{
  "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": "2026-10-08T20:09:50.296394595Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 174,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 176,
          "p95ms24h": 297,
          "samples24h": 30,
          "samples30d": 30,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 30,
              "ok": 30
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.mailersend.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T20:01:08.407369444Z"
        },
        "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": "2026-10-08T20:09:50.296394595Z"
      }
    },
    "answer": "MailerSend scores 69.5 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 3 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on schema \u0026 documentation, security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust.",
    "b": {
      "slug": "zoho-zeptomail",
      "name": "Zoho CPaaS (formerly ZeptoMail)",
      "vendor": "Zoho Corporation",
      "vendorUrl": "https://www.zoho.com/cpaas/",
      "kind": "http-api",
      "category": "email",
      "summary": "Transactional email service from Zoho, renamed from ZeptoMail to Zoho CPaaS in September 2026. It sends application email through a REST API or SMTP relay, with templates, domain management, suppression lists, logs and webhooks.",
      "url": "https://www.anchorterminal.com/tools/zoho-zeptomail",
      "markdownUrl": "https://www.anchorterminal.com/tools/zoho-zeptomail.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/zoho-zeptomail.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/zoho-zeptomail.json",
      "license": "Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://cpaas.zoho.com/v1.1",
      "packages": [
        {
          "registry": "npm",
          "name": "zeptomail"
        }
      ],
      "auth": "mixed",
      "authNotes": "Sending takes a send key in the `Authorization` header with the prefix Zoho-enczapikey. Each Agent has its own keys, one set per channel, copied from the console's SMTP/API tab or created and deleted by API. Logs, domains, templates, agents and suppression lists take a Zoho OAuth 2.0 access token (authorisation code grant, one-hour tokens, refresh tokens) with per-resource scopes. Access is self-serve, but every new account passes a manual review that the docs say takes two business days.",
      "pricing": "usage",
      "pricingNotes": "$2.50 per email credit of 10,000 emails ($0.25 per 1,000), valid six months, counted per recipient. The first credit is free, and a sandbox Agent accepts 10,000 test emails a day without sending them. No monthly plan. Credits can be bought only after the account review. Dedicated IP $30 a month, billed annually. Prices are filled in by script from a public JSON file (https://www.zoho.com/cpaas/pricing.html).",
      "priceSummary": "$30 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the API docs, the OpenAPI file or the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 40110,
        "pypiWeekly": null,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://www.zoho.com/cpaas/help/api/api-home.html",
      "llmsTxt": "https://www.zoho.com/cpaas/llms.txt",
      "openapi": "https://www.zohowebstatic.com/sites/zweb/json/api/cpaas/oas.json",
      "capabilities": [
        "email.send",
        "email.templates",
        "email.domains",
        "email.analytics"
      ],
      "tags": [
        "hosted",
        "usage",
        "openapi",
        "llms-txt",
        "oauth",
        "smtp",
        "webhooks",
        "sandbox",
        "typescript",
        "status-page",
        "bug-bounty",
        "soc2"
      ],
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 61.8,
        "grade": "C",
        "agentReady": false,
        "rank": 356,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 10,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 55,
          "maintenance": 74,
          "payments": 40,
          "reliability": 41,
          "schema": 78,
          "security": 76,
          "transparency": 82
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "A public OpenAPI 3.0 file covers all 42 operations, and each Agent has its own send-only key. Email costs $2.50 per 10,000 with the first credit free. No API rate limit, 429 handling, idempotency key or SLA was found in the reviewed documentation, and new accounts wait for a manual review.",
        "bestFor": "Low-volume transactional senders who want prepaid credits without a monthly plan, and teams already on Zoho.",
        "strengths": [
          "Public OpenAPI 3.0.3 file with 42 operations, plus llms.txt and a Markdown copy of every help page",
          "Send keys are per Agent and per channel and can only send. Management calls use OAuth with READ, CREATE, UPDATE and DELETE scopes per resource",
