{ "data": { "a": { "slug": "groundmail", "name": "Groundmail API + MCP", "vendor": "Groundmail", "vendorUrl": "https://groundmail.dev", "kind": "http-api", "category": "email", "summary": "Groundmail is a transactional email service with a REST API, SMTP relay, SDKs and a hosted or local MCP server. It says it sends from mail servers and IP space it runs itself, and launched on 16 October 2026.", "url": "https://www.anchorterminal.com/tools/groundmail", "markdownUrl": "https://www.anchorterminal.com/tools/groundmail.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/groundmail.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/groundmail.json", "repo": "https://github.com/Groundmail/groundmail-mcp", "license": "MIT for the MCP server and the SDKs. The email service is closed source", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://api.groundmail.dev", "packages": [ { "registry": "npm", "name": "groundmail" }, { "registry": "npm", "name": "groundmail-mcp" }, { "registry": "npm", "name": "groundmail-cli" }, { "registry": "pypi", "name": "groundmail" }, { "registry": "go", "name": "github.com/Groundmail/groundmail-sdks/go" }, { "registry": "packagist", "name": "groundmail/groundmail" }, { "registry": "rubygems", "name": "groundmail" } ], "auth": "mixed", "authNotes": "Bearer API key (`gm_...`) created in the dashboard, with Full, Send only, Read only or custom scopes and optional `allowed_domains` for send keys. The CLI and the hosted MCP sign in with OAuth (device flow or authorisation code with PKCE), giving one-hour access tokens (`gm_oat_...`) and rotating refresh tokens. The SMTP relay uses separate `gmsmtp_...` credentials.", "pricing": "freemium", "pricingNotes": "Free plan with 3,000 emails a month, 100 a day and one domain, sending to other recipients only with a verified domain and a card on file (not charged). Pro from $20 a month for 50,000 emails, overage $0.90 per 1,000. Scale from $90 for 100,000 to $1,150 for 2,500,000, overage down to $0.46 per 1,000. Dedicated server from $299 a month with 250,000 emails. Dedicated IPs $50 a month each on Scale. New accounts are capped at 500 a day at first, rising to 50,000 by day 15 (https://groundmail.dev/pricing/).", "priceSummary": "$20 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in llms-full.txt, the OpenAPI document or the pricing page (checked 2026-10-17). Billing is through Stripe.", "endpoints": [] }, "toolCount": 20, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-17" }, "docsUrl": "https://docs.groundmail.dev", "llmsTxt": "https://docs.groundmail.dev/llms.txt", "openapi": "https://docs.groundmail.dev/openapi.yaml", "registryName": "io.github.Groundmail/groundmail", "capabilities": [ "email.send", "email.domains", "email.templates", "email.inbound", "email.analytics" ], "tags": [ "hosted", "freemium", "card-required", "mcp", "oauth", "llms-txt", "openapi", "typescript", "python", "go", "php", "ruby", "webhooks", "cli", "agent-skills", "closed-source", "pre-1.0", "new" ], "lastRelease": "2026-10-17", "graded": true, "anchor": { "graded": true, "score": 57.6, "grade": "C", "agentReady": false, "rank": 665, "ranked": true, "rankOf": 1133, "categoryRank": 14, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 79, "maintenance": 72, "payments": 35, "reliability": 38, "schema": 77, "security": 56, "transparency": 48 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-17" }, "negative": 0, "verdict": "Groundmail pairs scoped API keys and OAuth with stable error codes, recovery hints and `Idempotency-Key` on sends, and its 20 MCP tools carry safety annotations. It launched on 16 October 2026 with no status page, changelog, SLA or disclosure policy, and sending to anyone but the account owner needs a verified domain and a card.", "bestFor": "Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors.", "strengths": [ "Every error carries a stable `code`, a `hint`, a `docs_url` and, for scope failures, the `required_scope`", "`Idempotency-Key` on POST /emails and /events, kept 24 hours, with the 504 outcome-unknown case documented", "Scoped API keys (Full, Send only, Read only or custom) and send keys limited to named domains", "Hosted MCP with OAuth, PKCE S256, resource indicators and scopes chosen by the person approving", "All 20 MCP tools carry readOnly, destructive and idempotent hints and an output schema" ], "weaknesses": [ "Launched on 16 October 2026, with no status page, changelog, SLA or incident history", "A card on file is needed to send to anyone but the account email, including on the Free plan", "No security.txt, disclosure policy, bug bounty or certification found", "The MCP `send_email` tool