{ "data": { "a": { "slug": "cloudflare-email-service", "name": "Cloudflare Email Service", "vendor": "Cloudflare", "vendorUrl": "https://developers.cloudflare.com/email-service/", "kind": "http-api", "category": "email", "summary": "Cloudflare Email Service sends transactional email through a REST API, a Workers binding or SMTP, and routes inbound mail to Workers or verified addresses. Email Sending is in public beta and needs the Workers Paid plan for arbitrary recipients.", "url": "https://www.anchorterminal.com/tools/cloudflare-email-service", "markdownUrl": "https://www.anchorterminal.com/tools/cloudflare-email-service.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cloudflare-email-service.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cloudflare-email-service.json", "license": "Proprietary service under Cloudflare's Self-Serve Subscription Agreement and Developer Platform service-specific terms. The official `cloudflare` SDK on npm is Apache-2.0", "transports": [ "http" ], "remoteUrl": "https://api.cloudflare.com/client/v4", "packages": [ { "registry": "npm", "name": "cloudflare" }, { "registry": "pypi", "name": "cloudflare" } ], "auth": "api-key", "authNotes": "A Cloudflare API token as a Bearer header, created by the account owner in the dashboard. The SMTP guide names the permission Email Sending: Edit, and the OpenAPI file lists `com.cloudflare.api.account.email.sending.create` for sends and `.read` for limits and reputation. Tokens can carry an expiry and an IP address filter. The same token is the SMTP password. The OpenAPI file also accepts the legacy global API key. Access is self-serve, but the sending domain must be on Cloudflare DNS and new accounts start with a daily quota that Cloudflare raises over time.", "pricing": "usage", "pricingNotes": "$0.35 per 1,000 outbound emails after 3,000 included a month, on the Workers Paid plan (minimum $5 a month). Sending to arbitrary recipients is not available on Workers Free. Sends to the account's own verified destination addresses are free on every plan, and inbound Email Routing is free and unmetered. Hard bounces count towards the quota. Sends rejected at the API boundary or by the suppression list don't (https://developers.cloudflare.com/email-service/platform/pricing/).", "priceSummary": "$5 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the Email Service docs, the pricing page or the Email Sending paths of the OpenAPI file (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": 3766696, "pypiWeekly": 363923, "asOf": "2026-10-08" }, "docsUrl": "https://developers.cloudflare.com/email-service/", "llmsTxt": "https://developers.cloudflare.com/email-service/llms.txt", "openapi": "https://raw.githubusercontent.com/cloudflare/api-schemas/main/openapi.json", "capabilities": [ "email.send", "email.inbound", "email.domains", "email.analytics" ], "tags": [ "hosted", "usage", "beta", "openapi", "llms-txt", "smtp", "typescript", "python", "go", "graphql", "status-page", "bug-bounty" ], "lastRelease": "2026-09-25", "graded": true, "anchor": { "graded": true, "score": 67.3, "grade": "B", "agentReady": false, "rank": 212, "ranked": true, "rankOf": 722, "categoryRank": 4, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 72, "maintenance": 81, "payments": 30, "reliability": 51, "schema": 89, "security": 77, "transparency": 76 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Cloudflare API tokens can be limited to sending, given an expiry and restricted by IP address, and a public OpenAPI file covers 29 Email Sending operations. Sending is still in beta, with no SLA, no idempotency key and no published daily quota, and it needs a domain on Cloudflare DNS and the Workers Paid plan.", "bestFor": "Teams already on Cloudflare DNS and Workers that want transactional sending and inbound handling in one account at a low unit price.", "strengths": [ "Public OpenAPI 3.0.3 file with 29 Email Sending and 46 Email Routing operations, plus llms.txt and a Markdown copy of every docs page", "$0.35 per 1,000 emails after 3,000 included a month on Workers Paid. Sends rejected at the API boundary or blocked by the suppression list don't count", "API tokens carry separate send and read permissions, an optional expiry and an IP address filter, and Workers bindings can be limited to named senders and recipients", "The Cloudflare API returns 429 with `retry-after` and `Ratelimit` headers, and the send endpoint has its own throttled error code 10004", "Email Sending and Email Routing are separate components on cloudflarestatus.com, and the changelog has four dated entries since 15 July 2026" ], "weaknesses": [ "Email Sending has been in public beta since 16 April 2026. Cloudflare's terms let it remove a beta service at any time, and no SLA was found", "No idempotency key on `/email/sending/send`, in the docs or the OpenAPI file", "The daily sending quota for new accounts is described as conservative with no number. It can be read per account from `/email/sending/limits`", "The