{ "data": { "a": { "slug": "mailtrap", "name": "Mailtrap Email API + MCP", "vendor": "Mailtrap (Railsware)", "vendorUrl": "https://mailtrap.io", "kind": "http-api", "category": "email", "summary": "Email platform from Railsware Products Studio LLC for transactional and bulk sending, inbound mail, templates, contacts and sandbox testing. Agents reach it through a REST API, SMTP, SDKs, a CLI and a local MCP server.", "url": "https://www.anchorterminal.com/tools/mailtrap", "markdownUrl": "https://www.anchorterminal.com/tools/mailtrap.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mailtrap.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mailtrap.json", "repo": "https://github.com/mailtrap/mailtrap-mcp", "license": "Proprietary service under Mailtrap's terms of service. The MCP server, the Node.js SDK and the CLI are MIT", "transports": [ "http", "stdio" ], "remoteUrl": "https://send.api.mailtrap.io", "packages": [ { "registry": "npm", "name": "mailtrap" }, { "registry": "npm", "name": "mcp-mailtrap" }, { "registry": "pypi", "name": "mailtrap" } ], "auth": "api-key", "authNotes": "Self-serve API token, sent as `Authorization: Bearer` or in the `Api-Token` header. Tokens are created at mailtrap.io/settings/api-tokens with permissions per resource and an expiry of 1 to 365 days or a custom date (365 by default). A reset leaves the old token valid for 12 hours. The first token is made by hand in the UI, and later ones can be managed through the API. The MCP server reads `MAILTRAP_API_TOKEN`, and the sub-account tools need a separate organisation token.", "pricing": "freemium", "pricingNotes": "Free plan of 4,000 emails a month, capped at 150 a day, and the vendor says signup needs no credit card. Basic is $15 a month for 10,000 emails, Business starts at $85 for 100,000 and Enterprise at $750 for 1,500,000. Overage per 1,000 emails is $1.00, $0.88 and $0.55, and the free plan has none. Email Sandbox and Email Marketing are priced separately (https://mailtrap.io/pricing.md, checked 2026-10-08).", "priceSummary": "$15 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs index, the pricing reference, the OpenAPI specs or the MCP README (checked 2026-10-08).", "endpoints": [] }, "toolCount": 125, "popularity": { "githubStars": 65, "npmWeekly": 65939, "pypiWeekly": 21317, "asOf": "2026-10-08" }, "docsUrl": "https://docs.mailtrap.io/", "llmsTxt": "https://docs.mailtrap.io/llms.txt", "openapi": "https://github.com/mailtrap/mailtrap-openapi", "registryName": "io.mailtrap/mcp", "capabilities": [ "email.send", "email.inbound", "email.templates", "email.domains", "email.analytics", "email.marketing", "email.inbox", "email.threads" ], "tags": [ "hosted", "freemium", "no-card", "mcp", "openapi", "llms-txt", "cli", "smtp", "typescript", "python", "webhooks", "sandbox", "status-page", "soc2", "iso27001" ], "lastRelease": "2026-10-08", "graded": true, "anchor": { "graded": true, "score": 66.8, "grade": "B", "agentReady": false, "rank": 228, "ranked": true, "rankOf": 722, "categoryRank": 5, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 62, "maintenance": 93, "payments": 40, "reliability": 65, "schema": 82, "security": 60, "transparency": 77 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Public OpenAPI 3.1 specs, API tokens with per-resource permissions and expiry dates, and a free plan of 4,000 emails a month without a card support agent use. The MCP server loads 125 tools with no toolsets, no idempotency key was found for sends, and the status page records a sending outage of 1 hour 32 minutes on 1 August 2026.", "bestFor": "Teams that want sending, a test sandbox and inbound mail under one token, with public OpenAPI specs and a free plan.", "strengths": [ "Ten public OpenAPI 3.1 specs in mailtrap/mailtrap-openapi, plus llms.txt, llms-full.txt and a Markdown copy of every docs page", "API tokens carry per-resource permissions and an expiry date (365 days by default), and a reset keeps the old token valid for 12 hours", "Free plan of 4,000 emails a month, with signup stated as needing no credit card, and overage rates published per 1,000 emails", "Every MCP tool is annotated, 53 with readOnlyHint and the other 72 with destructiveHint set true or false", "Email Sandbox captures test sends without delivering them, through the same API token and SDK switch" ], "weaknesses": [ "The MCP server registers 125 tools at once, with no toolsets, filtering or read-only mode", "No idempotency key for sends was found in the OpenAPI specs or the docs", "The status page records a sending outage of 