{
  "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": 59.5,
        "grade": "C",
        "agentReady": false,
        "rank": 264,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 7,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 53,
          "maintenance": 79,
          "payments": 30,
          "reliability": 62,
          "schema": 76,
          "security": 52,
          "transparency": 73
        },
        "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.",
        "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": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 59.5
          }
        ],
        "editorialScores": {
          "ergonomics": 53,
          "maintenance": 79,
          "payments": 30,
          "reliability": 62,
          "schema": 76,
          "security": 52,
          "transparency": 55
        },
        "provenanceScore": 90
      },
      "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": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/mailjet.json",
      "live": {
        "slug": "mailjet",
        "probe": {
          "target": "https://api.mailjet.com/v3.1",
          "method": "get",
          "lastAt": "2026-10-05T00:57:23.456210136Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 43,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 48,
          "p95ms24h": 139,
          "samples24h": 272,
          "samples30d": 1113,
          "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": 11,
              "ok": 11
            }
          ]
        },
        "vendorStatus": {
          "page": "https://mailjet.statuspage.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-05T00:53:56.181185609Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "mailjet/mailjet-apiv3-nodejs",
            "version": "v7.1.0",
            "released": "2026-08-19",
            "seenAt": "2026-10-04T16:32:25.488655721Z"
          },
          {
            "registry": "npm",
            "name": "@mailjet/mailjet-mcp-server",
            "version": "1.1.0",
            "seenAt": "2026-10-04T16:32:23.608016042Z"
          },
          {
            "registry": "npm",
            "name": "node-mailjet",
            "version": "6.0.11",
            "seenAt": "2026-10-04T16:32:23.044348854Z"
          },
          {
            "registry": "pypi",
            "name": "mailjet-rest",
            "version": "1.9.0",
            "released": "2026-09-14",
            "seenAt": "2026-10-04T16:32:25.305171581Z"
          }
        ],
        "githubStars": 255,
        "npmWeekly": 187414,
        "pypiWeekly": 238046,
        "securityTxt": {
          "url": "https://mailjet.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:42.087773455Z"
        },
        "llmsTxt": {
          "url": "https://dev.mailjet.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:57.772258273Z"
        },
        "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": "2026-10-04T15:51:18.13806271Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "67d03918114f"
          },
          {
            "url": "https://www.mailjet.com/pricing/",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:51:16.153493813Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ca0a13159f03"
          },
          {
            "url": "https://www.mailjet.com/legal/privacy-policy/",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:51:12.111220481Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "43ec4206a3d6"
          },
          {
            "url": "https://www.mailjet.com/legal/terms/",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-04T15:51:14.142260312Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "bd8f1e18634f"
          }
        ],
        "updatedAt": "2026-10-05T00:57:23.456210136Z"
      }
    },
    "b": {
      "slug": "resend",
      "name": "Resend API + MCP",
      "vendor": "Resend",
      "vendorUrl": "https://resend.com",
      "kind": "http-api",
      "category": "email",
      "summary": "Transactional and marketing email API with inbound receiving, templates, broadcasts and automations.",
      "url": "https://www.anchorterminal.com/tools/resend",
      "markdownUrl": "https://www.anchorterminal.com/tools/resend.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/resend.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/resend.json",
      "repo": "https://github.com/resend/resend-mcp",
      "license": "MIT",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.resend.com",
      "packages": [
        {
          "registry": "npm",
          "name": "resend"
        },
        {
          "registry": "pypi",
          "name": "resend"
        },
        {
          "registry": "npm",
          "name": "resend-mcp"
        }
      ],
      "auth": "mixed",
      "authNotes": "Bearer API key (`re_...`) with full or sending-only permissions. Requests without a User-Agent header get a 403. The hosted MCP signs in with OAuth. The local MCP takes the key from `RESEND_API_KEY` or a `--key` flag.",
      "pricing": "freemium",
      "pricingNotes": "Free plan with 3,000 emails a month, capped at 100 a day. Pro $20 a month for 50,000 emails or $35 for 100,000, overage $0.90 per 1,000. Scale from $90 for 100,000 to $1,150 for 2,500,000, overage $0.90 down to $0.46 per 1,000. Received emails count towards the quota. Marketing is billed by contacts from $40 a month for 5,000. Dedicated IP $30 a month on Scale. Monthly billing only (https://resend.com/pricing).",
