{
  "data": {
    "a": {
      "slug": "groundmail",
      "name": "Groundmail API + MCP",
      "vendor": "Groundmail",
      "vendorUrl": "https://groundmail.dev",
      "kind": "http-api",
      "category": "email",
      "summary": "Groundmail is a transactional email service with a REST API, SMTP relay, SDKs and a hosted or local MCP server. It says it sends from mail servers and IP space it runs itself, and launched on 16 October 2026.",
      "url": "https://www.anchorterminal.com/tools/groundmail",
      "markdownUrl": "https://www.anchorterminal.com/tools/groundmail.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/groundmail.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/groundmail.json",
      "repo": "https://github.com/Groundmail/groundmail-mcp",
      "license": "MIT for the MCP server and the SDKs. The email service is closed source",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.groundmail.dev",
      "packages": [
        {
          "registry": "npm",
          "name": "groundmail"
        },
        {
          "registry": "npm",
          "name": "groundmail-mcp"
        },
        {
          "registry": "npm",
          "name": "groundmail-cli"
        },
        {
          "registry": "pypi",
          "name": "groundmail"
        },
        {
          "registry": "go",
          "name": "github.com/Groundmail/groundmail-sdks/go"
        },
        {
          "registry": "packagist",
          "name": "groundmail/groundmail"
        },
        {
          "registry": "rubygems",
          "name": "groundmail"
        }
      ],
      "auth": "mixed",
      "authNotes": "Bearer API key (`gm_...`) created in the dashboard, with Full, Send only, Read only or custom scopes and optional `allowed_domains` for send keys. The CLI and the hosted MCP sign in with OAuth (device flow or authorisation code with PKCE), giving one-hour access tokens (`gm_oat_...`) and rotating refresh tokens. The SMTP relay uses separate `gmsmtp_...` credentials.",
      "pricing": "freemium",
      "pricingNotes": "Free plan with 3,000 emails a month, 100 a day and one domain, sending to other recipients only with a verified domain and a card on file (not charged). Pro from $20 a month for 50,000 emails, overage $0.90 per 1,000. Scale from $90 for 100,000 to $1,150 for 2,500,000, overage down to $0.46 per 1,000. Dedicated server from $299 a month with 250,000 emails. Dedicated IPs $50 a month each on Scale. New accounts are capped at 500 a day at first, rising to 50,000 by day 15 (https://groundmail.dev/pricing/).",
      "priceSummary": "$20 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in llms-full.txt, the OpenAPI document or the pricing page (checked 2026-10-17). Billing is through Stripe.",
        "endpoints": []
      },
      "toolCount": 20,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-17"
      },
      "docsUrl": "https://docs.groundmail.dev",
      "llmsTxt": "https://docs.groundmail.dev/llms.txt",
      "openapi": "https://docs.groundmail.dev/openapi.yaml",
      "registryName": "io.github.Groundmail/groundmail",
      "capabilities": [
        "email.send",
        "email.domains",
        "email.templates",
        "email.inbound",
        "email.analytics"
      ],
      "tags": [
        "hosted",
        "freemium",
        "card-required",
        "mcp",
        "oauth",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "go",
        "php",
        "ruby",
        "webhooks",
        "cli",
        "agent-skills",
        "closed-source",
        "pre-1.0",
        "new"
      ],
      "lastRelease": "2026-10-17",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 57.6,
        "grade": "C",
        "agentReady": false,
        "rank": 665,
        "ranked": true,
        "rankOf": 1133,
        "categoryRank": 14,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 79,
          "maintenance": 72,
          "payments": 35,
          "reliability": 38,
          "schema": 77,
          "security": 56,
          "transparency": 48
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-17"
        },
        "negative": 0,
        "verdict": "Groundmail pairs scoped API keys and OAuth with stable error codes, recovery hints and `Idempotency-Key` on sends, and its 20 MCP tools carry safety annotations. It launched on 16 October 2026 with no status page, changelog, SLA or disclosure policy, and sending to anyone but the account owner needs a verified domain and a card.",
        "bestFor": "Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors.",