          "Published price of $2.50 per credit of 10,000 emails, valid six months, with the first credit free",
          "IP allow lists for sending, the REST API and the web console, and activity logs kept for one year",
          "The terms commit to a six-month deprecation period for a retired API version"
        ],
        "weaknesses": [
          "No API rate limit, 429 behaviour or Retry-After was found in the reviewed documentation or the OpenAPI file",
          "No idempotency key on send. `client_reference` is a tracking label only",
          "Every new account is reviewed by Zoho staff, which the docs say takes two business days, before credits can be bought",
          "The only official SDK found is the Node package, last published on 29 May 2026 and still named zeptomail",
          "The OAuth guide puts the client secret and refresh token in the token URL's query string",
          "No inbound email, and no SLA was found"
        ],
        "agentNotes": [
          "Call the base URL for the account's region (cpaas.zoho.com, .eu, .in, .com.au, .jp or .com.cn). A key from one region fails on another",
          "Send with `Authorization: Zoho-enczapikey \u003ckey\u003e`. Logs, domains, templates, agents and suppressions need a Zoho OAuth token as `Authorization: Zoho-oauthtoken \u003ctoken\u003e`",
          "Post OAuth client secrets and refresh tokens in the request body, not the query string the guide shows, so they stay out of logs",
          "Don't retry a timed-out send blindly. There is no idempotency key, so look the message up by `client_reference` in the email logs first",
          "Count one email per recipient, including cc and bcc, and keep each address field to 500 entries and each attachment to 15 MB",
          "Use a sandbox Agent for tests. It accepts up to 10,000 emails a day and sends none of them"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 61.8
          }
        ],
        "editorialScores": {
          "ergonomics": 55,
          "maintenance": 74,
          "payments": 40,
          "reliability": 41,
          "schema": 78,
          "security": 76,
          "transparency": 69
        },
        "provenanceScore": 94
      },
      "connect": {
        "install": "npm install zeptomail",
        "http": "curl --request POST --url https://cpaas.zoho.com/v1.1/email \\\n  --header 'Authorization: Zoho-enczapikey REPLACE_WITH_YOUR_KEY' \\\n  --header 'content-type: application/json' \\\n  --data '{\"from\":{\"address\":\"hello@yourapp.com\",\"name\":\"Your App\"},\"to\":[{\"email_address\":{\"address\":\"user@example.com\",\"name\":\"User\"}}],\"subject\":\"Test Email\",\"htmlbody\":\"\u003cp\u003eTest email sent successfully.\u003c/p\u003e\"}'"
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/zoho-zeptomail"
      },
      "sameCompany": [
        "zoho-books",
        "zoho-crm",
        "zoho-recruit",
        "zoho-people"
      ],
      "area": "communication",
      "unitPrices": [
        {
          "item": "Email credit",
          "unit": "1k-emails",
          "usd": 0.25,
          "note": "$2.50 per credit of 10,000 emails, valid six months, counted per recipient. First credit free"
        },
        {
          "item": "Dedicated IP",
          "unit": "month",
          "usd": 30,
          "note": "Billed annually, some data centres only"
        }
      ],
      "provenance": {
        "legalEntity": "Zoho Corporation",
        "domain": "zoho.com",
        "domainRegistered": "2004-01-16",
        "endpointOnVendorDomain": true,
        "terms": "https://www.zoho.com/cpaas/terms.html",
        "privacy": "https://www.zoho.com/privacy.html",
        "statusPage": "https://us.zohostatus.com/",
        "changelog": "https://www.zoho.com/cpaas/whats-new.html",
        "securityTxt": "valid",
        "checked": "2026-10-08",
        "notes": [
          "The Zoho CPaaS terms of use name the contracting party as the Zoho entity for the customer's region. That is Zoho Corporation for the United States and Zoho Corporation Private Limited for India (https://www.zoho.com/legal/zoho-contracting-entities.html).",
          "The privacy field points at Zoho's privacy policy, last updated 22 December 2025, whose Part II covers the data customers process through Zoho services. Zoho CPaaS has no privacy policy of its own.",
          "status.zoho.com redirects to us.zohostatus.com, which lists Zepto Mail, Zepto Mail-SMTP and Zepto Mail-SMTP (PORT:465) under the old name. Other regions have their own status sites.",
          "www.zoho.com/.well-known/security.txt names security@zohocorp.com and the bug bounty, and expires on 30 June 2028. cpaas.zoho.com/.well-known/security.txt returns 403.",
          "RDAP for zoho.com gives a registration date of 2004-01-16."
