{ "data": { "a": { "slug": "agentmail", "name": "AgentMail API + MCP", "vendor": "AgentMail", "vendorUrl": "https://www.agentmail.to", "kind": "http-api", "category": "agent-inboxes", "summary": "Email inboxes for agents over REST.", "url": "https://www.anchorterminal.com/tools/agentmail", "markdownUrl": "https://www.anchorterminal.com/tools/agentmail.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/agentmail.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/agentmail.json", "repo": "https://github.com/agentmail-to/agentmail-mcp", "license": "MIT", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://api.agentmail.to/v0", "packages": [ { "registry": "npm", "name": "agentmail" }, { "registry": "pypi", "name": "agentmail" }, { "registry": "npm", "name": "agentmail-mcp" } ], "auth": "mixed", "authNotes": "Bearer API key (`am_...`) for REST, with per-key permissions scoped to pods or inboxes. The hosted MCP uses OAuth through console.agentmail.to, or an `x-api-key` header for clients without OAuth. An agent can sign itself up by API and gets a key back, with full access after a human confirms a 6-digit OTP. x402 base URLs take USDC payment instead of a key.", "pricing": "freemium", "pricingNotes": "Free plan with 3 inboxes, 3,000 emails a month (100 a day) and 3 GB storage, no card. Developer $20 a month for 10 inboxes, 10,000 emails and 10 custom domains. Startup $200 a month for 150 inboxes, 150,000 emails a month (15,000 a day) and 150 domains. Add-ons are $2 a month per extra inbox or domain and $2 a month per extra 1,000 emails. Yearly billing is 20 per cent off. Over x402, creating an inbox costs $2 in USDC (https://www.agentmail.to/pricing).", "priceSummary": "$2 / call", "where": "both", "x402": { "level": "yes", "evidence": "Official docs describe x402 base URLs x402.api.agentmail.to and x402.ws.agentmail.to, paid in USDC on Base, Polygon or Solana, with inbox creation priced at $2.00. An unauthenticated POST to x402.api.agentmail.to/v0/inboxes returned HTTP 402 with a v2 payment-required header asking for 2,000,000 USDC base units ($2) on Base, Polygon, Solana, Avalanche and X Layer. The challenge names api.paysponge.com as the resource URL, so a third-party payment layer appears to sit in front of the API (https://docs.agentmail.to/integrations/x402).", "endpoints": [ { "url": "https://x402.api.agentmail.to/v0/inboxes", "priceUsd": 2, "network": "eip155:8453" } ] }, "toolCount": 36, "popularity": { "githubStars": 66, "npmWeekly": 240222, "pypiWeekly": 331643, "asOf": "2026-09-30" }, "docsUrl": "https://docs.agentmail.to", "llmsTxt": "https://docs.agentmail.to/llms.txt", "openapi": "https://docs.agentmail.to/openapi.json", "registryName": "to.agentmail/agentmail", "capabilities": [ "email.inbox", "email.send", "email.inbound", "email.threads", "email.domains", "email.analytics" ], "tags": [ "hosted", "freemium", "no-card", "mcp", "llms-txt", "openapi", "x402", "stablecoin", "typescript", "python", "webhooks" ], "lastRelease": "2026-09-30", "graded": true, "anchor": { "graded": true, "score": 74.9, "grade": "BB", "agentReady": true, "rank": 55, "ranked": true, "rankOf": 722, "categoryRank": 1, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 86, "maintenance": 85, "payments": 85, "reliability": 61, "schema": 85, "security": 62, "transparency": 68 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Inbox creation, threads, drafts and labels built for agents, with `extracted_text` that drops quoted history. Email sending was down for 8 hours 7 minutes on 19 August 2026.", "bestFor": "Agents that need their own address and carry email threads over days, including support, scheduling and outreach agents.", "strengths": [ "Inbox creation, threads, drafts and labels built for agents, with `extracted_text` that drops quoted history", "x402 on its own domain and an agent sign-up API, so an agent can start without a person in a dashboard", "Free plan with 3 inboxes and 3,000 emails a month, no card", "API keys scoped to pods or inboxes, and OAuth on the