{
  "data": {
    "a": {
      "slug": "mailersend",
      "name": "MailerSend",
      "vendor": "MailerSend, Inc.",
      "vendorUrl": "https://www.mailersend.com",
      "kind": "http-api",
      "category": "email",
      "summary": "Transactional email service from MailerSend, Inc. with a REST API, SMTP relay, templates, inbound routing, webhooks and analytics, plus SMS and WhatsApp sending. Agents reach it with a scoped API token or through a hosted MCP server.",
      "url": "https://www.anchorterminal.com/tools/mailersend",
      "markdownUrl": "https://www.anchorterminal.com/tools/mailersend.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mailersend.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mailersend.json",
      "repo": "https://github.com/mailersend/mailersend-nodejs",
      "license": "Proprietary service under MailerSend's terms of use. The SDKs and the CLI on GitHub are MIT",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.mailersend.com/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "mailersend"
        },
        {
          "registry": "pypi",
          "name": "mailersend"
        }
      ],
      "auth": "mixed",
      "authNotes": "The REST API takes a Bearer API token, created in the dashboard or through /v1/token, with any of 30 scopes and an optional sending domain. Tokens can be paused and deleted. SMTP relay uses separate SMTP users. The MCP server and the CLI use OAuth with a browser login, and the MCP authorisation server supports dynamic client registration and PKCE. Access is self-serve, but a new account passes an approval step before full sending.",
      "pricing": "freemium",
      "pricingNotes": "Free plan with 500 emails a month and 100 API requests a day, which the pricing FAQ says needs a card once the account is approved. A 14-day Professional trial starts at signup with the same limits. Hobby is $7 a month for 5,000 emails, Starter from $35 for 50,000 and Professional from $110 for 50,000, with overage of $0.50 to $1.50 per 1,000. Yearly billing takes 10 per cent off. Enterprise is priced by sales (https://www.mailersend.com/pricing, checked 2026-10-08).",
      "priceSummary": "$7 / 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": 127,
      "popularity": {
        "githubStars": 175,
        "npmWeekly": 128453,
        "pypiWeekly": 15086,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://developers.mailersend.com",
      "llmsTxt": "https://developers.mailersend.com/llms.txt",
      "openapi": "https://api.swaggerhub.com/apis/MailerSend/mailersend-api/1.0.0-oas3.1",
      "capabilities": [
        "email.send",
        "email.inbound",
        "email.templates",
        "email.domains",
        "email.analytics",
        "email.verification",
        "email.threads",
        "messaging.sms",
        "messaging.whatsapp"
      ],
      "tags": [
        "hosted",
        "freemium",
        "mcp",
        "oauth",
        "openapi",
        "llms-txt",
        "typescript",
        "python",
        "webhooks",
        "sms",
        "whatsapp",
        "status-page",
        "sla"
      ],
      "lastRelease": "2026-09-29",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 69.5,
        "grade": "B",
        "agentReady": false,
        "rank": 156,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 3,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 69,
          "maintenance": 83,
          "payments": 30,
          "reliability": 95,
          "schema": 73,
          "security": 62,
          "transparency": 64
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "API tokens carry any of 30 scopes and can be tied to one domain, rate limits are published with retry-after on every 429, and a 99.5 per cent SLA starts on the $35 Starter plan. Sends take no idempotency key, the Free plan allows 100 API requests a day, and the terms permit changes without notice.",
        "bestFor": "An agent sending transactional email for an owner who wants scoped tokens, a hosted MCP server and low entry prices, with SMS and WhatsApp on the same API.",
        "strengths": [
          "API tokens take any of 30 scopes, read or full by area, and can be limited to one sending domain",
          "Rate limits published per endpoint, with retry-after and x-ratelimit headers on a 429 and a quota endpoint that isn't counted",
          "99.5 per cent monthly uptime SLA with service credits on Starter, Professional and Enterprise",
          "Hosted MCP server at mcp.mailersend.com with OAuth, PKCE and dynamic client registration, on every plan",
          "Overage published per 1,000 emails for each plan, from $1.50 on Hobby to $0.50 at 2 million on Professional"
        ],
        "weaknesses": [
          "No idempotency key documented for POST /v1/email or the bulk endpoint",
          "Free plan is capped at 100 API requests a day and 500 emails a month, and asks for a card after account approval",
          "The terms allow MailerSend to change or end the service and the terms without notice, and to close an account without cause",