sending domain must use Cloudflare DNS, and sending to arbitrary recipients needs the Workers Paid plan at $5 a month", "A token with the send permission can send from every onboarded domain on the account. No per-domain token scope was found", "No template storage, and the terms and FAQ allow transactional email only" ], "agentNotes": [ "POST to `https://api.cloudflare.com/client/v4/accounts/{account_id}/email/sending/send` with `Authorization: Bearer \u003ctoken\u003e`. The body needs `to`, `from`, `subject` and one of `html` or `text`", "Don't retry a timed-out send blindly. There is no idempotency key, so look for the message in the `emailSendingAdaptive` GraphQL dataset first", "On 429 (code 10004) wait for the `retry-after` header. On 409 `sending_not_ready` the domain setup is unfinished and nothing was sent", "Read `result.delivered`, `result.queued` and `result.permanent_bounces` in the response. A 200 does not mean every recipient was accepted", "Keep to 50 recipients across to, cc and bcc, and 5 MiB per message including attachments", "For SMTP use `smtp.mx.cloudflare.net` on port 465 with implicit TLS, username `api_token` and the API token as password. Port 587 is not supported", "By default one suppressed recipient fails the whole send. Turn on Drop suppressed recipients for the domain to send to the rest" ], "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": 67.3 } ], "editorialScores": { "ergonomics": 72, "maintenance": 81, "payments": 30, "reliability": 51, "schema": 89, "security": 77, "transparency": 57 }, "provenanceScore": 95 }, "connect": { "http": "curl \"https://api.cloudflare.com/client/v4/accounts/{account_id}/email/sending/send\" \\\n --header \"Authorization: Bearer \u003cAPI_TOKEN\u003e\" \\\n --header \"Content-Type: application/json\" \\\n --data '{\"to\":\"recipient@example.com\",\"from\":\"welcome@yourdomain.com\",\"subject\":\"Welcome to our service!\",\"html\":\"\u003ch1\u003eWelcome!\u003c/h1\u003e\u003cp\u003eThanks for signing up.\u003c/p\u003e\",\"text\":\"Welcome! Thanks for signing up.\"}'" }, "letme": { "capability": "https://letme.dev/email.send", "tool": "https://letme.dev/cloudflare-email-service" }, "sameCompany": [ "cloudflare-sandbox-sdk", "cloudflare-web-search", "cloudflare-mcp", "cloudflare-r2", "cloudflare-clef" ], "area": "communication", "unitPrices": [ { "item": "Outbound email", "unit": "1k-emails", "usd": 0.35, "note": "After 3,000 included a month, Workers Paid plan only. Sends to verified destination addresses are free" }, { "item": "Workers Paid plan", "unit": "month", "usd": 5, "note": "Minimum monthly charge for the plan that Email Sending to arbitrary recipients needs" } ], "provenance": { "legalEntity": "Cloudflare, Inc.", "domain": "cloudflare.com", "domainRegistered": "2009-02-17", "endpointOnVendorDomain": true, "terms": "https://www.cloudflare.com/terms/", "privacy": "https://www.cloudflare.com/privacypolicy/", "statusPage": "https://www.cloudflarestatus.com", "changelog": "https://developers.cloudflare.com/changelog/product/email-service/", "securityTxt": "valid", "checked": "2026-10-08", "notes": [ "Terms are the Self-Serve Subscription Agreement, last updated 12 September 2025, which names Cloudflare, Inc. at 101 Townsend St, San Francisco. Its section 5 covers beta services.", "The Developer Platform service-specific terms (https://www.cloudflare.com/service-specific-terms-developer-platform/), last updated 28 September 2026, have their own sections for Cloudflare Email Service and Email Routing and supplement the agreement.", "The privacy policy is effective from 4 November 2025 and makes Cloudflare a data processor for customer content that crosses its network. A customer DPA is at https://www.cloudflare.com/cloudflare-customer-dpa/.", "www.cloudflare.com/.well-known/security.txt, read on 8 October 2026, names HackerOne and a disclosure policy and has no Expires field. It is recorded as valid to match the other Cloudflare listings.", "The REST endpoint is on api.cloudflare.com. The SMTP endpoint is on smtp.mx.cloudflare.net, a different registered domain.", "The status page lists Email Sending and Email Routing as separate components, both operational on 8 October 2026.", "RDAP for cloudflare.com gives a registration date of 2009-02-17." ], "score": 95 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/cloudflare-email-service.json", "live": { "slug": "cloudflare-email-service", "probe": { "target": "https://api.cloudflare.com/client/v4", "method": "get", "lastAt": "2026-10-08T21:12:07.608903417Z", "lastOk": true, "lastStatus": 404, "lastMs": 38, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 38, "p95ms24h": 97, "samples24h": 21, "samples30d": 21, "days": [ { "date": "2026-10-08", "probes": 21, "ok": 21 } ] }, "vendorStatus": { "page": "https://www.cloudflarestatus.com", "indicator": "major", "summary": "Partial System Outage", "checkedAt": "2026-10-08T21:05:54.426735933Z" }, "updatedAt": "2026-10-08T21:12:07.608903417Z" } }, "answer": "Cloudflare