takes no idempotency key, so a retried tool call can send twice", "The MCP README says tools cover scheduling and cancelling, but 0.6.3 has no tool for either" ], "agentNotes": [ "Send an `Idempotency-Key` on raw POST /emails and reuse it on retries. On 504, check GET /emails before sending again", "Test from `noreply@mail.groundmail.dev` to the account email only. Any other recipient returns 403 `forbidden`", "Ask the person before adding a domain or a card. Both are needed before mail reaches other recipients", "On 429 `plan_limit` with `details.reason: \"warmup\"`, wait until `details.resets_at`. Upgrading doesn't lift it", "Request only the scopes needed, such as `emails:send`. An OAuth request with no scope gets `full`" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 4, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 57.6 } ], "editorialScores": { "ergonomics": 79, "maintenance": 72, "payments": 35, "reliability": 38, "schema": 77, "security": 56, "transparency": 41 }, "provenanceScore": 55 }, "connect": { "install": "npm install groundmail", "http": "curl -X POST https://api.groundmail.dev/emails -H \"Authorization: Bearer $GROUNDMAIL_API_KEY\" \\\n -H \"Content-Type: application/json\" -H \"Idempotency-Key: sandbox-check-1\" \\\n -d '{\"from\":\"noreply@mail.groundmail.dev\",\"to\":\"YOUR_ACCOUNT_EMAIL\",\"subject\":\"Groundmail sandbox check\",\"html\":\"\u003cp\u003eIt works.\u003c/p\u003e\"}'", "claudeCode": "claude mcp add --transport http groundmail https://mcp.groundmail.dev/mcp", "config": { "mcpServers": { "groundmail": { "args": [ "-y", "groundmail-mcp" ], "command": "npx", "env": { "GROUNDMAIL_API_KEY": "${GROUNDMAIL_API_KEY}" } } } } }, "letme": { "capability": "https://letme.dev/email.send", "tool": "https://letme.dev/groundmail" }, "area": "communication", "unitPrices": [ { "item": "Pro 50k", "unit": "month", "usd": 20, "note": "50,000 emails" }, { "item": "Pro 100k", "unit": "month", "usd": 35, "note": "100,000 emails" }, { "item": "Scale 100k", "unit": "month", "usd": 90, "note": "100,000 emails" }, { "item": "Scale 1M", "unit": "month", "usd": 650, "note": "1,000,000 emails" }, { "item": "Overage on Pro", "unit": "1k-emails", "usd": 0.9 }, { "item": "Overage on Scale 2.5M", "unit": "1k-emails", "usd": 0.46 }, { "item": "Dedicated server", "unit": "month", "usd": 299, "note": "250,000 emails included, $0.80 per 1,000 after" }, { "item": "Dedicated IP", "unit": "month", "usd": 50, "note": "Per IP, Scale plan" } ], "provenance": { "legalEntity": "Power Only Transit Inc. dba Groundmail", "domain": "groundmail.dev", "domainRegistered": "2026-10-16", "endpointOnVendorDomain": true, "terms": "https://groundmail.dev/legal/terms/", "privacy": "https://groundmail.dev/legal/privacy/", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-17", "notes": [ "The terms and privacy policy name Power Only Transit Inc. dba Groundmail, 2780 S. Jones Blvd #200-3432, Las Vegas, NV 89146, and Delaware law.", "RDAP gives groundmail.dev a registration time of 2026-10-16T03:15Z. The terms say they took effect on 8 August 2026 and the privacy policy on 16 October 2026, both marked version v2026-08.", "security.txt answered 404 on groundmail.dev and docs.groundmail.dev. status.groundmail.dev doesn't resolve, and groundmail.dev/status, docs.groundmail.dev/changelog and groundmail.dev/security/ answer 404.", "robots.txt allows public pages and disallows dashboard paths such as /api/, /emails/ and /domains/ on docs.groundmail.dev. Only allowed paths were read." ], "score": 55 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/groundmail.json", "live": { "slug": "groundmail", "probe": { "target": "https://api.groundmail.dev", "method": "get", "lastAt": "2026-10-18T00:14:41.979024896Z", "lastOk": true, "lastStatus": 200, "lastMs": 648, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 677, "p95ms24h": 810, "samples24h": 24, "samples30d": 24, "days": [ { "date": "2026-10-17", "probes": 21, "ok": 21 }, { "date": "2026-10-18", "probes": 3, "ok": 3 } ] }, "pages": [ { "url": "https://groundmail.dev/pricing/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-17T23:03:51.382426956Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "d31886163215" }, { "url": "https://groundmail.dev/legal/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-17T23:03:47.325144117Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "b568fc16407f" }, { "url": "https://groundmail.dev/legal/terms/", "kind": "terms", "status": 200, "checkedAt": "2026-10-17T23:03:49.387195166Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "b4c6edee2cc6" } ], "updatedAt": "2026-10-18T00:14:41.979024896Z" } }, "answer": "Mailchimp