{ "data": { "a": { "slug": "loops", "name": "Loops API + MCP", "vendor": "Loops (Astrodon Corporation)", "vendorUrl": "https://loops.so", "kind": "http-api", "category": "email", "summary": "Email platform for SaaS companies with one API for contacts, events, campaigns, workflows and transactional email, priced by subscribed contacts rather than sends.", "url": "https://www.anchorterminal.com/tools/loops", "markdownUrl": "https://www.anchorterminal.com/tools/loops.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/loops.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/loops.json", "repo": "https://github.com/Loops-so/loops-js", "license": "MIT", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://app.loops.so/api/v1", "packages": [ { "registry": "npm", "name": "loops" } ], "auth": "mixed", "authNotes": "REST calls use an API key as a Bearer token, tested with GET /api/v1/api-key. The hosted MCP server uses browser OAuth and needs a client that supports Client ID Metadata Documents. No API key goes in the MCP config.", "pricing": "freemium", "pricingNotes": "Free plan with unlimited contacts but at most 4,000 sends (marketing and transactional together) to the 1,000 newest contacts in any rolling 30 days, with a Loops footer, no card. Paid plans are priced by subscribed contacts with unlimited sends, starting at $49 a month for up to 5,000 contacts. No per-seat or per-send charge (https://loops.so/pricing).", "priceSummary": "$49 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 or stablecoin payment path in docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 7, "npmWeekly": 459804, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://loops.so/docs", "llmsTxt": "https://loops.so/docs/llms.txt", "openapi": "https://app.loops.so/openapi.json", "registryName": "io.github.loops-so/loops", "capabilities": [ "email.send", "email.templates", "email.domains", "email.analytics", "email.marketing" ], "tags": [ "hosted", "freemium", "no-card", "mcp", "llms-txt", "openapi", "typescript", "webhooks" ], "lastRelease": "2026-09-03", "graded": true, "anchor": { "graded": true, "score": 62.7, "grade": "B", "agentReady": false, "rank": 327, "ranked": true, "rankOf": 722, "categoryRank": 9, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 66, "maintenance": 83, "payments": 30, "reliability": 90, "schema": 82, "security": 40, "transparency": 64 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": -3, "negativeNotes": [ "2026-09-17. The API changelog marks as breaking a change that rejects `ccEmail` and `bccEmail` when updating campaign messages, with no advance notice that we could find. -3 (https://loops.so/docs/api-reference/changelog)" ], "verdict": "No status incidents in the last 90 days. No scoped or read-only keys, and no read-only MCP mode.", "bestFor": "SaaS teams that send lifecycle and product email from one contact list and want an OAuth MCP.", "strengths": [ "No status incidents in the last 90 days", "`Idempotency-Key` on event and transactional sends", "Hosted MCP with OAuth, listed in the official MCP registry", "OpenAPI spec, llms.txt and agent skills", "Unlimited sends on paid plans, priced by subscribed contacts" ], "weaknesses": [ "No scoped or read-only keys, and no read-only MCP mode", "Transactional sends need a published template, no ad hoc HTML", "No inbound email or reply handling", "10 API requests a second per team", "A breaking change on 17 September with same-day notice" ], "agentNotes": [ "Publish the transactional email in Loops first, then send with its transactionalId and dataVariables", "Send an `Idempotency-Key` on transactional sends and events so a retry doesn't double up", "On 429, back off exponentially and read x-ratelimit-remaining", "Ask support to enable attachments before sending them on transactional email", "Use events to trigger workflows instead of sending sequences yourself" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 62.7 } ], "editorialScores": { "ergonomics": 66, "maintenance": 83, "payments": 30, "reliability": 90, "schema": 82, "security": 40, "transparency": 62 }, "provenanceScore": 66 }, "connect": { "http": "curl -X POST https://app.loops.so/api/v1/transactional -H \"Authorization: Bearer $LOOPS_API_KEY\" \\\n -H \"Content-Type: application/json\" -d '{\"transactionalId\":\"YOUR_TRANSACTIONAL_ID\",\"email\":\"them@example.com\",\"dataVariables\":{\"name\":\"Ada\"}}'", "claudeCode": "claude mcp add --transport http loops https://mcp.loops.so", "config": { "mcpServers": { "loops": { "type": "http", "url": "https://mcp.loops.so" } } } }, "letme": { "capability": "https://letme.dev/email.send", "tool": "https://letme.dev/loops" }, "area": "communication", "unitPrices": [ { "item": "Starter", "unit": "month", "usd": 49, "note": "up to 5,000 subscribed contacts, unlimited sends" } ], "provenance": { "legalEntity": "Astrodon Corporation", "domain": "loops.so", "domainRegistered": "", "domainNote": "The .so registry answered no RDAP query, so the registration date is unknown.", "endpointOnVendorDomain": true, "terms": "https://loops.so/terms", "privacy": "https://loops.so/privacy", "statusPage": "https://status.loops.so", "changelog": "https://loops.so/docs/api-reference/changelog", "securityTxt": "none", "checked": "2026-09-30", "score": 66 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/loops.json", "live": { "slug": "loops", "probe": { "target": "https://app.loops.so/api/v1", "method": "get", "lastAt": "2026-10-08T19:52:54.742007153Z", "lastOk": true, "lastStatus": 401, "lastMs": 142, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 157, "p95ms24h": 334, "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://status.loops.so", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-08T19:50:48.238231968Z" }, "versions": [ { "registry": "github", "name": "Loops-so/loops-js", "version": "v7.3.0", "released": "2026-09-03", "seenAt": "2026-10-08T16:19:26.488374508Z" }, { "registry": "mcp-registry", "name": "io.github.loops-so/loops", "version": "1.0.0", "seenAt": "2026-10-08T02:42:52.272076636Z" }, { "registry": "npm", "name": "loops", "version": "7.3.0", "seenAt": "2026-10-08T16:19:26.244921059Z" } ], "githubStars": 7, "npmWeekly": 413875, "securityTxt": { "url": "https://loops.so/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:29.983467372Z" }, "llmsTxt": { "url": "https://loops.so/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:34.996407339Z" }, "domain": { "domain": "loops.so", "checkedAt": "2026-10-04T13:07:57.071985276Z" }, "pages": [ { "url": "https://loops.so/docs/api-reference/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:21:41.514722933Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "89f86b168a72" }, { "url": "https://loops.so/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:21:43.966303163Z", "changedAt": "2026-10-05T15:58:00.718689056Z", "fingerprint": "e22a41cbc50a" }, { "url": "https://loops.so/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:21:45.66926244Z", "changedAt": "2026-10-05T15:58:02.674209188Z", "fingerprint": "c6039d0d0d63" }, { "url": "https://loops.so/terms", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:21:47.82214894Z", "changedAt": "2026-10-05T15:58:04.642525643Z", "fingerprint": "5779ec7dc942" } ], "updatedAt": "2026-10-08T19:52:54.742007153Z" } }, "answer": "Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) score within a point of each other on agent readiness, 62.7 (B) and 61.8 (C). Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust.", "b": { "slug": "zoho-zeptomail", "name": "Zoho CPaaS (formerly ZeptoMail)", "vendor": "Zoho Corporation", "vendorUrl": "https://www.zoho.com/cpaas/", "kind": "http-api", "category": "email", "summary": "Transactional email service from Zoho, renamed from ZeptoMail to Zoho CPaaS in September 2026. It sends application email through a REST API or SMTP relay, with templates, domain management, suppression lists, logs and webhooks.", "url": "https://www.anchorterminal.com/tools/zoho-zeptomail", "markdownUrl": "https://www.anchorterminal.com/tools/zoho-zeptomail.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/zoho-zeptomail.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/zoho-zeptomail.json", "license": "Proprietary service under the Zoho CPaaS terms of use. The Node SDK on npm is MIT", "transports": [ "http" ], "remoteUrl": "https://cpaas.zoho.com/v1.1", "packages": [ { "registry": "npm", "name": "zeptomail" } ], "auth": "mixed", "authNotes": "Sending takes a send key in the `Authorization` header with the prefix Zoho-enczapikey. Each Agent has its own keys, one set per channel, copied from the console's SMTP/API tab or created and deleted by API. Logs, domains, templates, agents and suppression lists take a Zoho OAuth 2.0 access token (authorisation code grant, one-hour tokens, refresh tokens) with per-resource scopes. Access is self-serve, but every new account passes a manual review that the docs say takes two business days.", "pricing": "usage", "pricingNotes": "$2.50 per email credit of 10,000 emails ($0.25 per 1,000), valid six months, counted per recipient. The first credit is free, and a sandbox Agent accepts 10,000 test emails a day without sending them. No monthly plan. Credits can be bought only after the account review. Dedicated IP $30 a month, billed annually. Prices are filled in by script from a public