{ "data": { "a": { "slug": "aurinko-email", "name": "Aurinko Email API", "vendor": "Yoxel, Inc.", "vendorUrl": "https://www.aurinko.io", "kind": "http-api", "category": "mailbox-access", "summary": "Unified email REST API from Yoxel, Inc. It reads, searches, drafts and sends mail in a user's own mailbox on Gmail, Office 365, Outlook.com, Exchange, Zoho Mail, iCloud and IMAP, with delta sync, open and reply tracking and webhooks.", "url": "https://www.anchorterminal.com/tools/aurinko-email", "markdownUrl": "https://www.anchorterminal.com/tools/aurinko-email.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/aurinko-email.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/aurinko-email.json", "license": "Proprietary service under Yoxel's Terms of Services Agreement", "transports": [ "http" ], "remoteUrl": "https://api.aurinko.io", "packages": [], "auth": "oauth", "authNotes": "Self-serve. A developer signs up at app.aurinko.io and gets a client ID and secret for each application. Each mailbox owner connects through Aurinko's OAuth flow at `/v1/auth/authorize`, and the resulting account access token is sent as a Bearer token. Mail scopes are `Mail.Read`, `Mail.ReadWrite`, `Mail.Send` and `Mail.Drafts`. IMAP, iCloud and Exchange accounts connect with a password or app password. Gmail access needs the developer's own Google OAuth app, since Aurinko's default registration excludes Google email, and production Office 365 needs an Azure registration.", "pricing": "paid", "pricingNotes": "$1.50 an active account a month for Email (non-IMAP) with up to 1 GB of traffic, and $2 for any number of APIs including IMAP with unlimited traffic, per the billing FAQ. A 14-day trial gives full API access, and requests are blocked when it ends without a card on file. No free tier or sandbox beyond the trial (https://docs.aurinko.io/faq/how-does-aurinko-billing-work).", "priceSummary": "Paid", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, the OpenAPI description or the pricing page (checked 2026-10-09).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-09" }, "docsUrl": "https://docs.aurinko.io/unified-apis/email-api", "llmsTxt": "https://docs.aurinko.io/llms.txt", "openapi": "https://apirefs.aurinko.io/assets/swagger.json", "capabilities": [ "mailbox.read", "mailbox.search", "mailbox.send", "mailbox.drafts", "mailbox.sync", "email.threads" ], "tags": [ "hosted", "oauth", "openapi", "llms-txt", "webhooks", "closed-source", "free-trial" ], "graded": true, "anchor": { "graded": true, "score": 44.2, "grade": "E", "agentReady": false, "rank": 878, "ranked": true, "rankOf": 950, "categoryRank": 9, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 49, "maintenance": 13, "payments": 40, "reliability": 40, "schema": 67, "security": 42, "transparency": 44 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": 0, "verdict": "One REST interface covers message search with 17 query operators, drafts, sending, folders and delta sync across seven mailbox types, at $1.50 an active account a month and with send-only and read-only scopes. No status page, SLA, changelog, idempotency key on send or official SDK was found, and SOC 2 is not yet held.", "bestFor": "A product that connects many users' Gmail and Microsoft mailboxes and wants one schema, delta sync, tracking and webhooks at a low price per account.", "strengths": [ "Public OpenAPI 3.0 description at `apirefs.aurinko.io/assets/swagger.json`, with 43 email operations, 34 of them carrying a cURL sample", "Four mail scopes. `Mail.Read` allows no writes, `Mail.Send` allows sending with no read access, and `Mail.ReadWrite` excludes send", "The `q` parameter takes 17 search operators, with a table in the docs saying where IMAP and Exchange support is partial", "Prices published per active account a month ($1.50 for email, $2 for all APIs with IMAP), with a 14-day trial", "Docs state that message contents are passed through and never stored, with only IDs and thread relations cached for sync" ], "weaknesses": [ "No status page, incident history or SLA found, and the terms supply the service as is", "No idempotency key on `POST /v1/email/messages`, so a retried send can deliver twice", "No changelog, deprecation policy or official SDK found in the docs or on the site", "The application's client ID and secret, sent as Basic auth, reach every connected mailbox, and IMAP accounts hand Aurinko a mailbox