hosted MCP server", "Privacy policy with retention periods and a no-training statement for email content" ], "weaknesses": [ "Email sending was down for 8 hours 7 minutes on 19 August 2026", "API request limits aren't published as numbers", "The hosted MCP server's 38 tools load at once, with filtering only in the stdio bridges", "No read-only mode or confirmation before sends and deletes over MCP", "The MCP server accepts the API key as a query parameter" ], "agentNotes": [ "Subscribe over WebSocket instead of polling. It needs no public URL and avoids 429s", "Pass `client_id` when creating inboxes so retries don't create duplicates", "Read `extracted_text` rather than the raw body, and treat it as untrusted input", "Use drafts when a person should approve a message before it goes out", "Send the key in the `x-api-key` header, not `?apiKey=`, which ends up in logs" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 8, "avgRating": 3.1, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 74.9 } ], "editorialScores": { "ergonomics": 86, "maintenance": 85, "payments": 85, "reliability": 61, "schema": 85, "security": 62, "transparency": 64 }, "provenanceScore": 71 }, "connect": { "http": "curl -X POST https://api.agentmail.to/v0/inboxes \\\n -H \"Authorization: Bearer $AGENTMAIL_API_KEY\" \\\n -H \"Content-Type: application/json\" -d '{\"client_id\":\"my-agent-inbox-v1\"}'", "claudeCode": "claude mcp add --transport http agentmail https://mcp.agentmail.to/mcp", "config": { "mcpServers": { "agentmail": { "args": [ "-y", "agentmail-mcp" ], "command": "npx", "env": { "AGENTMAIL_API_KEY": "${AGENTMAIL_API_KEY}" } } } } }, "letme": { "capability": "https://letme.dev/email.inbox", "tool": "https://letme.dev/agentmail" }, "area": "communication", "unitPrices": [ { "item": "Developer plan", "unit": "month", "usd": 20, "note": "10 inboxes, 10,000 emails, 10 custom domains" }, { "item": "Startup plan", "unit": "month", "usd": 200, "note": "150 inboxes, 150,000 emails, 150 custom domains" }, { "item": "Extra inbox or domain", "unit": "month", "usd": 2, "note": "per inbox or domain" }, { "item": "Extra emails", "unit": "1k-emails", "usd": 2, "note": "$2 a month per extra 1,000 emails of monthly allowance" }, { "item": "Inbox creation over x402", "unit": "call", "usd": 2, "note": "USDC on Base, Polygon or Solana" } ], "provenance": { "legalEntity": "AgentMail, Inc.", "domain": "agentmail.to", "domainRegistered": "", "endpointOnVendorDomain": true, "terms": "https://www.agentmail.to/legal/terms", "privacy": "https://www.agentmail.to/legal/privacy", "statusPage": "https://status.agentmail.to", "changelog": "https://docs.agentmail.to/changelog", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "The .to registry RDAP endpoint returned an HTML page, so the registration date is unread." ], "score": 71 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/agentmail.json", "live": { "slug": "agentmail", "probe": { "target": "https://api.agentmail.to/v0", "method": "get", "lastAt": "2026-10-08T21:12:03.037013019Z", "lastOk": true, "lastStatus": 404, "lastMs": 126, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 124, "p95ms24h": 256, "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.agentmail.to", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:38:12.500687204Z" }, "versions": [ { "registry": "github", "name": "agentmail-to/agentmail-mcp", "version": "legacy-local-v0.2.2", "released": "2026-07-13", "seenAt": "2026-10-08T15:56:56.808684128Z" }, { "registry": "mcp-registry", "name": "to.agentmail/agentmail", "version": "1.0.0", "seenAt": "2026-10-08T02:42:52.272076636Z" }, { "registry": "npm", "name": "agentmail", "version": "0.5.42", "seenAt": "2026-10-08T15:56:49.436448691Z" }, { "registry": "npm", "name": "agentmail-mcp", "version": "1.1.0", "seenAt": "2026-10-08T15:56:56.624685205Z" }, { "registry": "pypi", "name": "agentmail", "version": "2.0.14", "released": "2026-10-07", "seenAt": "2026-10-08T15:56:52.704041576Z" } ], "githubStars": 66, "npmWeekly": 325424, "pypiWeekly": 