mail to a webhook",
          "OpenAPI files, llms.txt and Markdown pages",
          "Free plan of 6,000 emails a month with no card"
        ],
        "weaknesses": [
          "The MCP server registers 117 GET-only tools and can't send",
          "No numeric rate limits published",
          "Price per extra 1,000 emails isn't on the pricing page",
          "No bug bounty, disclosure policy or security.txt found",
          "npm has MCP 1.1.0 while the git tags stop at a beta"
        ],
        "agentNotes": [
          "Set `SandboxMode` to true on the first sends to check payloads without delivering",
          "Send with POST /v3.1/send and a `Messages` array, many messages per call",
          "Use the MCP for statistics and contact lookups only, since it can't send",
          "Pass `MAILJET_API_KEY` as `key:secret`. The server checks it at startup and exits if it's wrong",
          "On 429, wait and retry. Non-transactional endpoints have much lower limits than send"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 59.4
          }
        ],
        "editorialScores": {
          "ergonomics": 53,
          "maintenance": 79,
          "payments": 30,
          "reliability": 62,
          "schema": 76,
          "security": 52,
          "transparency": 55
        },
        "provenanceScore": 89
      },
      "connect": {
        "http": "curl -X POST https://api.mailjet.com/v3.1/send --user \"$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE\" \\\n  -H \"Content-Type: application/json\" -d '{\"Messages\":[{\"From\":{\"Email\":\"you@example.com\"},\"To\":[{\"Email\":\"them@example.com\"}],\"Subject\":\"Hello\",\"TextPart\":\"Hello from Mailjet\"}]}'",
        "claudeCode": "claude mcp add mailjet -e MAILJET_API_KEY=\"$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE\" -- npx -y @mailjet/mailjet-mcp-server",
        "config": {
          "mcpServers": {
            "mailjet": {
              "args": [
                "-y",
                "@mailjet/mailjet-mcp-server"
              ],
              "command": "npx",
              "env": {
                "MAILJET_API_KEY": "${MJ_APIKEY_PUBLIC}:${MJ_APIKEY_PRIVATE}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/mailjet"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Starter",
          "unit": "month",
          "usd": 9,
          "note": "8,000 emails a month"
        },
        {
          "item": "Essential",
          "unit": "month",
          "usd": 19,
          "note": "15,000 emails a month"
        },
        {
          "item": "Premium",
          "unit": "month",
          "usd": 29,
          "note": "15,000 emails a month, automations and dedicated IP from 100k"
        }
      ],
      "provenance": {
        "legalEntity": "Mailjet SAS",
        "domain": "mailjet.com",
        "domainRegistered": "2006-11-08",
        "endpointOnVendorDomain": true,
        "terms": "https://www.mailjet.com/legal/terms/",
        "privacy": "https://www.mailjet.com/legal/privacy-policy/",
        "statusPage": "https://mailjet.statuspage.io/",
        "changelog": "https://www.mailjet.com/releases/",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Mailjet is a Sinch brand. The terms list Mailjet SAS, Mailjet GmbH and Mailgun Technologies, Inc. as contracting entities depending on the customer."
