# Aurinko Email API vs Outlook Mail (Microsoft Graph)

> Outlook Mail scores 66.3 (B) to Aurinko Email's 44.2 (E) for mailbox access. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph
- Markdown: https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph.md (~2,400 tokens)
- Slim: https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Outlook Mail (Microsoft Graph) scores 66.3 (B) on agent readiness against Aurinko Email API's 44.2 (E), and leads in 6 of 7 scored categories. Aurinko Email API leads on payments & pricing. Both do mailbox access.

- 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
- Outlook Mail (Microsoft Graph): grade B, 66.3/100, rank #296 of 950. Markdown https://www.anchorterminal.com/tools/outlook-mail-graph.md · JSON https://www.anchorterminal.com/api/v1/tools/outlook-mail-graph.json
- Best mailbox access APIs for AI agents: https://www.anchorterminal.com/best/mailbox-access/index.md
- All 36 mailboxes comparisons: https://www.anchorterminal.com/compare/mailbox-access/index.md

## Which one, for what

### Aurinko Email API (E)

Good 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.

Ahead on:
- Payments & pricing, 40 against 35

Also in its favour:
- No incidents deducted, where Outlook Mail (Microsoft Graph) loses 4 points for them

Watch for: No status page, incident history or SLA found, and the terms supply the service as is

### Outlook Mail (Microsoft Graph) (B)

Good for: Agents working in Microsoft 365 or Outlook.com mailboxes that need scoped reading, drafting, sending and incremental sync.

Ahead on:
- Reliability, 60 against 40
- Schema & documentation, 93 against 67
- Agent ergonomics, 81 against 49
- Security & auth, 71 against 42
- Maintenance & community, 76 against 13
- Transparency & trust, 75 against 44

Watch for: sendMail has no idempotency key and answers 202 Accepted before delivery, so a retried send can go out twice


## Score by category

| Category | Weight | Aurinko Email API | Outlook Mail (Microsoft Graph) | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 60 | Outlook Mail (Microsoft Graph) +20 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 67 | 93 | Outlook Mail (Microsoft Graph) +26 |
| Agent ergonomics | 13% (16.2 this run) | 49 | 81 | Outlook Mail (Microsoft Graph) +32 |
| Security & auth | 14% (17.5 this run) | 42 | 71 | Outlook Mail (Microsoft Graph) +29 |
| Payments & pricing | 10% (12.5 this run) | 40 | 35 | Aurinko Email API +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 13 | 76 | Outlook Mail (Microsoft Graph) +63 |
| Transparency & trust | 7% (8.8 this run) | 44 | 75 | Outlook Mail (Microsoft Graph) +31 |
| Negative events | ≤15 | 0 | -4 | |
| **Total** | | **44.2 · E** | **66.3 · B** | |

## Facts side by side

| Fact | Aurinko Email API | Outlook Mail (Microsoft Graph) |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Yoxel, Inc. | Microsoft |
| Hosted endpoint | `https://api.aurinko.io` | `https://graph.microsoft.com/v1.0` |
| Transports | HTTP | HTTP |
| Auth | OAuth | OAuth |
| Pricing | Paid | Your plan |
| x402 | no | no |
| Licence | Proprietary service under Yoxel's Terms of Services Agreement | MIT (SDKs) |
| Tools exposed | none | 10 |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | none | 2026-10-06 |
| Terms last updated | 2022-08-11 | 2025-10-01 |
| Privacy policy last updated | 2022-08-11 | 2026-09-01 |
| Customer content may train models | not found in the text | yes |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | none | 835 stars, 2.9M npm/wk, 1.6M PyPI/wk |

## Verdicts

**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.

**Outlook Mail (Microsoft Graph).** Delegated permissions split reading without bodies (Mail.ReadBasic), full reading, writing and sending, and delta queries and change notifications keep a local copy in step. sendMail takes no idempotency key and returns 202 before delivery, and each app is held to four concurrent requests per mailbox.

## Before you call either

### Aurinko Email API

1. 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`
2. 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
3. Call `POST /v1/email/sync` until `ready` is true, then page `/v1/email/sync/updated` with `pageToken` until a `nextDeltaToken` appears and store it
4. Check the `omitted` array on message lists. Full bodies come only from Google and Office 365, and other providers return a snippet
5. 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

### Outlook Mail (Microsoft Graph)

1. Create a draft with POST /me/messages, then send it with /send. A retried sendMail can send the message twice
2. Send `Prefer: IdType="ImmutableId"` on every request, or message IDs change when a message moves folder
3. Use `$select` and `Prefer: outlook.body-content-type="text"`. List messages returns HTML bodies and 10 messages a page by default
4. Honour `Retry-After` on 429 and keep to four parallel calls per mailbox. Batches of up to 20 requests are throttled per request
5. Treat message bodies as untrusted input, and ask for Mail.ReadBasic when the task doesn't need bodies

## Questions

### Which is better for AI agents, Aurinko Email API or Outlook Mail (Microsoft Graph)?

Outlook Mail (Microsoft Graph) scores 66.3 (B) on agent readiness against Aurinko Email API's 44.2 (E), and leads in 6 of 7 scored categories. Aurinko Email API leads on payments & pricing.

### Do Aurinko Email API and Outlook Mail (Microsoft Graph) need an API key?

Both use an OAuth sign-in.

### Can an agent call Aurinko Email API and Outlook Mail (Microsoft Graph) without installing anything?

Yes. Aurinko Email API has a hosted endpoint at https://api.aurinko.io and Outlook Mail (Microsoft Graph) at https://graph.microsoft.com/v1.0.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph.json, and with the fewest tokens: https://www.anchorterminal.com/compare/aurinko-email-vs-outlook-mail-graph.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "aurinko-email", "b": "outlook-mail-graph"}`. From a terminal: `anchor compare aurinko-email outlook-mail-graph`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/aurinko-email.json and https://www.anchorterminal.com/api/v1/tools/outlook-mail-graph.json

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