        "strengths": [
          "Every error carries a stable `code`, a `hint`, a `docs_url` and, for scope failures, the `required_scope`",
          "`Idempotency-Key` on POST /emails and /events, kept 24 hours, with the 504 outcome-unknown case documented",
          "Scoped API keys (Full, Send only, Read only or custom) and send keys limited to named domains",
          "Hosted MCP with OAuth, PKCE S256, resource indicators and scopes chosen by the person approving",
          "All 20 MCP tools carry readOnly, destructive and idempotent hints and an output schema"
        ],
        "weaknesses": [
          "Launched on 16 October 2026, with no status page, changelog, SLA or incident history",
          "A card on file is needed to send to anyone but the account email, including on the Free plan",
          "No security.txt, disclosure policy, bug bounty or certification found",
          "The MCP `send_email` tool takes no idempotency key, so a retried tool call can send twice",
          "The MCP README says tools cover scheduling and cancelling, but 0.6.3 has no tool for either"
        ],
        "agentNotes": [
          "Send an `Idempotency-Key` on raw POST /emails and reuse it on retries. On 504, check GET /emails before sending again",
          "Test from `noreply@mail.groundmail.dev` to the account email only. Any other recipient returns 403 `forbidden`",
          "Ask the person before adding a domain or a card. Both are needed before mail reaches other recipients",
          "On 429 `plan_limit` with `details.reason: \"warmup\"`, wait until `details.resets_at`. Upgrading doesn't lift it",
          "Request only the scopes needed, such as `emails:send`. An OAuth request with no scope gets `full`"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 4,
        "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": 57.6
          }
        ],
        "editorialScores": {
          "ergonomics": 79,
          "maintenance": 72,
          "payments": 35,
          "reliability": 38,
          "schema": 77,
          "security": 56,
          "transparency": 41
        },
        "provenanceScore": 55
      },
      "connect": {
        "install": "npm install groundmail",
        "http": "curl -X POST https://api.groundmail.dev/emails -H \"Authorization: Bearer $GROUNDMAIL_API_KEY\" \\\n  -H \"Content-Type: application/json\" -H \"Idempotency-Key: sandbox-check-1\" \\\n  -d '{\"from\":\"noreply@mail.groundmail.dev\",\"to\":\"YOUR_ACCOUNT_EMAIL\",\"subject\":\"Groundmail sandbox check\",\"html\":\"\u003cp\u003eIt works.\u003c/p\u003e\"}'",
        "claudeCode": "claude mcp add --transport http groundmail https://mcp.groundmail.dev/mcp",
        "config": {
          "mcpServers": {
            "groundmail": {
              "args": [
                "-y",
                "groundmail-mcp"
              ],
              "command": "npx",
              "env": {
                "GROUNDMAIL_API_KEY": "${GROUNDMAIL_API_KEY}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/groundmail"
      },
      "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 server",
          "unit": "month",
          "usd": 299,
          "note": "250,000 emails included, $0.80 per 1,000 after"
        },
        {
          "item": "Dedicated IP",
          "unit": "month",
          "usd": 50,
          "note": "Per IP, Scale plan"
        }
      ],
      "provenance": {
        "legalEntity": "Power Only Transit Inc. dba Groundmail",
        "domain": "groundmail.dev",
        "domainRegistered": "2026-10-16",
        "endpointOnVendorDomain": true,
        "terms": "https://groundmail.dev/legal/terms/",
        "privacy": "https://groundmail.dev/legal/privacy/",
        "statusPage": "",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-17",
        "notes": [
          "The terms and privacy policy name Power Only Transit Inc. dba Groundmail, 2780 S. Jones Blvd #200-3432, Las Vegas, NV 89146, and Delaware law.",
          "RDAP gives groundmail.dev a registration time of 2026-10-16T03:15Z. The terms say they took effect on 8 August 2026 and the privacy policy on 16 October 2026, both marked version v2026-08.",
          "security.txt answered 404 on groundmail.dev and docs.groundmail.dev. status.groundmail.dev doesn't resolve, and groundmail.dev/status, docs.groundmail.dev/changelog and groundmail.dev/security/ answer 404.",
          "robots.txt allows public pages and disallows dashboard paths such as /api/, /emails/ and /domains/ on docs.groundmail.dev. Only allowed paths were read."