          "The MCP server lists 127 tools with no documented toolsets or read-only mode",
          "The public OpenAPI file has one-line summaries, no error responses, and no WhatsApp, DMARC or blocklist monitoring paths",
          "The terms grant MailerSend a licence to use inputs and outputs of its AI functions to improve AI models"
        ],
        "agentNotes": [
          "Send `Authorization: Bearer \u003ctoken\u003e` to https://api.mailersend.com/v1 and ask for a token with only the scopes the task needs, such as `email_full` and `activity_read`",
          "Read the message id from the `x-message-id` response header. POST /v1/email answers 202 with an empty body",
          "Check for a sent message before retrying a send. No idempotency key exists, so a blind retry can deliver twice",
          "On a 429 wait the seconds in `retry-after`. Call GET /v1/api-quota, which isn't counted, to see the daily quota left",
          "Use POST /v1/bulk-email for batches of up to 500 emails. It isn't on the Free plan and takes 10 to 60 requests a minute by plan"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 69.5
          }
        ],
        "editorialScores": {
          "ergonomics": 69,
          "maintenance": 83,
          "payments": 30,
          "reliability": 95,
          "schema": 73,
          "security": 62,
          "transparency": 43
        },
        "provenanceScore": 84
      },
      "connect": {
        "install": "npm install mailersend",
        "http": "curl -X POST https://api.mailersend.com/v1/email -H \"Authorization: Bearer $MAILERSEND_API_TOKEN\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"from\":{\"email\":\"hello@yourdomain.com\"},\"to\":[{\"email\":\"recipient@example.com\"}],\"subject\":\"Hello\",\"text\":\"Hello\"}'",
        "claudeCode": "claude mcp add --transport http mailersend https://mcp.mailersend.com/mcp"
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/mailersend"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Hobby",
          "unit": "month",
          "usd": 7,
          "note": "5,000 emails"
        },
        {
          "item": "Starter 50k",
          "unit": "month",
          "usd": 35,
          "note": "50,000 emails"
        },
        {
          "item": "Starter 100k",
          "unit": "month",
          "usd": 68,
          "note": "100,000 emails"
        },
        {
          "item": "Professional 50k",
          "unit": "month",
          "usd": 110,
          "note": "50,000 emails"
        },
        {
          "item": "Professional 100k",
          "unit": "month",
          "usd": 140,
          "note": "100,000 emails"
        },
        {
          "item": "Overage on Hobby",
          "unit": "1k-emails",
          "usd": 1.5
        },
        {
          "item": "Overage on Starter",
          "unit": "1k-emails",
          "usd": 1.3,
          "note": "up to the 100,000 tier, $1.10 at 250,000 and 500,000, $1.00 at 1 million"
        },
        {
          "item": "Overage on Professional",
          "unit": "1k-emails",
          "usd": 1.3,
          "note": "up to the 100,000 tier, falling to $0.50 at 2 million"
        },
        {
          "item": "Email verification credit",
          "unit": "credit",
          "usd": 0.01,
          "note": "1,000 credits for $10, falling to $0.002 at 1 million"
        },
        {
          "item": "Extra sending domain",
          "unit": "month",
          "usd": 4,
          "note": "per domain, Starter and above"
        },
        {
          "item": "SMS phone number",
          "unit": "month",
          "usd": 2,
          "note": "per number, USA and Canada, Starter and above"
        }
      ],
      "provenance": {
        "legalEntity": "MailerSend, Inc.",
        "domain": "mailersend.com",
        "domainRegistered": "2009-11-12",
        "endpointOnVendorDomain": true,
        "terms": "https://www.mailersend.com/legal/terms-of-use",
        "privacy": "https://www.mailersend.com/legal/privacy-policy",
        "statusPage": "https://status.mailersend.com",
        "changelog": "https://www.mailersend.com/whats-new",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The terms of use (last updated 5 October 2026) and the privacy policy (last updated 17 September 2026) both name MailerSend, Inc., 228 Park Ave S, PMB 54955, New York, NY 10003-1502. The terms of use are the agreement for the service, with Delaware law.",
          "The API answers at api.mailersend.com and the MCP server at mcp.mailersend.com.",
          "www.mailersend.com/.well-known/security.txt returned 404. The legal index links a responsible disclosure programme page.",
          "The changelog address comes from the site's llms.txt. The page itself was not read, because www.mailersend.com began answering with a Cloudflare bot check during our reads.",
          "RDAP gives 2009-11-12 as the registration date of mailersend.com.",
          "The lead named MailerLite and Vercom as parents. The pages we read name only MailerSend, Inc., so no parent is recorded."