password", "The terms of 11 August 2022 forbid robots and data extraction methods in connection with the Services. This matters before any probe is run" ], "agentNotes": [ "Use `https://api.aurinko.io/v1`. Several cURL examples in the docs print `https:/api.aurinko.io` with one slash, and one search example names the host `asti.aurinko.io`", "Do not retry `POST /v1/email/messages` blindly after a timeout. There is no idempotency key, so check Sent mail with `q=rfc822msgid:` or by subject first", "Call `POST /v1/email/sync` until `ready` is true, then page `/v1/email/sync/updated` with `pageToken` until a `nextDeltaToken` appears and store it", "Check the `omitted` array on message lists. Full bodies come only from Google and Office 365, and other providers return a snippet", "Request `Mail.Read` plus `Mail.Send` for read and send without modify rights. The docs example names `Mail.ReadOnly`, which is not in the scope list" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "E", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 44.2 } ], "editorialScores": { "ergonomics": 49, "maintenance": 13, "payments": 40, "reliability": 40, "schema": 67, "security": 42, "transparency": 27 }, "provenanceScore": 60 }, "connect": { "http": "curl -H 'Authorization: Bearer \u003caccess_token\u003e' \\\n -G https://api.aurinko.io/v1/email/messages \\\n -d q='from:alexey'" }, "letme": { "capability": "https://letme.dev/mailbox.read", "tool": "https://letme.dev/aurinko-email" }, "sameCompany": [ "aurinko-calendar" ], "area": "communication", "unitPrices": [ { "item": "Email API (non-IMAP)", "unit": "account-month", "usd": 1.5, "note": "Per active account, up to 1 GB of traffic a month" }, { "item": "Full platform, any number of APIs including IMAP", "unit": "account-month", "usd": 2, "note": "Per active account, unlimited traffic" } ], "provenance": { "legalEntity": "Yoxel, Inc.", "domain": "aurinko.io", "domainRegistered": "2019-05-08", "endpointOnVendorDomain": true, "terms": "https://www.aurinko.io/terms/", "privacy": "https://www.aurinko.io/privacy/", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "The Terms of Services Agreement, last updated 11 August 2022, names Yoxel, Inc., organised under the laws of California, and covers the API and the workspace integrations platform. Disputes go to binding arbitration under JAMS rules in San Francisco, with a 30-day opt-out.", "The privacy policy, last updated 11 August 2022, covers the site and the services, API included, and commits to Google's API Services User Data Policy and its Limited Use requirements.", "The terms forbid robots, data mining and similar data extraction or gathering methods in connection with the Services. We read a handful of public pages and sent nothing to the API host.", "The API answers at api.aurinko.io per the description file, with the portal at app.aurinko.io and the reference at apirefs.aurinko.io, all on the vendor's domain.", "www.aurinko.io/.well-known/security.txt returns 404. The security statement gives security@yoxel.com for reports.", "No status page or changelog is linked from the home page, the docs index or the description file.", "robots.txt on www.aurinko.io has one `User-agent: *` line and no rules. On docs.aurinko.io it allows every path with `Content-Signal: ai-input=yes`. apirefs.aurinko.io answered 404 for robots.txt, read as no rules.", "RDAP for aurinko.io gives a registration date of 2019-05-08." ], "score": 60 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/aurinko-email.json", "live": { "slug": "aurinko-email", "probe": { "target": "https://api.aurinko.io", "method": "get", "lastAt": "2026-10-10T03:53:19.824177005Z", "lastOk": true, "lastStatus": 404, "lastMs": 232, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 126, "p95ms24h": 280, "samples24h": 125, "samples30d": 125, "days": [ { "date": "2026-10-09", "probes": 85, "ok": 85 }, { "date": "2026-10-10", "probes": 40, "ok": 40 } ] }, "updatedAt": "2026-10-10T03:53:19.824177005Z" } }, "answer": "Fastmail API (JMAP) scores 54.1 (C) on agent readiness against Aurinko Email API's 44.2 (E), and leads in 5 of 7 scored categories. Aurinko Email API leads on schema \u0026 documentation and payments \u0026 pricing.", "b": { "slug": "fastmail", "name": "Fastmail API (JMAP)", "vendor": "Fastmail Pty Ltd", "vendorUrl": "https://www.fastmail.com", "kind": "http-api", "category": "mailbox-access", "summary": "Fastmail is a paid email, calendar and contacts host from Fastmail Pty Ltd in Melbourne. Agents reach a customer's mailbox through JMAP at api.fastmail.com, the open IETF protocol, or through the company's own MCP server.", "url": "https://www.anchorterminal.com/tools/fastmail", "markdownUrl": "https://www.anchorterminal.com/tools/fastmail.