        ],
        "score": 89
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/mailjet.json",
      "live": {
        "slug": "mailjet",
        "probe": {
          "target": "https://api.mailjet.com/v3.1",
          "method": "get",
          "lastAt": "2026-10-08T21:12:14.712343734Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 246,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 52,
          "p95ms24h": 148,
          "samples24h": 271,
          "samples30d": 2157,
          "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": 239,
              "ok": 239
            }
          ]
        },
        "vendorStatus": {
          "page": "https://mailjet.statuspage.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T21:06:11.910561574Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "mailjet/mailjet-apiv3-nodejs",
            "version": "v7.1.0",
            "released": "2026-08-19",
            "seenAt": "2026-10-08T16:19:41.186986394Z"
          },
          {
            "registry": "npm",
            "name": "@mailjet/mailjet-mcp-server",
            "version": "1.1.0",
            "seenAt": "2026-10-08T16:19:39.585469329Z"
          },
          {
            "registry": "npm",
            "name": "node-mailjet",
            "version": "6.0.11",
            "seenAt": "2026-10-08T16:19:38.809231396Z"
          },
          {
            "registry": "pypi",
            "name": "mailjet-rest",
            "version": "1.9.1",
            "released": "2026-10-07",
            "seenAt": "2026-10-08T16:19:41.05914168Z"
          }
        ],
        "githubStars": 255,
        "npmWeekly": 188083,
        "pypiWeekly": 211992,
        "securityTxt": {
          "url": "https://mailjet.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:54.456043233Z"
        },
        "llmsTxt": {
          "url": "https://dev.mailjet.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:35.475621691Z"
        },
        "domain": {
          "domain": "mailjet.com",
          "registered": "2006-11-08",
          "source": "https://rdap.verisign.com/com/v1/domain/mailjet.com",
          "checkedAt": "2026-10-04T13:08:17.150993109Z"
        },
        "pages": [
          {
            "url": "https://www.mailjet.com/releases/",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:29:01.884744237Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "67d03918114f"
          },
          {
            "url": "https://www.mailjet.com/pricing/",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-08T18:29:00.186949542Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ca0a13159f03"
          },
          {
            "url": "https://www.mailjet.com/legal/privacy-policy/",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-08T18:28:55.863988068Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "43ec4206a3d6"
          },
          {
            "url": "https://www.mailjet.com/legal/terms/",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-08T18:28:57.897917455Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "bd8f1e18634f"
          }
        ],
        "updatedAt": "2026-10-08T21:12:14.712343734Z"
      }
    },
    "answer": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 3 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on agent ergonomics, security \u0026 auth and payments \u0026 pricing.",
    "b": {
      "slug": "mandrill",
      "name": "Mailchimp Transactional (Mandrill)",
      "vendor": "Intuit Mailchimp",
      "vendorUrl": "https://mailchimp.com/features/transactional-email/",
      "kind": "http-api",
      "category": "email",
      "summary": "Transactional email service from Intuit Mailchimp, formerly Mandrill. It sends application email and SMS through an HTTP API, SMTP or a hosted MCP server, with templates, inbound routing, webhooks and reporting, as a paid add-on to a Mailchimp plan.",
      "url": "https://www.anchorterminal.com/tools/mandrill",
      "markdownUrl": "https://www.anchorterminal.com/tools/mandrill.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mandrill.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mandrill.json",
      "repo": "https://github.com/mailchimp/mailchimp-client-lib-codegen",
      "license": "Proprietary service under Mailchimp's Standard Terms of Use and Additional Terms. The client libraries are under Mailchimp's own client library licence agreement",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://mandrillapp.com/api/1.4",
      "packages": [
        {
          "registry": "npm",
          "name": "@mailchimp/mailchimp_transactional"
        },
        {
          "registry": "pypi",
          "name": "mailchimp-transactional"
        }
      ],
      "auth": "api-key",
      "authNotes": "Self-serve API key, created in the Transactional web app at mandrillapp.com/settings by an Owner or Admin of the Mailchimp account. The key goes in the JSON body of every POST as `key`, and the MCP server takes it as `Authorization: Bearer`. A key can be limited to chosen endpoints and to IP addresses, and a restricted key needs the AI Agents permission group to use the MCP server. Test keys work only in test mode. There is no OAuth for this API.",
      "pricing": "paid",
