{
  "data": {
    "a": {
      "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": "2026-10-09T01:12:50.763736472Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 427,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 423,
          "p95ms24h": 447,
          "samples24h": 63,
          "samples30d": 63,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 50,
              "ok": 50
            },
            {
              "date": "2026-10-09",
              "probes": 13,
              "ok": 13
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.mailchimp.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-08T19:38:46.313674676Z"
        },
        "updatedAt": "2026-10-09T01:12:50.763736472Z"
      }
    },
    "answer": "Twilio SendGrid scores 63.6 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 4 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on schema \u0026 documentation and payments \u0026 pricing.",
    "b": {
      "slug": "sendgrid",
      "name": "Twilio SendGrid",
      "vendor": "Twilio",
      "vendorUrl": "https://sendgrid.com",
      "kind": "http-api",
      "category": "email",
      "summary": "Email API v3 for transactional mail, with Inbound Parse, dynamic templates, suppressions and Marketing Campaigns.",
      "url": "https://www.anchorterminal.com/tools/sendgrid",
      "markdownUrl": "https://www.anchorterminal.com/tools/sendgrid.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/sendgrid.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/sendgrid.json",
      "repo": "https://github.com/sendgrid/sendgrid-nodejs",
      "license": "MIT",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.sendgrid.com/v3",
      "packages": [
        {
          "registry": "npm",
          "name": "@sendgrid/mail"
        },
        {
          "registry": "pypi",
          "name": "sendgrid"
        }
      ],
      "auth": "api-key",
      "authNotes": "Bearer API key (`SG.`) with full, restricted or billing access and per-scope permissions. Subusers get their own keys.",
      "pricing": "paid",
      "pricingNotes": "Free trial of 100 emails a day for 60 days, no card. Essentials $19.95 a month for 50,000 emails or $34.95 for 100,000. Pro $89.95 for 100,000, $249 for 300,000 and $499 for 700,000, with a dedicated IP and 2,500 validations. Premier is custom. Overage rates aren't listed on the pricing page (https://www.twilio.com/en-us/products/email-api/pricing).",
      "priceSummary": "$19.95 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in docs, pricing or MCP README (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 3052,
        "npmWeekly": 5457252,
        "pypiWeekly": 4577455,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://www.twilio.com/docs/sendgrid",
      "llmsTxt": "https://www.twilio.com/docs/llms.txt",
      "openapi": "https://raw.githubusercontent.com/twilio/sendgrid-oai/main/spec/json/tsg_mail_v3.json",
      "capabilities": [
        "email.send",
        "email.inbound",
        "email.templates",
        "email.domains",
        "email.analytics",
        "email.marketing"
      ],
      "tags": [
        "hosted",
        "no-card",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "enterprise"
      ],
      "lastRelease": "2025-09-19",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 63.6,
        "grade": "B",
        "agentReady": false,
        "rank": 305,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 8,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 60,
          "maintenance": 47,
          "payments": 30,
          "reliability": 66,
          "schema": 72,
          "security": 81,
          "transparency": 79
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Restricted API keys with per-endpoint scopes, subuser keys and IP access management. No official MCP server that can send, only Twilio's docs search.",
        "bestFor": "Teams already on Twilio, or that want Marketing Campaigns, subusers and fine-grained keys in one account.",
        "strengths": [
          "Restricted API keys with per-endpoint scopes, subuser keys and IP access management",
          "OpenAPI 3.1 specs for the whole v3 API",
          "Inbound Parse and Marketing Campaigns in one account",
          "Twilio SOC 2 Type II, ISO 27001 and a HackerOne bug bounty",
          "Subprocessors listed with locations, updated September 2026"
        ],
        "weaknesses": [
          "No official MCP server that can send, only Twilio's docs search",
          "Node and Python SDKs last released on 19 September 2025, Go on 29 May 2025",
          "Free plan is a 60-day trial, not a standing free tier",
          "Overage rates and numeric rate limits aren't published",
          "No idempotency key on mail/send"
        ],
        "agentNotes": [
          "Give an agent that only sends a restricted key with just `mail.send`",
          "Set `mail_settings.sandbox_mode` to validate payloads without delivery",
          "Authenticate a domain or verify a single sender before the first send",
          "Read X-RateLimit-Remaining and X-RateLimit-Reset and wait for the reset on 429",
          "Don't blindly retry a timed-out mail/send. There's no idempotency key, so the message can go out twice"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 63.6
          }
        ],
        "editorialScores": {
          "ergonomics": 60,
          "maintenance": 47,