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/fastmail.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/fastmail.json", "repo": "https://github.com/fastmail/JMAP-Samples", "license": "Proprietary service under Fastmail's API Terms of Service and API Developer Policy. JMAP is an open IETF standard, and the sample code on GitHub is MIT", "transports": [ "http" ], "packages": [], "auth": "mixed", "authNotes": "Access is self-serve for the account owner. An API token is made in Settings, Privacy \u0026 Security, Manage API tokens, as type JMAP or MCP, with scopes for read-only access, Email, Email submission, Contacts and Masked Email, and is sent as `Authorization: Bearer`. Tokens are not available on Basic plans. An app distributed to other users needs OAuth 2.0 (authorisation code grant, PKCE S256, rotating refresh tokens), and the developer page says clients are registered by hand through the partnerships team. The MCP server takes OAuth or an MCP-type token, and the authorisation server metadata lists a registration endpoint.", "pricing": "paid", "pricingNotes": "API access is part of a mailbox plan, with no per-call charge. Individual is $6 a month or $60 a year, Business Standard $6 a user a month and Professional $10. Basic, at $4, has no API tokens. A trial of up to 30 days needs no card, so an agent's owner can start without a contract, with sending capped at 120 messages a day (https://www.fastmail.com/pricing/us/, checked 2026-10-08).", "priceSummary": "$6 / mo", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 on the developer page, the pricing page or the 401 responses from api.fastmail.com (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 123, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://www.fastmail.com/dev/", "capabilities": [ "mailbox.read", "mailbox.search", "mailbox.send", "mailbox.drafts", "mailbox.sync" ], "tags": [ "hosted", "paid", "trial", "jmap", "open-standard", "oauth", "api-key", "mcp", "email", "contacts", "masked-email", "status-page", "bug-bounty", "eu-data-residency" ], "lastRelease": "2026-04-22", "graded": true, "anchor": { "graded": true, "score": 54.1, "grade": "C", "agentReady": false, "rank": 694, "ranked": true, "rankOf": 950, "categoryRank": 7, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 73, "maintenance": 26, "payments": 30, "reliability": 54, "schema": 52, "security": 60, "transparency": 74 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "A mailbox API built on the open JMAP standard, with read-only tokens, six OAuth scopes and an MCP server that separates read, write and send access. Fastmail publishes no OpenAPI file, SDK, API changelog, request rate limit or SLA, and its customer terms forbid programmatically generated email to addresses outside the account.", "bestFor": "An agent working in its owner's own Fastmail mailbox, where JMAP gives batched reads, structured search and state-based sync on an open standard, and MCP gives a ready connection with read, write and send levels.", "strengths": [ "JMAP is an IETF standard (RFC 8620, 8621 and 9610), so requests, types and errors are specified in public and not tied to one vendor", "API tokens can be read-only or limited to mail, sending, contacts or Masked Email, and are revocable in settings", "OAuth 2.0 requires PKCE with S256, rotates refresh tokens on every use and revokes the grant if an old one is replayed", "The MCP server at `https://api.fastmail.com/mcp`, launched 22 April 2026, has separate read, write and send levels chosen on the consent screen", "`properties`, `limit`, `bodyProperties` and `maxBodyValueBytes` size responses, and several calls batch into one request with back-references", "30-day trial with no card, a privacy policy with stated retention periods and a published list of 36 subprocessors" ], "weaknesses": [ "The customer terms forbid programmatically generated email to addresses outside the account, and say the service is not for machine-to-machine workflows", "No OpenAPI file, llms.txt, official SDK or API changelog. The