482693, "securityTxt": { "url": "https://agentmail.to/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:55.527917035Z" }, "llmsTxt": { "url": "https://docs.agentmail.to/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:00.032605966Z" }, "domain": { "domain": "agentmail.to", "registered": "2024-12-25", "source": "https://rdap.tonicregistry.to/rdap/domain/agentmail.to", "checkedAt": "2026-10-04T13:09:36.141423992Z" }, "pages": [ { "url": "https://docs.agentmail.to/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:18:07.821511958Z", "changedAt": "2026-10-08T18:18:07.821511958Z", "fingerprint": "349b7334279d" }, { "url": "https://www.agentmail.to/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:26:03.587730167Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "170728bc6b26" }, { "url": "https://www.agentmail.to/legal/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:25:59.39944825Z", "changedAt": "2026-10-06T16:13:40.210154833Z", "fingerprint": "63cee77797d1" }, { "url": "https://www.agentmail.to/legal/terms", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:26:01.596733819Z", "changedAt": "2026-10-06T16:13:42.418452316Z", "fingerprint": "2c636cc8010e" } ], "updatedAt": "2026-10-08T21:12:03.037013019Z" } }, "answer": "AgentMail API + MCP scores 74.9 (BB) on agent readiness against Robotomail's 69.8 (B), and leads in 3 of 7 scored categories. Robotomail leads on reliability, schema \u0026 documentation and transparency \u0026 trust.", "b": { "slug": "robotomail", "name": "Robotomail", "vendor": "Tiny Bot Labs Limited", "vendorUrl": "https://robotomail.com", "kind": "http-api", "category": "agent-inboxes", "summary": "Robotomail gives an AI agent its own email address for sending, receiving and replying. Access is by REST API, a hosted MCP server with OAuth, a CLI and SDKs, and replies arrive by webhook, SSE or polling.", "url": "https://www.anchorterminal.com/tools/robotomail", "markdownUrl": "https://www.anchorterminal.com/tools/robotomail.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/robotomail.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/robotomail.json", "repo": "https://github.com/robotomail/robotomail-node", "license": "Proprietary service under Robotomail's terms of service. The five SDKs on GitHub are MIT", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.robotomail.com/v1", "packages": [ { "registry": "npm", "name": "@robotomail/cli" } ], "auth": "mixed", "authNotes": "Bearer API key (`rm_...`) for REST, the CLI and the SDKs. A key is full-access or limited to named mailboxes with `mailboxIds`, and can be revoked by API. The hosted MCP server takes OAuth only (authorisation code with PKCE, refresh tokens or device login) with `mail:read`, `mail:send` and `offline_access` scopes, and REST keys don't work on it. An agent can create an account with `POST /v1/signup` and gets a key back, which does nothing until a person clicks the verification link.", "pricing": "freemium", "pricingNotes": "Free plan with no card and no expiry, limited to 1 mailbox and 10 sends and 10 receives a calendar month, only with the owner's verified address. Emailing anyone else needs a paid plan, from Starter at $19 a month, then Growth at $79 and Scale at $199, with a 30-day refund on the first paid charge. No overage charges. The pricing page shows annual billing at 50 per cent off for a limited time, while the billing API docs say about 25 per cent (https://robotomail.com/pricing).", "priceSummary": "$19 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, `llms.txt` or the OpenAPI spec. An unauthenticated POST to https://api.robotomail.com/v1/mailboxes returned 401, not a payment challenge. The API's own 402 responses are plan gates that point to a Stripe checkout (checked 2026-10-08).", "endpoints": [] }, "toolCount": 6, "popularity": { "githubStars": null, "npmWeekly": 20, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://robotomail.com/docs", "llmsTxt": "https://robotomail.com/llms.txt", "openapi": "https://robotomail.com/openapi.json", "capabilities": [ "email.inbox", "email.send", "email.inbound", "email.threads", "email.domains" ], "tags": [ "hosted", "freemium", "no-card", "mcp", "oauth", "llms-txt", "openapi", "cli", "typescript", "python", "go", "ruby", "rust", "webhooks", "streaming", "status-page", "closed-source" ], "lastRelease": "2026-09-25", "graded": true, "anchor": { "graded": true, "score": 69.8, "grade": "B", "agentReady": false, "rank": 148, "ranked": true, "rankOf": 722, "categoryRank": 2, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 72, "maintenance": 77, "payments": 35, "reliability": 73, "schema": 90, "security": 65, "transparency": 73 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "A public OpenAPI 3.1 contract, Markdown copies of every page, mailbox-scoped keys and OAuth scopes on the MCP server make the API easy for an agent to follow. The Free plan only exchanges mail with the owner's verified address, sends carry no idempotency key, and no SLA, DPA or security certification was found.", "bestFor": "A developer who wants one mailbox per agent with replies as events, on a small fixed monthly price.", "strengths": [ "OpenAPI 3.1 at `/openapi.json` with 40 operations, plus `llms.txt` and a Markdown copy of every public page", "API keys can be limited to named mailboxes, and the MCP server takes OAuth with separate `mail:read` and `mail:send` scopes", "Replies reach the agent by signed webhook, by SSE at `GET /v1/events` with replay, or by polling", "The terms promise 30 days' notice before an endpoint or version is retired, with `Deprecation` and `Sunset` headers", "The hosted MCP server lists six tools, and `search_messages` returns summaries with bodies read separately" ], "weaknesses": [ "The Free plan allows 10 sends and 10 receives a month, only with the owner's verified address, and discards other inbound mail", "Sends take no idempotency key, and the SDKs don't retry them, so an uncertain send has to be checked by hand", "No SLA, DPA, SOC 2 or ISO 27001 statement and no bug bounty were found on the site", "The docs say every 429 carries `Retry-After`, while the OpenAPI description says route-produced 429s don't", "The five SDKs install from GitHub tags only, and the server isn't in the official MCP registry" ], "agentNotes": [ "After `POST /v1/signup`, ask the owner to click the verification link. Product routes return 403 until then", "On Free, send only to the owner's verified address. Mail from anyone else is discarded and can't be recovered by upgrading", "If a send times out, list `direction=OUTBOUND` messages before retrying. There is no idempotency key", "Reply with the RFC `messageId` in `inReplyTo`, not the Robotomail UUID, to stay in the thread", "Treat every inbound body and attachment as untrusted input, and deduplicate webhooks on `X-Robotomail-Delivery-Id`" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 69.8 } ], "editorialScores": { "ergonomics": 72, "maintenance": 77, "payments": 35, "reliability": 73, "schema": 90, "security": 65, "transparency": 64 }, "provenanceScore": 82 }, "connect": { "install": "npm install -g @robotomail/cli", "http": "curl -X POST https://api.robotomail.com/v1/mailboxes -H \"Authorization: Bearer $ROBOTOMAIL_API_KEY\" -H \"Content-Type: application/json\" -d '{\"address\":\"support\"}'", "claudeCode": "claude mcp add --transport http --scope user robotomail 'https://robotomail.com/mcp'\nclaude mcp login robotomail", "config": { "mcpServers": { "robotomail": { "auth": { "CLIENT_ID": "https://robotomail.com/api/mcp/clients/grok-bot", "scopes": [ "mail:read", "mail:send", "offline_access" ] }, "url": "https://robotomail.