Email Service scores 67.3 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 5 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on 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": "2026-10-08T21:12:27.054085889Z", "lastOk": true, "lastStatus": 403, "lastMs": 415, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 430, "p95ms24h": 470, "samples24h": 41, "samples30d": 41, "days": [ { "date": "2026-10-08", "probes": 41, "ok": 41 } ] }, "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": "2026-10-08T21:12:27.054085889Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Cloudflare", "b": "Zoho Corporation", "name": "Vendor" }, { "a": "https://api.cloudflare.com/client/v4", "b": "https://cpaas.zoho.com/v1.1", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Pay per use", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under Cloudflare's Self-Serve Subscription Agreement and Developer Platform service-specific terms. The official `cloudflare` SDK on npm is Apache-2.0", "b": "Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-09-25", "b": "none", "name": "Last release" }, { "a": "2025-09-12", "b": "no date given", "name": "Terms last updated" }, { "a": "no date given", "b": "2025-12-22", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "yes", "name": "Customer content may train models" }, { "a": "yes", "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": "3.8M npm/wk, 364k PyPI/wk", "b": "40k npm/wk", "name": "Popularity" } ], "faq": [ { "answer": "Cloudflare Email Service scores 67.3 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 5 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on payments \u0026 pricing and transparency \u0026 trust.", "question": "Which is better for AI agents, Cloudflare Email Service or Zoho CPaaS (formerly ZeptoMail)?" }, { "answer": "Cloudflare Email Service needs an API key. Zoho CPaaS (formerly ZeptoMail) takes an API key or an OAuth sign-in.", "question": "Do Cloudflare Email Service and Zoho CPaaS (formerly ZeptoMail) need an API key?" }, { "answer": "Yes. Cloudflare Email Service has a hosted endpoint at https://api.cloudflare.com/client/v4 and Zoho CPaaS (formerly ZeptoMail) at https://cpaas.zoho.com/v1.1.", "question": "Can an agent call Cloudflare Email Service and Zoho CPaaS (formerly ZeptoMail) without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 51 against 41", "Schema \u0026 documentation, 89 against 78", "Agent ergonomics, 72 against 55", "Maintenance \u0026 community, 81 against 74" ], "also": null, "goodFor": "Teams already on Cloudflare DNS and Workers that want transactional sending and inbound handling in one account at a low unit price.", "slug": "cloudflare-email-service", "watchFor": "Email Sending has been in public beta since 16 April 2026. Cloudflare's terms let it remove a beta service at any time, and no SLA was found" }, { "aheadOn": [ "Payments \u0026 pricing, 40 against 30", "Transparency \u0026 trust, 82 against 76" ], "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-cloudflare-email-service.json", "title": "Amazon SES vs Cloudflare Email Service", "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-cloudflare-email-service" }, { "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-cloudflare-email-service.json", "title": "Brevo API + MCP vs Cloudflare Email Service", "url": "https://www.anchorterminal.com/compare/brevo-vs-cloudflare-email-service" }, { "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-loops.json", "title": "Cloudflare Email Service vs Loops API + MCP", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-loops" }, { "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-mailgun.json", "title": "Cloudflare Email Service vs Mailgun API + MCP", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailgun" }, { "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-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-mandrill.json", "title": "Cloudflare Email Service vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill" }, { "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-postmark.json", "title": "Cloudflare Email Service vs Postmark API + MCP", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-postmark" }, { "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-resend.json", "title": "Cloudflare Email Service vs Resend API + MCP", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-resend" }, { "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-sendgrid.json", "title": "Cloudflare Email Service vs Twilio SendGrid", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-sendgrid" }, { "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-smtp2go.json", "title": "Cloudflare Email Service vs SMTP2GO API + MCP", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-smtp2go" }, { "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-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-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": 10, "cloudflare-email-service": 