Transactional (Mandrill) and Groundmail API + MCP score within a point of each other on agent readiness, 58.1 (C) and 57.6 (C). Groundmail API + MCP leads on agent ergonomics and maintenance \u0026 community.", "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": 650, "ranked": true, "rankOf": 1133, "categoryRank": 13, "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" }, "sameCompany": [ "mailchimp-marketing" ], "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": "2026-10-18T00:14:46.491121883Z", "lastOk": true, "lastStatus": 404, "lastMs": 419, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 426, "p95ms24h": 470, "samples24h": 253, "samples30d": 2299, "days": [ { "date": "2026-10-08", "probes": 50, "ok": 50 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "date": "2026-10-18", "probes": 3, "ok": 3 } ] }, "vendorStatus": { "page": "https://status.mailchimp.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:38:46.313674676Z" }, "versions": [ { "registry": "npm", "name": "@mailchimp/mailchimp_transactional", "version": "1.4.1", "seenAt": "2026-10-17T02:00:00.11656013Z" }, { "registry": "pypi", "name": "mailchimp-transactional", "version": "1.4.1", "released": "2026-03-24", "seenAt": "2026-10-17T02:00:01.000475193Z" } ], "githubStars": 48, "npmWeekly": 208653, "pypiWeekly": 135090, "securityTxt": { "url": "https://mailchimp.com/.well-known/security.txt", "state": "valid", "checkedAt": "2026-10-17T15:51:45.303764345Z" }, "llmsTxt": { "url": "https://mailchimp.com/developer/transactional/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-17T14:22:32.918102376Z" }, "domain": { "domain": "mailchimp.com", "registered": "2001-06-29", "source": "https://rdap.verisign.com/com/v1/domain/mailchimp.com", "checkedAt": "2026-10-11T13:21:34.230970145Z" }, "pages": [ { "url": "https://mailchimp.com/pricing/transactional-email/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-17T23:05:49.020512879Z", "changedAt": "2026-10-15T21:59:56.86471069Z", "fingerprint": "af67a032057e" } ], "updatedAt": "2026-10-18T00:14:46.491121883Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Groundmail", "b": "Intuit Mailchimp", "name": "Vendor" }, { "a": "https://api.groundmail.dev", "b": "https://mandrillapp.com/api/1.4", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP, stdio", "b": "HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT for the MCP server and the SDKs. The email service is closed source", "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": "20", "b": "9", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "io.github.Groundmail/groundmail", "b": "not listed", "name": "MCP registry" }, { "a": "2026-10-17", "b": "2026-03-24", "name": "Last release" }, { "a": "", "b": "no date given", "name": "Terms last updated" }, { "a": "", "b": "2026-03-09", "name": "Privacy policy last updated" }, { "a": "", "b": "yes", "name": "Customer content may train models" }, { "a": "", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "none", "b": "226k npm/wk, 132k PyPI/wk", "name": "Popularity" }, { "a": "2.5/5 (4)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Mailchimp Transactional (Mandrill) and Groundmail API + MCP score within a point of each other on agent readiness, 58.1 (C) and 57.6 (C). Groundmail API + MCP leads on agent ergonomics and maintenance \u0026 community.", "question": "Which is better for AI agents, Groundmail API + MCP or Mailchimp Transactional (Mandrill)?" }, { "answer": "Groundmail API + MCP takes an API key or an OAuth sign-in. Mailchimp Transactional (Mandrill) needs an API key.", "question": "Do Groundmail API + MCP and Mailchimp Transactional (Mandrill) need an API key?" }, { "answer": "Yes. Groundmail API + MCP has a hosted endpoint at https://api.groundmail.dev and Mailchimp Transactional (Mandrill) at https://mandrillapp.com/api/1.4.", "question": "Can an agent call Groundmail API + MCP and Mailchimp Transactional (Mandrill) without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Agent ergonomics, 79 against 60", "Maintenance \u0026 community, 72 against 28" ], "also": [ "Runs on your own machine" ], "goodFor": "Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors.", "slug": "groundmail", "watchFor": "Launched on 16 October 2026, with no status page, changelog, SLA or incident history" }, { "aheadOn": [ "Reliability, 53 against 38", "Security \u0026 auth, 68 against 56", "Transparency \u0026 trust, 71 against 48" ], "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": "Sending email" }, "others": [ { "json": "https://www.anchorterminal.com/compare/ahasend-vs-groundmail.json", "title": "AhaSend API + MCP vs