        ],
        "score": 84
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/mailersend.json",
      "live": {
        "slug": "mailersend",
        "probe": {
          "target": "https://api.mailersend.com/v1",
          "method": "get",
          "lastAt": "2026-10-08T23:09:12.099113397Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 157,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 163,
          "p95ms24h": 279,
          "samples24h": 61,
          "samples30d": 61,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 61,
              "ok": 61
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.mailersend.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T23:13:33.374459826Z"
        },
        "pages": [
          {
            "url": "https://www.mailersend.com/whats-new",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:29:00.187031888Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "573c2146c8b3"
          },
          {
            "url": "https://www.mailersend.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:28:58.024689641Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "c5c6c75fb124"
          },
          {
            "url": "https://www.mailersend.com/legal/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:28:53.837822012Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "be735fa80c7c"
          },
          {
            "url": "https://www.mailersend.com/legal/terms-of-use",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:28:56.046015705Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "7fff1960a381"
          }
        ],
        "updatedAt": "2026-10-08T23:13:33.374459826Z"
      }
    },
    "answer": "MailerSend scores 69.5 (B) on agent readiness against Postmark API + MCP's 66.5 (B), and leads in 2 of 7 scored categories. Postmark API + MCP leads on schema \u0026 documentation, agent ergonomics, payments \u0026 pricing and transparency \u0026 trust.",
    "b": {
      "slug": "postmark",
      "name": "Postmark API + MCP",
      "vendor": "Postmark (ActiveCampaign)",
      "vendorUrl": "https://postmarkapp.com",
      "kind": "http-api",
      "category": "email",
      "summary": "Transactional email API with separate broadcast streams, templates, inbound parsing and bounce handling.",
      "url": "https://www.anchorterminal.com/tools/postmark",
      "markdownUrl": "https://www.anchorterminal.com/tools/postmark.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/postmark.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/postmark.json",
      "repo": "https://github.com/ActiveCampaign/postmark-mcp",
      "license": "MIT",
      "transports": [
        "http",
        "stdio"
      ],
      "remoteUrl": "https://api.postmarkapp.com",
      "packages": [
        {
          "registry": "npm",
          "name": "postmark"
        },
        {
          "registry": "npm",
          "name": "@activecampaign/postmark-mcp"
        }
      ],
      "auth": "api-key",
      "authNotes": "Server API token in the `X-Postmark-Server-Token` header for sending and per-server calls, and a separate `X-Postmark-Account-Token` for account-level calls. The token `POSTMARK_API_TEST` accepts requests without sending. The MCP server reads the server token from `POSTMARK_SERVER_TOKEN`.",
      "pricing": "freemium",
      "pricingNotes": "Free Developer plan with 100 emails a month, no overages and no expiry. At 10,000 emails a month Basic is $15, Pro $16.50 and Platform $18, with overage $1.80, $1.30 and $1.20 per 1,000. Pro at 125,000 is $126.50 and at 1,500,000 is $852.50. Sent and received emails both count. Dedicated IPs $50 a month from 300,000 emails a month, DMARC monitoring $14 a month per domain (https://postmarkapp.com/pricing).",
      "priceSummary": "$15 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in docs, pricing or MCP README (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 24,
      "popularity": {
        "githubStars": 57,
        "npmWeekly": 1281479,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://postmarkapp.com/developer",
      "llmsTxt": "https://postmarkapp.com/llms.txt",
      "capabilities": [
        "email.send",
        "email.inbound",
        "email.templates",
        "email.domains",
        "email.analytics",
        "email.marketing"
      ],
      "tags": [
        "hosted",
        "freemium",
        "no-card",
        "mcp",
        "llms-txt",
        "typescript",
        "webhooks"
      ],
      "lastRelease": "2026-08-12",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 66.5,
        "grade": "B",
        "agentReady": false,
        "rank": 235,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 6,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 79,