developer page points to the RFCs and four sample scripts", "No request rate limit, Retry-After guidance or SLA was found, and the API terms allow backwards-incompatible changes with notice only promised as an attempt", "Three partial outages between 25 August and 7 October 2026 blocked access for some users for 8 hours 16 minutes, 1 hour 8 minutes and 5 hours 23 minutes", "API tokens are not available on Basic plans, and the developer page says OAuth clients are registered by hand through the partnerships team", "No idempotency key on `EmailSubmission/set`, no confirmation step for delete or send, and no per-call access log", "Fastmail says it has not pursued SOC certification, and no ISO 27001 certificate was found" ], "agentNotes": [ "Fetch `https://api.fastmail.com/jmap/session` with `Authorization: Bearer \u003ctoken\u003e` first. It returns the API URL, account IDs and the request limits to stay under", "Ask the owner for a read-only token unless the task writes. Sending needs both the Email and Email submission scopes", "Request only the `properties` you need. Body text is not returned unless `fetchTextBodyValues` is set, and `maxBodyValueBytes` caps it", "Sync with `Email/changes` from a stored state. On `cannotCalculateChanges`, fetch again from scratch", "Do not send generated mail to outside recipients without the owner's review. The customer terms forbid it, and trial accounts stop at 120 messages a day" ], "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": 54.1 } ], "editorialScores": { "ergonomics": 73, "maintenance": 26, "payments": 30, "reliability": 54, "schema": 52, "security": 60, "transparency": 62 }, "provenanceScore": 86 }, "connect": { "http": "curl https://api.fastmail.com/jmap/session \\\n -H \"Authorization: Bearer YOUR_API_TOKEN\"" }, "letme": { "capability": "https://letme.dev/mailbox.read", "tool": "https://letme.dev/fastmail" }, "area": "communication", "unitPrices": [ { "item": "Individual plan, billed monthly", "unit": "month", "usd": 6, "note": "one mailbox, API tokens included, 30-day trial without a card" }, { "item": "Individual plan, $60 billed yearly", "unit": "month", "usd": 5, "note": "one mailbox, API tokens included" }, { "item": "Business Standard, billed monthly", "unit": "seat-month", "usd": 6, "note": "per user, API tokens included. Basic at $4 has none" } ], "provenance": { "legalEntity": "Fastmail Pty Ltd, ACN 142 646 580, PO Box 234, Collins Street West, VIC 8007, Australia", "domain": "fastmail.com", "domainRegistered": "1994-12-09", "endpointOnVendorDomain": true, "terms": "https://www.fastmail.com/policies/api-terms-of-service/", "privacy": "https://www.fastmail.com/policies/privacy/", "statusPage": "https://fastmailstatus.com/", "changelog": "", "securityTxt": "valid", "checked": "2026-10-08", "notes": [ "The privacy policy names Fastmail Pty Ltd with ABN 31 142 646 580, and the terms of service give ACN 142 646 580, both at PO Box 234, Collins Street West, VIC 8007.", "RDAP for fastmail.com shows registration on 9 December 1994 and expiry on 8 December 2034.", "www.fastmail.com/.well-known/security.txt expires on 24 June 2027 and points to the bug bounty page for contact and policy.", "The API Terms of Service and the API Developer Policy together form the contract for API use, governed by the law of Victoria, Australia. The customer Terms of Service, last changed 10 October 2025 per its version list, govern the account the API reaches.", "The privacy policy lists versions back to 25 May 2020, the latest dated 2 July 2026.", "JMAP, OAuth and MCP all answer on api.fastmail.com. The status page is on fastmailstatus.com, hosted by Instatus.", "No API changelog was found." ], "score": 86 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/fastmail.json", "live": { "slug": "fastmail", "vendorStatus": { "page": "https://fastmailstatus.