JSON file (https://www.zoho.com/cpaas/pricing.html).", "priceSummary": "$30 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the API docs, the OpenAPI file or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": 40110, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://www.zoho.com/cpaas/help/api/api-home.html", "llmsTxt": "https://www.zoho.com/cpaas/llms.txt", "openapi": "https://www.zohowebstatic.com/sites/zweb/json/api/cpaas/oas.json", "capabilities": [ "email.send", "email.templates", "email.domains", "email.analytics" ], "tags": [ "hosted", "usage", "openapi", "llms-txt", "oauth", "smtp", "webhooks", "sandbox", "typescript", "status-page", "bug-bounty", "soc2" ], "graded": true, "anchor": { "graded": true, "score": 61.8, "grade": "C", "agentReady": false, "rank": 356, "ranked": true, "rankOf": 722, "categoryRank": 10, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 55, "maintenance": 74, "payments": 40, "reliability": 41, "schema": 78, "security": 76, "transparency": 82 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "A public OpenAPI 3.0 file covers all 42 operations, and each Agent has its own send-only key. Email costs $2.50 per 10,000 with the first credit free. No API rate limit, 429 handling, idempotency key or SLA was found in the reviewed documentation, and new accounts wait for a manual review.", "bestFor": "Low-volume transactional senders who want prepaid credits without a monthly plan, and teams already on Zoho.", "strengths": [ "Public OpenAPI 3.0.3 file with 42 operations, plus llms.txt and a Markdown copy of every help page", "Send keys are per Agent and per channel and can only send. Management calls use OAuth with READ, CREATE, UPDATE and DELETE scopes per resource", "Published price of $2.50 per credit of 10,000 emails, valid six months, with the first credit free", "IP allow lists for sending, the REST API and the web console, and activity logs kept for one year", "The terms commit to a six-month deprecation period for a retired API version" ], "weaknesses": [ "No API rate limit, 429 behaviour or Retry-After was found in the reviewed documentation or the OpenAPI file", "No idempotency key on send. `client_reference` is a tracking label only", "Every new account is reviewed by Zoho staff, which the docs say takes two business days, before credits can be bought", "The only official SDK found is the Node package, last published on 29 May 2026 and still named zeptomail", "The OAuth guide puts the client secret and refresh token in the token URL's query string", "No inbound email, and no SLA was found" ], "agentNotes": [ "Call the base URL for the account's region (cpaas.zoho.com, .eu, .in, .com.au, .jp or .com.cn). A key from one region fails on another", "Send with `Authorization: Zoho-enczapikey \u003ckey\u003e`. Logs, domains, templates, agents and suppressions need a Zoho OAuth token as `Authorization: Zoho-oauthtoken \u003ctoken\u003e`", "Post OAuth client secrets and refresh tokens in the request body, not the query string the guide shows, so they stay out of logs", "Don't retry a timed-out send blindly. There is no idempotency key, so look the message up by `client_reference` in the email logs first", "Count one email per recipient, including cc and bcc, and keep each address field to 500 entries and each attachment to 15 MB", "Use a sandbox Agent for tests. It accepts up to 10,000 emails a day and sends none of them" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 61.8 } ], "editorialScores": { "ergonomics": 55, "maintenance": 74, "payments": 40, "reliability": 41, "schema": 78, "security": 76, "transparency": 69 }, "provenanceScore": 94 }, "connect": { "install": "npm install zeptomail", "http": "curl --request POST --url https://cpaas.zoho.com/v1.1/email \\\n --header 'Authorization: Zoho-enczapikey REPLACE_WITH_YOUR_KEY' \\\n --header 'content-type: application/json' \\\n --data '{\"from\":{\"address\":\"hello@yourapp.com\",\"name\":\"Your App\"},\"to\":[{\"email_address\":{\"address\":\"user@example.com\",\"name\":\"User\"}}],\"subject\":\"Test Email\",\"htmlbody\":\"\u003cp\u003eTest email sent successfully.