{ "data": { "a": { "slug": "mailgun", "name": "Mailgun API + MCP", "vendor": "Mailgun (Sinch)", "vendorUrl": "https://www.mailgun.com", "kind": "http-api", "category": "email", "summary": "Email sending API with inbound routes, a Forwards API, templates, mailing lists, suppressions and address validation, in US and EU regions.", "url": "https://www.anchorterminal.com/tools/mailgun", "markdownUrl": "https://www.anchorterminal.com/tools/mailgun.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mailgun.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mailgun.json", "repo": "https://github.com/mailgun/mailgun-mcp-server", "license": "Apache-2.0", "transports": [ "http", "stdio" ], "remoteUrl": "https://api.mailgun.net/v3", "packages": [ { "registry": "npm", "name": "mailgun.js" }, { "registry": "pypi", "name": "mailgun" }, { "registry": "npm", "name": "@mailgun/mcp-server" } ], "auth": "api-key", "authNotes": "HTTP Basic auth with the username `api` and the API key as password. Role-based keys limit what each key can do. EU accounts use api.eu.mailgun.net. The MCP server reads `MAILGUN_API_KEY` and `MAILGUN_API_REGION` from its environment.", "pricing": "freemium", "pricingNotes": "Free plan with 100 emails a day, 1 custom domain, 1 inbound route and 1 day of logs. Basic $15 a month for 10,000 emails, overage $1.80 per 1,000. Foundation $35 for 50,000 (overage $1.30, first month free). Scale $90 for 100,000 (overage $1.10 falling to $0.40 at 2.5 million), with a dedicated IP and 5,000 validations. Validations from $1.20 per 100 (https://www.mailgun.com/pricing/).", "priceSummary": "$15 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402 support in docs, pricing or MCP README (checked 2026-09-30).", "endpoints": [] }, "toolCount": 74, "popularity": { "githubStars": 62, "npmWeekly": 1321769, "pypiWeekly": 61238, "asOf": "2026-09-30" }, "docsUrl": "https://documentation.mailgun.com", "llmsTxt": "https://documentation.mailgun.com/llms.txt", "openapi": "https://documentation.mailgun.com/_bundle/docs/mailgun/api-reference/send/mailgun.yaml", "capabilities": [ "email.send", "email.inbound", "email.templates", "email.domains", "email.analytics" ], "tags": [ "hosted", "freemium", "mcp", "llms-txt", "openapi", "typescript", "python", "webhooks" ], "lastRelease": "2026-09-21", "graded": true, "anchor": { "graded": true, "score": 66.2, "grade": "B", "agentReady": false, "rank": 242, "ranked": true, "rankOf": 722, "categoryRank": 7, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 60, "maintenance": 87, "payments": 40, "reliability": 57, "schema": 83, "security": 74, "transparency": 69 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Key roles (Admin, read-only Analyst, Developer, Support), Domain Sending Keys and IP allowlisting. 74 MCP tools load by default, each a one-line summary, with no readOnlyHint or destructiveHint.", "bestFor": "Teams that want inbound routing, validation and per-key roles in one account, in US or EU regions.", "strengths": [ "Key roles (Admin, read-only Analyst, Developer, Support), Domain Sending Keys and IP allowlisting", "OpenAPI 3.1 specs for `send`, `validate`, `optimize` and `inspect`, plus llms.txt", "Inbound routes and a Forwards API (May 2026) for incoming mail", "SOC 2 Type II and ISO 27001, with a third-party bug bounty", "Weekly release notes through September 2026 and MCP CI on Node 20, 22 and 24" ], "weaknesses": [ "74 MCP tools load by default, each a one-line summary, with no readOnlyHint or destructiveHint", "12 status incidents since 10 July, including 93 minutes of US validation API errors", "No general API rate limit published and no idempotency key for sends", "Free plan keeps logs for 1 day and allows 1 inbound route", "No security.txt" ], "agentNotes": [ "Give an agent that only sends a Domain Sending Key, which can only POST /messages for one domain", "Start the MCP with `--tags validate,inspect` when you don't need the 70 send-tagged tools", "Set `MAILGUN_API_REGION=eu` for EU accounts, which live on api.eu.mailgun.net", "Add `o:testmode=yes` to check a send without delivering it", "Verify a custom domain first. The sandbox domain reaches only 5 authorised recipients" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 66.2 } ], "editorialScores": { "ergonomics": 60, "maintenance": 87, "payments": 40, "reliability": 57, "schema": 83, "security": 74, "transparency": 64 }, "provenanceScore": 73 }, "connect": { "http": "curl -s --user \"api:$MAILGUN_API_KEY\" \"https://api.mailgun.net/v3/$MAILGUN_DOMAIN/messages\" \\\n -F from=\"Test \u003cpostmaster@$MAILGUN_DOMAIN\u003e\" -F to=you@example.com \\\n -F subject=\"Hello\" -F text=\"Testing Mailgun\"", "claudeCode": "claude mcp add mailgun -e MAILGUN_API_KEY=$MAILGUN_API_KEY -- npx -y @mailgun/mcp-server", "config": { "mcpServers": { "mailgun": { "args": [ "-y", "@mailgun/mcp-server" ], "command": "npx", "env": { "MAILGUN_API_KEY": "${MAILGUN_API_KEY}", "MAILGUN_API_REGION": "us" } } } } }, "letme": { "capability": "https://letme.dev/email.send", "tool": "https://letme.dev/mailgun" }, "area": "communication", "unitPrices": [ { "item": "Basic", "unit": "month", "usd": 15, "note": "10,000 emails" }, { "item": "Foundation", "unit": "month", "usd": 35, "note": "50,000 emails" }, { "item": "Scale", "unit": "month", "usd": 90, "note": "100,000 emails, 1 dedicated IP" }, { "item": "Overage on Basic", "unit": "1k-emails", "usd": 1.8 }, { "item": "Overage on Foundation", "unit": "1k-emails", "usd": 1.3 }, { "item": "Overage on Scale", "unit": "1k-emails", "usd": 1.1, "note": "falls to $0.40 at 2.5 million" } ], "provenance": { "legalEntity": "Mailgun Technologies, Inc.", "domain": "mailgun.com", "domainRegistered": "2003-12-20", "domainNote": "mailgun.com was registered in 2003, years before Mailgun launched in 2010.", "endpointOnVendorDomain": false, "terms": "https://www.mailgun.com/legal/terms/", "privacy": "https://www.mailgun.com/legal/privacy-policy/", "statusPage": "https://status.mailgun.com", "changelog": "https://documentation.mailgun.com/docs/mailgun/release/release-notes", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "The API is served from mailgun.net, not mailgun.com.", "The terms name Sinch Email and the entity on the service order rather than a single company." ], "score": 73 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/mailgun.json", "live": { "slug": "mailgun", "probe": { "target": "https://api.mailgun.net/v3", "method": "get", "lastAt": "2026-10-08T21:12:14.675248753Z", "lastOk": true, "lastStatus": 404, "lastMs": 272, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 431, "p95ms24h": 529, "samples24h": 271, "samples30d": 2157, "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": 239, "ok": 239 } ] }, "vendorStatus": { "page": "https://status.mailgun.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-08T21:06:11.792768595Z" }, "versions": [ { "registry": "github", "name": "mailgun/mailgun-mcp-server", "version": "v2.1.3", "released": "2026-09-16", "seenAt": "2026-10-08T16:19:36.449835181Z" }, { "registry": "npm", "name": "@mailgun/mcp-server", "version": "2.1.3", "seenAt": "2026-10-08T16:19:34.851701385Z" }, { "registry": "npm", "name": "mailgun.js", "version": "14.1.0", "seenAt": "2026-10-08T16:19:34.21932814Z" }, { "registry": "pypi", "name": "mailgun", "version": "1.9.1", "released": "2026-09-21", "seenAt": "2026-10-08T16:19:34.575243526Z" } ], "githubStars": 62, "npmWeekly": 1325863, "pypiWeekly": 54909, "securityTxt": { "url": "https://mailgun.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:46.117930308Z" }, "llmsTxt": { "url": "https://documentation.mailgun.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:35.451274216Z" }, "domain": { "domain": "mailgun.com", "registered": "2003-12-20", "source": "https://rdap.verisign.com/com/v1/domain/mailgun.com", "checkedAt": "2026-10-04T13:05:38.739240418Z" }, "pages": [ { "url": "https://documentation.mailgun.com/docs/mailgun/release/release-notes", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:19:58.332283375Z", "changedAt": "2026-10-08T18:19:58.332283375Z", "fingerprint": "02e322cd420f" }, { "url": "https://www.mailgun.com/pricing/", "kind": "pricing", "status": 304, "checkedAt": "2026-10-08T18:28:59.565198483Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "dbcce09b527b" }, { "url": "https://www.mailgun.com/legal/privacy-policy/", "kind": "privacy", "status": 304, "checkedAt": "2026-10-08T18:28:55.525463475Z", "changedAt": "2026-10-02T15:27:12.688197359Z", "fingerprint": "213ddc77ab01" }, { "url": "https://www.mailgun.com/legal/terms/", "kind": "terms", "status": 304, "checkedAt": "2026-10-08T18:28:57.5620461Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "e68fb8d6980b" } ], "updatedAt": "2026-10-08T21:12:14.675248753Z" } }, "answer": "Mailgun API + MCP scores 66.2 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 5 of 7 scored categories.", "b": { "slug": "mandrill", "name": "Mailchimp Transactional (Mandrill)", "vendor": "Intuit Mailchimp", "vendorUrl": "https://mailchimp.com/features/transactional-email/", "kind": "http-api", "category": "email", "summary": "Transactional email service from Intuit Mailchimp, formerly Mandrill. It sends application email and SMS through an HTTP API, SMTP or a hosted MCP server, with templates, inbound routing, webhooks and reporting, as a paid add-on to a Mailchimp plan.", "url": "https://www.anchorterminal.com/tools/mandrill", "markdownUrl": "https://www.anchorterminal.com/tools/mandrill.