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-10T00:50:33.514978799Z" }, "githubStars": 123, "securityTxt": { "url": "https://fastmail.com/.well-known/security.txt", "state": "valid", "expires": "2027-06-24T00:00:00.000Z", "checkedAt": "2026-10-09T15:40:02.699489243Z" }, "pages": [ { "url": "https://www.fastmail.com/pricing/us/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:50:06.55208356Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "f82655a263b3" }, { "url": "https://www.fastmail.com/policies/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:50:04.525742369Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "46e72082b1b3" }, { "url": "https://www.fastmail.com/policies/api-terms-of-service/", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:50:02.423137198Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "f73a69f7e8ec" } ], "updatedAt": "2026-10-10T00:50:33.514978799Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Yoxel, Inc.", "b": "Fastmail Pty Ltd", "name": "Vendor" }, { "a": "https://api.aurinko.io", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP", "name": "Transports" }, { "a": "OAuth", "b": "OAuth or key", "name": "Auth" }, { "a": "Paid", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under Yoxel's Terms of Services Agreement", "b": "Proprietary service under Fastmail's API Terms of Service and API Developer Policy. JMAP is an open IETF standard, and the sample code on GitHub is MIT", "name": "Licence" }, { "a": "no", "b": "yes", "name": "Read-only variant documented" }, { "a": "yes", "b": "no", "name": "llms.txt" }, { "a": "none", "b": "2026-04-22", "name": "Last release" }, { "a": "2022-08-11", "b": "no date given", "name": "Terms last updated" }, { "a": "2022-08-11", "b": "no date given", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "yes", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "yes", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "none", "b": "123 stars", "name": "Popularity" } ], "faq": [ { "answer": "Fastmail API (JMAP) scores 54.1 (C) on agent readiness against Aurinko Email API's 44.2 (E), and leads in 5 of 7 scored categories. Aurinko Email API leads on schema \u0026 documentation and payments \u0026 pricing.", "question": "Which is better for AI agents, Aurinko Email API or Fastmail API (JMAP)?" }, { "answer": "Aurinko Email API uses an OAuth sign-in. Fastmail API (JMAP) takes an API key or an OAuth sign-in.", "question": "Do Aurinko Email API and Fastmail API (JMAP) need an API key?" }, { "answer": "Aurinko Email API has a hosted endpoint at https://api.aurinko.io. No hosted endpoint is listed for Fastmail API (JMAP).", "question": "Can an agent call Aurinko Email API and Fastmail API (JMAP) without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 67 against 52", "Payments \u0026 pricing, 40 against 30" ], "also": [ "A hosted endpoint, with nothing to install" ], "goodFor": "A product that connects many users' Gmail and Microsoft mailboxes and wants one schema, delta sync, tracking and webhooks at a low price per account.", "slug": "aurinko-email", "watchFor": "No status page, incident history or SLA found, and the terms supply the service as is" }, { "aheadOn": [ "Reliability, 54 against 40", "Agent ergonomics, 73 against 49", "Security \u0026 auth, 60 against 42", "Maintenance \u0026 community, 26 against 13", "Transparency \u0026 trust, 74 against 44" ], "also": null, "goodFor": "An agent working in its owner's own Fastmail mailbox, where JMAP gives batched reads, structured search and state-based sync on an open standard, and MCP gives a ready connection with read, write and send levels.", "slug": "fastmail", "watchFor": "The customer terms forbid programmatically generated email to addresses outside the account, and say the service is not for machine-to-machine workflows" } ], "job": { "capability": "mailbox.read", "name": "Mailbox access" }, "others": [ { "json": "https://www.anchorterminal.com/compare/aurinko-email-vs-emailengine.json", "title": "Aurinko Email API vs EmailEngine", "url": "https://www.anchorterminal.com/compare/aurinko-email-vs-emailengine" }, { "json": "https://www.anchorterminal.com/compare/aurinko-email-vs-gmail-api.json", "title": "Aurinko Email API vs Gmail API", "url": "https://www.anchorterminal.com/compare/aurinko-email-vs-gmail-api" }, { "json": "https://www.anchorterminal.com/compare/aurinko-email-vs-himalaya.json", "title": "Aurinko Email API vs Himalaya", "url": "https://www.anchorterminal.com/compare/aurinko-email-vs-himalaya" }, { "json": "https://www.anchorterminal.com/compare/aurinko-email-vs-nylas-email.json", "title": "Aurinko Email API vs Nylas Email API", "url": "https://www.anchorterminal.com/compare/aurinko-email-vs-nylas-email" }, { "json": "https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph.json", "title": "Aurinko Email API vs Outlook Mail (Microsoft