          "payments": 30,
          "reliability": 66,
          "schema": 72,
          "security": 81,
          "transparency": 68
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl -X POST https://api.sendgrid.com/v3/mail/send -H \"Authorization: Bearer $SENDGRID_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"personalizations\":[{\"to\":[{\"email\":\"to@example.com\"}]}],\"from\":{\"email\":\"from@example.com\"},\"subject\":\"Hello\",\"content\":[{\"type\":\"text/plain\",\"value\":\"Hello\"}]}'"
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/sendgrid"
      },
      "sameCompany": [
        "twilio-voice",
        "stytch-connected-apps",
        "twilio"
      ],
      "area": "communication",
      "unitPrices": [
        {
          "item": "Essentials 50k",
          "unit": "month",
          "usd": 19.95,
          "note": "50,000 emails"
        },
        {
          "item": "Essentials 100k",
          "unit": "month",
          "usd": 34.95,
          "note": "100,000 emails"
        },
        {
          "item": "Pro 100k",
          "unit": "month",
          "usd": 89.95,
          "note": "100,000 emails, 1 dedicated IP"
        },
        {
          "item": "Pro 300k",
          "unit": "month",
          "usd": 249,
          "note": "300,000 emails"
        },
        {
          "item": "Pro 700k",
          "unit": "month",
          "usd": 499,
          "note": "700,000 emails"
        }
      ],
      "provenance": {
        "legalEntity": "Twilio Inc.",
        "domain": "sendgrid.com",
        "domainRegistered": "2009-04-20",
        "endpointOnVendorDomain": true,
        "terms": "https://www.twilio.com/en-us/legal/tos",
        "privacy": "https://www.twilio.com/en-us/legal/privacy",
        "statusPage": "https://status.twilio.com",
        "changelog": "https://www.twilio.com/en-us/changelog",
        "securityTxt": "unknown",
        "checked": "2026-09-30",
        "notes": [
          "sendgrid.com returns 403 for /.well-known/security.txt, and sendgrid.com pricing now redirects to twilio.com."
        ],
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/sendgrid.json",
      "live": {
        "slug": "sendgrid",
        "probe": {
          "target": "https://api.sendgrid.com/v3",
          "method": "get",
          "lastAt": "2026-10-09T01:12:56.75585648Z",
          "lastOk": true,
          "lastStatus": 401,
          "lastMs": 138,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 157,
          "p95ms24h": 190,
          "samples24h": 267,
          "samples30d": 2199,
          "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": 13,
              "ok": 13
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.twilio.com",
          "indicator": "minor",
          "summary": "Partially Degraded Service",
          "checkedAt": "2026-10-09T01:07:51.19405354Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "sendgrid/sendgrid-nodejs",
            "version": "8.1.6",
            "released": "2025-09-19",
            "seenAt": "2026-10-08T16:28:49.3558642Z"
          },
          {
            "registry": "npm",
            "name": "@sendgrid/mail",
            "version": "8.1.6",
            "seenAt": "2026-10-08T16:28:48.44008455Z"
          },
          {
            "registry": "pypi",
            "name": "sendgrid",
            "version": "6.12.5",
            "released": "2025-09-19",
            "seenAt": "2026-10-08T16:28:49.242685263Z"
          }
        ],
        "githubStars": 3052,
        "npmWeekly": 5744754,
        "pypiWeekly": 4996856,
        "securityTxt": {
          "url": "https://sendgrid.com/.well-known/security.txt",
          "state": "unknown",
          "checkedAt": "2026-10-08T15:38:35.229818646Z"
        },
        "llmsTxt": {
          "url": "https://www.twilio.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:52.040188642Z"
        },
        "domain": {
          "domain": "sendgrid.com",
          "registered": "2009-04-20",
          "source": "https://rdap.verisign.com/com/v1/domain/sendgrid.com",
          "checkedAt": "2026-10-04T13:05:08.539043451Z"
        },
        "pages": [
          {
            "url": "https://www.twilio.com/en-us/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:31:05.564395484Z",
            "changedAt": "2026-10-07T18:14:10.937244949Z",
            "fingerprint": "51737322225d"
          },
          {
            "url": "https://www.twilio.com/en-us/products/email-api/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:31:12.205867613Z",
            "changedAt": "2026-10-03T15:40:29.339427666Z",
            "fingerprint": "d7367bb506a5"
          },
          {
            "url": "https://www.twilio.com/en-us/legal/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:31:08.120395446Z",
            "changedAt": "2026-10-08T18:31:08.120395446Z",
            "fingerprint": "6da0cfe3eb8e"
          },
          {
            "url": "https://www.twilio.com/en-us/legal/tos",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:31:10.230391682Z",
            "changedAt": "2026-10-03T15:40:27.263475456Z",
            "fingerprint": "2a9a14fa11bf"
          }
        ],
        "updatedAt": "2026-10-09T01:12:56.75585648Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Intuit Mailchimp",
        "b": "Twilio",
        "name": "Vendor"
      },
      {
        "a": "https://mandrillapp.com/api/1.4",