1 hour 32 minutes on 1 August 2026 covering the Email Sending API, SMTP and Inbound Email", "Inbound and sandbox message bodies reach the model through the MCP server, and no prompt-injection guidance was found in its README or the docs", "User audit logs are limited to the Enterprise plan, and the free plan keeps email logs for 3 days" ], "agentNotes": [ "Ask the operator to create the first API token at mailtrap.io/settings/api-tokens. The first token can't be created through the API.", "Send transactional mail to send.api.mailtrap.io and bulk mail to bulk.api.mailtrap.io. Sandbox sending uses a different base URL and an inbox ID.", "Verify a sending domain before the first production send, and use Email Sandbox to test payloads without delivery.", "Stay under 150 requests per 10 seconds per token, and 10 per 60 seconds per account on the Stats and Suppressions APIs. On 429, back off until `x-ratelimit-reset`.", "Don't retry a timed-out send blindly, because no idempotency key was found. Check the email logs first." ], "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": 66.8 } ], "editorialScores": { "ergonomics": 62, "maintenance": 93, "payments": 40, "reliability": 65, "schema": 82, "security": 60, "transparency": 66 }, "provenanceScore": 87 }, "connect": { "install": "npm install mailtrap", "http": "curl -X POST https://send.api.mailtrap.io/api/send \\\n -H 'Authorization: Bearer YOUR_API_KEY' \\\n -H 'Content-Type: application/json' \\\n -d '{\n \"from\": {\"email\": \"sender@example.com\"},\n \"to\": [{\"email\": \"recipient@example.com\"}],\n \"subject\": \"Hello from Mailtrap\",\n \"text\": \"Welcome to Mailtrap!\"\n }'", "config": { "mcpServers": { "mailtrap": { "args": [ "-y", "mcp-mailtrap" ], "command": "npx", "env": { "DEFAULT_FROM_EMAIL": "your_sender@example.com", "MAILTRAP_ACCOUNT_ID": "your_account_id", "MAILTRAP_API_TOKEN": "your_mailtrap_api_token", "MAILTRAP_SANDBOX_ID": "your_sandbox_id" } } } } }, "letme": { "capability": "https://letme.dev/email.send", "tool": "https://letme.dev/mailtrap" }, "area": "communication", "unitPrices": [ { "item": "Basic 10k", "unit": "month", "usd": 15, "note": "10,000 emails" }, { "item": "Basic 100k", "unit": "month", "usd": 30, "note": "100,000 emails" }, { "item": "Business 100k", "unit": "month", "usd": 85, "note": "100,000 emails" }, { "item": "Enterprise 1.5M", "unit": "month", "usd": 750, "note": "1,500,000 emails" }, { "item": "Overage on Basic", "unit": "1k-emails", "usd": 1 }, { "item": "Overage on Business", "unit": "1k-emails", "usd": 0.88 }, { "item": "Overage on Enterprise", "unit": "1k-emails", "usd": 0.55 } ], "provenance": { "legalEntity": "Railsware Products Studio LLC", "domain": "mailtrap.io", "domainRegistered": "2011-10-06", "endpointOnVendorDomain": true, "terms": "https://mailtrap.io/terms/", "privacy": "https://mailtrap.io/privacy/", "statusPage": "https://status.mailtrap.info", "changelog": "https://feedback.mailtrap.io/changelog", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms of service (effective 24 September 2026) name Railsware Products Studio LLC, 117 E Colorado Blvd, Suite 600, Office 650, Pasadena, CA 91105, and are governed by Delaware law with AAA arbitration.", "The privacy policy and the data processing addendum at mailtrap.io/dpa are both dated 24 September 2026.", "The sending API answers at send.api.mailtrap.io and bulk.api.mailtrap.io. The status page is on a separate domain, status.mailtrap.info, hosted by Sorry.", "mailtrap.io/.well-known/security.txt returns 404.", "RDAP for mailtrap.io gives a registration date of 2011-10-06." ], "score": 87 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/mailtrap.json", "live": { "slug": "mailtrap", "probe": { "target": "https://send.api.mailtrap.io", "method": "get", "lastAt": "2026-10-08T20:09:50.470896433Z", "lastOk": true, "lastStatus": 404, "lastMs": 440, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 414, "p95ms24h": 468, "samples24h": 30, "samples30d": 30, "days": [ { "date": "2026-10-08", "probes": 30, "ok": 30 } ] }, "vendorStatus": { "page": "https://status.mailtrap.info", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:38:46.22405333Z" }, "pages": [ { "url": "https://feedback.mailtrap.io/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:20:18.491752089Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "e3acdfa7f8c4" }, { "url": "https://mailtrap.io/pricing.md", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:21:50.026823293Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "fb22f75ee67f" }, { "url": "https://mailtrap.io/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:21:52.480729163Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "b8aafb804ef9" }, { "url": "https://mailtrap.io/terms/", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:21:54.495970731Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "1c4fcbf64dac" } ], "updatedAt": "2026-10-08T20:09:50.470896433Z" } }, "answer": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 4 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth 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": "Mailtrap (Railsware)", "b": "Zoho Corporation", "name": "Vendor" }, { "a": "https://send.api.mailtrap.io", "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": "Proprietary service under Mailtrap's terms of service. The MCP server, the Node.js SDK and the CLI are MIT", "b": "Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT", "name": "Licence" }, { "a": "125", "b": "none", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "io.mailtrap/mcp", "b": "not listed", "name": "MCP registry" }, { "a": "2026-10-08", "b": "none", "name": "Last release" }, { "a": "2026-09-24", "b": "no date given", "name": "Terms last updated" }, { "a": "2026-09-24", "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": "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": "65 stars, 66k npm/wk, 21k PyPI/wk", "b": "40k npm/wk", "name": "Popularity" } ], "faq": [ { "answer": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 4 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth and transparency \u0026 trust.", "question": "Which is better for AI agents, Mailtrap Email API + MCP or Zoho CPaaS (formerly ZeptoMail)?" }, { "answer": "Mailtrap Email API + MCP needs an API key. Zoho CPaaS (formerly ZeptoMail) takes an API key or an OAuth sign-in.", "question": "Do Mailtrap Email API + MCP and Zoho CPaaS (formerly ZeptoMail) need an API key?" }, { "answer": "Yes. Mailtrap Email API + MCP has a hosted endpoint at https://send.api.mailtrap.io and Zoho CPaaS (formerly ZeptoMail) at https://cpaas.zoho.com/v1.1.", "question": "Can an agent call Mailtrap Email API + MCP and Zoho CPaaS (formerly ZeptoMail) without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 65 against 41", "Agent ergonomics, 62 against 55", "Maintenance \u0026 community, 93 against 74" ], "also": [ "Runs on your own machine", "Free to start without a card" ], "goodFor": "Teams that want sending, a test sandbox and inbound mail under one token, with public OpenAPI specs and a free plan.", "slug": "mailtrap", "watchFor": "The MCP server registers 125 tools at once, with no toolsets, filtering or read-only mode" }, { "aheadOn": [ "Security \u0026 auth, 76 against 60", "Transparency \u0026 trust, 82 against 77" ], "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-mailtrap.json", "title": "Amazon SES vs Mailtrap Email API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-mailtrap" }, { "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-mailtrap.json", "title": "Brevo API + MCP vs Mailtrap Email API + MCP", "url": "https://www.anchorterminal.com/compare/brevo-vs-mailtrap" }, { "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-mailtrap.json", "title": "Cloudflare Email Service vs Mailtrap Email API + MCP", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailtrap" }, { "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-mailtrap.json", "title": "Loops API + MCP vs Mailtrap Email API + MCP", "url": "https://www.anchorterminal.com/compare/loops-vs-mailtrap" }, { "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-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-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-mailtrap.json", "title": "Mailgun API + MCP vs Mailtrap Email API + MCP", "url": "https://www.anchorterminal.com/compare/mailgun-vs-mailtrap" }, { "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-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-mandrill.json", "title": "Mailtrap Email API + MCP vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/mailtrap-vs-mandrill" }, { "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/mailtrap-vs-resend.json", "title": "Mailtrap Email API + MCP vs Resend API + MCP", "url": "https://www.anchorterminal.com/compare/mailtrap-vs-resend" }, { "json": "https://www.anchorterminal.com/compare/mailtrap-vs-sendgrid.json", "title": "Mailtrap Email API + MCP vs Twilio SendGrid", "url": "https://www.anchorterminal.com/compare/mailtrap-vs-sendgrid" }, { "json": "https://www.anchorterminal.com/compare/mailtrap-vs-smtp2go.json", "title": "Mailtrap