Graph)", "url": "https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph" }, { "json": "https://www.anchorterminal.com/compare/aurinko-email-vs-unipile.json", "title": "Aurinko Email API vs Unipile", "url": "https://www.anchorterminal.com/compare/aurinko-email-vs-unipile" }, { "json": "https://www.anchorterminal.com/compare/aurinko-email-vs-zoho-mail.json", "title": "Aurinko Email API vs Zoho Mail API", "url": "https://www.anchorterminal.com/compare/aurinko-email-vs-zoho-mail" }, { "json": "https://www.anchorterminal.com/compare/emailengine-vs-fastmail.json", "title": "EmailEngine vs Fastmail API (JMAP)", "url": "https://www.anchorterminal.com/compare/emailengine-vs-fastmail" }, { "json": "https://www.anchorterminal.com/compare/fastmail-vs-gmail-api.json", "title": "Fastmail API (JMAP) vs Gmail API", "url": "https://www.anchorterminal.com/compare/fastmail-vs-gmail-api" }, { "json": "https://www.anchorterminal.com/compare/fastmail-vs-himalaya.json", "title": "Fastmail API (JMAP) vs Himalaya", "url": "https://www.anchorterminal.com/compare/fastmail-vs-himalaya" }, { "json": "https://www.anchorterminal.com/compare/fastmail-vs-nylas-email.json", "title": "Fastmail API (JMAP) vs Nylas Email API", "url": "https://www.anchorterminal.com/compare/fastmail-vs-nylas-email" }, { "json": "https://www.anchorterminal.com/compare/fastmail-vs-outlook-mail-graph.json", "title": "Fastmail API (JMAP) vs Outlook Mail (Microsoft Graph)", "url": "https://www.anchorterminal.com/compare/fastmail-vs-outlook-mail-graph" }, { "json": "https://www.anchorterminal.com/compare/fastmail-vs-unipile.json", "title": "Fastmail API (JMAP) vs Unipile", "url": "https://www.anchorterminal.com/compare/fastmail-vs-unipile" }, { "json": "https://www.anchorterminal.com/compare/fastmail-vs-zoho-mail.json", "title": "Fastmail API (JMAP) vs Zoho Mail API", "url": "https://www.anchorterminal.com/compare/fastmail-vs-zoho-mail" } ], "scores": [ { "aurinko-email": 40, "by": 14, "edge": "fastmail", "fastmail": 54, "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "aurinko-email": 67, "by": 15, "edge": "aurinko-email", "fastmail": 52, "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "aurinko-email": 49, "by": 24, "edge": "fastmail", "fastmail": 73, "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "aurinko-email": 42, "by": 18, "edge": "fastmail", "fastmail": 60, "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "aurinko-email": 40, "by": 10, "edge": "aurinko-email", "fastmail": 30, "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "aurinko-email": 13, "by": 13, "edge": "fastmail", "fastmail": 26, "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "aurinko-email": 44, "by": 30, "edge": "fastmail", "fastmail": 74, "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Fastmail API (JMAP) scores 54.1 (C) on agent readiness against Aurinko Email API's 44.2 (E), and leads in 5 of 7 scored categories. Aurinko Email API leads on schema \u0026 documentation and payments \u0026 pricing. Both do mailbox access.", "verdicts": { "aurinko-email": "One REST interface covers message search with 17 query operators, drafts, sending, folders and delta sync across seven mailbox types, at $1.50 an active account a month and with send-only and read-only scopes. No status page, SLA, changelog, idempotency key on send or official SDK was found, and SOC 2 is not yet held.", "fastmail": "A mailbox API built on the open JMAP standard, with read-only tokens, six OAuth scopes and an MCP server that separates read, write and send access. Fastmail publishes no OpenAPI file, SDK, API changelog, request rate limit or SLA, and its customer terms forbid programmatically generated email to addresses outside the account." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail", "json": "https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail.md", "slim": "https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail.min.md" }, "markdown": "Fastmail API (JMAP) scores 54.1 (C) on agent readiness against Aurinko Email API's 44.2 (E), and leads in 5 of 7 scored categories. Aurinko Email API leads on schema \u0026 documentation and payments \u0026 pricing. Both do mailbox access.