51, "edge": "cloudflare-email-service", "key": "reliability", "name": "Reliability", "weight": 16, "zoho-zeptomail": 41 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 11, "cloudflare-email-service": 89, "edge": "cloudflare-email-service", "key": "schema", "name": "Schema \u0026 documentation", "weight": 13, "zoho-zeptomail": 78 }, { "by": 17, "cloudflare-email-service": 72, "edge": "cloudflare-email-service", "key": "ergonomics", "name": "Agent ergonomics", "weight": 13, "zoho-zeptomail": 55 }, { "by": 1, "cloudflare-email-service": 77, "edge": "cloudflare-email-service", "key": "security", "name": "Security \u0026 auth", "weight": 14, "zoho-zeptomail": 76 }, { "by": 10, "cloudflare-email-service": 30, "edge": "zoho-zeptomail", "key": "payments", "name": "Payments \u0026 pricing", "weight": 10, "zoho-zeptomail": 40 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 7, "cloudflare-email-service": 81, "edge": "cloudflare-email-service", "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7, "zoho-zeptomail": 74 }, { "by": 6, "cloudflare-email-service": 76, "edge": "zoho-zeptomail", "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7, "zoho-zeptomail": 82 } ], "summary": "Cloudflare Email Service scores 67.3 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 5 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on payments \u0026 pricing and transparency \u0026 trust. Both do email send.", "verdicts": { "cloudflare-email-service": "Cloudflare API tokens can be limited to sending, given an expiry and restricted by IP address, and a public OpenAPI file covers 29 Email Sending operations. Sending is still in beta, with no SLA, no idempotency key and no published daily quota, and it needs a domain on Cloudflare DNS and the Workers Paid plan.", "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/cloudflare-email-service-vs-zoho-zeptomail", "json": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail.md", "slim": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail.min.md" }, "markdown": "Cloudflare Email Service scores 67.3 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 5 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on payments \u0026 pricing and transparency \u0026 trust. Both do email send.\n\n- Cloudflare Email Service: grade B, 67.3/100, rank #212 of 722. Markdown https://www.anchorterminal.com/tools/cloudflare-email-service.md · JSON https://www.anchorterminal.com/api/v1/tools/cloudflare-email-service.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### Cloudflare Email Service (B)\n\nGood for: Teams already on Cloudflare DNS and Workers that want transactional sending and inbound handling in one account at a low unit price.\n\nAhead on:\n- Reliability, 51 against 41\n- Schema \u0026 documentation, 89 against 78\n- Agent ergonomics, 72 against 55\n- Maintenance \u0026 community, 81 against 74\n\nWatch for: Email Sending has been in public beta since 16 April 2026. Cloudflare's terms let it remove a beta service at any time, and no SLA was found\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- Payments \u0026 pricing, 40 against 30\n- Transparency \u0026 trust, 82 against 76\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 | Cloudflare Email Service | Zoho CPaaS (formerly ZeptoMail) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 51 | 41 | Cloudflare Email Service +10 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 89 | 78 | Cloudflare Email Service +11 |\n| Agent ergonomics | 13% (16.2 this run) | 72 | 55 | Cloudflare Email Service +17 |\n| Security \u0026 auth | 14% (17.5 this run) | 77 | 76 | Cloudflare Email Service +1 |\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) | 81 | 74 | Cloudflare Email Service +7 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 76 | 82 | Zoho CPaaS (formerly ZeptoMail) +6 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **67.3 · B** | **61.8 · C** | |\n\n## Facts side by side\n\n| Fact | Cloudflare Email Service | Zoho CPaaS (formerly ZeptoMail) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Cloudflare | Zoho Corporation |\n| Hosted endpoint | `https://api.cloudflare.com/client/v4` | `https://cpaas.zoho.com/v1.1` |\n| Transports | HTTP | HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | Proprietary service under Cloudflare's Self-Serve Subscription Agreement and Developer Platform service-specific terms. The official `cloudflare` SDK on npm is Apache-2.0 | Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-25 | none |\n| Terms last updated | 2025-09-12 | no date given |\n| Privacy policy last updated | no date given | 2025-12-22 |\n| Customer content may train models | not found in the text | yes |\n| Terms restrict automated access | yes | 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 | 3.8M npm/wk, 364k PyPI/wk | 40k npm/wk |\n\n## Verdicts\n\n**Cloudflare Email Service.