          "maintenance": 65,
          "payments": 40,
          "reliability": 60,
          "schema": 81,
          "security": 63,
          "transparency": 77
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "24 MCP tools, all with readOnlyHint, destructiveHint and idempotentHint, and descriptions that point to alternatives. No OpenAPI spec and no published request-rate limit.",
        "bestFor": "Transactional mail where deliverability and a small, well-annotated MCP matter more than a free tier.",
        "strengths": [
          "24 MCP tools, all with readOnlyHint, destructiveHint and idempotentHint, and descriptions that point to alternatives",
          "Prompt-injection guidance and a webhook URL allowlist in the MCP README",
          "45-day retention by default, two named subprocessors and a DPA in the terms",
          "Per-1,000 overage rates published for every plan",
          "IP allowlisting for API sending since 27 August 2026"
        ],
        "weaknesses": [
          "No OpenAPI spec and no published request-rate limit",
          "Manual account approval before sending outside your own domains",
          "No SOC 2, ISO 27001, disclosure policy or security.txt found for Postmark itself",
          "Webhooks aren't HMAC-signed",
          "The MCP server runs locally only and its repository has no CI"
        ],
        "agentNotes": [
          "Install @activecampaign/postmark-mcp, never the unscoped postmark-mcp package",
          "Use the token `POSTMARK_API_TEST` to check a payload without sending",
          "Set `MessageStream` to `outbound` for transactional mail and a broadcast stream for bulk",
          "Set `WEBHOOK_URL_ALLOWLIST` so a misled createWebhook call can't send events to someone else's server",
          "Keep `count + offset` under 10,000 on message and bounce searches"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 66.5
          }
        ],
        "editorialScores": {
          "ergonomics": 79,
          "maintenance": 65,
          "payments": 40,
          "reliability": 60,
          "schema": 81,
          "security": 63,
          "transparency": 69
        },
        "provenanceScore": 85
      },
      "connect": {
        "http": "curl https://api.postmarkapp.com/email -H \"Accept: application/json\" \\\n  -H \"Content-Type: application/json\" -H \"X-Postmark-Server-Token: $POSTMARK_SERVER_TOKEN\" \\\n  -d '{\"From\":\"sender@example.com\",\"To\":\"receiver@example.com\",\"Subject\":\"Hello\",\"TextBody\":\"Hello\",\"MessageStream\":\"outbound\"}'",
        "config": {
          "mcpServers": {
            "postmark": {
              "args": [
                "-y",
                "@activecampaign/postmark-mcp"
              ],
              "command": "npx",
              "env": {
                "DEFAULT_MESSAGE_STREAM": "outbound",
                "DEFAULT_SENDER_EMAIL": "${DEFAULT_SENDER_EMAIL}",
                "POSTMARK_SERVER_TOKEN": "${POSTMARK_SERVER_TOKEN}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/postmark"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Basic 10k",
          "unit": "month",
          "usd": 15,
          "note": "10,000 emails"
        },
        {
          "item": "Pro 10k",
          "unit": "month",
          "usd": 16.5,
          "note": "10,000 emails"
        },
        {
          "item": "Platform 10k",
          "unit": "month",
          "usd": 18,
          "note": "10,000 emails"
        },
        {
          "item": "Pro 125k",
          "unit": "month",
          "usd": 126.5,
          "note": "125,000 emails"
        },
        {
          "item": "Overage on Basic",
          "unit": "1k-emails",
          "usd": 1.8
        },
        {
          "item": "Overage on Pro",
          "unit": "1k-emails",
          "usd": 1.3
        },
        {
          "item": "Overage on Platform",
          "unit": "1k-emails",
          "usd": 1.2
        },
        {
          "item": "Dedicated IP",
          "unit": "month",
          "usd": 50,
          "note": "per IP, from 300,000 emails a month"
        }
      ],
      "provenance": {
        "legalEntity": "AC PM, LLC",
        "domain": "postmarkapp.com",
        "domainRegistered": "2009-05-25",
        "endpointOnVendorDomain": true,
        "terms": "https://postmarkapp.com/terms-of-service",
        "privacy": "https://www.activecampaign.com/legal/privacy-policy",
        "statusPage": "https://status.postmarkapp.com",
        "changelog": "https://postmarkapp.com/updates",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "AC PM, LLC is ActiveCampaign's Postmark entity. postmarkapp.com/privacy-policy redirects to ActiveCampaign's privacy policy."