\n\n- Aurinko Email API: grade E, 44.2/100, rank #878 of 950. Markdown https://www.anchorterminal.com/tools/aurinko-email.md · JSON https://www.anchorterminal.com/api/v1/tools/aurinko-email.json\n- Fastmail API (JMAP): grade C, 54.1/100, rank #694 of 950. Markdown https://www.anchorterminal.com/tools/fastmail.md · JSON https://www.anchorterminal.com/api/v1/tools/fastmail.json\n- Best mailbox access APIs for AI agents: https://www.anchorterminal.com/best/mailbox-access/index.md\n- All 36 mailboxes comparisons: https://www.anchorterminal.com/compare/mailbox-access/index.md\n\n## Which one, for what\n\n### Aurinko Email API (E)\n\nGood for: A product that connects many users' Gmail and Microsoft mailboxes and wants one schema, delta sync, tracking and webhooks at a low price per account.\n\nAhead on:\n- Schema \u0026 documentation, 67 against 52\n- Payments \u0026 pricing, 40 against 30\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n\nWatch for: No status page, incident history or SLA found, and the terms supply the service as is\n\n### Fastmail API (JMAP) (C)\n\nGood for: An agent working in its owner's own Fastmail mailbox, where JMAP gives batched reads, structured search and state-based sync on an open standard, and MCP gives a ready connection with read, write and send levels.\n\nAhead on:\n- Reliability, 54 against 40\n- Agent ergonomics, 73 against 49\n- Security \u0026 auth, 60 against 42\n- Maintenance \u0026 community, 26 against 13\n- Transparency \u0026 trust, 74 against 44\n\nWatch for: The customer terms forbid programmatically generated email to addresses outside the account, and say the service is not for machine-to-machine workflows\n\n\n## Score by category\n\n| Category | Weight | Aurinko Email API | Fastmail API (JMAP) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 40 | 54 | Fastmail API (JMAP) +14 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 67 | 52 | Aurinko Email API +15 |\n| Agent ergonomics | 13% (16.2 this run) | 49 | 73 | Fastmail API (JMAP) +24 |\n| Security \u0026 auth | 14% (17.5 this run) | 42 | 60 | Fastmail API (JMAP) +18 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 30 | Aurinko Email API +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 13 | 26 | Fastmail API (JMAP) +13 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 44 | 74 | Fastmail API (JMAP) +30 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **44.2 · E** | **54.1 · C** | |\n\n## Facts side by side\n\n| Fact | Aurinko Email API | Fastmail API (JMAP) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Yoxel, Inc. | Fastmail Pty Ltd |\n| Hosted endpoint | `https://api.aurinko.io` | no (local only) |\n| Transports | HTTP | HTTP |\n| Auth | OAuth | OAuth or key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under Yoxel's Terms of Services Agreement | Proprietary service under Fastmail's API Terms of Service and API Developer Policy. JMAP is an open IETF standard, and the sample code on GitHub is MIT |\n| Read-only variant documented | no | yes |\n| llms.txt | yes | no |\n| Last release | none | 2026-04-22 |\n| Terms last updated | 2022-08-11 | no date given |\n| Privacy policy last updated | 2022-08-11 | no date given |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | yes | not found in the text |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | none | 123 stars |\n\n## Verdicts\n\n**Aurinko Email API.** One REST interface covers message search with 17 query operators, drafts, sending, folders and delta sync across seven mailbox types, at $1.50 an active account a month and with send-only and read-only scopes. No status page, SLA, changelog, idempotency key on send or official SDK was found, and SOC 2 is not yet held.\n\n**Fastmail API (JMAP).** A mailbox API built on the open JMAP standard, with read-only tokens, six OAuth scopes and an MCP server that separates read, write and send access. Fastmail publishes no OpenAPI file, SDK, API changelog, request rate limit or SLA, and its customer terms forbid programmatically generated email to addresses outside the account.