        "b": "https://api.sendgrid.com/v3",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Paid",
        "b": "Paid",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under Mailchimp's Standard Terms of Use and Additional Terms. The client libraries are under Mailchimp's own client library licence agreement",
        "b": "MIT",
        "name": "Licence"
      },
      {
        "a": "9",
        "b": "none",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-03-24",
        "b": "2025-09-19",
        "name": "Last release"
      },
      {
        "a": "no date given",
        "b": "2026-07-16",
        "name": "Terms last updated"
      },
      {
        "a": "2026-03-09",
        "b": "2026-04-09",
        "name": "Privacy policy last updated"
      },
      {
        "a": "yes",
        "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": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "226k npm/wk, 132k PyPI/wk",
        "b": "3.1k stars, 5.5M npm/wk, 4.6M PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "2.5/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Twilio SendGrid scores 63.6 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 4 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on schema \u0026 documentation and payments \u0026 pricing.",
        "question": "Which is better for AI agents, Mailchimp Transactional (Mandrill) or Twilio SendGrid?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do Mailchimp Transactional (Mandrill) and Twilio SendGrid need an API key?"
      },
      {
        "answer": "Yes. Mailchimp Transactional (Mandrill) has a hosted endpoint at https://mandrillapp.com/api/1.4 and Twilio SendGrid at https://api.sendgrid.com/v3.",
        "question": "Can an agent call Mailchimp Transactional (Mandrill) and Twilio SendGrid without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Schema \u0026 documentation, 79 against 72",
          "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"
      },
      {
        "aheadOn": [
          "Reliability, 66 against 53",
          "Security \u0026 auth, 81 against 68",
          "Maintenance \u0026 community, 47 against 28",
          "Transparency \u0026 trust, 79 against 71"
        ],
        "also": [
          "Free to start without a card"
        ],
        "goodFor": "Teams already on Twilio, or that want Marketing Campaigns, subusers and fine-grained keys in one account.",
        "slug": "sendgrid",
        "watchFor": "No official MCP server that can send, only Twilio's docs search"
      }
    ],
    "job": {
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    "others": [
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        "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/amazon-ses-vs-sendgrid.json",
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        "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-sendgrid"
      },
      {
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      },
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        "json": "https://www.anchorterminal.com/compare/brevo-vs-sendgrid.json",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill.json",
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        "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-sendgrid.json",
        "title": "Cloudflare Email Service vs Twilio SendGrid",
        "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/loops-vs-mandrill.json",
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        "url": "https://www.anchorterminal.com/compare/loops-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/loops-vs-sendgrid.json",
        "title": "Loops API + MCP vs Twilio SendGrid",
        "url": "https://www.anchorterminal.com/compare/loops-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-mandrill.json",
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        "url": "https://www.anchorterminal.com/compare/mailersend-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-sendgrid.json",
        "title": "MailerSend vs Twilio SendGrid",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailgun-vs-mandrill.json",
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        "url": "https://www.anchorterminal.com/compare/mailgun-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailgun-vs-sendgrid.json",
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        "url": "https://www.anchorterminal.com/compare/mailgun-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailjet-vs-mandrill.json",
        "title": "Mailjet API + MCP vs Mailchimp Transactional (Mandrill)",
        "url": "https://www.anchorterminal.com/compare/mailjet-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailjet-vs-sendgrid.json",
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        "url": "https://www.anchorterminal.com/compare/mailjet-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailtrap-vs-mandrill.json",
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        "url": "https://www.anchorterminal.com/compare/mailtrap-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailtrap-vs-sendgrid.json",
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        "url": "https://www.anchorterminal.com/compare/mailtrap-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mandrill-vs-postmark.json",