        ],
        "score": 85
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/postmark.json",
      "live": {
        "slug": "postmark",
        "probe": {
          "target": "https://api.postmarkapp.com",
          "method": "get",
          "lastAt": "2026-10-08T23:09:16.130822927Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 594,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 99.63,
          "p50ms24h": 588,
          "p95ms24h": 690,
          "samples24h": 269,
          "samples30d": 2177,
          "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": 265
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 271
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 259,
              "ok": 259
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.postmarkapp.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-08T19:39:04.74603919Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "ActiveCampaign/postmark-mcp",
            "version": "v2.1.1",
            "released": "2026-07-13",
            "seenAt": "2026-10-08T16:26:14.34528549Z"
          },
          {
            "registry": "npm",
            "name": "@activecampaign/postmark-mcp",
            "version": "2.1.1",
            "seenAt": "2026-10-08T16:26:13.064671382Z"
          },
          {
            "registry": "npm",
            "name": "postmark",
            "version": "5.1.0",
            "seenAt": "2026-10-08T16:26:12.116674057Z"
          }
        ],
        "githubStars": 57,
        "npmWeekly": 1396221,
        "securityTxt": {
          "url": "https://postmarkapp.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:39:01.582221748Z"
        },
        "llmsTxt": {
          "url": "https://postmarkapp.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:47.172289518Z"
        },
        "domain": {
          "domain": "postmarkapp.com",
          "registered": "2009-05-25",
          "source": "https://rdap.verisign.com/com/v1/domain/postmarkapp.com",
          "checkedAt": "2026-10-04T13:05:40.955344563Z"
        },
        "pages": [
          {
            "url": "https://postmarkapp.com/updates",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:23:18.086154534Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "66f896f3e4fd"
          },
          {
            "url": "https://postmarkapp.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:23:13.944428468Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "7df8d73d2376"
          },
          {
            "url": "https://www.activecampaign.com/legal/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-07T18:10:31.997529995Z",
            "changedAt": "2026-10-02T15:25:06.170575042Z",
            "fingerprint": "3ba14f859de2"
          },
          {
            "url": "https://postmarkapp.com/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:23:16.207518846Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "92e20985dde5"
          }
        ],
        "updatedAt": "2026-10-08T23:09:16.130822927Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "MailerSend, Inc.",
        "b": "Postmark (ActiveCampaign)",
        "name": "Vendor"
      },
      {
        "a": "https://api.mailersend.com/v1",
        "b": "https://api.postmarkapp.com",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable HTTP",
        "b": "HTTP, stdio",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "$4 per month (plan)",
        "b": "not published",
        "name": "Price for email send"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under MailerSend's terms of use. The SDKs and the CLI on GitHub are MIT",
        "b": "MIT",
        "name": "Licence"
      },
      {
        "a": "127",
        "b": "24",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-09-29",
        "b": "2026-08-12",
        "name": "Last release"
      },
      {
        "a": "2026-10-05",
        "b": "2024-12-10",
        "name": "Terms last updated"
      },
      {
        "a": "2026-09-17",
        "b": "2026-10-01",
        "name": "Privacy policy last updated"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Customer content may train models"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "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": "175 stars, 128k npm/wk, 15k PyPI/wk",
        "b": "57 stars, 1.3M npm/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "3/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "MailerSend scores 69.5 (B) on agent readiness against Postmark API + MCP's 66.5 (B), and leads in 2 of 7 scored categories. Postmark API + MCP leads on schema \u0026 documentation, agent ergonomics, payments \u0026 pricing and transparency \u0026 trust.",
        "question": "Which is better for AI agents, MailerSend or Postmark API + MCP?"
      },
      {
        "answer": "MailerSend takes an API key or an OAuth sign-in. Postmark API + MCP needs an API key.",
        "question": "Do MailerSend and Postmark API + MCP need an API key?"
      },
      {
        "answer": "Yes. MailerSend has a hosted endpoint at https://api.mailersend.com/v1 and Postmark API + MCP at https://api.postmarkapp.com.",
        "question": "Can an agent call MailerSend and Postmark API + MCP without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 95 against 60",
          "Maintenance \u0026 community, 83 against 65"
        ],
        "also": null,
        "goodFor": "An agent sending transactional email for an owner who wants scoped tokens, a hosted MCP server and low entry prices, with SMS and WhatsApp on the same API.",