        ],
        "score": 94
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/zoho-zeptomail.json",
      "live": {
        "slug": "zoho-zeptomail",
        "probe": {
          "target": "https://cpaas.zoho.com/v1.1",
          "method": "get",
          "lastAt": "2026-10-08T20:10:08.636956027Z",
          "lastOk": true,
          "lastStatus": 403,
          "lastMs": 469,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 433,
          "p95ms24h": 590,
          "samples24h": 30,
          "samples30d": 30,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 30,
              "ok": 30
            }
          ]
        },
        "vendorStatus": {
          "page": "https://us.zohostatus.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-08T19:39:22.469628831Z"
        },
        "pages": [
          {
            "url": "https://www.zoho.com/cpaas/whats-new.html",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:31:56.469057518Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "7bf282bb5347"
          },
          {
            "url": "https://www.zoho.com/cpaas/pricing.html",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:31:52.435007702Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "b4b0b9f913a0"
          },
          {
            "url": "https://www.zoho.com/cpaas/terms.html",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:31:54.470399117Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "a4fd5ba82732"
          }
        ],
        "updatedAt": "2026-10-08T20:10:08.636956027Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "MailerSend, Inc.",
        "b": "Zoho Corporation",
        "name": "Vendor"
      },
      {
        "a": "https://api.mailersend.com/v1",
        "b": "https://cpaas.zoho.com/v1.1",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Pay per use",
        "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": "Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT",
        "name": "Licence"
      },
      {
        "a": "127",
        "b": "none",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-09-29",
        "b": "none",
        "name": "Last release"
      },
      {
        "a": "2026-10-05",
        "b": "no date given",
        "name": "Terms last updated"
      },
      {
        "a": "2026-09-17",
        "b": "2025-12-22",
        "name": "Privacy policy last updated"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Customer content may train models"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "175 stars, 128k npm/wk, 15k PyPI/wk",
        "b": "40k npm/wk",
        "name": "Popularity"
      }
    ],
    "faq": [
      {
        "answer": "MailerSend scores 69.5 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 3 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on schema \u0026 documentation, security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust.",
        "question": "Which is better for AI agents, MailerSend or Zoho CPaaS (formerly ZeptoMail)?"
      },
      {
        "answer": "Both take an API key or an OAuth sign-in.",
        "question": "Do MailerSend and Zoho CPaaS (formerly ZeptoMail) need an API key?"
      },
      {
        "answer": "Yes. MailerSend has a hosted endpoint at https://api.mailersend.com/v1 and Zoho CPaaS (formerly ZeptoMail) at https://cpaas.zoho.com/v1.1.",
        "question": "Can an agent call MailerSend and Zoho CPaaS (formerly ZeptoMail) without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 95 against 41",
          "Agent ergonomics, 69 against 55",
          "Maintenance \u0026 community, 83 against 74"
        ],
        "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, 78 against 73",
          "Security \u0026 auth, 76 against 62",
          "Payments \u0026 pricing, 40 against 30",
          "Transparency \u0026 trust, 82 against 64"
        ],
        "also": null,
        "goodFor": "Low-volume transactional senders who want prepaid credits without a monthly plan, and teams already on Zoho.",
        "slug": "zoho-zeptomail",
        "watchFor": "No API rate limit, 429 behaviour or Retry-After was found in the reviewed documentation or the OpenAPI file"
      }
    ],
    "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-zoho-zeptomail.json",
        "title": "Amazon SES vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-zoho-zeptomail"
      },
      {
        "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-zoho-zeptomail.json",
        "title": "Brevo API + MCP vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/brevo-vs-zoho-zeptomail"
      },
      {
        "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-zoho-zeptomail.json",
        "title": "Cloudflare Email Service vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail"
      },
      {
        "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-zoho-zeptomail.json",
        "title": "Loops API + MCP vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail"
      },
      {
        "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-postmark.json",
        "title": "MailerSend vs Postmark API + MCP",
        "url": "https://www.anchorterminal.com/compare/mailersend-vs-postmark"
      },
      {
        "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/mailgun-vs-zoho-zeptomail.json",
        "title": "Mailgun API + MCP vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/mailgun-vs-zoho-zeptomail"