\n\n## Before you call either\n\n### Aurinko Email API\n\n1. Use `https://api.aurinko.io/v1`. Several cURL examples in the docs print `https:/api.aurinko.io` with one slash, and one search example names the host `asti.aurinko.io`\n2. Do not retry `POST /v1/email/messages` blindly after a timeout. There is no idempotency key, so check Sent mail with `q=rfc822msgid:` or by subject first\n3. Call `POST /v1/email/sync` until `ready` is true, then page `/v1/email/sync/updated` with `pageToken` until a `nextDeltaToken` appears and store it\n4. Check the `omitted` array on message lists. Full bodies come only from Google and Office 365, and other providers return a snippet\n5. Request `Mail.Read` plus `Mail.Send` for read and send without modify rights. The docs example names `Mail.ReadOnly`, which is not in the scope list\n\n### Fastmail API (JMAP)\n\n1. Fetch `https://api.fastmail.com/jmap/session` with `Authorization: Bearer \u003ctoken\u003e` first. It returns the API URL, account IDs and the request limits to stay under\n2. Ask the owner for a read-only token unless the task writes. Sending needs both the Email and Email submission scopes\n3. Request only the `properties` you need. Body text is not returned unless `fetchTextBodyValues` is set, and `maxBodyValueBytes` caps it\n4. Sync with `Email/changes` from a stored state. On `cannotCalculateChanges`, fetch again from scratch\n5. Do not send generated mail to outside recipients without the owner's review. The customer terms forbid it, and trial accounts stop at 120 messages a day\n\n## Questions\n\n### Which is better for AI agents, Aurinko Email API or Fastmail API (JMAP)?\n\nFastmail API (JMAP) scores 54.1 (C) on agent readiness against Aurinko Email API's 44.2 (E), and leads in 5 of 7 scored categories. Aurinko Email API leads on schema \u0026 documentation and payments \u0026 pricing.\n\n### Do Aurinko Email API and Fastmail API (JMAP) need an API key?\n\nAurinko Email API uses an OAuth sign-in. Fastmail API (JMAP) takes an API key or an OAuth sign-in.\n\n### Can an agent call Aurinko Email API and Fastmail API (JMAP) without installing anything?\n\nAurinko Email API has a hosted endpoint at https://api.aurinko.io. No hosted endpoint is listed for Fastmail API (JMAP).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail.json, and with the fewest tokens: https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"aurinko-email\", \"b\": \"fastmail\"}`. From a terminal: `anchor compare aurinko-email fastmail`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/aurinko-email.json and https://www.anchorterminal.com/api/v1/tools/fastmail.json\n\n## Other comparisons with Aurinko Email API or Fastmail API (JMAP)\n\n- [Aurinko Email API vs EmailEngine](https://www.anchorterminal.com/compare/aurinko-email-vs-emailengine.md)\n- [Aurinko Email API vs Gmail API](https://www.anchorterminal.com/compare/aurinko-email-vs-gmail-api.md)\n- [Aurinko Email API vs Himalaya](https://www.anchorterminal.com/compare/aurinko-email-vs-himalaya.md)\n- [Aurinko Email API vs Nylas Email API](https://www.anchorterminal.com/compare/aurinko-email-vs-nylas-email.md)\n- [Aurinko Email API vs Outlook Mail (Microsoft Graph)](https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph.md)\n- [Aurinko Email API vs Unipile](https://www.anchorterminal.com/compare/aurinko-email-vs-unipile.md)\n- [Aurinko Email API vs Zoho Mail API](https://www.anchorterminal.com/compare/aurinko-email-vs-zoho-mail.md)\n- [EmailEngine vs Fastmail API (JMAP)](https://www.anchorterminal.com/compare/emailengine-vs-fastmail.md)\n- [Fastmail API (JMAP) vs Gmail API](https://www.anchorterminal.com/compare/fastmail-vs-gmail-api.md)\n- [Fastmail API (JMAP) vs Himalaya](https://www.anchorterminal.com/compare/fastmail-vs-himalaya.md)\n- [Fastmail API (JMAP) vs Nylas Email API](https://www.anchorterminal.com/compare/fastmail-vs-nylas-email.md)\n- [Fastmail API (JMAP) vs Outlook Mail (Microsoft Graph)](https://www.anchorterminal.com/compare/fastmail-vs-outlook-mail-graph.md)\n- [Fastmail API (JMAP) vs Unipile](https://www.anchorterminal.com/compare/fastmail-vs-unipile.md)\n- [Fastmail API (JMAP) vs Zoho Mail API](https://www.anchorterminal.com/compare/fastmail-vs-zoho-mail.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "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": "Aurinko Email API vs Fastmail API (JMAP)", "url": "" } ], "description": "Fastmail scores 54.1 (C) to Aurinko Email's 44.2 (E) for mailbox access. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Aurinko Email API E 44.2", "Fastmail API (JMAP) C 54.1", "scores" ], "h1": "Aurinko Email API vs Fastmail API (JMAP)", "image": "https://www.anchorterminal.com/assets/og/compare-aurinko-email-vs-fastmail.png", "path": "/compare/aurinko-email-vs-fastmail", "published": "2026-10-01", "section": "tools", "title": "Aurinko Email vs Fastmail for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/aurinko-email-vs-fastmail" }, "tokens": { "markdown": 2450, "slim": 730 }, "version": 1 }