        "slug": "mailersend",
        "watchFor": "No idempotency key documented for POST /v1/email or the bulk endpoint"
      },
      {
        "aheadOn": [
          "Schema \u0026 documentation, 81 against 73",
          "Agent ergonomics, 79 against 69",
          "Payments \u0026 pricing, 40 against 30",
          "Transparency \u0026 trust, 77 against 64"
        ],
        "also": [
          "Runs on your own machine",
          "Free to start without a card"
        ],
        "goodFor": "Transactional mail where deliverability and a small, well-annotated MCP matter more than a free tier.",
        "slug": "postmark",
        "watchFor": "No OpenAPI spec and no published request-rate limit"
      }
    ],
    "job": {
      "capability": "email.send",
      "name": "Email send"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/amazon-ses-vs-mailersend.json",
        "title": "Amazon SES vs MailerSend",
        "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-mailersend"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amazon-ses-vs-postmark.json",
        "title": "Amazon SES vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/brevo-vs-mailersend.json",
        "title": "Brevo API + MCP vs MailerSend",
        "url": "https://www.anchorterminal.com/compare/brevo-vs-mailersend"
      },
      {
        "json": "https://www.anchorterminal.com/compare/brevo-vs-postmark.json",
        "title": "Brevo API + MCP vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/brevo-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailersend.json",
        "title": "Cloudflare Email Service vs MailerSend",
        "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailersend"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-postmark.json",
        "title": "Cloudflare Email Service vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/loops-vs-mailersend.json",
        "title": "Loops API + MCP vs MailerSend",
        "url": "https://www.anchorterminal.com/compare/loops-vs-mailersend"
      },
      {
        "json": "https://www.anchorterminal.com/compare/loops-vs-postmark.json",
        "title": "Loops API + MCP vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/loops-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-mailgun.json",
        "title": "MailerSend vs Mailgun API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-mailgun"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-mailjet.json",
        "title": "MailerSend vs Mailjet API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-mailjet"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-mailtrap.json",
        "title": "MailerSend vs Mailtrap Email API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-mailtrap"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-mandrill.json",
        "title": "MailerSend vs Mailchimp Transactional (Mandrill)",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-mandrill"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-resend.json",
        "title": "MailerSend vs Resend API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-resend"
      },
      {
        "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/mailersend-vs-smtp2go.json",
        "title": "MailerSend vs SMTP2GO API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-smtp2go"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.json",
        "title": "MailerSend vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailgun-vs-postmark.json",
        "title": "Mailgun API + MCP vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailgun-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailjet-vs-postmark.json",
        "title": "Mailjet API + MCP vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailjet-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailtrap-vs-postmark.json",
        "title": "Mailtrap Email API + MCP vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailtrap-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mandrill-vs-postmark.json",
        "title": "Mailchimp Transactional (Mandrill) vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/mandrill-vs-postmark"
      },
      {
        "json": "https://www.anchorterminal.com/compare/postmark-vs-resend.json",
        "title": "Postmark API + MCP vs Resend API + MCP",
        "url": "https://www.anchorterminal.com/compare/postmark-vs-resend"
      },
      {
        "json": "https://www.anchorterminal.com/compare/postmark-vs-sendgrid.json",
        "title": "Postmark API + MCP vs Twilio SendGrid",
        "url": "https://www.anchorterminal.com/compare/postmark-vs-sendgrid"
      },
      {
        "json": "https://www.anchorterminal.com/compare/postmark-vs-smtp2go.json",
        "title": "Postmark API + MCP vs SMTP2GO API + MCP",
        "url": "https://www.anchorterminal.com/compare/postmark-vs-smtp2go"
      },
      {
        "json": "https://www.anchorterminal.com/compare/postmark-vs-zoho-zeptomail.json",
        "title": "Postmark API + MCP vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/postmark-vs-zoho-zeptomail"
      }
    ],
    "scores": [
      {
        "by": 35,
        "edge": "mailersend",
        "key": "reliability",
        "mailersend": 95,
        "name": "Reliability",
        "postmark": 60,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 8,
        "edge": "postmark",
        "key": "schema",
        "mailersend": 73,
        "name": "Schema \u0026 documentation",
        "postmark": 81,
        "weight": 13
      },
      {
        "by": 10,