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mandrill.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mandrill.json", "repo": "https://github.com/mailchimp/mailchimp-client-lib-codegen", "license": "Proprietary service under Mailchimp's Standard Terms of Use and Additional Terms. The client libraries are under Mailchimp's own client library licence agreement", "transports": [ "http" ], "remoteUrl": "https://mandrillapp.com/api/1.4", "packages": [ { "registry": "npm", "name": "@mailchimp/mailchimp_transactional" }, { "registry": "pypi", "name": "mailchimp-transactional" } ], "auth": "api-key", "authNotes": "Self-serve API key, created in the Transactional web app at mandrillapp.com/settings by an Owner or Admin of the Mailchimp account. The key goes in the JSON body of every POST as `key`, and the MCP server takes it as `Authorization: Bearer`. A key can be limited to chosen endpoints and to IP addresses, and a restricted key needs the AI Agents permission group to use the MCP server. Test keys work only in test mode. There is no OAuth for this API.", "pricing": "paid", "pricingNotes": "$20 per block of 25,000 emails a month for 1 to 20 blocks, falling in steps to $10 at 161 blocks or more, on top of a Standard or Premium Mailchimp marketing plan. Blocks are billed monthly in advance and unused emails do not roll over. A dedicated IP is $29.95 a month. An agent's owner can start without a contract through the demo, which gives 500 emails once to the account's own verified domain on any Mailchimp account, free plan included. Test keys send nothing and cost nothing (https://mailchimp.com/pricing/transactional-email/).", "priceSummary": "$29.95 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the developer docs, the OpenAPI file or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": 9, "popularity": { "githubStars": null, "npmWeekly": 226039, "pypiWeekly": 132016, "asOf": "2026-10-08" }, "docsUrl": "https://mailchimp.com/developer/transactional/docs/fundamentals/", "llmsTxt": "https://mailchimp.com/developer/transactional/llms.txt", "openapi": "https://mailchimp.com/developer/openapi/api-reference-2.json", "capabilities": [ "email.send", "email.templates", "email.inbound", "email.domains", "email.analytics" ], "tags": [ "hosted", "paid", "mcp", "openapi", "llms-txt", "api-key", "smtp", "webhooks", "inbound", "sandbox", "typescript", "python", "status-page", "soc2" ], "lastRelease": "2026-03-24", "graded": true, "anchor": { "graded": true, "score": 58.1, "grade": "C", "agentReady": false, "rank": 459, "ranked": true, "rankOf": 722, "categoryRank": 12, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 60, "maintenance": 28, "payments": 35, "reliability": 53, "schema": 79, "security": 68, "transparency": 71 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "A public OpenAPI 3.1 file covers all 99 operations, the docs serve Markdown and llms.txt, and keys can be limited by endpoint and IP address. Sending needs a Standard or Premium Mailchimp plan plus $20 blocks of 25,000 emails. No send idempotency key or SLA was found, and the newest dated release is from 24 March 2026.", "bestFor": "Teams already paying for Mailchimp Standard or Premium that want transactional mail, inbound parsing and an MCP server on the same account.", "strengths": [ "OpenAPI 3.1 file for all 99 operations, with typed error bodies for 401, 402, 404, 422, 429 and 500", "Hosted MCP server at `https://mandrillapp.com/mcp` with 9 tools, three of which list, describe and call API endpoints", "API keys can be limited to named endpoints and to IP addresses, and test keys send nothing", "Every docs page has a Markdown copy at the same URL plus `.md`, with an llms.txt index", "Status page lists Mailchimp Transactional as its own component with month-by-month event history" ], "weaknesses": [ "Full use needs a Standard or Premium Mailchimp marketing plan in