      "priceSummary": "$20 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in docs, pricing or MCP README (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 106,
      "popularity": {
        "githubStars": 575,
        "npmWeekly": 13608112,
        "pypiWeekly": 2840474,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://resend.com/docs",
      "llmsTxt": "https://resend.com/docs/llms.txt",
      "openapi": "https://raw.githubusercontent.com/resend/resend-openapi/main/resend.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": "2026-09-29",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 75.3,
        "grade": "BB",
        "agentReady": true,
        "rank": 38,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 1,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 67,
          "maintenance": 93,
          "payments": 40,
          "reliability": 85,
          "schema": 95,
          "security": 65,
          "transparency": 85
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "`Idempotency-Key` on POST /emails and /emails/batch, kept for 24 hours. 106 MCP tools load at once, with no toolsets.",
        "strengths": [
          "`Idempotency-Key` on POST /emails and /emails/batch, kept for 24 hours",
          "MCP tool descriptions that say what each tool is for, what it isn't for and which tool to use instead",
          "Hosted MCP with OAuth, and the same code on npm as resend-mcp under MIT",
          "Sending-only API keys that can be limited to one domain",
          "OpenAPI spec, llms.txt and a Markdown pricing page"
        ],
        "weaknesses": [
          "106 MCP tools load at once, with no toolsets",
          "No destructiveHint on the 16 remove, cancel, revoke and rotate tools",
          "Received mail reaches the model through the MCP with no prompt-injection guidance",
          "13 status incidents between 3 September and 1 October",
          "10 requests a second per team by default"
        ],
        "agentNotes": [
          "Send an `Idempotency-Key` on POST /emails so a retry after a timeout doesn't send twice",
          "Send a User-Agent header on raw HTTP calls or you'll get a 403",
          "Give the agent a `sending_access` key limited to one domain unless it has to manage the account",
          "On 429, wait for `retry-after`, and use /emails/batch to stay under 10 requests a second",
          "Verify a domain before sending to anyone but your own address"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 8,
        "avgRating": 3.4,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 75.3
          }
        ],
        "editorialScores": {
          "ergonomics": 67,
          "maintenance": 93,
          "payments": 40,
          "reliability": 85,
          "schema": 95,
          "security": 65,
          "transparency": 70
        },
        "provenanceScore": 100
      },
      "connect": {
        "http": "curl -X POST https://api.resend.com/emails -H \"Authorization: Bearer $RESEND_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"from\":\"onboarding@resend.dev\",\"to\":[\"delivered@resend.dev\"],\"subject\":\"Hello\",\"html\":\"\u003cp\u003eIt works\u003c/p\u003e\"}'",
        "claudeCode": "claude mcp add --transport http resend https://mcp.resend.com/mcp",
        "config": {
          "mcpServers": {
            "resend": {
              "args": [
                "-y",
                "resend-mcp"
              ],
              "command": "npx",
              "env": {
                "RESEND_API_KEY": "${RESEND_API_KEY}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/resend"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Pro 50k",
          "unit": "month",
          "usd": 20,
          "note": "50,000 emails"
        },
        {
          "item": "Pro 100k",
          "unit": "month",
          "usd": 35,
          "note": "100,000 emails"
        },
        {
          "item": "Scale 100k",
          "unit": "month",
          "usd": 90,
          "note": "100,000 emails"
        },
        {
          "item": "Scale 1M",
          "unit": "month",
          "usd": 650,
          "note": "1,000,000 emails"
        },
        {
          "item": "Overage on Pro",
          "unit": "1k-emails",
          "usd": 0.9
        },
        {
          "item": "Overage on Scale 2.5M",
          "unit": "1k-emails",
          "usd": 0.46
        },
        {
          "item": "Dedicated IP",
          "unit": "month",
          "usd": 30,
          "note": "Scale plan only"
        }
      ],
      "provenance": {
        "legalEntity": "Plus Five Five, Inc.",
        "domain": "resend.com",
        "domainRegistered": "2002-08-23",
        "domainNote": "resend.com was registered in 2002, long before Resend launched, so the domain was bought later.",
        "endpointOnVendorDomain": true,
        "terms": "https://resend.com/legal/terms-of-service",
        "privacy": "https://resend.com/legal/privacy-policy",
        "statusPage": "https://resend-status.com",
        "changelog": "https://resend.com/changelog",
        "securityTxt": "valid",
        "checked": "2026-09-30",
        "notes": [
          "security.txt lists a contact and policy but no Expires field."