        ],
        "score": 55
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/groundmail.json",
      "live": {
        "slug": "groundmail",
        "probe": {
          "target": "https://api.groundmail.dev",
          "method": "get",
          "lastAt": "2026-10-18T00:14:41.979024896Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 648,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 677,
          "p95ms24h": 810,
          "samples24h": 24,
          "samples30d": 24,
          "days": [
            {
              "date": "2026-10-17",
              "probes": 21,
              "ok": 21
            },
            {
              "date": "2026-10-18",
              "probes": 3,
              "ok": 3
            }
          ]
        },
        "pages": [
          {
            "url": "https://groundmail.dev/pricing/",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-17T23:03:51.382426956Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "d31886163215"
          },
          {
            "url": "https://groundmail.dev/legal/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-17T23:03:47.325144117Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "b568fc16407f"
          },
          {
            "url": "https://groundmail.dev/legal/terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-17T23:03:49.387195166Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "b4c6edee2cc6"
          }
        ],
        "updatedAt": "2026-10-18T00:14:41.979024896Z"
      }
    },
    "answer": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Groundmail API + MCP's 57.6 (C), and leads in 3 of 7 scored categories. Groundmail API + MCP leads on agent ergonomics and payments \u0026 pricing.",
    "b": {
      "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": 604,
        "ranked": true,
        "rankOf": 1133,
        "categoryRank": 12,
        "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": "2026-10-18T00:14:46.367618114Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 49,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 49,
          "p95ms24h": 143,
          "samples24h": 253,
          "samples30d": 4435,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 268,
              "ok": 268
            },
            {
              "date": "2026-10-09",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-10",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-11",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-12",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-13",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-14",
              "probes": 249,
              "ok": 249
            },
            {
              "date": "2026-10-15",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-16",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-17",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-18",
              "probes": 3,
              "ok": 3
            }
          ]
        },
        "vendorStatus": {
          "page": "https://mailjet.statuspage.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-18T00:08:45.346921252Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "mailjet/mailjet-apiv3-nodejs",
            "version": "v7.1.0",
            "released": "2026-08-19",
            "seenAt": "2026-10-17T01:59:40.507630163Z"
          },
          {
            "registry": "npm",
            "name": "@mailjet/mailjet-mcp-server",
            "version": "1.1.0",
            "seenAt": "2026-10-17T01:59:38.880560456Z"
          },
          {
            "registry": "npm",
            "name": "node-mailjet",
            "version": "6.0.11",
            "seenAt": "2026-10-17T01:59:38.098774038Z"
          },
          {
            "registry": "pypi",
            "name": "mailjet-rest",
            "version": "1.9.1",
            "released": "2026-10-07",
            "seenAt": "2026-10-17T01:59:40.314147819Z"
          }
        ],
        "githubStars": 255,
        "npmWeekly": 164198,
        "pypiWeekly": 212301,
        "securityTxt": {
          "url": "https://mailjet.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-17T15:51:30.867103696Z"
        },
        "llmsTxt": {
          "url": "https://dev.mailjet.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-17T14:22:30.83233882Z"
        },
        "domain": {
          "domain": "mailjet.com",
          "registered": "2006-11-08",
          "source": "https://rdap.verisign.com/com/v1/domain/mailjet.com",
          "checkedAt": "2026-10-11T13:15:47.837380067Z"
        },
        "pages": [
          {
            "url": "https://www.mailjet.com/releases/",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-17T23:17:47.568998142Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "67d03918114f"
          },
          {
            "url": "https://www.mailjet.com/pricing/",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-17T23:17:45.549603849Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ca0a13159f03"
          },
          {
            "url": "https://www.mailjet.com/legal/privacy-policy/",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-17T23:17:41.528590925Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "43ec4206a3d6"
