{ "data": { "a": { "slug": "mailjet", "name": "Mailjet API + MCP", "vendor": "Mailjet (Sinch)", "vendorUrl": "https://www.mailjet.com", "kind": "http-api", "category": "email", "summary": "Sinch-owned email API with Send API v3.1, SMTP relay, a Parse API for inbound mail, templates and a marketing editor.", "url": "https://www.anchorterminal.com/tools/mailjet", "markdownUrl": "https://www.anchorterminal.com/tools/mailjet.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mailjet.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mailjet.json", "repo": "https://github.com/mailjet/mailjet-apiv3-nodejs", "license": "MIT", "transports": [ "http", "stdio" ], "remoteUrl": "https://api.mailjet.com/v3.1", "packages": [ { "registry": "npm", "name": "node-mailjet" }, { "registry": "npm", "name": "@mailjet/mailjet-mcp-server" }, { "registry": "pypi", "name": "mailjet-rest" } ], "auth": "api-key", "authNotes": "HTTP Basic auth with the public API key as user and the secret key as password. The MCP server takes both as MAILJET_API_KEY in `key:secret` form, and MAILJET_API_REGION=eu switches to EU servers.", "pricing": "freemium", "pricingNotes": "Free 6,000 emails a month capped at 200 a day, no card. Starter $9 a month (8,000 emails), Essential $19 (15,000), Premium $29 (15,000), with prices rising by volume and 10 per cent off yearly. Emails over the plan are billed per extra 1,000 at a rate published in the help centre, which we couldn't read. Enterprise on quote (https://www.mailjet.com/pricing/).", "priceSummary": "$9 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402 or stablecoin payment path in docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": 117, "popularity": { "githubStars": 255, "npmWeekly": 177150, "pypiWeekly": 244633, "asOf": "2026-09-30" }, "docsUrl": "https://dev.mailjet.com", "llmsTxt": "https://dev.mailjet.com/llms.txt", "openapi": "https://dev.mailjet.com/_bundle/openapi/openapi-mailjet.yaml", "capabilities": [ "email.send", "email.inbound", "email.templates", "email.domains", "email.analytics", "email.marketing" ], "tags": [ "hosted", "freemium", "no-card", "mcp", "llms-txt", "openapi", "typescript", "python", "webhooks" ], "lastRelease": "2026-09-14", "graded": true, "anchor": { "graded": true, "score": 59.4, "grade": "C", "agentReady": false, "rank": 430, "ranked": true, "rankOf": 722, "categoryRank": 11, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 53, "maintenance": 79, "payments": 30, "reliability": 62, "schema": 76, "security": 52, "transparency": 72 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "SandboxMode on Send API v3.1 validates a payload without delivering it. The MCP server registers 117 GET-only tools and can't send.", "bestFor": "EU-based senders who want cheap transactional and marketing mail with data kept in the EU.", "strengths": [ "SandboxMode on Send API v3.1 validates a payload without delivering it", "Data stored on Google Cloud in Frankfurt and Saint-Ghislain", "Parse API routes inbound mail to a webhook", "OpenAPI files, llms.txt and Markdown pages", "Free plan of 6,000 emails a month with no card" ], "weaknesses": [ "The MCP server registers 117 GET-only tools and can't send", "No numeric rate limits published", "Price per extra 1,000 emails isn't on the pricing page", "No bug bounty, disclosure policy or security.txt found", "npm has MCP 1.1.0 while the git tags stop at a beta" ], "agentNotes": [ "Set `SandboxMode` to true on the first sends to check payloads without delivering", "Send with POST /v3.1/send and a `Messages` array, many messages per call", "Use the MCP for statistics and contact lookups only, since it can't send", "Pass `MAILJET_API_KEY` as `key:secret`. The server checks it at startup and exits if it's wrong", "On 429, wait and retry. Non-transactional endpoints have much lower limits than send" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 59.4 } ], "editorialScores": { "ergonomics": 53, "maintenance": 79, "payments": 30, "reliability": 62, "schema": 76, "security": 52, "transparency": 55 }, "provenanceScore": 89 }, "connect": { "http": "curl -X POST https://api.mailjet.com/v3.1/send --user \"$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE\" \\\n -H \"Content-Type: application/json\" -d '{\"Messages\":[{\"From\":{\"Email\":\"you@example.com\"},\"To\":[{\"Email\":\"them@example.com\"}],\"Subject\":\"Hello\",\"TextPart\":\"Hello