addition to the email blocks", "No idempotency key on `/messages/send`, and no `Retry-After` header found in the docs or the specification", "Three delivery-delay incidents in September 2026, two of them lasting more than four hours", "The newest client library and specification release is 24 March 2026, and the changelog's newest entry is 19 August 2025", "The docs give three API version paths (1.0, 1.3 and 1.4), and the llms.txt link to the OpenAPI file returns 404" ], "agentNotes": [ "Send every call as POST with the key in the JSON body as `key`. The MCP server takes the same key as `Authorization: Bearer`", "Use a test API key while building. Test sends are free, capped at 10,000 a day, and deliver nothing", "Verify the sending domain with DKIM and DMARC first. Mail from an unverified domain is rejected with the reason `unsigned`", "Keep `/messages/search` under 20 calls a minute and set `limit` (default 100, maximum 1,000). There is no offset, so use an activity export for more", "For a restricted key that must also use the MCP server, enable the AI Agents permission group on the key" ], "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": 58.1 } ], "editorialScores": { "ergonomics": 60, "maintenance": 28, "payments": 35, "reliability": 53, "schema": 79, "security": 68, "transparency": 64 }, "provenanceScore": 77 }, "connect": { "install": "npm install @mailchimp/mailchimp_transactional", "http": "curl -sS -X POST \"https://mandrillapp.com/api/1.0/users/ping\" \\\n --header 'Content-Type: application/json' \\\n --data-raw '{ \"key\": \"YOUR_API_KEY\" }'", "claudeCode": "claude mcp add --transport http mctx-mcp https://mandrillapp.com/mcp \\\n -H \"Authorization: Bearer YOUR_API_KEY\"", "config": { "mcpServers": { "mctx-mcp": { "headers": { "Authorization": "Bearer YOUR_API_KEY" }, "type": "http", "url": "https://mandrillapp.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/email.send", "tool": "https://letme.dev/mandrill" }, "area": "communication", "unitPrices": [ { "item": "Email block, 1 to 20 blocks", "unit": "1k-emails", "usd": 0.8, "note": "$20 per block of 25,000 emails, billed monthly, unused emails do not roll over. Needs a Standard or Premium Mailchimp plan" }, { "item": "Email block, 21 to 40 blocks", "unit": "1k-emails", "usd": 0.72, "note": "$18 per block of 25,000" }, { "item": "Email block, 41 to 80 blocks", "unit": "1k-emails", "usd": 0.64, "note": "$16 per block of 25,000" }, { "item": "Email block, 81 to 120 blocks", "unit": "1k-emails", "usd": 0.56, "note": "$14 per block of 25,000" }, { "item": "Email block, 121 to 160 blocks", "unit": "1k-emails", "usd": 0.48, "note": "$12 per block of 25,000" }, { "item": "Email block, 161 blocks or more", "unit": "1k-emails", "usd": 0.4, "note": "$10 per block of 25,000" }, { "item": "Dedicated IP", "unit": "month", "usd": 29.95 } ], "provenance": { "legalEntity": "The Rocket Science Group LLC d/b/a Mailchimp", "domain": "mailchimp.com", "domainRegistered": "2001-06-29", "endpointOnVendorDomain": false, "terms": "https://mailchimp.com/legal/terms/", "privacy": "https://www.intuit.com/privacy/statement/", "statusPage": "https://status.mailchimp.com", "changelog": "https://mailchimp.com/developer/release-notes/", "securityTxt": "valid", "checked": "2026-10-08", "notes": [ "The Standard Terms of Use, updated and effective 10 October 2025, name The Rocket Science Group LLC d/b/a Mailchimp, 405 N Angier Ave. NE, Atlanta, Georgia, part of the Intuit group with Intuit Inc. as parent.", "Transactional Email is also governed by the section For Transactional Email (formerly Mandrill) of the Additional Terms at https://mailchimp.com/legal/additional-terms/, which the Standard Terms incorporate, and by the API Use Policy updated 1 August 2023.", "The privacy field points at the Intuit Global Privacy Statement, last updated 9 March 2026. Mailchimp's terms name it as the privacy document for the service, mailchimp.com/legal/privacy redirects to it, and it names The Rocket Science Group LLC d/b/a Mailchimp. Mailchimp publishes no separate privacy policy.", "The API and the MCP server are served from mandrillapp.com, registered 2011-09-01, not from mailchimp.com (RDAP, Verisign).", "mailchimp.com/.well-known/security.txt holds one Contact line that points at the responsible disclosure section of the security page, with no Expires field. mandrillapp.com has no security.txt (404).", "The changelog covers the Marketing and Transactional APIs together. Its newest entry is dated 19 August 2025." ], "score": 77 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/mandrill.json", "live": { "slug": "mandrill", "probe": { "target": "https://mandrillapp.com/api/1.4", "method": "get", "lastAt": "2026-10-08T21:12:14.861311294Z", "lastOk": true, "lastStatus": 404, "lastMs": 421, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 426, "p95ms24h": 456, "samples24h": 21, "samples30d": 21, "days": [ { "date": "2026-10-08", "probes": 21, "ok": 21 } ] }, "vendorStatus": { "page": "https://status.mailchimp.