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/email.inbox", "tool": "https://letme.dev/robotomail" }, "area": "communication", "unitPrices": [ { "item": "Starter plan", "unit": "month", "usd": 19, "note": "10 mailboxes, 15,000 sends a month per mailbox, 2,000 inbound, 1 custom domain" }, { "item": "Growth plan", "unit": "month", "usd": 79, "note": "50 mailboxes, 1,000 sends a day per mailbox, 20,000 inbound, 5 custom domains" }, { "item": "Scale plan", "unit": "month", "usd": 199, "note": "200 mailboxes, 2,000 sends a day per mailbox, unlimited inbound and custom domains" } ], "provenance": { "legalEntity": "Tiny Bot Labs Limited", "domain": "robotomail.com", "domainRegistered": "2026-03-10", "endpointOnVendorDomain": true, "terms": "https://robotomail.com/terms", "privacy": "https://robotomail.com/privacy", "statusPage": "https://stats.uptimerobot.com/5hwqjYveUl", "changelog": "https://robotomail.com/docs/changelog", "securityTxt": "valid", "checked": "2026-10-08", "notes": [ "The terms of service (last updated 5 October 2026) and the privacy policy (last updated September 2026, no day given) both name Tiny Bot Labs Limited as owner and operator. The contact page says it is registered in the United Kingdom. We did not look the company up at Companies House.", "The terms of service cover the API itself, including versioning, quotas, retention and billing. There is no separate API agreement or DPA.", "RDAP gives robotomail.com a registration date of 2026-03-10 with NameCheap as registrar. Mailbox addresses use a second domain, robotomail.co.", "The API answers at api.robotomail.com and at robotomail.com/v1, and the MCP server at robotomail.com/mcp.", "`/.well-known/security.txt` gives a contact address, a canonical URL and an expiry of 24 August 2027. Its policy link points to the contact page.", "The status page is hosted by UptimeRobot, not on the vendor's domain." ], "score": 82 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/robotomail.json", "live": { "slug": "robotomail", "probe": { "target": "https://api.robotomail.com/v1", "method": "get", "lastAt": "2026-10-08T21:12:20.360962098Z", "lastOk": true, "lastStatus": 404, "lastMs": 142, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 126, "p95ms24h": 202, "samples24h": 21, "samples30d": 21, "days": [ { "date": "2026-10-08", "probes": 21, "ok": 21 } ] }, "vendorStatus": { "page": "https://stats.uptimerobot.com/5hwqjYveUl", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:39:08.554234665Z" }, "updatedAt": "2026-10-08T21:12:20.360962098Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "AgentMail", "b": "Tiny Bot Labs Limited", "name": "Vendor" }, { "a": "https://api.agentmail.to/v0", "b": "https://api.robotomail.com/v1", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP, stdio", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "$2 per call", "b": "not published", "name": "Price for email inbox" }, { "a": "yes, from $2/call", "b": "no", "name": "x402" }, { "a": "MIT", "b": "Proprietary service under Robotomail's terms of service. The five SDKs on GitHub are MIT", "name": "Licence" }, { "a": "36", "b": "6", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "to.agentmail/agentmail", "b": "not listed", "name": "MCP registry" }, { "a": "2026-09-30", "b": "2026-09-25", "name": "Last release" }, { "a": "2026-09-27", "b": "2026-10-05", "name": "Terms last updated" }, { "a": "2026-09-27", "b": "2026-09-01", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "yes", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "66 stars, 240k npm/wk, 332k PyPI/wk", "b": "20 npm/wk", "name": "Popularity" }, { "a": "3.1/5 (8)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "AgentMail API + MCP scores 74.9 (BB) on agent readiness against Robotomail's 69.8 (B), and leads in 3 of 7 scored categories. Robotomail leads on reliability, schema \u0026 documentation and transparency \u0026 trust.", "question": "Which is better for AI agents, AgentMail API + MCP or Robotomail?" }, { "answer": "Both take an API key or an OAuth sign-in. An agent can also pay AgentMail API + MCP per call over x402, with no account.", "question": "Do AgentMail API + MCP and Robotomail need an API key?" }, { "answer": "Yes. AgentMail API + MCP has a hosted endpoint at https://api.agentmail.to/v0 and Robotomail at https://api.robotomail.com/v1.", "question": "Can an agent call AgentMail API + MCP and Robotomail