          },
          {
            "url": "https://www.mailjet.com/legal/terms/",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-17T23:17:43.578913722Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "bd8f1e18634f"
          }
        ],
        "updatedAt": "2026-10-18T00:14:46.367618114Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Groundmail",
        "b": "Mailjet (Sinch)",
        "name": "Vendor"
      },
      {
        "a": "https://api.groundmail.dev",
        "b": "https://api.mailjet.com/v3.1",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable HTTP, stdio",
        "b": "HTTP, stdio",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "MIT for the MCP server and the SDKs. The email service is closed source",
        "b": "MIT",
        "name": "Licence"
      },
      {
        "a": "20",
        "b": "117",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "io.github.Groundmail/groundmail",
        "b": "not listed",
        "name": "MCP registry"
      },
      {
        "a": "2026-10-17",
        "b": "2026-09-14",
        "name": "Last release"
      },
      {
        "a": "",
        "b": "no date given",
        "name": "Terms last updated"
      },
      {
        "a": "",
        "b": "2026-09-29",
        "name": "Privacy policy last updated"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Customer content may train models"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "",
        "b": "yes",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "none",
        "b": "255 stars, 177k npm/wk, 245k PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "2.5/5 (4)",
        "b": "2.5/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Groundmail API + MCP's 57.6 (C), and leads in 3 of 7 scored categories. Groundmail API + MCP leads on agent ergonomics and payments \u0026 pricing.",
        "question": "Which is better for AI agents, Groundmail API + MCP or Mailjet API + MCP?"
      },
      {
        "answer": "Groundmail API + MCP takes an API key or an OAuth sign-in. Mailjet API + MCP needs an API key.",
        "question": "Do Groundmail API + MCP and Mailjet API + MCP need an API key?"
      },
      {
        "answer": "Yes. Groundmail API + MCP has a hosted endpoint at https://api.groundmail.dev and Mailjet API + MCP at https://api.mailjet.com/v3.1.",
        "question": "Can an agent call Groundmail API + MCP and Mailjet API + MCP without installing anything?"
      }
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    "goodFor": [
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          "Agent ergonomics, 79 against 53",
          "Payments \u0026 pricing, 35 against 30"
        ],
        "also": null,
        "goodFor": "Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors.",
        "slug": "groundmail",
        "watchFor": "Launched on 16 October 2026, with no status page, changelog, SLA or incident history"
      },
      {
        "aheadOn": [
          "Reliability, 62 against 38",
          "Maintenance \u0026 community, 79 against 72",
          "Transparency \u0026 trust, 72 against 48"
        ],
        "also": [
          "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"
      }
    ],
    "job": {
      "capability": "email.send",
      "name": "Sending email"
    },
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      },
      {
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        "json": "https://www.anchorterminal.com/compare/brevo-vs-mailjet.json",
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        "url": "https://www.anchorterminal.com/compare/brevo-vs-mailjet"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-groundmail.json",
        "title": "Cloudflare Email Service vs Groundmail API + MCP",
        "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-groundmail"
      },
      {
        "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"
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-loops"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groundmail-vs-mailersend.json",
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-mailersend"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groundmail-vs-mailgun.json",
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-mailgun"
      },
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        "json": "https://www.anchorterminal.com/compare/groundmail-vs-mailtrap.json",
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-mailtrap"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groundmail-vs-mandrill.json",
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groundmail-vs-postmark.json",
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-postmark"
      },
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        "json": "https://www.anchorterminal.com/compare/groundmail-vs-resend.json",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/groundmail-vs-sendgrid.json",
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groundmail-vs-smtp2go.json",
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-smtp2go"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail.json",