\u003c/p\u003e\"}'" }, "letme": { "capability": "https://letme.dev/email.send", "tool": "https://letme.dev/zoho-zeptomail" }, "sameCompany": [ "zoho-books", "zoho-crm", "zoho-recruit", "zoho-people" ], "area": "communication", "unitPrices": [ { "item": "Email credit", "unit": "1k-emails", "usd": 0.25, "note": "$2.50 per credit of 10,000 emails, valid six months, counted per recipient. First credit free" }, { "item": "Dedicated IP", "unit": "month", "usd": 30, "note": "Billed annually, some data centres only" } ], "provenance": { "legalEntity": "Zoho Corporation", "domain": "zoho.com", "domainRegistered": "2004-01-16", "endpointOnVendorDomain": true, "terms": "https://www.zoho.com/cpaas/terms.html", "privacy": "https://www.zoho.com/privacy.html", "statusPage": "https://us.zohostatus.com/", "changelog": "https://www.zoho.com/cpaas/whats-new.html", "securityTxt": "valid", "checked": "2026-10-08", "notes": [ "The Zoho CPaaS terms of use name the contracting party as the Zoho entity for the customer's region. That is Zoho Corporation for the United States and Zoho Corporation Private Limited for India (https://www.zoho.com/legal/zoho-contracting-entities.html).", "The privacy field points at Zoho's privacy policy, last updated 22 December 2025, whose Part II covers the data customers process through Zoho services. Zoho CPaaS has no privacy policy of its own.", "status.zoho.com redirects to us.zohostatus.com, which lists Zepto Mail, Zepto Mail-SMTP and Zepto Mail-SMTP (PORT:465) under the old name. Other regions have their own status sites.", "www.zoho.com/.well-known/security.txt names security@zohocorp.com and the bug bounty, and expires on 30 June 2028. cpaas.zoho.com/.well-known/security.txt returns 403.", "RDAP for zoho.com gives a registration date of 2004-01-16." ], "score": 94 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/zoho-zeptomail.json", "live": { "slug": "zoho-zeptomail", "probe": { "target": "https://cpaas.zoho.com/v1.1", "method": "get", "lastAt": "2026-10-08T19:53:07.788146603Z", "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": "Loops (Astrodon Corporation)", "b": "Zoho Corporation", "name": "Vendor" }, { "a": "https://app.loops.so/api/v1", "b": "https://cpaas.zoho.com/v1.1", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Pay per use", "name": "Pricing" }, { "a": "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": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "io.github.loops-so/loops", "b": "not listed", "name": "MCP registry" }, { "a": "2026-09-03", "b": "none", "name": "Last release" }, { "a": "2025-12-15", "b": "no date given", "name": "Terms last updated" }, { "a": "2025-05-15", "b": "2025-12-22", "name": "Privacy policy last updated" }, { "a": "yes", "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": "not found in the text", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "7 stars, 460k npm/wk", "b": "40k npm/wk", "name": "Popularity" }, { "a": "3.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) score within a point of each other on agent readiness, 62.7 (B) and 61.8 (C). Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust.", "question": "Which is better for AI agents, Loops API + MCP or Zoho CPaaS (formerly ZeptoMail)?" }, { "answer": "Both take an API key or an OAuth sign-in.", "question": "Do Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) need an API key?" }, { "answer": "Yes. Loops API + MCP has a hosted endpoint at https://app.loops.so/api/v1 and Zoho CPaaS (formerly ZeptoMail) at https://cpaas.zoho.com/v1.1.", "question": "Can an agent call Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 90 against 41", "Agent ergonomics, 66 against 55", "Maintenance \u0026 community, 83 against 74" ], "also": [ "Free to start without a card" ], "goodFor": "SaaS teams that send lifecycle and product email from one contact list and want an OAuth MCP.", "slug": "loops", "watchFor": "No scoped or read-only keys, and no read-only MCP mode" }, { "aheadOn": [ "Security \u0026 auth, 76 against 40", "Payments \u0026 pricing, 40 against 30", "Transparency \u0026 trust, 82 against 64" ], "also": [ "No incidents deducted, where Loops API + MCP loses 3 points for them" ], "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-loops.json", "title": "Amazon SES vs Loops API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-loops" }, { "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-loops.json", "title": "Brevo API + MCP vs Loops API + MCP", "url": "https://www.anchorterminal.com/compare/brevo-vs-loops" }, { "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-zoho-zeptomail.json", "title": "Cloudflare Email Service vs Zoho CPaaS (formerly ZeptoMail)", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail" }, { "json": "https://www.anchorterminal.com/compare/loops-vs-mailersend.json", "title": "Loops API + MCP vs MailerSend", "url": "https://www.anchorterminal.com/compare/loops-vs-mailersend" }, { "json": "https://www.anchorterminal.com/compare/loops-vs-mailgun.json", "title": "Loops API + MCP vs Mailgun API + MCP", "url": "https://www.anchorterminal.com/compare/loops-vs-mailgun" }, { "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-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-mandrill.json", "title": "Loops