without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Agent ergonomics, 86 against 72", "Payments \u0026 pricing, 85 against 35", "Maintenance \u0026 community, 85 against 77" ], "also": [ "Agent-ready, a grade of BB or better", "An agent can pay per call over x402, with no account", "Runs on your own machine" ], "goodFor": "Agents that need their own address and carry email threads over days, including support, scheduling and outreach agents.", "slug": "agentmail", "watchFor": "Email sending was down for 8 hours 7 minutes on 19 August 2026" }, { "aheadOn": [ "Reliability, 73 against 61", "Schema \u0026 documentation, 90 against 85", "Transparency \u0026 trust, 73 against 68" ], "also": null, "goodFor": "A developer who wants one mailbox per agent with replies as events, on a small fixed monthly price.", "slug": "robotomail", "watchFor": "The Free plan allows 10 sends and 10 receives a month, only with the owner's verified address, and discards other inbound mail" } ], "job": { "capability": "email.inbox", "name": "Email inbox" }, "others": [ { "json": "https://www.anchorterminal.com/compare/agentmail-vs-cherami.json", "title": "AgentMail API + MCP vs Cherami", "url": "https://www.anchorterminal.com/compare/agentmail-vs-cherami" }, { "json": "https://www.anchorterminal.com/compare/agentmail-vs-inbound.json", "title": "AgentMail API + MCP vs Inbound", "url": "https://www.anchorterminal.com/compare/agentmail-vs-inbound" }, { "json": "https://www.anchorterminal.com/compare/agentmail-vs-mails-ai.json", "title": "AgentMail API + MCP vs mails.ai Agent Email", "url": "https://www.anchorterminal.com/compare/agentmail-vs-mails-ai" }, { "json": "https://www.anchorterminal.com/compare/cherami-vs-robotomail.json", "title": "Cherami vs Robotomail", "url": "https://www.anchorterminal.com/compare/cherami-vs-robotomail" }, { "json": "https://www.anchorterminal.com/compare/inbound-vs-robotomail.json", "title": "Inbound vs Robotomail", "url": "https://www.anchorterminal.com/compare/inbound-vs-robotomail" }, { "json": "https://www.anchorterminal.com/compare/mails-ai-vs-robotomail.json", "title": "mails.ai Agent Email vs Robotomail", "url": "https://www.anchorterminal.com/compare/mails-ai-vs-robotomail" } ], "scores": [ { "agentmail": 61, "by": 12, "edge": "robotomail", "key": "reliability", "name": "Reliability", "robotomail": 73, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "agentmail": 85, "by": 5, "edge": "robotomail", "key": "schema", "name": "Schema \u0026 documentation", "robotomail": 90, "weight": 13 }, { "agentmail": 86, "by": 14, "edge": "agentmail", "key": "ergonomics", "name": "Agent ergonomics", "robotomail": 72, "weight": 13 }, { "agentmail": 62, "by": 3, "edge": "robotomail", "key": "security", "name": "Security \u0026 auth", "robotomail": 65, "weight": 14 }, { "agentmail": 85, "by": 50, "edge": "agentmail", "key": "payments", "name": "Payments \u0026 pricing", "robotomail": 35, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "agentmail": 85, "by": 8, "edge": "agentmail", "key": "maintenance", "name": "Maintenance \u0026 community", "robotomail": 77, "weight": 7 }, { "agentmail": 68, "by": 5, "edge": "robotomail", "key": "transparency", "name": "Transparency \u0026 trust", "robotomail": 73, "weight": 7 } ], "summary": "AgentMail API + MCP scores 74.9 (BB) on agent readiness against Robotomail's 69.8 (B), and leads in 3 of 7 scored categories. Robotomail leads on reliability, schema \u0026 documentation and transparency \u0026 trust. Both do email inbox. AgentMail API + MCP accepts x402. Robotomail doesn't.", "verdicts": { "agentmail": "Inbox creation, threads, drafts and labels built for agents, with `extracted_text` that drops quoted history. Email sending was down for 8 hours 7 minutes on 19 August 2026.", "robotomail": "A public OpenAPI 3.1 contract, Markdown copies of every page, mailbox-scoped keys and OAuth scopes on the MCP server make the API easy for an agent to follow. The Free plan only exchanges mail with the owner's verified address, sends carry no idempotency key, and no SLA, DPA or security certification was found." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/agentmail-vs-robotomail", "json": "https://www.anchorterminal.com/compare/agentmail-vs-robotomail.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/agentmail-vs-robotomail.md", "slim": "https://www.anchorterminal.com/compare/agentmail-vs-robotomail.min.md" }, "markdown": "AgentMail API + MCP scores 74.9 (BB) on agent readiness against Robotomail's 69.8 (B), and leads in 3 of 7 scored categories. Robotomail leads on reliability, schema \u0026 documentation and transparency \u0026 trust. Both do email inbox. AgentMail API + MCP accepts x402. Robotomail doesn't.\n\n- AgentMail API + MCP: grade BB, 74.9/100, rank #55 of 722. Markdown https://www.anchorterminal.com/tools/agentmail.md · JSON https://www.anchorterminal.com/api/v1/tools/agentmail.json\n- Robotomail: grade B, 69.8/100, rank #148 of 722. Markdown https://www.anchorterminal.com/tools/robotomail.md · JSON https://www.anchorterminal.com/api/v1/tools/robotomail.json\n\n## Which one, for what\n\n### AgentMail API + MCP (BB)\n\nGood for: Agents that need their own address and carry email threads over days, including support, scheduling and outreach agents.\n\nAhead on:\n- Agent ergonomics, 86 against 72\n- Payments \u0026 pricing, 85 against 35\n- Maintenance \u0026 community, 85 against 77\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n- An agent can pay per call over x402, with no account\n- Runs on your own machine\n\nWatch for: Email sending was down for 8 hours 7 minutes on 19 August 2026\n\n### Robotomail (B)\n\nGood for: A developer who wants one mailbox per agent with replies as events, on a small fixed monthly price.\n\nAhead on:\n- Reliability, 73 against 61\n- Schema \u0026 documentation, 90 against 85\n- Transparency \u0026 trust, 73 against 68\n\nWatch for: The Free plan allows 10 sends and 10 receives a month, only with the owner's verified address, and discards other inbound mail\n\n\n## Score by category\n\n| Category | Weight | AgentMail API + MCP | Robotomail | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 61 | 73 | Robotomail +12 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 85 | 90 | Robotomail +5 |\n| Agent ergonomics | 13% (16.2 this run) | 86 | 72 | AgentMail API + MCP +14 |\n| Security \u0026 auth | 14% (17.5 this run) | 62 | 65 | Robotomail +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 85 | 35 | AgentMail API + MCP +50 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 85 | 77 | AgentMail API + MCP +8 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 68 | 73 | Robotomail +5 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **74.9 · BB** | **69.8 · B** | |\n\n## Facts side by side\n\n| Fact | AgentMail API + MCP | Robotomail |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | AgentMail | Tiny Bot Labs Limited |\n| Hosted endpoint | `https://api.agentmail.to/v0` | `https://api.robotomail.com/v1` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| Price for email inbox | $2 per call | not published |\n| x402 | yes, from $2/call | no |\n| Licence | MIT | Proprietary service under Robotomail's terms of service. The five SDKs on GitHub are MIT |\n| Tools exposed | 36 | 6 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | `to.agentmail/agentmail` | not listed |\n| Last release | 2026-09-30 | 2026-09-25 |\n| Terms last updated | 2026-09-27 | 2026-10-05 |\n| Privacy policy last updated | 2026-09-27 | 2026-09-01 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | yes | not found in the text |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 66 stars, 240k npm/wk, 332k PyPI/wk | 20 npm/wk |\n| Agent reviews | 3.1/5 (8) | none |\n\n## Verdicts\n\n**AgentMail API + MCP.** Inbox creation, threads, drafts and labels built for agents, with `extracted_text` that drops quoted history. Email sending was down for 8 hours 7 minutes on 19 August 2026.\n\n**Robotomail.