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        "url": "https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail"
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        "json": "https://www.anchorterminal.com/compare/loops-vs-mailjet.json",
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      },
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        "url": "https://www.anchorterminal.com/compare/mailjet-vs-sendgrid"
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        "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"
      }
    ],
    "scores": [
      {
        "by": 24,
        "edge": "mailjet",
        "groundmail": 38,
        "key": "reliability",
        "mailjet": 62,
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 1,
        "edge": "groundmail",
        "groundmail": 77,
        "key": "schema",
        "mailjet": 76,
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "by": 26,
        "edge": "groundmail",
        "groundmail": 79,
        "key": "ergonomics",
        "mailjet": 53,
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "by": 4,
        "edge": "groundmail",
        "groundmail": 56,
        "key": "security",
        "mailjet": 52,
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "by": 5,
        "edge": "groundmail",
        "groundmail": 35,
        "key": "payments",
        "mailjet": 30,
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 7,
        "edge": "mailjet",
        "groundmail": 72,
        "key": "maintenance",
        "mailjet": 79,
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "by": 24,
        "edge": "mailjet",
        "groundmail": 48,
        "key": "transparency",
        "mailjet": 72,
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Groundmail API + MCP's 57.6 (C), and leads in 3 of 7 scored categories. Groundmail API + MCP leads on agent ergonomics and payments \u0026 pricing. Both do sending email.",
    "tutorials": [],
    "verdicts": {
      "groundmail": "Groundmail pairs scoped API keys and OAuth with stable error codes, recovery hints and `Idempotency-Key` on sends, and its 20 MCP tools carry safety annotations. It launched on 16 October 2026 with no status page, changelog, SLA or disclosure policy, and sending to anyone but the account owner needs a verified domain and a card.",
      "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."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/groundmail-vs-mailjet",
    "json": "https://www.anchorterminal.com/compare/groundmail-vs-mailjet.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/groundmail-vs-mailjet.md",
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  "markdown": "Mailjet API + MCP scores 59.4 (C) on agent readiness against Groundmail API + MCP's 57.6 (C), and leads in 3 of 7 scored categories. Groundmail API + MCP leads on agent ergonomics and payments \u0026 pricing. Both do sending email.\n\n- Groundmail API + MCP: grade C, 57.6/100, rank #665 of 1133. Markdown https://www.anchorterminal.com/tools/groundmail.md · JSON https://www.anchorterminal.com/api/v1/tools/groundmail.json\n- Mailjet API + MCP: grade C, 59.4/100, rank #604 of 1133. Markdown https://www.anchorterminal.com/tools/mailjet.md · JSON https://www.anchorterminal.com/api/v1/tools/mailjet.json\n- Best email delivery APIs for AI agents: https://www.anchorterminal.com/best/email/index.md\n- All 120 email comparisons: https://www.anchorterminal.com/compare/email/index.md\n\n## Which one, for what\n\n### Groundmail API + MCP (C)\n\nGood for: Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors.\n\nAhead on:\n- Agent ergonomics, 79 against 53\n- Payments \u0026 pricing, 35 against 30\n\nWatch for: Launched on 16 October 2026, with no status page, changelog, SLA or incident history\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 38\n- Maintenance \u0026 community, 79 against 72\n- Transparency \u0026 trust, 72 against 48\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: The MCP server registers 117 GET-only tools and can't send\n\n\n## Score by category\n\n| Category | Weight | Groundmail API + MCP | Mailjet API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 38 | 62 | Mailjet API + MCP +24 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 77 | 76 | Groundmail API + MCP +1 |\n| Agent ergonomics | 13% (16.2 this run) | 79 | 53 | Groundmail API + MCP +26 |\n| Security \u0026 auth | 14% (17.5 this run) | 56 | 52 | Groundmail API + MCP +4 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 30 | Groundmail API + MCP +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 72 | 79 | Mailjet API + MCP +7 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 48 | 72 | Mailjet API + MCP +24 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **57.6 · C** | **59.4 · C** | |\n\n## Facts side by side\n\n| Fact | Groundmail API + MCP | Mailjet API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Groundmail | Mailjet (Sinch) |\n| Hosted endpoint | `https://api.groundmail.dev` | `https://api.mailjet.com/v3.1` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP, stdio |\n| Auth | OAuth or key | API key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | MIT for the MCP server and the SDKs. The email service is closed source | MIT |\n| Tools exposed | 20 | 117 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | `io.github.Groundmail/groundmail` | not listed |\n| Last release | 2026-10-17 | 2026-09-14 |\n| Terms last updated |  | no date given |\n| Privacy policy last updated |  | 2026-09-29 |\n| Customer content may train models |  | not found in the text |\n| Terms restrict automated access |  | not found in the text |\n| Terms restrict benchmarking |  | not found in the text |\n| Terms or service can change without notice |  | not found in the text |\n| Arbitration or class-action waiver |  | yes |\n| Popularity | none | 255 stars, 177k npm/wk, 245k PyPI/wk |\n| Agent reviews | 2.5/5 (4) | 2.5/5 (2) |\n\n## Verdicts\n\n**Groundmail API + MCP.