API + MCP vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/loops-vs-mandrill" }, { "json": "https://www.anchorterminal.com/compare/loops-vs-postmark.json", "title": "Loops API + MCP vs Postmark API + MCP", "url": "https://www.anchorterminal.com/compare/loops-vs-postmark" }, { "json": "https://www.anchorterminal.com/compare/loops-vs-resend.json", "title": "Loops API + MCP vs Resend API + MCP", "url": "https://www.anchorterminal.com/compare/loops-vs-resend" }, { "json": "https://www.anchorterminal.com/compare/loops-vs-sendgrid.json", "title": "Loops API + MCP vs Twilio SendGrid", "url": "https://www.anchorterminal.com/compare/loops-vs-sendgrid" }, { "json": "https://www.anchorterminal.com/compare/loops-vs-smtp2go.json", "title": "Loops API + MCP vs SMTP2GO API + MCP", "url": "https://www.anchorterminal.com/compare/loops-vs-smtp2go" }, { "json": "https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.json", "title": "MailerSend vs Zoho CPaaS (formerly ZeptoMail)", "url": "https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail" }, { "json": "https://www.anchorterminal.com/compare/mailgun-vs-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": 49, "edge": "loops", "key": "reliability", "loops": 90, "name": "Reliability", "weight": 16, "zoho-zeptomail": 41 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 4, "edge": "loops", "key": "schema", "loops": 82, "name": "Schema \u0026 documentation", "weight": 13, "zoho-zeptomail": 78 }, { "by": 11, "edge": "loops", "key": "ergonomics", "loops": 66, "name": "Agent ergonomics", "weight": 13, "zoho-zeptomail": 55 }, { "by": 36, "edge": "zoho-zeptomail", "key": "security", "loops": 40, "name": "Security \u0026 auth", "weight": 14, "zoho-zeptomail": 76 }, { "by": 10, "edge": "zoho-zeptomail", "key": "payments", "loops": 30, "name": "Payments \u0026 pricing", "weight": 10, "zoho-zeptomail": 40 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 9, "edge": "loops", "key": "maintenance", "loops": 83, "name": "Maintenance \u0026 community", "weight": 7, "zoho-zeptomail": 74 }, { "by": 18, "edge": "zoho-zeptomail", "key": "transparency", "loops": 64, "name": "Transparency \u0026 trust", "weight": 7, "zoho-zeptomail": 82 } ], "summary": "Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) score within a point of each other on agent readiness, 62.7 (B) and 61.8 (C). Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust. Both do email send.", "verdicts": { "loops": "No status incidents in the last 90 days. No scoped or read-only keys, and no read-only MCP mode.", "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/loops-vs-zoho-zeptomail", "json": "https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.md", "slim": "https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.min.md" }, "markdown": "Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) score within a point of each other on agent readiness, 62.7 (B) and 61.8 (C). Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust. Both do email send.\n\n- Loops API + MCP: grade B, 62.7/100, rank #327 of 722. Markdown https://www.anchorterminal.com/tools/loops.md · JSON https://www.anchorterminal.com/api/v1/tools/loops.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### Loops API + MCP (B)\n\nGood for: SaaS teams that send lifecycle and product email from one contact list and want an OAuth MCP.\n\nAhead on:\n- Reliability, 90 against 41\n- Agent ergonomics, 66 against 55\n- Maintenance \u0026 community, 83 against 74\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: No scoped or read-only keys, and no read-only MCP 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 40\n- Payments \u0026 pricing, 40 against 30\n- Transparency \u0026 trust, 82 against 64\n\nAlso in its favour:\n- No incidents deducted, where Loops API + MCP loses 3 points for them\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 | Loops API + MCP | Zoho CPaaS (formerly ZeptoMail) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 90 | 41 | Loops API + MCP +49 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 82 | 78 | Loops API + MCP +4 |\n| Agent ergonomics | 13% (16.2 this run) | 66 | 55 | Loops API + MCP +11 |\n| Security \u0026 auth | 14% (17.5 this run) | 40 | 76 | Zoho CPaaS (formerly ZeptoMail) +36 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 40 | Zoho CPaaS (formerly ZeptoMail) +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 74 | Loops API + MCP +9 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 64 | 82 | Zoho CPaaS (formerly ZeptoMail) +18 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **62.7 · B** | **61.8 · C** | |\n\n## Facts