Email API + MCP vs SMTP2GO API + MCP", "url": "https://www.anchorterminal.com/compare/mailtrap-vs-smtp2go" }, { "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": 24, "edge": "mailtrap", "key": "reliability", "mailtrap": 65, "name": "Reliability", "weight": 16, "zoho-zeptomail": 41 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 4, "edge": "mailtrap", "key": "schema", "mailtrap": 82, "name": "Schema \u0026 documentation", "weight": 13, "zoho-zeptomail": 78 }, { "by": 7, "edge": "mailtrap", "key": "ergonomics", "mailtrap": 62, "name": "Agent ergonomics", "weight": 13, "zoho-zeptomail": 55 }, { "by": 16, "edge": "zoho-zeptomail", "key": "security", "mailtrap": 60, "name": "Security \u0026 auth", "weight": 14, "zoho-zeptomail": 76 }, { "by": 0, "edge": "", "key": "payments", "mailtrap": 40, "name": "Payments \u0026 pricing", "weight": 10, "zoho-zeptomail": 40 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 19, "edge": "mailtrap", "key": "maintenance", "mailtrap": 93, "name": "Maintenance \u0026 community", "weight": 7, "zoho-zeptomail": 74 }, { "by": 5, "edge": "zoho-zeptomail", "key": "transparency", "mailtrap": 77, "name": "Transparency \u0026 trust", "weight": 7, "zoho-zeptomail": 82 } ], "summary": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 4 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth and transparency \u0026 trust. Both do email send.", "verdicts": { "mailtrap": "Public OpenAPI 3.1 specs, API tokens with per-resource permissions and expiry dates, and a free plan of 4,000 emails a month without a card support agent use. The MCP server loads 125 tools with no toolsets, no idempotency key was found for sends, and the status page records a sending outage of 1 hour 32 minutes on 1 August 2026.", "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/mailtrap-vs-zoho-zeptomail", "json": "https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail.md", "slim": "https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail.min.md" }, "markdown": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 4 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth and transparency \u0026 trust. Both do email send.\n\n- Mailtrap Email API + MCP: grade B, 66.8/100, rank #228 of 722. Markdown https://www.anchorterminal.com/tools/mailtrap.md · JSON https://www.anchorterminal.com/api/v1/tools/mailtrap.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### Mailtrap Email API + MCP (B)\n\nGood for: Teams that want sending, a test sandbox and inbound mail under one token, with public OpenAPI specs and a free plan.\n\nAhead on:\n- Reliability, 65 against 41\n- Agent ergonomics, 62 against 55\n- Maintenance \u0026 community, 93 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 125 tools at once, with no toolsets, filtering or read-only mode\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 60\n- Transparency \u0026 trust, 82 against 77\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 | Mailtrap Email API + MCP | Zoho CPaaS (formerly ZeptoMail) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 65 | 41 | Mailtrap Email API + MCP +24 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 82 | 78 | Mailtrap Email API + MCP +4 |\n| Agent ergonomics | 13% (16.2 this run) | 62 | 55 | Mailtrap Email API + MCP +7 |\n| Security \u0026 auth | 14% (17.5 this run) | 60 | 76 | Zoho CPaaS (formerly ZeptoMail) +16 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 40 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 93 | 74 | Mailtrap Email API + MCP +19 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 77 | 82 | Zoho CPaaS (formerly ZeptoMail) +5 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **66.8 · B** | **61.8 · C** | |\n\n## Facts side by side\n\n| Fact | Mailtrap Email API + MCP | Zoho CPaaS (formerly ZeptoMail) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Mailtrap (Railsware) | Zoho Corporation |\n| Hosted endpoint | `https://send.api.mailtrap.io` | `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 | Proprietary service under Mailtrap's terms of service. The MCP server, the Node.js SDK and the CLI are MIT | Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT |\n| Tools exposed | 125 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | `io.mailtrap/mcp` | not listed |\n| Last release | 2026-10-08 | none |\n| Terms last updated | 2026-09-24 | no date given |\n| Privacy policy last updated | 2026-09-24 | 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 | yes | not found in the text |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 65 stars, 66k npm/wk, 21k PyPI/wk | 40k npm/wk |\n\n## Verdicts\n\n**Mailtrap Email API + MCP.