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:38:46.313674676Z" }, "updatedAt": "2026-10-08T21:12:14.861311294Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Mailgun (Sinch)", "b": "Intuit Mailchimp", "name": "Vendor" }, { "a": "https://api.mailgun.net/v3", "b": "https://mandrillapp.com/api/1.4", "name": "Hosted endpoint" }, { "a": "HTTP, stdio", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Apache-2.0", "b": "Proprietary service under Mailchimp's Standard Terms of Use and Additional Terms. The client libraries are under Mailchimp's own client library licence agreement", "name": "Licence" }, { "a": "74", "b": "9", "name": "Tools exposed" }, { "a": "yes", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-09-21", "b": "2026-03-24", "name": "Last release" }, { "a": "no date given", "b": "no date given", "name": "Terms last updated" }, { "a": "no date given", "b": "2026-03-09", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "yes", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "62 stars, 1.3M npm/wk, 61k PyPI/wk", "b": "226k npm/wk, 132k PyPI/wk", "name": "Popularity" }, { "a": "3/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Mailgun API + MCP scores 66.2 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 5 of 7 scored categories.", "question": "Which is better for AI agents, Mailgun API + MCP or Mailchimp Transactional (Mandrill)?" }, { "answer": "Both need an API key.", "question": "Do Mailgun API + MCP and Mailchimp Transactional (Mandrill) need an API key?" }, { "answer": "Yes. Mailgun API + MCP has a hosted endpoint at https://api.mailgun.net/v3 and Mailchimp Transactional (Mandrill) at https://mandrillapp.com/api/1.4.", "question": "Can an agent call Mailgun API + MCP and Mailchimp Transactional (Mandrill) without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Security \u0026 auth, 74 against 68", "Payments \u0026 pricing, 40 against 35", "Maintenance \u0026 community, 87 against 28" ], "also": [ "Runs on your own machine" ], "goodFor": "Teams that want inbound routing, validation and per-key roles in one account, in US or EU regions.", "slug": "mailgun", "watchFor": "74 MCP tools load by default, each a one-line summary, with no readOnlyHint or destructiveHint" }, { "aheadOn": null, "also": null, "goodFor": "Teams already paying for Mailchimp Standard or Premium that want transactional mail, inbound parsing and an MCP server on the same account.", "slug": "mandrill", "watchFor": "Full use needs a Standard or Premium Mailchimp marketing plan in addition to the email blocks" } ], "job": { "capability": "email.send", "name": "Email send" }, "others": [ { "json": "https://www.anchorterminal.com/compare/amazon-ses-vs-mailgun.json", "title": "Amazon SES vs Mailgun API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-mailgun" }, { "json": "https://www.anchorterminal.com/compare/amazon-ses-vs-mandrill.json", "title": "Amazon SES vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-mandrill" }, { "json": "https://www.anchorterminal.com/compare/brevo-vs-mailgun.json", "title": "Brevo API + MCP vs Mailgun API + MCP", "url": "https://www.anchorterminal.com/compare/brevo-vs-mailgun" }, { "json": "https://www.anchorterminal.com/compare/brevo-vs-mandrill.json", "title": "Brevo API + MCP vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/brevo-vs-mandrill" }, { "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-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/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-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/mailersend-vs-mailgun.json", "title": "MailerSend vs Mailgun API + MCP", "url": "https://www.anchorterminal.com/compare/mailersend-vs-mailgun" }, { "json": "https://www.anchorterminal.com/compare/mailersend-vs-mandrill.json", "title": "MailerSend vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/mailersend-vs-mandrill" }, { "json": "https://www.anchorterminal.com/compare/mailgun-vs-mailjet.json", "title": "Mailgun API + MCP vs Mailjet API + MCP", "url": "https://www.anchorterminal.com/compare/mailgun-vs-mailjet" }, { "json": "https://www.anchorterminal.com/compare/mailgun-vs-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-postmark.json", "title": "Mailgun API + MCP vs Postmark API + MCP", "url": "https://www.anchorterminal.com/compare/mailgun-vs-postmark" }, { "json": "https://www.anchorterminal.com/compare/mailgun-vs-resend.json", "title": "Mailgun API + MCP vs Resend API + MCP", "url": "https://www.anchorterminal.com/compare/mailgun-vs-resend" }, { "json": "https://www.anchorterminal.com/compare/mailgun-vs-sendgrid.json", "title": "Mailgun API + MCP vs Twilio SendGrid", "url": "https://www.anchorterminal.com/compare/mailgun-vs-sendgrid" }, { "json": "https://www.anchorterminal.com/compare/mailgun-vs-smtp2go.json", "title": "Mailgun API + MCP vs SMTP2GO API + MCP", "url": "https://www.anchorterminal.com/compare/mailgun-vs-smtp2go" }, { "json": "https://www.anchorterminal.com/compare/mailgun-vs-zoho-zeptomail.json", "title": "Mailgun API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "url": "https://www.anchorterminal.com/compare/mailgun-vs-zoho-zeptomail" }, { "json": "https://www.anchorterminal.com/compare/mailjet-vs-mandrill.json", "title": "Mailjet API + MCP vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/mailjet-vs-mandrill" }, { "json": "https://www.anchorterminal.com/compare/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/mandrill-vs-postmark.json", "title": "Mailchimp Transactional (Mandrill) vs Postmark API + MCP", "url": "https://www.anchorterminal.com/compare/mandrill-vs-postmark" }, { "json": "https://www.anchorterminal.com/compare/mandrill-vs-resend.json", "title": "Mailchimp Transactional (Mandrill) vs Resend API + MCP", "url": "https://www.anchorterminal.com/compare/mandrill-vs-resend" }, { "json": "https://www.anchorterminal.com/compare/mandrill-vs-sendgrid.json", "title": "Mailchimp Transactional (Mandrill) vs Twilio SendGrid", "url": "https://www.anchorterminal.com/compare/mandrill-vs-sendgrid" }, { "json": "https://www.anchorterminal.com/compare/mandrill-vs-smtp2go.json", "title": "Mailchimp Transactional (Mandrill) vs SMTP2GO API + MCP", "url": "https://www.anchorterminal.com/compare/mandrill-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" } ], "scores": [ { "by": 4, "edge": "mailgun", "key": "reliability", "mailgun": 57, "mandrill": 53, "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 4, "edge": "mailgun", "key": "schema", "mailgun": 83, "mandrill": 79, "name": "Schema \u0026 documentation", "weight": 13 }, { "by": 0, "edge": "", "key": "ergonomics", "mailgun": 60, "mandrill": 60, "name": "Agent ergonomics", "weight": 13 }, { "by": 6, "edge": "mailgun", "key": "security", "mailgun": 74, "mandrill": 68, "name": "Security \u0026 auth", "weight": 14 }, { "by": 5, "edge": "mailgun", "key": "payments", "mailgun": 40, "mandrill": 35, "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 59, "edge": "mailgun", "key": "maintenance", "mailgun": 87, "mandrill": 28, "name": "Maintenance \u0026 community", "weight": 7 }, { "by": 2, "edge": "mandrill", "key": "transparency", "mailgun": 69, "mandrill": 71, "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Mailgun API + MCP scores 66.2 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 5 of 7 scored categories. Both do email send.", "verdicts": { "mailgun": "Key roles (Admin, read-only Analyst, Developer, Support), Domain Sending Keys and IP allowlisting. 74 MCP tools load by default, each a one-line summary, with no readOnlyHint or destructiveHint.", "mandrill": "A public OpenAPI 3.1 file covers all 99 operations, the docs serve Markdown and llms.txt, and keys can be limited by endpoint and IP address. Sending needs a Standard or Premium Mailchimp plan plus $20 blocks of 25,000 emails. No send idempotency key or SLA was found, and the newest dated release is from 24 March 2026." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/mailgun-vs-mandrill", "json": "https://www.anchorterminal.com/compare/mailgun-vs-mandrill.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/mailgun-vs-mandrill.md", "slim": "https://www.anchorterminal.com/compare/mailgun-vs-mandrill.min.md" }, "markdown": "Mailgun API + MCP scores 66.2 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 5 of 7 scored categories. Both do email send.