      },
      {
        "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"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail.json",
        "title": "Mailtrap Email API + MCP vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mandrill-vs-zoho-zeptomail.json",
        "title": "Mailchimp Transactional (Mandrill) vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/mandrill-vs-zoho-zeptomail"
      },
      {
        "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"
      },
      {
        "json": "https://www.anchorterminal.com/compare/resend-vs-zoho-zeptomail.json",
        "title": "Resend API + MCP vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/resend-vs-zoho-zeptomail"
      },
      {
        "json": "https://www.anchorterminal.com/compare/sendgrid-vs-zoho-zeptomail.json",
        "title": "Twilio SendGrid vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/sendgrid-vs-zoho-zeptomail"
      },
      {
        "json": "https://www.anchorterminal.com/compare/smtp2go-vs-zoho-zeptomail.json",
        "title": "SMTP2GO API + MCP vs Zoho CPaaS (formerly ZeptoMail)",
        "url": "https://www.anchorterminal.com/compare/smtp2go-vs-zoho-zeptomail"
      }
    ],
    "scores": [
      {
        "by": 54,
        "edge": "mailersend",
        "key": "reliability",
        "mailersend": 95,
        "name": "Reliability",
        "weight": 16,
        "zoho-zeptomail": 41
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 5,
        "edge": "zoho-zeptomail",
        "key": "schema",
        "mailersend": 73,
        "name": "Schema \u0026 documentation",
        "weight": 13,
        "zoho-zeptomail": 78
      },
      {
        "by": 14,
        "edge": "mailersend",
        "key": "ergonomics",
        "mailersend": 69,
        "name": "Agent ergonomics",
        "weight": 13,
        "zoho-zeptomail": 55
      },
      {
        "by": 14,
        "edge": "zoho-zeptomail",
        "key": "security",
        "mailersend": 62,
        "name": "Security \u0026 auth",
        "weight": 14,
        "zoho-zeptomail": 76
      },
      {
        "by": 10,
        "edge": "zoho-zeptomail",
        "key": "payments",
        "mailersend": 30,
        "name": "Payments \u0026 pricing",
        "weight": 10,
        "zoho-zeptomail": 40
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 9,
        "edge": "mailersend",
        "key": "maintenance",
        "mailersend": 83,
        "name": "Maintenance \u0026 community",
        "weight": 7,
        "zoho-zeptomail": 74
      },
      {
        "by": 18,
        "edge": "zoho-zeptomail",
        "key": "transparency",
        "mailersend": 64,
        "name": "Transparency \u0026 trust",
        "weight": 7,
        "zoho-zeptomail": 82
      }
    ],
    "summary": "MailerSend scores 69.5 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 3 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on schema \u0026 documentation, security \u0026 auth, 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.",
      "zoho-zeptomail": "A public OpenAPI 3.0 file covers all 42 operations, and each Agent has its own send-only key. Email costs $2.50 per 10,000 with the first credit free. No API rate limit, 429 handling, idempotency key or SLA was found in the reviewed documentation, and new accounts wait for a manual review."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail",
    "json": "https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.md",
    "slim": "https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.min.md"
  },
  "markdown": "MailerSend scores 69.5 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 3 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on schema \u0026 documentation, security \u0026 auth, 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- Zoho CPaaS (formerly ZeptoMail): grade C, 61.8/100, rank #356 of 722. Markdown https://www.anchorterminal.com/tools/zoho-zeptomail.md · JSON https://www.anchorterminal.com/api/v1/tools/zoho-zeptomail.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 41\n- Agent ergonomics, 69 against 55\n- Maintenance \u0026 community, 83 against 74\n\nWatch for: No idempotency key documented for POST /v1/email or the bulk endpoint\n\n### Zoho CPaaS (formerly ZeptoMail) (C)\n\nGood for: Low-volume transactional senders who want prepaid credits without a monthly plan, and teams already on Zoho.\n\nAhead on:\n- Schema \u0026 documentation, 78 against 73\n- Security \u0026 auth, 76 against 62\n- Payments \u0026 pricing, 40 against 30\n- Transparency \u0026 trust, 82 against 64\n\nWatch for: No API rate limit, 429 behaviour or Retry-After was found in the reviewed documentation or the OpenAPI file\n\n\n## Score by category\n\n| Category | Weight | MailerSend | Zoho CPaaS (formerly ZeptoMail) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 95 | 41 | MailerSend +54 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 73 | 78 | Zoho CPaaS (formerly ZeptoMail) +5 |\n| Agent ergonomics | 13% (16.2 this run) | 69 | 55 | MailerSend +14 |\n| Security \u0026 auth | 14% (17.5 this run) | 62 | 76 | Zoho CPaaS (formerly ZeptoMail) +14 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 40 | Zoho CPaaS (formerly ZeptoMail) +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 74 | MailerSend +9 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 64 | 82 | Zoho CPaaS (formerly ZeptoMail) +18 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **69.5 · B** | **61.8 · C** | |\n\n## Facts side by side\n\n| Fact | MailerSend | Zoho CPaaS (formerly ZeptoMail) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | MailerSend, Inc. | Zoho Corporation |\n| Hosted endpoint | `https://api.mailersend.com/v1` | `https://cpaas.zoho.com/v1.1` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Pay per use |\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 | Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT |\n| Tools exposed | 127 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-29 | none |\n| Terms last updated | 2026-10-05 | no date given |\n| Privacy policy last updated | 2026-09-17 | 2025-12-22 |\n| Customer content may train models | yes | yes |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | yes | not found in the text |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 175 stars, 128k npm/wk, 15k PyPI/wk | 40k npm/wk |\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**Zoho CPaaS (formerly ZeptoMail).** A public OpenAPI 3.0 file covers all 42 operations, and each Agent has its own send-only key. Email costs $2.50 per 10,000 with the first credit free. No API rate limit, 429 handling, idempotency key or SLA was found in the reviewed documentation, and new accounts wait for a manual review.\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### Zoho CPaaS (formerly ZeptoMail)\n\n1. Call the base URL for the account's region (cpaas.zoho.com, .eu, .in, .com.au, .jp or .com.cn). A key from one region fails on another\n2. Send with `Authorization: Zoho-enczapikey \u003ckey\u003e`. Logs, domains, templates, agents and suppressions need a Zoho OAuth token as `Authorization: Zoho-oauthtoken \u003ctoken\u003e`\n3. Post OAuth client secrets and refresh tokens in the request body, not the query string the guide shows, so they stay out of logs\n4. Don't retry a timed-out send blindly. There is no idempotency key, so look the message up by `client_reference` in the email logs first\n5. Count one email per recipient, including cc and bcc, and keep each address field to 500 entries and each attachment to 15 MB\n6. Use a sandbox Agent for tests. It accepts up to 10,000 emails a day and sends none of them\n\n## Questions\n\n### Which is better for AI agents, MailerSend or Zoho CPaaS (formerly ZeptoMail)?\n\nMailerSend scores 69.5 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 3 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on schema \u0026 documentation, security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust.\n\n### Do MailerSend and Zoho CPaaS (formerly ZeptoMail) need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call MailerSend and Zoho CPaaS (formerly ZeptoMail) without installing anything?\n\nYes. MailerSend has a hosted endpoint at https://api.mailersend.com/v1 and Zoho CPaaS (formerly ZeptoMail) at https://cpaas.zoho.com/v1.1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mailersend\", \"b\": \"zoho-zeptomail\"}`. From a terminal: `anchor compare mailersend zoho-zeptomail`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mailersend.json and https://www.anchorterminal.com/api/v1/tools/zoho-zeptomail.json\n\n## Other comparisons with MailerSend or Zoho CPaaS (formerly ZeptoMail)\n\n- [Amazon SES vs MailerSend](https://www.anchorterminal.com/compare/amazon-ses-vs-mailersend.md)\n- [Amazon SES vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/amazon-ses-vs-zoho-zeptomail.md)\n- [Brevo API + MCP vs MailerSend](https://www.anchorterminal.com/compare/brevo-vs-mailersend.md)\n- [Brevo API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/brevo-vs-zoho-zeptomail.md)\n- [Cloudflare Email Service vs MailerSend](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailersend.md)\n- [Cloudflare Email Service vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail.md)\n- [Loops API + MCP vs MailerSend](https://www.anchorterminal.com/compare/loops-vs-mailersend.md)\n- [Loops API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.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 Postmark API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-postmark.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- [Mailgun API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailgun-vs-zoho-zeptomail.md)\n- [Mailjet API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail.md)\n- [Mailtrap Email API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail.md)\n- [Mailchimp Transactional (Mandrill) vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mandrill-vs-zoho-zeptomail.md)\n- [Postmark API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/postmark-vs-zoho-zeptomail.md)\n- [Resend API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/resend-vs-zoho-zeptomail.md)\n- [Twilio SendGrid vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/sendgrid-vs-zoho-zeptomail.md)\n- [SMTP2GO API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/smtp2go-vs-zoho-zeptomail.md)\n",
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    "description": "MailerSend scores 69.5 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 3 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on schema \u0026 documentation, security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust. Both do email…",
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    "title": "MailerSend vs Zoho CPaaS (formerly ZeptoMail) for AI agents",
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