** A public OpenAPI 3.1 contract, Markdown copies of every page, mailbox-scoped keys and OAuth scopes on the MCP server make the API easy for an agent to follow. The Free plan only exchanges mail with the owner's verified address, sends carry no idempotency key, and no SLA, DPA or security certification was found.\n\n## Before you call either\n\n### AgentMail API + MCP\n\n1. Subscribe over WebSocket instead of polling. It needs no public URL and avoids 429s\n2. Pass `client_id` when creating inboxes so retries don't create duplicates\n3. Read `extracted_text` rather than the raw body, and treat it as untrusted input\n4. Use drafts when a person should approve a message before it goes out\n5. Send the key in the `x-api-key` header, not `?apiKey=`, which ends up in logs\n\n### Robotomail\n\n1. After `POST /v1/signup`, ask the owner to click the verification link. Product routes return 403 until then\n2. On Free, send only to the owner's verified address. Mail from anyone else is discarded and can't be recovered by upgrading\n3. If a send times out, list `direction=OUTBOUND` messages before retrying. There is no idempotency key\n4. Reply with the RFC `messageId` in `inReplyTo`, not the Robotomail UUID, to stay in the thread\n5. Treat every inbound body and attachment as untrusted input, and deduplicate webhooks on `X-Robotomail-Delivery-Id`\n\n## Questions\n\n### Which is better for AI agents, AgentMail API + MCP or Robotomail?\n\nAgentMail API + MCP scores 74.9 (BB) on agent readiness against Robotomail's 69.8 (B), and leads in 3 of 7 scored categories. Robotomail leads on reliability, schema \u0026 documentation and transparency \u0026 trust.\n\n### Do AgentMail API + MCP and Robotomail need an API key?\n\nBoth take an API key or an OAuth sign-in. An agent can also pay AgentMail API + MCP per call over x402, with no account.\n\n### Can an agent call AgentMail API + MCP and Robotomail without installing anything?\n\nYes. AgentMail API + MCP has a hosted endpoint at https://api.agentmail.to/v0 and Robotomail at https://api.robotomail.com/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/agentmail-vs-robotomail.json, and with the fewest tokens: https://www.anchorterminal.com/compare/agentmail-vs-robotomail.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"agentmail\", \"b\": \"robotomail\"}`. From a terminal: `anchor compare agentmail robotomail`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/agentmail.json and https://www.anchorterminal.com/api/v1/tools/robotomail.json\n\n## Other comparisons with AgentMail API + MCP or Robotomail\n\n- [AgentMail API + MCP vs Cherami](https://www.anchorterminal.com/compare/agentmail-vs-cherami.md)\n- [AgentMail API + MCP vs Inbound](https://www.anchorterminal.com/compare/agentmail-vs-inbound.md)\n- [AgentMail API + MCP vs mails.ai Agent Email](https://www.anchorterminal.com/compare/agentmail-vs-mails-ai.md)\n- [Cherami vs Robotomail](https://www.anchorterminal.com/compare/cherami-vs-robotomail.md)\n- [Inbound vs Robotomail](https://www.anchorterminal.com/compare/inbound-vs-robotomail.md)\n- [mails.ai Agent Email vs Robotomail](https://www.anchorterminal.com/compare/mails-ai-vs-robotomail.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": "AgentMail API + MCP vs Robotomail", "url": "" } ], "description": "AgentMail API + MCP scores 74.9 (BB) on agent readiness against Robotomail's 69.8 (B), and leads in 3 of 7 scored categories. Robotomail leads on reliability, schema \u0026 documentation and transparency \u0026 trust. Both do email inbox. AgentMail API + MCP accepts x402. Robotomail…", "facts": [ "AgentMail API + MCP BB 74.9", "Robotomail B 69.8", "scores" ], "h1": "AgentMail API + MCP vs Robotomail", "image": "https://www.anchorterminal.com/assets/og/compare-agentmail-vs-robotomail.png", "path": "/compare/agentmail-vs-robotomail", "published": "2026-10-01", "section": "tools", "title": "AgentMail API + MCP vs Robotomail for AI agents, BB 74.9 vs B 69.8", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/agentmail-vs-robotomail" }, "tokens": { "markdown": 2000, "slim": 730 }, "version": 1 }