side by side\n\n| Fact | Loops API + MCP | Zoho CPaaS (formerly ZeptoMail) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Loops (Astrodon Corporation) | Zoho Corporation |\n| Hosted endpoint | `https://app.loops.so/api/v1` | `https://cpaas.zoho.com/v1.1` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | MIT | 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| MCP registry | `io.github.loops-so/loops` | not listed |\n| Last release | 2026-09-03 | none |\n| Terms last updated | 2025-12-15 | no date given |\n| Privacy policy last updated | 2025-05-15 | 2025-12-22 |\n| Customer content may train models | yes | 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 | not found in the text | not found in the text |\n| Popularity | 7 stars, 460k npm/wk | 40k npm/wk |\n| Agent reviews | 3.5/5 (2) | none |\n\n## Verdicts\n\n**Loops API + MCP.** No status incidents in the last 90 days. No scoped or read-only keys, and no read-only MCP mode.\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### Loops API + MCP\n\n1. Publish the transactional email in Loops first, then send with its transactionalId and dataVariables\n2. Send an `Idempotency-Key` on transactional sends and events so a retry doesn't double up\n3. On 429, back off exponentially and read x-ratelimit-remaining\n4. Ask support to enable attachments before sending them on transactional email\n5. Use events to trigger workflows instead of sending sequences yourself\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, Loops API + MCP or Zoho CPaaS (formerly ZeptoMail)?\n\nLoops API + MCP and Zoho CPaaS (formerly ZeptoMail) score within a point of each other on agent readiness, 62.7 (B) and 61.8 (C). Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust.\n\n### Do Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) without installing anything?\n\nYes. Loops API + MCP has a hosted endpoint at https://app.loops.so/api/v1 and Zoho CPaaS (formerly ZeptoMail) at https://cpaas.zoho.com/v1.1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.json, and with the fewest tokens: https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"loops\", \"b\": \"zoho-zeptomail\"}`. From a terminal: `anchor compare loops zoho-zeptomail`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/loops.json and https://www.anchorterminal.com/api/v1/tools/zoho-zeptomail.json\n\n## Other comparisons with Loops API + MCP or Zoho CPaaS (formerly ZeptoMail)\n\n- [Amazon SES vs Loops API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-loops.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 Loops API + MCP](https://www.anchorterminal.com/compare/brevo-vs-loops.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 Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-zoho-zeptomail.md)\n- [Loops API + MCP vs MailerSend](https://www.anchorterminal.com/compare/loops-vs-mailersend.md)\n- [Loops API + MCP vs Mailgun API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailgun.md)\n- [Loops API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailjet.md)\n- [Loops API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailtrap.md)\n- [Loops API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/loops-vs-mandrill.md)\n- [Loops API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/loops-vs-postmark.md)\n- [Loops API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/loops-vs-resend.md)\n- [Loops API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/loops-vs-sendgrid.md)\n- [Loops API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/loops-vs-smtp2go.md)\n- [MailerSend vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailersend-vs-zoho-zeptomail.md)\n- [Mailgun API + MCP vs 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": "Loops API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "url": "" } ], "description": "Loops API + MCP and Zoho CPaaS (formerly ZeptoMail) score within a point of each other on agent readiness, 62.7 (B) and 61.8 (C). Zoho CPaaS (formerly ZeptoMail) leads on security \u0026 auth, payments \u0026 pricing and transparency \u0026 trust. Both do email send. Category scores, facts…", "facts": [ "Loops API + MCP B 62.7", "Zoho CPaaS (formerly ZeptoMail) C 61.8", "scores" ], "h1": "Loops API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "image": "https://www.anchorterminal.com/assets/og/compare-loops-vs-zoho-zeptomail.png", "path": "/compare/loops-vs-zoho-zeptomail", "published": "2026-10-01", "section": "tools", "title": "Loops API + MCP vs Zoho CPaaS (formerly ZeptoMail) for AI agents", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/loops-vs-zoho-zeptomail" }, "tokens": { "markdown": 2550, "slim": 680 }, "version": 1 }