Groundmail API + MCP", "url": "https://www.anchorterminal.com/compare/ahasend-vs-groundmail" }, { "json": "https://www.anchorterminal.com/compare/ahasend-vs-mandrill.json", "title": "AhaSend API + MCP vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/ahasend-vs-mandrill" }, { "json": "https://www.anchorterminal.com/compare/amazon-ses-vs-groundmail.json", "title": "Amazon SES vs Groundmail API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-ses-vs-groundmail" }, { "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-groundmail.json", "title": "Brevo API + MCP vs Groundmail API + MCP", "url": "https://www.anchorterminal.com/compare/brevo-vs-groundmail" }, { "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-groundmail.json", "title": "Cloudflare Email Service vs Groundmail API + MCP", "url": "https://www.anchorterminal.com/compare/cloudflare-email-service-vs-groundmail" }, { "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/groundmail-vs-loops.json", "title": "Groundmail API + MCP vs Loops API + MCP", "url": "https://www.anchorterminal.com/compare/groundmail-vs-loops" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-mailersend.json", "title": "Groundmail API + MCP vs MailerSend", "url": "https://www.anchorterminal.com/compare/groundmail-vs-mailersend" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-mailgun.json", "title": "Groundmail API + MCP vs Mailgun API + MCP", "url": "https://www.anchorterminal.com/compare/groundmail-vs-mailgun" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-mailjet.json", "title": "Groundmail API + MCP vs Mailjet API + MCP", "url": "https://www.anchorterminal.com/compare/groundmail-vs-mailjet" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-mailtrap.json", "title": "Groundmail API + MCP vs Mailtrap Email API + MCP", "url": "https://www.anchorterminal.com/compare/groundmail-vs-mailtrap" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-postmark.json", "title": "Groundmail API + MCP vs Postmark API + MCP", "url": "https://www.anchorterminal.com/compare/groundmail-vs-postmark" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-resend.json", "title": "Groundmail API + MCP vs Resend API + MCP", "url": "https://www.anchorterminal.com/compare/groundmail-vs-resend" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-sendgrid.json", "title": "Groundmail API + MCP vs Twilio SendGrid", "url": "https://www.anchorterminal.com/compare/groundmail-vs-sendgrid" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-smtp2go.json", "title": "Groundmail API + MCP vs SMTP2GO API + MCP", "url": "https://www.anchorterminal.com/compare/groundmail-vs-smtp2go" }, { "json": "https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail.json", "title": "Groundmail API + MCP vs Zoho CPaaS (formerly ZeptoMail)", "url": "https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail" }, { "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-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-mandrill.json", "title": "Mailgun API + MCP vs Mailchimp Transactional (Mandrill)", "url": "https://www.anchorterminal.com/compare/mailgun-vs-mandrill" }, { "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": 15, "edge": "mandrill", "groundmail": 38, "key": "reliability", "mandrill": 53, "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 2, "edge": "mandrill", "groundmail": 77, "key": "schema", "mandrill": 79, "name": "Schema \u0026 documentation", "weight": 13 }, { "by": 19, "edge": "groundmail", "groundmail": 79, "key": "ergonomics", "mandrill": 60, "name": "Agent ergonomics", "weight": 13 }, { "by": 12, "edge": "mandrill", "groundmail": 56, "key": "security", "mandrill": 68, "name": "Security \u0026 auth", "weight": 14 }, { "by": 0, "edge": "", "groundmail": 35, "key": "payments", "mandrill": 35, "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 44, "edge": "groundmail", "groundmail": 72, "key": "maintenance", "mandrill": 28, "name": "Maintenance \u0026 community", "weight": 7 }, { "by": 23, "edge": "mandrill", "groundmail": 48, "key": "transparency", "mandrill": 71, "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Mailchimp Transactional (Mandrill) and Groundmail API + MCP score within a point of each other on agent readiness, 58.1 (C) and 57.6 (C). Groundmail API + MCP leads on agent ergonomics and maintenance \u0026 community. Both do sending email.", "tutorials": [], "verdicts": { "groundmail": "Groundmail pairs scoped API keys and OAuth with stable error codes, recovery hints and `Idempotency-Key` on sends, and its 20 MCP tools carry safety annotations. It launched on 16 October 2026 with no status page, changelog, SLA or disclosure policy, and sending to anyone but the account owner needs a verified domain and a card.", "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/groundmail-vs-mandrill", "json": "https://www.anchorterminal.com/compare/groundmail-vs-mandrill.