** Public OpenAPI 3.1 specs, API tokens with per-resource permissions and expiry dates, and a free plan of 4,000 emails a month without a card support agent use. The MCP server loads 125 tools with no toolsets, no idempotency key was found for sends, and the status page records a sending outage of 1 hour 32 minutes on 1 August 2026.\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### Mailtrap Email API + MCP\n\n1. Ask the operator to create the first API token at mailtrap.io/settings/api-tokens. The first token can't be created through the API.\n2. Send transactional mail to send.api.mailtrap.io and bulk mail to bulk.api.mailtrap.io. Sandbox sending uses a different base URL and an inbox ID.\n3. Verify a sending domain before the first production send, and use Email Sandbox to test payloads without delivery.\n4. Stay under 150 requests per 10 seconds per token, and 10 per 60 seconds per account on the Stats and Suppressions APIs. On 429, back off until `x-ratelimit-reset`.\n5. Don't retry a timed-out send blindly, because no idempotency key was found. Check the email logs first.\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, Mailtrap Email API + MCP or Zoho CPaaS (formerly ZeptoMail)?\n\nMailtrap Email API + MCP scores 66.8 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 4 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth and transparency \u0026 trust.\n\n### Do Mailtrap Email API + MCP and Zoho CPaaS (formerly ZeptoMail) need an API key?\n\nMailtrap Email 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 Mailtrap Email API + MCP and Zoho CPaaS (formerly ZeptoMail) without installing anything?\n\nYes. Mailtrap Email API + MCP has a hosted endpoint at https://send.api.mailtrap.io 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/mailtrap-vs-zoho-zeptomail.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mailtrap\", \"b\": \"zoho-zeptomail\"}`. From a terminal: `anchor compare mailtrap zoho-zeptomail`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mailtrap.json and https://www.anchorterminal.com/api/v1/tools/zoho-zeptomail.json\n\n## Other comparisons with Mailtrap Email API + MCP or Zoho CPaaS (formerly ZeptoMail)\n\n- [Amazon SES vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-mailtrap.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 Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailtrap.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 Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailtrap.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 Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailtrap.md)\n- [Loops API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.md)\n- [MailerSend vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailtrap.md)\n- [MailerSend vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.md)\n- [Mailgun API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-mailtrap.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 Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailjet-vs-zoho-zeptomail.md)\n- [Mailtrap Email API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailtrap-vs-mandrill.md)\n- [Mailtrap Email API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailtrap-vs-postmark.md)\n- [Mailtrap Email API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/mailtrap-vs-resend.md)\n- [Mailtrap Email API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailtrap-vs-sendgrid.md)\n- [Mailtrap Email API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mailtrap-vs-smtp2go.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": "Mailtrap Email API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "url": "" } ], "description": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 4 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth and transparency \u0026 trust. Both do email send. Category scores, facts…", "facts": [ "Mailtrap Email API + MCP B 66.8", "Zoho CPaaS (formerly ZeptoMail) C 61.8", "scores" ], "h1": "Mailtrap Email API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "image": "https://www.anchorterminal.com/assets/og/compare-mailtrap-vs-zoho-zeptomail.png", "path": "/compare/mailtrap-vs-zoho-zeptomail", "published": "2026-10-01", "section": "tools", "title": "Mailtrap Email API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail" }, "tokens": { "markdown": 2800, "slim": 730 }, "version": 1 }