** Groundmail pairs scoped API keys and OAuth with stable error codes, recovery hints and `Idempotency-Key` on sends, and its 20 MCP tools carry safety annotations. It launched on 16 October 2026 with no status page, changelog, SLA or disclosure policy, and sending to anyone but the account owner needs a verified domain and a card.\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## Before you call either\n\n### Groundmail API + MCP\n\n1. Send an `Idempotency-Key` on raw POST /emails and reuse it on retries. On 504, check GET /emails before sending again\n2. Test from `noreply@mail.groundmail.dev` to the account email only. Any other recipient returns 403 `forbidden`\n3. Ask the person before adding a domain or a card. Both are needed before mail reaches other recipients\n4. On 429 `plan_limit` with `details.reason: \"warmup\"`, wait until `details.resets_at`. Upgrading doesn't lift it\n5. Request only the scopes needed, such as `emails:send`. An OAuth request with no scope gets `full`\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## Questions\n\n### Which is better for AI agents, Groundmail API + MCP or Mailjet API + MCP?\n\nMailjet API + MCP scores 59.4 (C) on agent readiness against Groundmail API + MCP's 57.6 (C), and leads in 3 of 7 scored categories. Groundmail API + MCP leads on agent ergonomics and payments \u0026 pricing.\n\n### Do Groundmail API + MCP and Mailjet API + MCP need an API key?\n\nGroundmail API + MCP takes an API key or an OAuth sign-in. Mailjet API + MCP needs an API key.\n\n### Can an agent call Groundmail API + MCP and Mailjet API + MCP without installing anything?\n\nYes. Groundmail API + MCP has a hosted endpoint at https://api.groundmail.dev and Mailjet API + MCP at https://api.mailjet.com/v3.1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/groundmail-vs-mailjet.json, and with the fewest tokens: https://www.anchorterminal.com/compare/groundmail-vs-mailjet.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"groundmail\", \"b\": \"mailjet\"}`. From a terminal: `anchor compare groundmail mailjet`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/groundmail.json and https://www.anchorterminal.com/api/v1/tools/mailjet.json\n\n## Other comparisons with Groundmail API + MCP or Mailjet API + MCP\n\n- [AhaSend API + MCP vs Groundmail API + MCP](https://www.anchorterminal.com/compare/ahasend-vs-groundmail.md)\n- [AhaSend API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/ahasend-vs-mailjet.md)\n- [Amazon SES vs Groundmail API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-groundmail.md)\n- [Amazon SES vs Mailjet API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-mailjet.md)\n- [Brevo API + MCP vs Groundmail API + MCP](https://www.anchorterminal.com/compare/brevo-vs-groundmail.md)\n- [Brevo API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailjet.md)\n- [Cloudflare Email Service vs Groundmail API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-groundmail.md)\n- [Cloudflare Email Service vs Mailjet API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailjet.md)\n- [Groundmail API + MCP vs Loops API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-loops.md)\n- [Groundmail API + MCP vs MailerSend](https://www.anchorterminal.com/compare/groundmail-vs-mailersend.md)\n- [Groundmail API + MCP vs Mailgun API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-mailgun.md)\n- [Groundmail API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-mailtrap.md)\n- [Groundmail API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/groundmail-vs-mandrill.md)\n- [Groundmail API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-postmark.md)\n- [Groundmail API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-resend.md)\n- [Groundmail API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/groundmail-vs-sendgrid.md)\n- [Groundmail API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-smtp2go.md)\n- [Groundmail API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail.md)\n- [Loops API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailjet.md)\n- [MailerSend vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailjet.md)\n- [Mailgun API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-mailjet.md)\n- [Mailjet API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-mailtrap.md)\n- [Mailjet API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailjet-vs-mandrill.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",
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