from Mailjet\"}]}'", "claudeCode": "claude mcp add mailjet -e MAILJET_API_KEY=\"$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE\" -- npx -y @mailjet/mailjet-mcp-server", "config": { "mcpServers": { "mailjet": { "args": [ "-y", "@mailjet/mailjet-mcp-server" ], "command": "npx", "env": { "MAILJET_API_KEY": "${MJ_APIKEY_PUBLIC}:${MJ_APIKEY_PRIVATE}" } } } } }, "letme": { "capability": "https://letme.dev/email.send", "tool": "https://letme.dev/mailjet" }, "area": "communication", "unitPrices": [ { "item": "Starter", "unit": "month", "usd": 9, "note": "8,000 emails a month" }, { "item": "Essential", "unit": "month", "usd": 19, "note": "15,000 emails a month" }, { "item": "Premium", "unit": "month", "usd": 29, "note": "15,000 emails a month, automations and dedicated IP from 100k" } ], "provenance": { "legalEntity": "Mailjet SAS", "domain": "mailjet.com", "domainRegistered": "2006-11-08", "endpointOnVendorDomain": true, "terms": "https://www.mailjet.com/legal/terms/", "privacy": "https://www.mailjet.com/legal/privacy-policy/", "statusPage": "https://mailjet.statuspage.io/", "changelog": "https://www.mailjet.com/releases/", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "Mailjet is a Sinch brand. The terms list Mailjet SAS, Mailjet GmbH and Mailgun Technologies, Inc. as contracting entities depending on the customer." ], "score": 89 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/mailjet.json", "live": { "slug": "mailjet", "probe": { "target": "https://api.mailjet.com/v3.1", "method": "get", "lastAt": "2026-10-08T19:52:55.110071411Z", "lastOk": true, "lastStatus": 404, "lastMs": 41, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 52, "p95ms24h": 158, "samples24h": 272, "samples30d": 2143, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 225, "ok": 225 } ] }, "vendorStatus": { "page": "https://mailjet.statuspage.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-08T19:50:48.570627228Z" }, "versions": [ { "registry": "github", "name": "mailjet/mailjet-apiv3-nodejs", "version": "v7.1.0", "released": "2026-08-19", "seenAt": "2026-10-08T16:19:41.186986394Z" }, { "registry": "npm", "name": "@mailjet/mailjet-mcp-server", "version": "1.1.0", "seenAt": "2026-10-08T16:19:39.585469329Z" }, { "registry": "npm", "name": "node-mailjet", "version": "6.0.11", "seenAt": "2026-10-08T16:19:38.809231396Z" }, { "registry": "pypi", "name": "mailjet-rest", "version": "1.9.1", "released": "2026-10-07", "seenAt": "2026-10-08T16:19:41.05914168Z" } ], "githubStars": 255, "npmWeekly": 188083, "pypiWeekly": 211992, "securityTxt": { "url": "https://mailjet.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:54.456043233Z" }, "llmsTxt": { "url": "https://dev.mailjet.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:35.475621691Z" }, "domain": { "domain": "mailjet.com", "registered": "2006-11-08", "source": "https://rdap.verisign.com/com/v1/domain/mailjet.com", "checkedAt": "2026-10-04T13:08:17.150993109Z" }, "pages": [ { "url": "https://www.mailjet.com/releases/", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:29:01.884744237Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "67d03918114f" }, { "url": "https://www.mailjet.com/pricing/", "kind": "pricing", "status": 304, "checkedAt": "2026-10-08T18:29:00.186949542Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "ca0a13159f03" }, { "url": "https://www.mailjet.com/legal/privacy-policy/", "kind": "privacy", "status": 304, "checkedAt": "2026-10-08T18:28:55.863988068Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "43ec4206a3d6" }, { "url": "https://www.mailjet.com/legal/terms/", "kind": "terms", "status": 304, "checkedAt": "2026-10-08T18:28:57.897917455Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "bd8f1e18634f" } ], "updatedAt": "2026-10-08T19:52:55.110071411Z" } }, "answer": "Zoho CPaaS (formerly ZeptoMail) scores 61.8 (C) on agent readiness against Mailjet API + MCP's 59.4 (C), and leads in 5 of 7 scored categories. Mailjet API + MCP leads on reliability and maintenance \u0026 community.", "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": "2026-10-08T19:53:07.788146603Z", "lastOk": true, "lastStatus": 403, "lastMs": 459, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 433, "p95ms24h": 590, "samples24h": 27, "samples30d": 27, "days": [ { "date": "2026-10-08", "probes": 27, "ok": 27 } ] }, "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": "2026-10-08T19:53:07.788146603Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Mailjet (Sinch)", "b": "Zoho Corporation", "name": "Vendor" }, { "a": "https://api.mailjet.com/v3.1", "b": "https://cpaas.zoho.com/v1.1", "name": "Hosted endpoint" }, { "a": "HTTP, stdio", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT", "b": "Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT", "name": "Licence" }, { "a": "117", "b": "none", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-09-14", "b": "none", "name": "Last release" }, { "a": "no date given", "b": "no date given", "name": "Terms last updated" }, { "a": "2026-09-29", "b": "2025-12-22", "name": "Privacy policy last updated" }, { "a": "not found in the text", "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": "not found in the text", "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": "255 stars, 177k npm/wk, 245k PyPI/wk", "b": "40k npm/wk", "name": "Popularity" }, { "a": "2.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Zoho CPaaS (formerly ZeptoMail) scores 61.8 (C) on agent readiness against Mailjet API + MCP's 59.4 (C), and leads in 5 of 7 scored categories. Mailjet API + MCP leads on reliability and maintenance \u0026 community.", "question": "Which is better for AI agents, Mailjet API + MCP or Zoho CPaaS (formerly ZeptoMail)?" }, { "answer": "Mailjet API + MCP needs an API key. Zoho CPaaS (formerly ZeptoMail) takes an API key or an OAuth sign-in.", "question": "Do Mailjet API + MCP and Zoho CPaaS (formerly ZeptoMail) need an API key?" }, { "answer": "Yes. Mailjet API + MCP has a hosted endpoint at https://api.mailjet.com/v3.1 and Zoho CPaaS (formerly ZeptoMail) at https://cpaas.zoho.com/v1.1.", "question": "Can an agent call Mailjet API + MCP and Zoho CPaaS (formerly ZeptoMail) without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 62 against 41", "Maintenance \u0026 community, 79 against 74" ], "also": [ "Runs on your own machine", "Free to start without a card" ], "goodFor": "EU-based senders who want cheap transactional and marketing mail with data kept in the EU.", "slug": "mailjet", "watchFor": "The MCP server registers 117 GET-only tools and can't send" }, { "aheadOn": [ "Security \u0026 auth, 76 against 52", "Payments \u0026 pricing, 40 against 30", "Transparency \u0026 trust, 82 against 72" ], "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-mailjet.json", "title": "Amazon SES vs Mailjet API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-mailjet" }, { "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-mailjet.json", "title": "Brevo API + MCP vs Mailjet API + MCP", "url": "https://www.anchorterminal.com/compare/brevo-vs-mailjet" }, { "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-mailjet.json", "title": "Cloudflare Email Service vs Mailjet API + MCP", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailjet" }, { "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-mailjet.json", "title": "Loops API + MCP vs Mailjet API + MCP", "url": "https://www.anchorterminal.com/compare/loops-vs-mailjet" }, { "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-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-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-mailjet.json", "title": "Mailgun API + MCP vs Mailjet API + MCP", "url": "https://www.anchorterminal.com/compare/mailgun-vs-mailjet" }, { "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-mailtrap.json", "title": "Mailjet API + MCP vs Mailtrap Email API + MCP", "url": "https://www.anchorterminal.com/compare/mailjet-vs-mailtrap" }, { "json": "https://www.anchorterminal.com/compare/mailjet-vs-mandrill.json", "title": "Mailjet API + MCP vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/mailjet-vs-mandrill" }, { "json": "https://www.anchorterminal.com/compare/mailjet-vs-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/mailjet-vs-resend.json", "title": "Mailjet API + MCP vs Resend API + MCP", "url": "https://www.anchorterminal.com/compare/mailjet-vs-resend" }, { "json": "https://www.anchorterminal.com/compare/mailjet-vs-sendgrid.json", "title": "Mailjet API + MCP vs Twilio SendGrid", "url": "https://www.anchorterminal.com/compare/mailjet-vs-sendgrid" }, { "json": "https://www.anchorterminal.com/compare/mailjet-vs-smtp2go.json", "title": "Mailjet API + MCP vs SMTP2GO API + MCP", "url": "https://www.anchorterminal.com/compare/mailjet-vs-smtp2go" }, { "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": 21, "edge": "mailjet", "key": "reliability", "mailjet": 62, "name": "Reliability", "weight": 16, "zoho-zeptomail": 41 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 2, "edge": "zoho-zeptomail", "key": "schema", "mailjet": 76, "name": "Schema \u0026 documentation", "weight": 13, "zoho-zeptomail": 78 }, { "by": 2, "edge": "zoho-zeptomail", "key": "ergonomics", "mailjet": 53, "name": "Agent ergonomics", "weight": 13, "zoho-zeptomail": 55 }, { "by": 24, "edge": "zoho-zeptomail", "key": "security", "mailjet": 52, "name": "Security \u0026 auth", "weight": 14, "zoho-zeptomail": 76 }, { "by": 10, "edge": "zoho-zeptomail", "key": "payments", "mailjet": 30, "name": "Payments \u0026 pricing", "weight": 10, "zoho-zeptomail": 40 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 5, "edge": "mailjet", "key": "maintenance", "mailjet": 79, "name": "Maintenance \u0026 community", "weight": 7, "zoho-zeptomail": 74 }, { "by": 10, "edge": "zoho-zeptomail", "key": "transparency", "mailjet": 72, "name": "Transparency \u0026 trust", "weight": 7, "zoho-zeptomail": 82 } ], "summary": "Zoho CPaaS (formerly ZeptoMail) scores 61.8 (C) on agent readiness against Mailjet API + MCP's 59.4 (C), and leads in 5 of 7 scored categories. Mailjet API + MCP leads on reliability and maintenance \u0026 community. Both do email send.", "verdicts": { "mailjet": "SandboxMode on Send API v3.1 validates a payload without delivering it. The MCP server registers 117 GET-only tools and can't send.", "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/mailjet-vs-zoho-zeptomail", "json": "https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail.md", "slim": "https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail.min.md" }, "markdown": "Zoho CPaaS (formerly ZeptoMail) scores 61.8 (C) on agent readiness against Mailjet API + MCP's 59.4 (C), and leads in 5 of 7 scored categories. Mailjet API + MCP leads on reliability and maintenance \u0026 community. Both do email send.\n\n- Mailjet API + MCP: grade C, 59.4/100, rank #430 of 722. Markdown https://www.anchorterminal.com/tools/mailjet.md · JSON https://www.anchorterminal.com/api/v1/tools/mailjet.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### Mailjet API + MCP (C)\n\nGood for: EU-based senders who want cheap transactional and marketing mail with data kept in the EU.\n\nAhead on:\n- Reliability, 62 against 41\n- Maintenance \u0026 community, 79 against 74\n\nAlso in its favour:\n- Runs on your own machine\n- Free to start without a card\n\nWatch for: The MCP server registers 117 GET-only tools and can't send\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- Security \u0026 auth, 76 against 52\n- Payments \u0026 pricing, 40 against 30\n- Transparency \u0026 trust, 82 against 72\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 | Mailjet API + MCP | Zoho CPaaS (formerly ZeptoMail) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 62 | 41 | Mailjet API + MCP +21 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 76 | 78 | Zoho CPaaS (formerly ZeptoMail) +2 |\n| Agent ergonomics | 13% (16.2 this run) | 53 | 55 | Zoho CPaaS (formerly ZeptoMail) +2 |\n| Security \u0026 auth | 14% (17.5 this run) | 52 | 76 | Zoho CPaaS (formerly ZeptoMail) +24 |\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) | 79 | 74 | Mailjet API + MCP +5 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 72 | 82 | Zoho CPaaS (formerly ZeptoMail) +10 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **59.4 · C** | **61.8 · C** | |\n\n## Facts side by side\n\n| Fact | Mailjet API + MCP | Zoho CPaaS (formerly ZeptoMail) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Mailjet (Sinch) | Zoho Corporation |\n| Hosted endpoint | `https://api.mailjet.com/v3.1` | `https://cpaas.zoho.com/v1.1` |\n| Transports | HTTP, stdio | HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | MIT | Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT |\n| Tools exposed | 117 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-14 | none |\n| Terms last updated | no date given | no date given |\n| Privacy policy last updated | 2026-09-29 | 2025-12-22 |\n| Customer content may train models | not found in the text | 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 | not found in the text | not found in the text |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 255 stars, 177k npm/wk, 245k PyPI/wk | 40k npm/wk |\n| Agent reviews | 2.5/5 (2) | none |\n\n## Verdicts\n\n**Mailjet API + MCP.