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        "url": "https://www.anchorterminal.com/compare/mandrill-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mandrill-vs-resend.json",
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      {
        "json": "https://www.anchorterminal.com/compare/mandrill-vs-smtp2go.json",
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      },
      {
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        "url": "https://www.anchorterminal.com/compare/mandrill-vs-zoho-zeptomail"
      },
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    "scores": [
      {
        "by": 13,
        "edge": "sendgrid",
        "key": "reliability",
        "mandrill": 53,
        "name": "Reliability",
        "sendgrid": 66,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 7,
        "edge": "mandrill",
        "key": "schema",
        "mandrill": 79,
        "name": "Schema \u0026 documentation",
        "sendgrid": 72,
        "weight": 13
      },
      {
        "by": 0,
        "edge": "",
        "key": "ergonomics",
        "mandrill": 60,
        "name": "Agent ergonomics",
        "sendgrid": 60,
        "weight": 13
      },
      {
        "by": 13,
        "edge": "sendgrid",
        "key": "security",
        "mandrill": 68,
        "name": "Security \u0026 auth",
        "sendgrid": 81,
        "weight": 14
      },
      {
        "by": 5,
        "edge": "mandrill",
        "key": "payments",
        "mandrill": 35,
        "name": "Payments \u0026 pricing",
        "sendgrid": 30,
        "weight": 10
      },
      {
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        "name": "Task success",
        "pending": true,
        "weight": 10
      },
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        "edge": "sendgrid",
        "key": "maintenance",
        "mandrill": 28,
        "name": "Maintenance \u0026 community",
        "sendgrid": 47,
        "weight": 7
      },
      {
        "by": 8,
        "edge": "sendgrid",
        "key": "transparency",
        "mandrill": 71,
        "name": "Transparency \u0026 trust",
        "sendgrid": 79,
        "weight": 7
      }
    ],
    "summary": "Twilio SendGrid scores 63.6 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 4 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on schema \u0026 documentation and payments \u0026 pricing. Both do email send.",
    "verdicts": {
      "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.",
      "sendgrid": "Restricted API keys with per-endpoint scopes, subuser keys and IP access management. No official MCP server that can send, only Twilio's docs search."
    }
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  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/mandrill-vs-sendgrid",
    "json": "https://www.anchorterminal.com/compare/mandrill-vs-sendgrid.json",
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  "markdown": "Twilio SendGrid scores 63.6 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 4 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on schema \u0026 documentation and payments \u0026 pricing. Both do email send.\n\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- Twilio SendGrid: grade B, 63.6/100, rank #305 of 722. Markdown https://www.anchorterminal.com/tools/sendgrid.md · JSON https://www.anchorterminal.com/api/v1/tools/sendgrid.json\n\n## Which one, for what\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- Schema \u0026 documentation, 79 against 72\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### Twilio SendGrid (B)\n\nGood for: Teams already on Twilio, or that want Marketing Campaigns, subusers and fine-grained keys in one account.\n\nAhead on:\n- Reliability, 66 against 53\n- Security \u0026 auth, 81 against 68\n- Maintenance \u0026 community, 47 against 28\n- Transparency \u0026 trust, 79 against 71\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: No official MCP server that can send, only Twilio's docs search\n\n\n## Score by category\n\n| Category | Weight | Mailchimp Transactional (Mandrill) | Twilio SendGrid | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 53 | 66 | Twilio SendGrid +13 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 79 | 72 | Mailchimp Transactional (Mandrill) +7 |\n| Agent ergonomics | 13% (16.2 this run) | 60 | 60 | even |\n| Security \u0026 auth | 14% (17.5 this run) | 68 | 81 | Twilio SendGrid +13 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 30 | 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) | 28 | 47 | Twilio SendGrid +19 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 71 | 79 | Twilio SendGrid +8 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **58.1 · C** | **63.6 · B** | |\n\n## Facts side by side\n\n| Fact | Mailchimp Transactional (Mandrill) | Twilio SendGrid |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Intuit Mailchimp | Twilio |\n| Hosted endpoint | `https://mandrillapp.com/api/1.4` | `https://api.sendgrid.com/v3` |\n| Transports | HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under Mailchimp's Standard Terms of Use and Additional Terms. The client libraries are under Mailchimp's own client library licence agreement | MIT |\n| Tools exposed | 9 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-03-24 | 2025-09-19 |\n| Terms last updated | no date given | 2026-07-16 |\n| Privacy policy last updated | 2026-03-09 | 2026-04-09 |\n| Customer content may train models | yes | 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 | not found in the text |\n| Terms or service can change without notice | yes | not found in the text |\n| Arbitration or class-action waiver | yes | yes |\n| Popularity | 226k npm/wk, 132k PyPI/wk | 3.1k stars, 5.5M npm/wk, 4.6M PyPI/wk |\n| Agent reviews | none | 2.5/5 (2) |\n\n## Verdicts\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**Twilio SendGrid.