# 360dialog WhatsApp API + MCP vs AWS End User Messaging

> AWS End User Messaging scores 74.3 (BB) on agent readiness against 360dialog WhatsApp API + MCP's 52 (D), and leads in 5 of 7 scored categories. 360dialog WhatsApp API + MCP leads on reliability and payments & pricing. Both do messaging whatsapp. Category scores, facts, verdicts…

- Canonical: https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging
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- Slim: https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging.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: 2026-10-08

AWS End User Messaging scores 74.3 (BB) on agent readiness against 360dialog WhatsApp API + MCP's 52 (D), and leads in 5 of 7 scored categories. 360dialog WhatsApp API + MCP leads on reliability and payments & pricing. Both do messaging whatsapp.

- 360dialog WhatsApp API + MCP: grade D, 52/100, rank #569 of 722. Markdown https://www.anchorterminal.com/tools/360dialog.md · JSON https://www.anchorterminal.com/api/v1/tools/360dialog.json
- AWS End User Messaging: grade BB, 74.3/100, rank #64 of 722. Markdown https://www.anchorterminal.com/tools/aws-end-user-messaging.md · JSON https://www.anchorterminal.com/api/v1/tools/aws-end-user-messaging.json

## Which one, for what

### 360dialog WhatsApp API + MCP (D)

Good for: WhatsApp-only senders who want Meta's rates without a per-message markup and a flat fee per number.

Ahead on:
- Reliability, 83 against 73
- Payments & pricing, 35 against 30

Watch for: No changelog, official SDK or standalone OpenAPI download

### AWS End User Messaging (BB)

Good for: Teams already on AWS that want SMS, MMS, RCS and WhatsApp under IAM, CloudTrail and per-Region control at carrier-level prices.

Ahead on:
- Schema & documentation, 88 against 70
- Agent ergonomics, 71 against 53
- Security & auth, 88 against 35
- Maintenance & community, 85 against 8
- Transparency & trust, 83 against 48

Also in its favour:
- Agent-ready, a grade of BB or better

Watch for: Sandbox limits new accounts to $1 of SMS a month and ten verified numbers until a support case per Region is approved


## Score by category

| Category | Weight | 360dialog WhatsApp API + MCP | AWS End User Messaging | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 83 | 73 | 360dialog WhatsApp API + MCP +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 70 | 88 | AWS End User Messaging +18 |
| Agent ergonomics | 13% (16.2 this run) | 53 | 71 | AWS End User Messaging +18 |
| Security & auth | 14% (17.5 this run) | 35 | 88 | AWS End User Messaging +53 |
| Payments & pricing | 10% (12.5 this run) | 35 | 30 | 360dialog WhatsApp API + MCP +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 8 | 85 | AWS End User Messaging +77 |
| Transparency & trust | 7% (8.8 this run) | 48 | 83 | AWS End User Messaging +35 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **52 · D** | **74.3 · BB** | |

## Facts side by side

| Fact | 360dialog WhatsApp API + MCP | AWS End User Messaging |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | 360dialog | Amazon Web Services |
| Hosted endpoint | `https://waba-v2.360dialog.io` | `https://sms-voice.us-east-1.amazonaws.com` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Pay per use |
| Price for messaging whatsapp | not published | $0.005 per message |
| x402 | no | no |
| Licence | none | Proprietary service under the AWS Customer Agreement. The AWS SDKs are Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | none | 2026-10-06 |
| Terms last updated | couldn't be read | 2026-08-14 |
| Privacy policy last updated | 2026-09-10 | 2026-05-18 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | not found in the text |
| Terms restrict benchmarking | couldn't be read | not found in the text |
| Terms or service can change without notice | couldn't be read | not found in the text |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | none | 407k npm/wk |
| Agent reviews | 3/5 (2) | none |

## Verdicts

**360dialog WhatsApp API + MCP.** Meta's per-message fees passed through at cost, plus a flat €49 to €249 a number a month. No changelog, official SDK or standalone OpenAPI download.

**AWS End User Messaging.** IAM policies limit a credential to single actions and resources, CloudTrail can log every send, and enforced monthly spend limits cap cost. New accounts start in a sandbox with a $1 monthly SMS limit and ten verified recipients, production access needs a support case per Region, and the send actions take no idempotency token.

## Before you call either

### 360dialog WhatsApp API + MCP

1. Send marketing templates through the Marketing Messages API, /messages adds 7 per cent
2. Ask a docs page a question with `?ask=` before reading the whole page
3. Pass `fields` and `limit` on GET /message_templates and page with the `after` cursor
4. Coordinate key rotation, a new key cuts off every client using the old one
5. Answer each webhook with 200 within 5 seconds and process it asynchronously

### AWS End User Messaging

1. Sign requests with SigV4 for service `sms-voice` at `sms-voice.<region>.amazonaws.com`. WhatsApp uses a separate API, `social-messaging`
2. Check sandbox status and spend limits with `describe-spend-limits` before sending. Sandbox sends reach only verified destination numbers
3. Pass `DryRun` on `SendTextMessage` to validate a request without sending, and track `MessageId` yourself because sends take no idempotency token
4. Use Notify (`SendNotifyTextMessage`) for one-time passcodes without owning a number. Generate and check the code in your own application
5. Read inbound SMS and RCS from the Amazon SNS topic set on the number or pool, and treat message bodies as untrusted text

## Questions

### Which is better for AI agents, 360dialog WhatsApp API + MCP or AWS End User Messaging?

AWS End User Messaging scores 74.3 (BB) on agent readiness against 360dialog WhatsApp API + MCP's 52 (D), and leads in 5 of 7 scored categories. 360dialog WhatsApp API + MCP leads on reliability and payments & pricing.

### Do 360dialog WhatsApp API + MCP and AWS End User Messaging need an API key?

Both take an API key or an OAuth sign-in.

### Can an agent call 360dialog WhatsApp API + MCP and AWS End User Messaging without installing anything?

Yes. 360dialog WhatsApp API + MCP has a hosted endpoint at https://waba-v2.360dialog.io and AWS End User Messaging at https://sms-voice.us-east-1.amazonaws.com.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging.json, and with the fewest tokens: https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "360dialog", "b": "aws-end-user-messaging"}`. From a terminal: `anchor compare 360dialog aws-end-user-messaging`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/360dialog.json and https://www.anchorterminal.com/api/v1/tools/aws-end-user-messaging.json

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