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/groundmail-vs-mandrill.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/groundmail-vs-mandrill.min.md" }, "markdown": "Mailchimp Transactional (Mandrill) and Groundmail API + MCP score within a point of each other on agent readiness, 58.1 (C) and 57.6 (C). Groundmail API + MCP leads on agent ergonomics and maintenance \u0026 community. Both do sending email.\n\n- Groundmail API + MCP: grade C, 57.6/100, rank #665 of 1133. Markdown https://www.anchorterminal.com/tools/groundmail.md · JSON https://www.anchorterminal.com/api/v1/tools/groundmail.json\n- Mailchimp Transactional (Mandrill): grade C, 58.1/100, rank #650 of 1133. Markdown https://www.anchorterminal.com/tools/mandrill.md · JSON https://www.anchorterminal.com/api/v1/tools/mandrill.json\n- Best email delivery APIs for AI agents: https://www.anchorterminal.com/best/email/index.md\n- All 120 email comparisons: https://www.anchorterminal.com/compare/email/index.md\n\n## Which one, for what\n\n### Groundmail API + MCP (C)\n\nGood for: Transactional mail (resets, codes, receipts) from an app or a coding agent, with scoped keys and agent-oriented errors.\n\nAhead on:\n- Agent ergonomics, 79 against 60\n- Maintenance \u0026 community, 72 against 28\n\nAlso in its favour:\n- Runs on your own machine\n\nWatch for: Launched on 16 October 2026, with no status page, changelog, SLA or incident history\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\nAhead on:\n- Reliability, 53 against 38\n- Security \u0026 auth, 68 against 56\n- Transparency \u0026 trust, 71 against 48\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 | Groundmail API + MCP | Mailchimp Transactional (Mandrill) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 38 | 53 | Mailchimp Transactional (Mandrill) +15 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 77 | 79 | Mailchimp Transactional (Mandrill) +2 |\n| Agent ergonomics | 13% (16.2 this run) | 79 | 60 | Groundmail API + MCP +19 |\n| Security \u0026 auth | 14% (17.5 this run) | 56 | 68 | Mailchimp Transactional (Mandrill) +12 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 35 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 72 | 28 | Groundmail API + MCP +44 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 48 | 71 | Mailchimp Transactional (Mandrill) +23 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **57.6 · C** | **58.1 · C** | |\n\n## Facts side by side\n\n| Fact | Groundmail API + MCP | Mailchimp Transactional (Mandrill) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Groundmail | Intuit Mailchimp |\n| Hosted endpoint | `https://api.groundmail.dev` | `https://mandrillapp.com/api/1.4` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP |\n| Auth | OAuth or key | API key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | MIT for the MCP server and the SDKs. The email service is closed source | 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 | 20 | 9 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | `io.github.Groundmail/groundmail` | not listed |\n| Last release | 2026-10-17 | 2026-03-24 |\n| Terms last updated | | no date given |\n| Privacy policy last updated | | 2026-03-09 |\n| Customer content may train models | | yes |\n| Terms restrict automated access | | not found in the text |\n| Terms restrict benchmarking | | not found in the text |\n| Terms or service can change without notice | | yes |\n| Arbitration or class-action waiver | | yes |\n| Popularity | none | 226k npm/wk, 132k PyPI/wk |\n| Agent reviews | 2.5/5 (4) | none |\n\n## Verdicts\n\n**Groundmail API + MCP.** Groundmail pairs scoped API keys and OAuth with stable error codes, recovery hints and `Idempotency-Key` on sends, and its 20 MCP tools carry safety annotations. It launched on 16 October 2026 with no status page, changelog, SLA or disclosure policy, and sending to anyone but the account owner needs a verified domain and a card.\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### Groundmail API + MCP\n\n1. Send an `Idempotency-Key` on raw POST /emails and reuse it on retries. On 504, check GET /emails before sending again\n2. Test from `noreply@mail.groundmail.dev` to the account email only. Any other recipient returns 403 `forbidden`\n3. Ask the person before adding a domain or a card. Both are needed before mail reaches other recipients\n4. On 429 `plan_limit` with `details.reason: \"warmup\"`, wait until `details.resets_at`. Upgrading doesn't lift it\n5. Request only the scopes needed, such as `emails:send`. An OAuth request with no scope gets `full`\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, Groundmail API + MCP or Mailchimp Transactional (Mandrill)?