\n\n- Mailgun API + MCP: grade B, 66.2/100, rank #242 of 722. Markdown https://www.anchorterminal.com/tools/mailgun.md · JSON https://www.anchorterminal.com/api/v1/tools/mailgun.json\n- Mailchimp Transactional (Mandrill): grade C, 58.1/100, rank #459 of 722. Markdown https://www.anchorterminal.com/tools/mandrill.md · JSON https://www.anchorterminal.com/api/v1/tools/mandrill.json\n\n## Which one, for what\n\n### Mailgun API + MCP (B)\n\nGood for: Teams that want inbound routing, validation and per-key roles in one account, in US or EU regions.\n\nAhead on:\n- Security \u0026 auth, 74 against 68\n- Payments \u0026 pricing, 40 against 35\n- Maintenance \u0026 community, 87 against 28\n\nAlso in its favour:\n- Runs on your own machine\n\nWatch for: 74 MCP tools load by default, each a one-line summary, with no readOnlyHint or destructiveHint\n\n### Mailchimp Transactional (Mandrill) (C)\n\nGood for: Teams already paying for Mailchimp Standard or Premium that want transactional mail, inbound parsing and an MCP server on the same account.\n\nWatch for: Full use needs a Standard or Premium Mailchimp marketing plan in addition to the email blocks\n\n\n## Score by category\n\n| Category | Weight | Mailgun API + MCP | Mailchimp Transactional (Mandrill) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 57 | 53 | Mailgun API + MCP +4 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 83 | 79 | Mailgun API + MCP +4 |\n| Agent ergonomics | 13% (16.2 this run) | 60 | 60 | even |\n| Security \u0026 auth | 14% (17.5 this run) | 74 | 68 | Mailgun API + MCP +6 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 35 | Mailgun API + MCP +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 87 | 28 | Mailgun API + MCP +59 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 69 | 71 | Mailchimp Transactional (Mandrill) +2 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **66.2 · B** | **58.1 · C** | |\n\n## Facts side by side\n\n| Fact | Mailgun API + MCP | Mailchimp Transactional (Mandrill) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Mailgun (Sinch) | Intuit Mailchimp |\n| Hosted endpoint | `https://api.mailgun.net/v3` | `https://mandrillapp.com/api/1.4` |\n| Transports | HTTP, stdio | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | Apache-2.0 | Proprietary service under Mailchimp's Standard Terms of Use and Additional Terms. The client libraries are under Mailchimp's own client library licence agreement |\n| Tools exposed | 74 | 9 |\n| Read-only variant documented | yes | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-21 | 2026-03-24 |\n| Terms last updated | no date given | no date given |\n| Privacy policy last updated | no date given | 2026-03-09 |\n| Customer content may train models | not found in the text | yes |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | yes | yes |\n| Popularity | 62 stars, 1.3M npm/wk, 61k PyPI/wk | 226k npm/wk, 132k PyPI/wk |\n| Agent reviews | 3/5 (2) | none |\n\n## Verdicts\n\n**Mailgun API + MCP.** Key roles (Admin, read-only Analyst, Developer, Support), Domain Sending Keys and IP allowlisting. 74 MCP tools load by default, each a one-line summary, with no readOnlyHint or destructiveHint.\n\n**Mailchimp Transactional (Mandrill).** A public OpenAPI 3.1 file covers all 99 operations, the docs serve Markdown and llms.txt, and keys can be limited by endpoint and IP address. Sending needs a Standard or Premium Mailchimp plan plus $20 blocks of 25,000 emails. No send idempotency key or SLA was found, and the newest dated release is from 24 March 2026.\n\n## Before you call either\n\n### Mailgun API + MCP\n\n1. Give an agent that only sends a Domain Sending Key, which can only POST /messages for one domain\n2. Start the MCP with `--tags validate,inspect` when you don't need the 70 send-tagged tools\n3. Set `MAILGUN_API_REGION=eu` for EU accounts, which live on api.eu.mailgun.net\n4. Add `o:testmode=yes` to check a send without delivering it\n5. Verify a custom domain first. The sandbox domain reaches only 5 authorised recipients\n\n### Mailchimp Transactional (Mandrill)\n\n1. Send every call as POST with the key in the JSON body as `key`. The MCP server takes the same key as `Authorization: Bearer`\n2. Use a test API key while building. Test sends are free, capped at 10,000 a day, and deliver nothing\n3. Verify the sending domain with DKIM and DMARC first. Mail from an unverified domain is rejected with the reason `unsigned`\n4. Keep `/messages/search` under 20 calls a minute and set `limit` (default 100, maximum 1,000). There is no offset, so use an activity export for more\n5. For a restricted key that must also use the MCP server, enable the AI Agents permission group on the key\n\n## Questions\n\n### Which is better for AI agents, Mailgun API + MCP or Mailchimp Transactional (Mandrill)?