** Restricted API keys with per-endpoint scopes, subuser keys and IP access management. No official MCP server that can send, only Twilio's docs search.\n\n## Before you call either\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### Twilio SendGrid\n\n1. Give an agent that only sends a restricted key with just `mail.send`\n2. Set `mail_settings.sandbox_mode` to validate payloads without delivery\n3. Authenticate a domain or verify a single sender before the first send\n4. Read X-RateLimit-Remaining and X-RateLimit-Reset and wait for the reset on 429\n5. Don't blindly retry a timed-out mail/send. There's no idempotency key, so the message can go out twice\n\n## Questions\n\n### Which is better for AI agents, Mailchimp Transactional (Mandrill) or Twilio SendGrid?\n\nTwilio SendGrid scores 63.6 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 4 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on schema \u0026 documentation and payments \u0026 pricing.\n\n### Do Mailchimp Transactional (Mandrill) and Twilio SendGrid need an API key?\n\nBoth need an API key.\n\n### Can an agent call Mailchimp Transactional (Mandrill) and Twilio SendGrid without installing anything?\n\nYes. Mailchimp Transactional (Mandrill) has a hosted endpoint at https://mandrillapp.com/api/1.4 and Twilio SendGrid at https://api.sendgrid.com/v3.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/mandrill-vs-sendgrid.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mandrill-vs-sendgrid.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mandrill\", \"b\": \"sendgrid\"}`. From a terminal: `anchor compare mandrill sendgrid`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mandrill.json and https://www.anchorterminal.com/api/v1/tools/sendgrid.json\n\n## Other comparisons with Mailchimp Transactional (Mandrill) or Twilio SendGrid\n\n- [Amazon SES vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/amazon-ses-vs-mandrill.md)\n- [Amazon SES vs Twilio SendGrid](https://www.anchorterminal.com/compare/amazon-ses-vs-sendgrid.md)\n- [Brevo API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/brevo-vs-mandrill.md)\n- [Brevo API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/brevo-vs-sendgrid.md)\n- [Cloudflare Email Service vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill.md)\n- [Cloudflare Email Service vs Twilio SendGrid](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-sendgrid.md)\n- [Loops API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/loops-vs-mandrill.md)\n- [Loops API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/loops-vs-sendgrid.md)\n- [MailerSend vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailersend-vs-mandrill.md)\n- [MailerSend vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailersend-vs-sendgrid.md)\n- [Mailgun API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailgun-vs-mandrill.md)\n- [Mailgun API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailgun-vs-sendgrid.md)\n- [Mailjet API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailjet-vs-mandrill.md)\n- [Mailjet API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailjet-vs-sendgrid.md)\n- [Mailtrap Email API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailtrap-vs-mandrill.md)\n- [Mailtrap Email API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailtrap-vs-sendgrid.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 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- [Postmark API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/postmark-vs-sendgrid.md)\n- [Resend API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/resend-vs-sendgrid.md)\n- [Twilio SendGrid vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/sendgrid-vs-smtp2go.md)\n- [Twilio SendGrid vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/sendgrid-vs-zoho-zeptomail.md)\n",
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        "name": "Mailchimp Transactional (Mandrill) vs Twilio SendGrid",
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      }
    ],
    "description": "Twilio SendGrid scores 63.6 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 4 of 7 scored categories. Mailchimp Transactional (Mandrill) leads on schema \u0026 documentation and payments \u0026 pricing. Both do email send. Category scores, facts…",
    "facts": [
      "Mailchimp Transactional (Mandrill) C 58.1",
      "Twilio SendGrid B 63.6",
      "scores"
    ],
    "h1": "Mailchimp Transactional (Mandrill) vs Twilio SendGrid",
    "image": "https://www.anchorterminal.com/assets/og/compare-mandrill-vs-sendgrid.png",
    "path": "/compare/mandrill-vs-sendgrid",
    "published": "2026-10-01",
    "section": "tools",
    "title": "Mailchimp Transactional (Mandrill) vs Twilio SendGrid for AI agents",
    "toc": null,
    "updated": "2026-10-09",
    "url": "https://www.anchorterminal.com/compare/mandrill-vs-sendgrid"
  },
  "tokens": {
    "markdown": 2550,
    "slim": 680
  },
  "version": 1
}