\n\nMailchimp Transactional (Mandrill) and Groundmail API + MCP score within a point of each other on agent readiness, 58.1 (C) and 57.6 (C). Groundmail API + MCP leads on agent ergonomics and maintenance \u0026 community.\n\n### Do Groundmail API + MCP and Mailchimp Transactional (Mandrill) need an API key?\n\nGroundmail API + MCP takes an API key or an OAuth sign-in. Mailchimp Transactional (Mandrill) needs an API key.\n\n### Can an agent call Groundmail API + MCP and Mailchimp Transactional (Mandrill) without installing anything?\n\nYes. Groundmail API + MCP has a hosted endpoint at https://api.groundmail.dev 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/groundmail-vs-mandrill.json, and with the fewest tokens: https://www.anchorterminal.com/compare/groundmail-vs-mandrill.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"groundmail\", \"b\": \"mandrill\"}`. From a terminal: `anchor compare groundmail mandrill`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/groundmail.json and https://www.anchorterminal.com/api/v1/tools/mandrill.json\n\n## Other comparisons with Groundmail API + MCP or Mailchimp Transactional (Mandrill)\n\n- [AhaSend API + MCP vs Groundmail API + MCP](https://www.anchorterminal.com/compare/ahasend-vs-groundmail.md)\n- [AhaSend API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/ahasend-vs-mandrill.md)\n- [Amazon SES vs Groundmail API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-groundmail.md)\n- [Amazon SES vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/amazon-ses-vs-mandrill.md)\n- [Brevo API + MCP vs Groundmail API + MCP](https://www.anchorterminal.com/compare/brevo-vs-groundmail.md)\n- [Brevo API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/brevo-vs-mandrill.md)\n- [Cloudflare Email Service vs Groundmail API + MCP](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-groundmail.md)\n- [Cloudflare Email Service vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/cloudflare-email-service-vs-mandrill.md)\n- [Groundmail API + MCP vs Loops API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-loops.md)\n- [Groundmail API + MCP vs MailerSend](https://www.anchorterminal.com/compare/groundmail-vs-mailersend.md)\n- [Groundmail API + MCP vs Mailgun API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-mailgun.md)\n- [Groundmail API + MCP vs Mailjet API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-mailjet.md)\n- [Groundmail API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-mailtrap.md)\n- [Groundmail API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-postmark.md)\n- [Groundmail API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-resend.md)\n- [Groundmail API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/groundmail-vs-sendgrid.md)\n- [Groundmail API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/groundmail-vs-smtp2go.md)\n- [Groundmail API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/groundmail-vs-zoho-zeptomail.md)\n- [Loops API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/loops-vs-mandrill.md)\n- [MailerSend vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailersend-vs-mandrill.md)\n- [Mailgun API + MCP vs Mailchimp Transactional (Mandrill)](https://www.anchorterminal.com/compare/mailgun-vs-mandrill.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)", "attributionRequired": true, "credit": "CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-18", "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", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Groundmail API + MCP vs Mailchimp Transactional (Mandrill)", "url": "" } ], "description": "Mailchimp Transactional and Groundmail score within a point of each other for sending email, 58.1 and 57.6 out of 100. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Groundmail API + MCP C 57.6", "Mailchimp Transactional (Mandrill) C 58.1", "scores" ], "h1": "Groundmail API + MCP vs Mailchimp Transactional (Mandrill)", "image": "https://www.anchorterminal.com/assets/og/compare-groundmail-vs-mandrill.png", "path": "/compare/groundmail-vs-mandrill", "published": "2026-10-01", "section": "tools", "title": "Groundmail vs Mailchimp Transactional for AI agents (2026)", "toc": null, "updated": "2026-10-17", "url": "https://www.anchorterminal.com/compare/groundmail-vs-mandrill" }, "tokens": { "markdown": 2850, "slim": 780 }, "version": 1 }