        "edge": "postmark",
        "key": "ergonomics",
        "mailersend": 69,
        "name": "Agent ergonomics",
        "postmark": 79,
        "weight": 13
      },
      {
        "by": 1,
        "edge": "postmark",
        "key": "security",
        "mailersend": 62,
        "name": "Security \u0026 auth",
        "postmark": 63,
        "weight": 14
      },
      {
        "by": 10,
        "edge": "postmark",
        "key": "payments",
        "mailersend": 30,
        "name": "Payments \u0026 pricing",
        "postmark": 40,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 18,
        "edge": "mailersend",
        "key": "maintenance",
        "mailersend": 83,
        "name": "Maintenance \u0026 community",
        "postmark": 65,
        "weight": 7
      },
      {
        "by": 13,
        "edge": "postmark",
        "key": "transparency",
        "mailersend": 64,
        "name": "Transparency \u0026 trust",
        "postmark": 77,
        "weight": 7
      }
    ],
    "summary": "MailerSend scores 69.5 (B) on agent readiness against Postmark API + MCP's 66.5 (B), and leads in 2 of 7 scored categories. Postmark API + MCP leads on schema \u0026 documentation, agent ergonomics, payments \u0026 pricing and transparency \u0026 trust. Both do email send.",
    "verdicts": {
      "mailersend": "API tokens carry any of 30 scopes and can be tied to one domain, rate limits are published with retry-after on every 429, and a 99.5 per cent SLA starts on the $35 Starter plan. Sends take no idempotency key, the Free plan allows 100 API requests a day, and the terms permit changes without notice.",
      "postmark": "24 MCP tools, all with readOnlyHint, destructiveHint and idempotentHint, and descriptions that point to alternatives. No OpenAPI spec and no published request-rate limit."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/mailersend-vs-postmark",
    "json": "https://www.anchorterminal.com/compare/mailersend-vs-postmark.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/mailersend-vs-postmark.md",
    "slim": "https://www.anchorterminal.com/compare/mailersend-vs-postmark.min.md"
  },
  "markdown": "MailerSend scores 69.5 (B) on agent readiness against Postmark API + MCP's 66.5 (B), and leads in 2 of 7 scored categories. Postmark API + MCP leads on schema \u0026 documentation, agent ergonomics, payments \u0026 pricing and transparency \u0026 trust. Both do email send.\n\n- MailerSend: grade B, 69.5/100, rank #156 of 722. Markdown https://www.anchorterminal.com/tools/mailersend.md · JSON https://www.anchorterminal.com/api/v1/tools/mailersend.json\n- Postmark API + MCP: grade B, 66.5/100, rank #235 of 722. Markdown https://www.anchorterminal.com/tools/postmark.md · JSON https://www.anchorterminal.com/api/v1/tools/postmark.json\n\n## Which one, for what\n\n### MailerSend (B)\n\nGood for: An agent sending transactional email for an owner who wants scoped tokens, a hosted MCP server and low entry prices, with SMS and WhatsApp on the same API.\n\nAhead on:\n- Reliability, 95 against 60\n- Maintenance \u0026 community, 83 against 65\n\nWatch for: No idempotency key documented for POST /v1/email or the bulk endpoint\n\n### Postmark API + MCP (B)\n\nGood for: Transactional mail where deliverability and a small, well-annotated MCP matter more than a free tier.\n\nAhead on:\n- Schema \u0026 documentation, 81 against 73\n- Agent ergonomics, 79 against 69\n- Payments \u0026 pricing, 40 against 30\n- Transparency \u0026 trust, 77 against 64\n\nAlso in its favour:\n- Runs on your own machine\n- Free to start without a card\n\nWatch for: No OpenAPI spec and no published request-rate limit\n\n\n## Score by category\n\n| Category | Weight | MailerSend | Postmark API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 95 | 60 | MailerSend +35 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 73 | 81 | Postmark API + MCP +8 |\n| Agent ergonomics | 13% (16.2 this run) | 69 | 79 | Postmark API + MCP +10 |\n| Security \u0026 auth | 14% (17.5 this run) | 62 | 63 | Postmark API + MCP +1 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 40 | Postmark API + MCP +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 65 | MailerSend +18 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 64 | 77 | Postmark API + MCP +13 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **69.5 · B** | **66.5 · B** | |\n\n## Facts side by side\n\n| Fact | MailerSend | Postmark API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | MailerSend, Inc. | Postmark (ActiveCampaign) |\n| Hosted endpoint | `https://api.mailersend.com/v1` | `https://api.postmarkapp.com` |\n| Transports | HTTP, Streamable HTTP | HTTP, stdio |\n| Auth | OAuth or key | API key |\n| Pricing | Freemium | Freemium |\n| Price for email send | $4 per month (plan) | not published |\n| x402 | no | no |\n| Licence | Proprietary service under MailerSend's terms of use. The SDKs and the CLI on GitHub are MIT | MIT |\n| Tools exposed | 127 | 24 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-29 | 2026-08-12 |\n| Terms last updated | 2026-10-05 | 2024-12-10 |\n| Privacy policy last updated | 2026-09-17 | 2026-10-01 |\n| Customer content may train models | yes | yes |\n| Terms restrict automated access | not found in the text | yes |\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 | 175 stars, 128k npm/wk, 15k PyPI/wk | 57 stars, 1.3M npm/wk |\n| Agent reviews | none | 3/5 (2) |\n\n## Verdicts\n\n**MailerSend.