** Cloudflare API tokens can be limited to sending, given an expiry and restricted by IP address, and a public OpenAPI file covers 29 Email Sending operations. Sending is still in beta, with no SLA, no idempotency key and no published daily quota, and it needs a domain on Cloudflare DNS and the Workers Paid plan.\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### Cloudflare Email Service\n\n1. POST to `https://api.cloudflare.com/client/v4/accounts/{account_id}/email/sending/send` with `Authorization: Bearer \u003ctoken\u003e`. The body needs `to`, `from`, `subject` and one of `html` or `text`\n2. Don't retry a timed-out send blindly. There is no idempotency key, so look for the message in the `emailSendingAdaptive` GraphQL dataset first\n3. On 429 (code 10004) wait for the `retry-after` header. On 409 `sending_not_ready` the domain setup is unfinished and nothing was sent\n4. Read `result.delivered`, `result.queued` and `result.permanent_bounces` in the response. A 200 does not mean every recipient was accepted\n5. Keep to 50 recipients across to, cc and bcc, and 5 MiB per message including attachments\n6. For SMTP use `smtp.mx.cloudflare.net` on port 465 with implicit TLS, username `api_token` and the API token as password. Port 587 is not supported\n7. By default one suppressed recipient fails the whole send. Turn on Drop suppressed recipients for the domain to send to the rest\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, Cloudflare Email Service or Zoho CPaaS (formerly ZeptoMail)?\n\nCloudflare Email Service scores 67.3 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 5 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on payments \u0026 pricing and transparency \u0026 trust.\n\n### Do Cloudflare Email Service and Zoho CPaaS (formerly ZeptoMail) need an API key?\n\nCloudflare Email Service needs an API key. Zoho CPaaS (formerly ZeptoMail) takes an API key or an OAuth sign-in.\n\n### Can an agent call Cloudflare Email Service and Zoho CPaaS (formerly ZeptoMail) without installing anything?\n\nYes. Cloudflare Email Service has a hosted endpoint at https://api.cloudflare.com/client/v4 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/cloudflare-email-service-vs-zoho-zeptomail.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"cloudflare-email-service\", \"b\": \"zoho-zeptomail\"}`. From a terminal: `anchor compare cloudflare-email-service zoho-zeptomail`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/cloudflare-email-service.json and https://www.anchorterminal.com/api/v1/tools/zoho-zeptomail.json\n\n## Other comparisons with Cloudflare Email Service or Zoho CPaaS (formerly ZeptoMail)\n\n- [Amazon SES vs Cloudflare Email Service](https://www.anchorterminal.com/compare/amazon-ses-vs-cloudflare-email-service.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 Cloudflare Email Service](https://www.anchorterminal.com/compare/brevo-vs-cloudflare-email-service.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 Loops API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-loops.md)\n- [Cloudflare Email Service vs MailerSend](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailersend.md)\n- [Cloudflare Email Service vs Mailgun API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailgun.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 Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mailtrap.md)\n- [Cloudflare Email Service vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill.md)\n- [Cloudflare Email Service vs Postmark API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-postmark.md)\n- [Cloudflare Email Service vs Resend API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-resend.md)\n- [Cloudflare Email Service vs Twilio SendGrid](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-sendgrid.md)\n- [Cloudflare Email Service vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-smtp2go.md)\n- [Loops API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.md)\n- [MailerSend vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.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", "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": "Cloudflare Email Service vs Zoho CPaaS (formerly ZeptoMail)", "url": "" } ], "description": "Cloudflare Email Service scores 67.3 (B) on agent readiness against Zoho CPaaS (formerly ZeptoMail)'s 61.8 (C), and leads in 5 of 7 scored categories. Zoho CPaaS (formerly ZeptoMail) leads on payments \u0026 pricing and transparency \u0026 trust. Both do email send. Category scores…", "facts": [ "Cloudflare Email Service B 67.3", "Zoho CPaaS (formerly ZeptoMail) C 61.8", "scores" ], "h1": "Cloudflare Email Service vs Zoho CPaaS (formerly ZeptoMail)", "image": "https://www.anchorterminal.com/assets/og/compare-cloudflare-email-service-vs-zoho-zeptomail.png", "path": "/compare/cloudflare-email-service-vs-zoho-zeptomail", "published": "2026-10-01", "section": "tools", "title": "Cloudflare Email Service vs Zoho CPaaS (formerly ZeptoMail)", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail" }, "tokens": { "markdown": 2950, "slim": 730 }, "version": 1 }