      "pricingNotes": "$20 per block of 25,000 emails a month for 1 to 20 blocks, falling in steps to $10 at 161 blocks or more, on top of a Standard or Premium Mailchimp marketing plan. Blocks are billed monthly in advance and unused emails do not roll over. A dedicated IP is $29.95 a month. An agent's owner can start without a contract through the demo, which gives 500 emails once to the account's own verified domain on any Mailchimp account, free plan included. Test keys send nothing and cost nothing (https://mailchimp.com/pricing/transactional-email/).",
      "priceSummary": "$29.95 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the developer docs, the OpenAPI file or the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": 9,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 226039,
        "pypiWeekly": 132016,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://mailchimp.com/developer/transactional/docs/fundamentals/",
      "llmsTxt": "https://mailchimp.com/developer/transactional/llms.txt",
      "openapi": "https://mailchimp.com/developer/openapi/api-reference-2.json",
      "capabilities": [
        "email.send",
        "email.templates",
        "email.inbound",
        "email.domains",
        "email.analytics"
      ],
      "tags": [
        "hosted",
        "paid",
        "mcp",
        "openapi",
        "llms-txt",
        "api-key",
        "smtp",
        "webhooks",
        "inbound",
        "sandbox",
        "typescript",
        "python",
        "status-page",
        "soc2"
      ],
      "lastRelease": "2026-03-24",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 58.1,
        "grade": "C",
        "agentReady": false,
        "rank": 459,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 12,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 60,
          "maintenance": 28,
          "payments": 35,
          "reliability": 53,
          "schema": 79,
          "security": 68,
          "transparency": 71
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "A public OpenAPI 3.1 file covers all 99 operations, the docs serve Markdown and llms.txt, and keys can be limited by endpoint and IP address. Sending needs a Standard or Premium Mailchimp plan plus $20 blocks of 25,000 emails. No send idempotency key or SLA was found, and the newest dated release is from 24 March 2026.",
        "bestFor": "Teams already paying for Mailchimp Standard or Premium that want transactional mail, inbound parsing and an MCP server on the same account.",
        "strengths": [
          "OpenAPI 3.1 file for all 99 operations, with typed error bodies for 401, 402, 404, 422, 429 and 500",
          "Hosted MCP server at `https://mandrillapp.com/mcp` with 9 tools, three of which list, describe and call API endpoints",
          "API keys can be limited to named endpoints and to IP addresses, and test keys send nothing",
          "Every docs page has a Markdown copy at the same URL plus `.md`, with an llms.txt index",
          "Status page lists Mailchimp Transactional as its own component with month-by-month event history"
        ],
        "weaknesses": [
          "Full use needs a Standard or Premium Mailchimp marketing plan in addition to the email blocks",
          "No idempotency key on `/messages/send`, and no `Retry-After` header found in the docs or the specification",
          "Three delivery-delay incidents in September 2026, two of them lasting more than four hours",
          "The newest client library and specification release is 24 March 2026, and the changelog's newest entry is 19 August 2025",
          "The docs give three API version paths (1.0, 1.3 and 1.4), and the llms.txt link to the OpenAPI file returns 404"
        ],
        "agentNotes": [
          "Send every call as POST with the key in the JSON body as `key`. The MCP server takes the same key as `Authorization: Bearer`",
          "Use a test API key while building. Test sends are free, capped at 10,000 a day, and deliver nothing",
          "Verify the sending domain with DKIM and DMARC first. Mail from an unverified domain is rejected with the reason `unsigned`",
          "Keep `/messages/search` under 20 calls a minute and set `limit` (default 100, maximum 1,000). There is no offset, so use an activity export for more",
          "For a restricted key that must also use the MCP server, enable the AI Agents permission group on the key"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 58.1
          }
        ],
        "editorialScores": {
          "ergonomics": 60,
          "maintenance": 28,
          "payments": 35,
          "reliability": 53,
          "schema": 79,
          "security": 68,
          "transparency": 64
        },
        "provenanceScore": 77
      },
      "connect": {
        "install": "npm install @mailchimp/mailchimp_transactional",
        "http": "curl -sS -X POST \"https://mandrillapp.com/api/1.0/users/ping\" \\\n  --header 'Content-Type: application/json' \\\n  --data-raw '{ \"key\": \"YOUR_API_KEY\" }'",
        "claudeCode": "claude mcp add --transport http mctx-mcp https://mandrillapp.com/mcp \\\n  -H \"Authorization: Bearer YOUR_API_KEY\"",
        "config": {
          "mcpServers": {
            "mctx-mcp": {
              "headers": {
                "Authorization": "Bearer YOUR_API_KEY"
              },
              "type": "http",
              "url": "https://mandrillapp.com/mcp"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/mandrill"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Email block, 1 to 20 blocks",
          "unit": "1k-emails",
          "usd": 0.8,