        ],
        "score": 100
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/resend.json",
      "live": {
        "slug": "resend",
        "probe": {
          "target": "https://api.resend.com",
          "method": "get",
          "lastAt": "2026-10-05T00:57:27.155859253Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 113,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 125,
          "p95ms24h": 201,
          "samples24h": 272,
          "samples30d": 1113,
          "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": 11,
              "ok": 11
            }
          ]
        },
        "vendorStatus": {
          "page": "https://resend-status.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-05T00:54:03.545680869Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "resend/resend-mcp",
            "version": "v2.24.0",
            "released": "2026-09-29",
            "seenAt": "2026-10-04T16:38:24.514059827Z"
          },
          {
            "registry": "npm",
            "name": "resend",
            "version": "6.32.0",
            "seenAt": "2026-10-04T16:38:22.290443175Z"
          },
          {
            "registry": "npm",
            "name": "resend-mcp",
            "version": "2.24.0",
            "seenAt": "2026-10-04T16:38:22.744379545Z"
          },
          {
            "registry": "pypi",
            "name": "resend",
            "version": "2.49.1",
            "released": "2026-10-03",
            "seenAt": "2026-10-04T16:38:22.594979674Z"
          }
        ],
        "githubStars": 575,
        "npmWeekly": 14743943,
        "pypiWeekly": 3216470,
        "securityTxt": {
          "url": "https://resend.com/.well-known/security.txt",
          "state": "valid",
          "checkedAt": "2026-10-04T15:15:54.998462322Z"
        },
        "llmsTxt": {
          "url": "https://resend.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:11.04604646Z"
        },
        "domain": {
          "domain": "resend.com",
          "registered": "2002-08-23",
          "source": "https://rdap.verisign.com/com/v1/domain/resend.com",
          "checkedAt": "2026-10-04T13:03:44.931905956Z"
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        "pages": [
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            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:47:18.439029536Z",
            "changedAt": "2026-10-02T15:23:32.923810199Z",
            "fingerprint": "cd73194bec20"
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          {
            "url": "https://resend.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:47:24.580676617Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ce7e4c1c6509"
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          {
            "url": "https://resend.com/legal/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:47:20.660553723Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ad5261c3e915"
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          {
            "url": "https://resend.com/legal/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:47:22.624075752Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "e09589be6323"
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        "updatedAt": "2026-10-05T00:57:27.155859253Z"
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  "markdown": "Resend API + MCP has a score of 75.3 (BB) against Mailjet API + MCP's 59.5 (C). Both do email send. The largest gap is reliability, 23 points.\n\n- Mailjet API + MCP: grade C, 59.5/100, rank #264 of 452. Markdown https://www.anchorterminal.com/tools/mailjet.md · JSON https://www.anchorterminal.com/api/v1/tools/mailjet.json\n- Resend API + MCP: grade BB, 75.3/100, rank #38 of 452. Markdown https://www.anchorterminal.com/tools/resend.md · JSON https://www.anchorterminal.com/api/v1/tools/resend.json\n\n## Which one, for what\n\nPick Mailjet API + MCP for nothing in particular (no category where it leads by five points or more).\n\nPick Resend API + MCP for reliability (+23), schema \u0026 documentation (+19), agent ergonomics (+14), security \u0026 auth (+13), payments \u0026 pricing (+10), maintenance \u0026 community (+14), transparency \u0026 trust (+12).\n\n## Score by category\n\n| Category | Weight | Mailjet API + MCP | Resend API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 62 | 85 | Resend API + MCP +23 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 76 | 95 | Resend API + MCP +19 |\n| Agent ergonomics | 13% (16.2 this run) | 53 | 67 | Resend API + MCP +14 |\n| Security \u0026 auth | 14% (17.5 this run) | 52 | 65 | Resend API + MCP +13 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 40 | Resend API + MCP +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 79 | 93 | Resend API + MCP +14 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 73 | 85 | Resend API + MCP +12 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **59.5 · C** | **75.3 · BB** | |\n\n## Facts side by side\n\n| Fact | Mailjet API + MCP | Resend API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Mailjet (Sinch) | Resend |\n| Hosted endpoint | `https://api.mailjet.com/v3.1` | `https://api.resend.com` |\n| Transports | HTTP, stdio | HTTP, Streamable HTTP, stdio |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | MIT | MIT |\n| Tools exposed | 117 | 106 |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | not listed |\n| Last release | 2026-09-14 | 2026-09-29 |\n| Popularity | 255 stars, 177k npm/wk, 245k PyPI/wk | 575 stars, 13.6M npm/wk, 2.8M PyPI/wk |\n| Agent reviews | 2.5/5 (2) | 3.4/5 (8) |\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**Resend API + MCP.** `Idempotency-Key` on POST /emails and /emails/batch, kept for 24 hours. 106 MCP tools load at once, with no toolsets.\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### Resend API + MCP\n\n1. Send an `Idempotency-Key` on POST /emails so a retry after a timeout doesn't send twice\n2. Send a User-Agent header on raw HTTP calls or you'll get a 403\n3. Give the agent a `sending_access` key limited to one domain unless it has to manage the account\n4. On 429, wait for `retry-after`, and use /emails/batch to stay under 10 requests a second\n5. Verify a domain before sending to anyone but your own address\n\n## Other comparisons with Mailjet API + MCP or Resend API + MCP\n\n- [Amazon SES vs Mailjet API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-mailjet.md)\n- [Amazon SES vs Resend API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-resend.md)\n- [Brevo API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailjet.md)\n- [Brevo API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/brevo-vs-resend.md)\n- [Loops API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailjet.md)\n- [Loops API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/loops-vs-resend.md)\n- [Mailgun API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-mailjet.md)\n- [Mailgun API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-resend.md)\n- [Mailjet API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-postmark.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- [Postmark API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/postmark-vs-resend.md)\n- [Resend API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/resend-vs-sendgrid.md)\n- [Resend API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/resend-vs-smtp2go.md)\n",
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        "name": "Mailjet API + MCP vs Resend API + MCP",
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    "description": "Resend API + MCP has a score of 75.3 (BB) against Mailjet API + MCP's 59.5 (C). Both do email send. The largest gap is reliability, 23 points. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "Mailjet API + MCP vs Resend API + MCP for AI agents, C 59.5 vs BB 75.3",
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