** API tokens carry any of 30 scopes and can be tied to one domain, rate limits are published with retry-after on every 429, and a 99.5 per cent SLA starts on the $35 Starter plan. Sends take no idempotency key, the Free plan allows 100 API requests a day, and the terms permit changes without notice.\n\n**Postmark API + MCP.** 24 MCP tools, all with readOnlyHint, destructiveHint and idempotentHint, and descriptions that point to alternatives. No OpenAPI spec and no published request-rate limit.\n\n## Before you call either\n\n### MailerSend\n\n1. Send `Authorization: Bearer \u003ctoken\u003e` to https://api.mailersend.com/v1 and ask for a token with only the scopes the task needs, such as `email_full` and `activity_read`\n2. Read the message id from the `x-message-id` response header. POST /v1/email answers 202 with an empty body\n3. Check for a sent message before retrying a send. No idempotency key exists, so a blind retry can deliver twice\n4. On a 429 wait the seconds in `retry-after`. Call GET /v1/api-quota, which isn't counted, to see the daily quota left\n5. Use POST /v1/bulk-email for batches of up to 500 emails. It isn't on the Free plan and takes 10 to 60 requests a minute by plan\n\n### Postmark API + MCP\n\n1. Install @activecampaign/postmark-mcp, never the unscoped postmark-mcp package\n2. Use the token `POSTMARK_API_TEST` to check a payload without sending\n3. Set `MessageStream` to `outbound` for transactional mail and a broadcast stream for bulk\n4. Set `WEBHOOK_URL_ALLOWLIST` so a misled createWebhook call can't send events to someone else's server\n5. Keep `count + offset` under 10,000 on message and bounce searches\n\n## Questions\n\n### Which is better for AI agents, MailerSend or Postmark API + MCP?\n\nMailerSend scores 69.5 (B) on agent readiness against Postmark API + MCP's 66.5 (B), and leads in 2 of 7 scored categories. Postmark API + MCP leads on schema \u0026 documentation, agent ergonomics, payments \u0026 pricing and transparency \u0026 trust.\n\n### Do MailerSend and Postmark API + MCP need an API key?\n\nMailerSend takes an API key or an OAuth sign-in. Postmark API + MCP needs an API key.\n\n### Can an agent call MailerSend and Postmark API + MCP without installing anything?\n\nYes. MailerSend has a hosted endpoint at https://api.mailersend.com/v1 and Postmark API + MCP at https://api.postmarkapp.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/mailersend-vs-postmark.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mailersend-vs-postmark.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mailersend\", \"b\": \"postmark\"}`. From a terminal: `anchor compare mailersend postmark`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mailersend.json and https://www.anchorterminal.com/api/v1/tools/postmark.json\n\n## Other comparisons with MailerSend or Postmark API + MCP\n\n- [Amazon SES vs MailerSend](https://www.anchorterminal.com/compare/amazon-ses-vs-mailersend.md)\n- [Amazon SES vs Postmark API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-postmark.md)\n- [Brevo API + MCP vs MailerSend](https://www.anchorterminal.com/compare/brevo-vs-mailersend.md)\n- [Brevo API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/brevo-vs-postmark.md)\n- [Cloudflare Email Service vs MailerSend](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailersend.md)\n- [Cloudflare Email Service vs Postmark API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-postmark.md)\n- [Loops API + MCP vs MailerSend](https://www.anchorterminal.com/compare/loops-vs-mailersend.md)\n- [Loops API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/loops-vs-postmark.md)\n- [MailerSend vs Mailgun API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailgun.md)\n- [MailerSend vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailjet.md)\n- [MailerSend vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailtrap.md)\n- [MailerSend vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailersend-vs-mandrill.md)\n- [MailerSend vs Resend API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-resend.md)\n- [MailerSend vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailersend-vs-sendgrid.md)\n- [MailerSend vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-smtp2go.md)\n- [MailerSend vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.md)\n- [Mailgun API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-postmark.md)\n- [Mailjet API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-postmark.md)\n- [Mailtrap Email API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailtrap-vs-postmark.md)\n- [Mailchimp Transactional (Mandrill) vs Postmark API + MCP](https://www.anchorterminal.com/compare/mandrill-vs-postmark.md)\n- [Postmark API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/postmark-vs-resend.md)\n- [Postmark API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/postmark-vs-sendgrid.md)\n- [Postmark API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/postmark-vs-smtp2go.md)\n- [Postmark API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/postmark-vs-zoho-zeptomail.md)\n",
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    "description": "MailerSend scores 69.5 (B) on agent readiness against Postmark API + MCP's 66.5 (B), and leads in 2 of 7 scored categories. Postmark API + MCP leads on schema \u0026 documentation, agent ergonomics, payments \u0026 pricing and transparency \u0026 trust. Both do email send. Category scores…",
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    "title": "MailerSend vs Postmark API + MCP for AI agents, B 69.5 vs B 66.5",
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