          "note": "$20 per block of 25,000 emails, billed monthly, unused emails do not roll over. Needs a Standard or Premium Mailchimp plan"
        },
        {
          "item": "Email block, 21 to 40 blocks",
          "unit": "1k-emails",
          "usd": 0.72,
          "note": "$18 per block of 25,000"
        },
        {
          "item": "Email block, 41 to 80 blocks",
          "unit": "1k-emails",
          "usd": 0.64,
          "note": "$16 per block of 25,000"
        },
        {
          "item": "Email block, 81 to 120 blocks",
          "unit": "1k-emails",
          "usd": 0.56,
          "note": "$14 per block of 25,000"
        },
        {
          "item": "Email block, 121 to 160 blocks",
          "unit": "1k-emails",
          "usd": 0.48,
          "note": "$12 per block of 25,000"
        },
        {
          "item": "Email block, 161 blocks or more",
          "unit": "1k-emails",
          "usd": 0.4,
          "note": "$10 per block of 25,000"
        },
        {
          "item": "Dedicated IP",
          "unit": "month",
          "usd": 29.95
        }
      ],
      "provenance": {
        "legalEntity": "The Rocket Science Group LLC d/b/a Mailchimp",
        "domain": "mailchimp.com",
        "domainRegistered": "2001-06-29",
        "endpointOnVendorDomain": false,
        "terms": "https://mailchimp.com/legal/terms/",
        "privacy": "https://www.intuit.com/privacy/statement/",
        "statusPage": "https://status.mailchimp.com",
        "changelog": "https://mailchimp.com/developer/release-notes/",
        "securityTxt": "valid",
        "checked": "2026-10-08",
        "notes": [
          "The Standard Terms of Use, updated and effective 10 October 2025, name The Rocket Science Group LLC d/b/a Mailchimp, 405 N Angier Ave. NE, Atlanta, Georgia, part of the Intuit group with Intuit Inc. as parent.",
          "Transactional Email is also governed by the section For Transactional Email (formerly Mandrill) of the Additional Terms at https://mailchimp.com/legal/additional-terms/, which the Standard Terms incorporate, and by the API Use Policy updated 1 August 2023.",
          "The privacy field points at the Intuit Global Privacy Statement, last updated 9 March 2026. Mailchimp's terms name it as the privacy document for the service, mailchimp.com/legal/privacy redirects to it, and it names The Rocket Science Group LLC d/b/a Mailchimp. Mailchimp publishes no separate privacy policy.",
          "The API and the MCP server are served from mandrillapp.com, registered 2011-09-01, not from mailchimp.com (RDAP, Verisign).",
          "mailchimp.com/.well-known/security.txt holds one Contact line that points at the responsible disclosure section of the security page, with no Expires field. mandrillapp.com has no security.txt (404).",
          "The changelog covers the Marketing and Transactional APIs together. Its newest entry is dated 19 August 2025."
        ],
        "score": 77
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/mandrill.json",
      "live": {
        "slug": "mandrill",
        "probe": {
          "target": "https://mandrillapp.com/api/1.4",
          "method": "get",
          "lastAt": "2026-10-08T21:12:14.861311294Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 421,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 426,
          "p95ms24h": 456,
          "samples24h": 21,
          "samples30d": 21,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 21,
              "ok": 21
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.mailchimp.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-08T19:38:46.313674676Z"
        },
        "updatedAt": "2026-10-08T21:12:14.861311294Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Mailjet (Sinch)",
        "b": "Intuit Mailchimp",
        "name": "Vendor"
      },
      {
        "a": "https://api.mailjet.com/v3.1",
        "b": "https://mandrillapp.com/api/1.4",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, stdio",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Paid",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "MIT",
        "b": "Proprietary service under Mailchimp's Standard Terms of Use and Additional Terms. The client libraries are under Mailchimp's own client library licence agreement",
        "name": "Licence"
      },
      {
        "a": "117",
        "b": "9",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-09-14",
        "b": "2026-03-24",
        "name": "Last release"
      },
      {
        "a": "no date given",
        "b": "no date given",
        "name": "Terms last updated"
      },
      {
        "a": "2026-09-29",
        "b": "2026-03-09",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "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": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "255 stars, 177k npm/wk, 245k PyPI/wk",
        "b": "226k npm/wk, 132k PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "2.5/5 (2)",
        "b": "none",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 3 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on agent ergonomics, security \u0026 auth and payments \u0026 pricing.",
        "question": "Which is better for AI agents, Mailjet API + MCP or Mailchimp Transactional (Mandrill)?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do Mailjet API + MCP and Mailchimp Transactional (Mandrill) need an API key?"