\n\nMailgun API + MCP scores 66.2 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 5 of 7 scored categories.\n\n### Do Mailgun API + MCP and Mailchimp Transactional (Mandrill) need an API key?\n\nBoth need an API key.\n\n### Can an agent call Mailgun API + MCP and Mailchimp Transactional (Mandrill) without installing anything?\n\nYes. Mailgun API + MCP has a hosted endpoint at https://api.mailgun.net/v3 and Mailchimp Transactional (Mandrill) at https://mandrillapp.com/api/1.4.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/mailgun-vs-mandrill.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mailgun-vs-mandrill.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mailgun\", \"b\": \"mandrill\"}`. From a terminal: `anchor compare mailgun mandrill`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mailgun.json and https://www.anchorterminal.com/api/v1/tools/mandrill.json\n\n## Other comparisons with Mailgun API + MCP or Mailchimp Transactional (Mandrill)\n\n- [Amazon SES vs Mailgun API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-mailgun.md)\n- [Amazon SES vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/amazon-ses-vs-mandrill.md)\n- [Brevo API + MCP vs Mailgun API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailgun.md)\n- [Brevo API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/brevo-vs-mandrill.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 Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill.md)\n- [Loops API + MCP vs Mailgun API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailgun.md)\n- [Loops API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/loops-vs-mandrill.md)\n- [MailerSend vs Mailgun API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailgun.md)\n- [MailerSend vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailersend-vs-mandrill.md)\n- [Mailgun API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-mailjet.md)\n- [Mailgun API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-mailtrap.md)\n- [Mailgun API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-postmark.md)\n- [Mailgun API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-resend.md)\n- [Mailgun API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailgun-vs-sendgrid.md)\n- [Mailgun API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-smtp2go.md)\n- [Mailgun API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailgun-vs-zoho-zeptomail.md)\n- [Mailjet API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailjet-vs-mandrill.md)\n- [Mailtrap Email API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailtrap-vs-mandrill.md)\n- [Mailchimp Transactional (Mandrill) vs Postmark API + MCP](https://www.anchorterminal.com/compare/mandrill-vs-postmark.md)\n- [Mailchimp Transactional (Mandrill) vs Resend API + MCP](https://www.anchorterminal.com/compare/mandrill-vs-resend.md)\n- [Mailchimp Transactional (Mandrill) vs Twilio SendGrid](https://www.anchorterminal.com/compare/mandrill-vs-sendgrid.md)\n- [Mailchimp Transactional (Mandrill) vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mandrill-vs-smtp2go.md)\n- [Mailchimp Transactional (Mandrill) vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mandrill-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": "Mailgun API + MCP vs Mailchimp Transactional (Mandrill)", "url": "" } ], "description": "Mailgun API + MCP scores 66.2 (B) on agent readiness against Mailchimp Transactional (Mandrill)'s 58.1 (C), and leads in 5 of 7 scored categories. Both do email send. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Mailgun API + MCP B 66.2", "Mailchimp Transactional (Mandrill) C 58.1", "scores" ], "h1": "Mailgun API + MCP vs Mailchimp Transactional (Mandrill)", "image": "https://www.anchorterminal.com/assets/og/compare-mailgun-vs-mandrill.png", "path": "/compare/mailgun-vs-mandrill", "published": "2026-10-01", "section": "tools", "title": "Mailgun API + MCP vs Mailchimp Transactional (Mandrill) for AI agents", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/mailgun-vs-mandrill" }, "tokens": { "markdown": 2500, "slim": 680 }, "version": 1 }