** SandboxMode on Send API v3.1 validates a payload without delivering it. The MCP server registers 117 GET-only tools and can't send.\n\n**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### Mailjet API + MCP\n\n1. Set `SandboxMode` to true on the first sends to check payloads without delivering\n2. Send with POST /v3.1/send and a `Messages` array, many messages per call\n3. Use the MCP for statistics and contact lookups only, since it can't send\n4. Pass `MAILJET_API_KEY` as `key:secret`. The server checks it at startup and exits if it's wrong\n5. On 429, wait and retry. Non-transactional endpoints have much lower limits than send\n\n### 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, Mailjet API + MCP or Zoho CPaaS (formerly ZeptoMail)?\n\nZoho CPaaS (formerly ZeptoMail) scores 61.8 (C) on agent readiness against Mailjet API + MCP's 59.4 (C), and leads in 5 of 7 scored categories. Mailjet API + MCP leads on reliability and maintenance \u0026 community.\n\n### Do Mailjet API + MCP and Zoho CPaaS (formerly ZeptoMail) need an API key?\n\nMailjet API + MCP needs an API key. Zoho CPaaS (formerly ZeptoMail) takes an API key or an OAuth sign-in.\n\n### Can an agent call Mailjet API + MCP and Zoho CPaaS (formerly ZeptoMail) without installing anything?\n\nYes. Mailjet API + MCP has a hosted endpoint at https://api.mailjet.com/v3.1 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/mailjet-vs-zoho-zeptomail.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mailjet\", \"b\": \"zoho-zeptomail\"}`. From a terminal: `anchor compare mailjet zoho-zeptomail`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mailjet.json and https://www.anchorterminal.com/api/v1/tools/zoho-zeptomail.json\n\n## Other comparisons with Mailjet API + MCP or Zoho CPaaS (formerly ZeptoMail)\n\n- [Amazon SES vs Mailjet API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-mailjet.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 Mailjet API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailjet.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 Mailjet API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailjet.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 Mailjet API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailjet.md)\n- [Loops API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.md)\n- [MailerSend vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailjet.md)\n- [MailerSend vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.md)\n- [Mailgun API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-mailjet.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 Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-mailtrap.md)\n- [Mailjet API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailjet-vs-mandrill.md)\n- [Mailjet API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-postmark.md)\n- [Mailjet API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-resend.md)\n- [Mailjet API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailjet-vs-sendgrid.md)\n- [Mailjet API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-smtp2go.md)\n- [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", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-08", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Mailjet API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "url": "" } ], "description": "Zoho CPaaS (formerly ZeptoMail) scores 61.8 (C) on agent readiness against Mailjet API + MCP's 59.4 (C), and leads in 5 of 7 scored categories. Mailjet API + MCP leads on reliability and maintenance \u0026 community. Both do email send. Category scores, facts, verdicts and agent…", "facts": [ "Mailjet API + MCP C 59.4", "Zoho CPaaS (formerly ZeptoMail) C 61.8", "scores" ], "h1": "Mailjet API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "image": "https://www.anchorterminal.com/assets/og/compare-mailjet-vs-zoho-zeptomail.png", "path": "/compare/mailjet-vs-zoho-zeptomail", "published": "2026-10-01", "section": "tools", "title": "Mailjet API + MCP vs Zoho CPaaS (formerly ZeptoMail) for AI agents", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail" }, "tokens": { "markdown": 2600, "slim": 680 }, "version": 1 }