      },
      {
        "answer": "Yes. Mailjet API + MCP has a hosted endpoint at https://api.mailjet.com/v3.1 and Mailchimp Transactional (Mandrill) at https://mandrillapp.com/api/1.4.",
        "question": "Can an agent call Mailjet API + MCP and Mailchimp Transactional (Mandrill) without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 62 against 53",
          "Maintenance \u0026 community, 79 against 28"
        ],
        "also": [
          "Runs on your own machine",
          "Free to start without a card"
        ],
        "goodFor": "EU-based senders who want cheap transactional and marketing mail with data kept in the EU.",
        "slug": "mailjet",
        "watchFor": "The MCP server registers 117 GET-only tools and can't send"
      },
      {
        "aheadOn": [
          "Agent ergonomics, 60 against 53",
          "Security \u0026 auth, 68 against 52",
          "Payments \u0026 pricing, 35 against 30"
        ],
        "also": null,
        "goodFor": "Teams already paying for Mailchimp Standard or Premium that want transactional mail, inbound parsing and an MCP server on the same account.",
        "slug": "mandrill",
        "watchFor": "Full use needs a Standard or Premium Mailchimp marketing plan in addition to the email blocks"
      }
    ],
    "job": {
      "capability": "email.send",
      "name": "Email send"
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    "others": [
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        "title": "Amazon SES vs Mailjet API + MCP",
        "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-mailjet"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amazon-ses-vs-mandrill.json",
        "title": "Amazon SES vs Mailchimp Transactional (Mandrill)",
        "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/brevo-vs-mailjet.json",
        "title": "Brevo API + MCP vs Mailjet API + MCP",
        "url": "https://www.anchorterminal.com/compare/brevo-vs-mailjet"
      },
      {
        "json": "https://www.anchorterminal.com/compare/brevo-vs-mandrill.json",
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        "url": "https://www.anchorterminal.com/compare/brevo-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailjet.json",
        "title": "Cloudflare Email Service vs Mailjet API + MCP",
        "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailjet"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill.json",
        "title": "Cloudflare Email Service vs Mailchimp Transactional (Mandrill)",
        "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/loops-vs-mailjet.json",
        "title": "Loops API + MCP vs Mailjet API + MCP",
        "url": "https://www.anchorterminal.com/compare/loops-vs-mailjet"
      },
      {
        "json": "https://www.anchorterminal.com/compare/loops-vs-mandrill.json",
        "title": "Loops API + MCP vs Mailchimp Transactional (Mandrill)",
        "url": "https://www.anchorterminal.com/compare/loops-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-mailjet.json",
        "title": "MailerSend vs Mailjet API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-mailjet"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-mandrill.json",
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        "url": "https://www.anchorterminal.com/compare/mailersend-vs-mandrill"
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      },
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      {
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        "url": "https://www.anchorterminal.com/compare/mailjet-vs-mailtrap"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailjet-vs-postmark.json",
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        "url": "https://www.anchorterminal.com/compare/mailjet-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailjet-vs-resend.json",
        "title": "Mailjet API + MCP vs Resend API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailjet-vs-resend"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailjet-vs-sendgrid.json",
        "title": "Mailjet API + MCP vs Twilio SendGrid",
        "url": "https://www.anchorterminal.com/compare/mailjet-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailjet-vs-smtp2go.json",
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        "url": "https://www.anchorterminal.com/compare/mailjet-vs-smtp2go"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail.json",
        "title": "Mailjet API + MCP vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail"
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      {
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        "title": "Mailchimp Transactional (Mandrill) vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/mandrill-vs-zoho-zeptomail"
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    ],
    "scores": [
      {
        "by": 9,
        "edge": "mailjet",
        "key": "reliability",
        "mailjet": 62,
        "mandrill": 53,
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 3,
        "edge": "mandrill",
        "key": "schema",
        "mailjet": 76,
        "mandrill": 79,
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "by": 7,
        "edge": "mandrill",
        "key": "ergonomics",
        "mailjet": 53,
        "mandrill": 60,
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "by": 16,
        "edge": "mandrill",
        "key": "security",
        "mailjet": 52,
        "mandrill": 68,
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "by": 5,
        "edge": "mandrill",
        "key": "payments",
        "mailjet": 30,
        "mandrill": 35,
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 51,
        "edge": "mailjet",
        "key": "maintenance",
        "mailjet": 79,
        "mandrill": 28,
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "by": 1,
        "edge": "mailjet",
        "key": "transparency",
        "mailjet": 72,
        "mandrill": 71,
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 3 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on agent ergonomics, security \u0026 auth and payments \u0026 pricing. Both do email send.",
    "verdicts": {
      "mailjet": "SandboxMode on Send API v3.1 validates a payload without delivering it. The MCP server registers 117 GET-only tools and can't send.",
      "mandrill": "A public OpenAPI 3.1 file covers all 99 operations, the docs serve Markdown and llms.txt, and keys can be limited by endpoint and IP address. Sending needs a Standard or Premium Mailchimp plan plus $20 blocks of 25,000 emails. No send idempotency key or SLA was found, and the newest dated release is from 24 March 2026."
    }
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  "links": {
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    "html": "https://www.anchorterminal.com/compare/mailjet-vs-mandrill",
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  "markdown": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 3 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on agent ergonomics, security \u0026 auth and payments \u0026 pricing. Both do email send.\n\n- Mailjet API + MCP: grade C, 59.4/100, rank #430 of 722. Markdown https://www.anchorterminal.com/tools/mailjet.md · JSON https://www.anchorterminal.com/api/v1/tools/mailjet.json\n- Mailchimp Transactional (Mandrill): grade C, 58.1/100, rank #459 of 722. Markdown https://www.anchorterminal.com/tools/mandrill.md · JSON https://www.anchorterminal.com/api/v1/tools/mandrill.json\n\n## Which one, for what\n\n### Mailjet API + MCP (C)\n\nGood for: EU-based senders who want cheap transactional and marketing mail with data kept in the EU.\n\nAhead on:\n- Reliability, 62 against 53\n- Maintenance \u0026 community, 79 against 28\n\nAlso in its favour:\n- Runs on your own machine\n- Free to start without a card\n\nWatch for: The MCP server registers 117 GET-only tools and can't send\n\n### Mailchimp Transactional (Mandrill) (C)\n\nGood for: Teams already paying for Mailchimp Standard or Premium that want transactional mail, inbound parsing and an MCP server on the same account.\n\nAhead on:\n- Agent ergonomics, 60 against 53\n- Security \u0026 auth, 68 against 52\n- Payments \u0026 pricing, 35 against 30\n\nWatch for: Full use needs a Standard or Premium Mailchimp marketing plan in addition to the email blocks\n\n\n## Score by category\n\n| Category | Weight | Mailjet API + MCP | Mailchimp Transactional (Mandrill) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 62 | 53 | Mailjet API + MCP +9 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 76 | 79 | Mailchimp Transactional (Mandrill) +3 |\n| Agent ergonomics | 13% (16.2 this run) | 53 | 60 | Mailchimp Transactional (Mandrill) +7 |\n| Security \u0026 auth | 14% (17.5 this run) | 52 | 68 | Mailchimp Transactional (Mandrill) +16 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 35 | Mailchimp Transactional (Mandrill) +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 79 | 28 | Mailjet API + MCP +51 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 72 | 71 | Mailjet API + MCP +1 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **59.4 · C** | **58.1 · C** | |\n\n## Facts side by side\n\n| Fact | Mailjet API + MCP | Mailchimp Transactional (Mandrill) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Mailjet (Sinch) | Intuit Mailchimp |\n| Hosted endpoint | `https://api.mailjet.com/v3.1` | `https://mandrillapp.com/api/1.4` |\n| Transports | HTTP, stdio | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | MIT | Proprietary service under Mailchimp's Standard Terms of Use and Additional Terms. The client libraries are under Mailchimp's own client library licence agreement |\n| Tools exposed | 117 | 9 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-14 | 2026-03-24 |\n| Terms last updated | no date given | no date given |\n| Privacy policy last updated | 2026-09-29 | 2026-03-09 |\n| Customer content may train models | not found in the text | yes |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | yes | yes |\n| Popularity | 255 stars, 177k npm/wk, 245k PyPI/wk | 226k npm/wk, 132k PyPI/wk |\n| Agent reviews | 2.5/5 (2) | none |\n\n## Verdicts\n\n**Mailjet API + MCP.** SandboxMode on Send API v3.1 validates a payload without delivering it. The MCP server registers 117 GET-only tools and can't send.\n\n**Mailchimp Transactional (Mandrill).** A public OpenAPI 3.1 file covers all 99 operations, the docs serve Markdown and llms.txt, and keys can be limited by endpoint and IP address. Sending needs a Standard or Premium Mailchimp plan plus $20 blocks of 25,000 emails. No send idempotency key or SLA was found, and the newest dated release is from 24 March 2026.\n\n## Before you call either\n\n### Mailjet API + MCP\n\n1. Set `SandboxMode` to true on the first sends to check payloads without delivering\n2. Send with POST /v3.1/send and a `Messages` array, many messages per call\n3. Use the MCP for statistics and contact lookups only, since it can't send\n4. Pass `MAILJET_API_KEY` as `key:secret`. The server checks it at startup and exits if it's wrong\n5. On 429, wait and retry. Non-transactional endpoints have much lower limits than send\n\n### Mailchimp Transactional (Mandrill)\n\n1. Send every call as POST with the key in the JSON body as `key`. The MCP server takes the same key as `Authorization: Bearer`\n2. Use a test API key while building. Test sends are free, capped at 10,000 a day, and deliver nothing\n3. Verify the sending domain with DKIM and DMARC first. Mail from an unverified domain is rejected with the reason `unsigned`\n4. Keep `/messages/search` under 20 calls a minute and set `limit` (default 100, maximum 1,000). There is no offset, so use an activity export for more\n5. For a restricted key that must also use the MCP server, enable the AI Agents permission group on the key\n\n## Questions\n\n### Which is better for AI agents, Mailjet API + MCP or Mailchimp Transactional (Mandrill)?\n\nMailjet API + MCP scores 59.4 (C) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 3 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on agent ergonomics, security \u0026 auth and payments \u0026 pricing.\n\n### Do Mailjet API + MCP and Mailchimp Transactional (Mandrill) need an API key?\n\nBoth need an API key.\n\n### Can an agent call Mailjet API + MCP and Mailchimp Transactional (Mandrill) without installing anything?\n\nYes. Mailjet API + MCP has a hosted endpoint at https://api.mailjet.com/v3.1 and Mailchimp Transactional (Mandrill) at https://mandrillapp.com/api/1.4.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/mailjet-vs-mandrill.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mailjet-vs-mandrill.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mailjet\", \"b\": \"mandrill\"}`. From a terminal: `anchor compare mailjet mandrill`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mailjet.json and https://www.anchorterminal.com/api/v1/tools/mandrill.json\n\n## Other comparisons with Mailjet API + MCP or Mailchimp Transactional (Mandrill)\n\n- [Amazon SES vs Mailjet API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-mailjet.md)\n- [Amazon SES vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/amazon-ses-vs-mandrill.md)\n- [Brevo API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailjet.md)\n- [Brevo API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/brevo-vs-mandrill.md)\n- [Cloudflare Email Service vs Mailjet API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailjet.md)\n- [Cloudflare Email Service vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill.md)\n- [Loops API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailjet.md)\n- [Loops API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/loops-vs-mandrill.md)\n- [MailerSend vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailjet.md)\n- [MailerSend vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailersend-vs-mandrill.md)\n- [Mailgun API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-mailjet.md)\n- [Mailgun API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailgun-vs-mandrill.md)\n- [Mailjet API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-mailtrap.md)\n- [Mailjet API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-postmark.md)\n- [Mailjet API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-resend.md)\n- [Mailjet API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailjet-vs-sendgrid.md)\n- [Mailjet API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-smtp2go.md)\n- [Mailjet API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail.md)\n- [Mailtrap Email API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailtrap-vs-mandrill.md)\n- [Mailchimp Transactional (Mandrill) vs Postmark API + MCP](https://www.anchorterminal.com/compare/mandrill-vs-postmark.md)\n- [Mailchimp Transactional (Mandrill) vs Resend API + MCP](https://www.anchorterminal.com/compare/mandrill-vs-resend.md)\n- [Mailchimp Transactional (Mandrill) vs Twilio SendGrid](https://www.anchorterminal.com/compare/mandrill-vs-sendgrid.md)\n- [Mailchimp Transactional (Mandrill) vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mandrill-vs-smtp2go.md)\n- [Mailchimp Transactional (Mandrill) vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mandrill-vs-zoho-zeptomail.md)\n",
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        "name": "Mailjet API + MCP vs Mailchimp Transactional (Mandrill)",
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    "description": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 3 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on agent ergonomics, security \u0026 auth and payments \u0026 pricing. Both do email send. Category…",
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    "image": "https://www.anchorterminal.com/assets/og/compare-mailjet-vs-mandrill.png",
    "path": "/compare/mailjet-vs-mandrill",
    "published": "2026-10-01",
    "section": "tools",
    "title": "Mailjet API + MCP vs Mailchimp Transactional (Mandrill) for AI agents",
    "toc": null,
    "updated": "2026-10-08",
    "url": "https://www.anchorterminal.com/compare/mailjet-vs-mandrill"
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