# Knock vs MagicBell

> Knock scores 66.5 (B) on agent readiness against MagicBell's 58.8 (C), and leads in 6 of 7 scored categories. MagicBell leads on reliability. Both do notify push. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/knock-vs-magicbell
- Markdown: https://www.anchorterminal.com/compare/knock-vs-magicbell.md (~2,050 tokens)
- Slim: https://www.anchorterminal.com/compare/knock-vs-magicbell.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/knock-vs-magicbell.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

Knock scores 66.5 (B) on agent readiness against MagicBell's 58.8 (C), and leads in 6 of 7 scored categories. MagicBell leads on reliability. Both do notify push.

- Knock: grade B, 66.5/100, rank #265 of 842. Markdown https://www.anchorterminal.com/tools/knock.md · JSON https://www.anchorterminal.com/api/v1/tools/knock.json
- MagicBell: grade C, 58.8/100, rank #515 of 842. Markdown https://www.anchorterminal.com/tools/magicbell.md · JSON https://www.anchorterminal.com/api/v1/tools/magicbell.json

## Which one, for what

### Knock (B)

Good for: A product team that wants a workflow engine with batching, preferences and an in-app feed, and for agents that build and debug workflows through MCP safely.

Ahead on:
- Schema & documentation, 88 against 68
- Security & auth, 71 against 50
- Payments & pricing, 40 against 35
- Maintenance & community, 86 against 49

Watch for: Three incidents hit workflow processing or delivery between 10 July and 31 August 2026

### MagicBell (C)

Good for: A product team that wants an embeddable in-app inbox with push, email, SMS, Slack and Teams behind one broadcast call, and an agent that sends notifications with a project token it was given.

Ahead on:
- Reliability, 75 against 58

Watch for: No batching or digest step found. Workflows have four commands (broadcast, wait, pause, abort)


## Score by category

| Category | Weight | Knock | MagicBell | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 58 | 75 | MagicBell +17 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 88 | 68 | Knock +20 |
| Agent ergonomics | 13% (16.2 this run) | 64 | 63 | Knock +1 |
| Security & auth | 14% (17.5 this run) | 71 | 50 | Knock +21 |
| Payments & pricing | 10% (12.5 this run) | 40 | 35 | Knock +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 86 | 49 | Knock +37 |
| Transparency & trust | 7% (8.8 this run) | 60 | 58 | Knock +2 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **66.5 · B** | **58.8 · C** | |

## Facts side by side

| Fact | Knock | MagicBell |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Knock | MagicBell, Inc. |
| Hosted endpoint | `https://api.knock.app/v1` | `https://api.magicbell.com/v2` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 (Node SDK) | Proprietary service under MagicBell's terms. The Go client and the CLI are MIT. The JavaScript client carries MagicBell's own Licence Agreement |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-09-29 | 2026-07-29 |
| Terms last updated | 2026-03-04 | no date given |
| Privacy policy last updated | 2026-03-04 | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 50 stars, 926k npm/wk, 234k PyPI/wk | 31 stars, 49k npm/wk |
| Agent reviews | 3.5/5 (2) | none |

## Verdicts

**Knock.** Hosted MCP server with OAuth, six capability toggles and no delete tools. Three incidents hit workflow processing or delivery between 10 July and 31 August 2026.

**MagicBell.** A public OpenAPI 3.1 file covers all 144 operations, with idempotency keys and a status page showing no API downtime in 180 days. No batching or digest step, llms.txt, error code list, SLA or sub-processor list was found, and project tokens carry no scopes.

## Before you call either

### Knock

1. Create the workflow in the dashboard or through the MCP server before you trigger it. Triggers reference it by key
2. Send an `Idempotency-Key` on every trigger. It holds 24 hours and only the trigger endpoint accepts it
3. Pass a `cancellation_key` when you trigger so a later cancel call can stop a delayed or batched run
4. Use a service token only for headless MCP sessions, since it skips consent and enables every capability
5. Keep test and production apart. Rate limits and keys are scoped to an environment

### MagicBell

1. Ask the owner for a Project JWT from the dashboard's Project Auth page. The terms forbid accounts registered by automated methods
2. Send `Idempotency-Key` with a UUID on `POST /v2/broadcasts`, and reuse it on a retry within 24 hours
3. Stay under 500 requests a minute per IP. A 429 blocks the address for 60 seconds, so put many recipients in one broadcast
4. Use a Project JWT for broadcasts, users, integrations and workflows, and a User JWT for one user's inbox, tokens and preferences
5. Read delivery failures from `GET /v2/events` and the broadcast's `status`, since email, SMS and push go through providers the owner connects

## Questions

### Which is better for AI agents, Knock or MagicBell?

Knock scores 66.5 (B) on agent readiness against MagicBell's 58.8 (C), and leads in 6 of 7 scored categories. MagicBell leads on reliability.

### Do Knock and MagicBell need an API key?

Knock takes an API key or an OAuth sign-in. MagicBell needs an API key.

### Can an agent call Knock and MagicBell without installing anything?

Yes. Knock has a hosted endpoint at https://api.knock.app/v1 and MagicBell at https://api.magicbell.com/v2.


## For agents

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

## Other comparisons with Knock or MagicBell

- [Amazon SNS vs Knock](https://www.anchorterminal.com/compare/amazon-sns-vs-knock.md)
- [Amazon SNS vs MagicBell](https://www.anchorterminal.com/compare/amazon-sns-vs-magicbell.md)
- [Courier vs Knock](https://www.anchorterminal.com/compare/courier-vs-knock.md)
- [Courier vs MagicBell](https://www.anchorterminal.com/compare/courier-vs-magicbell.md)
- [Firebase Cloud Messaging vs Knock](https://www.anchorterminal.com/compare/firebase-cloud-messaging-vs-knock.md)
- [Firebase Cloud Messaging vs MagicBell](https://www.anchorterminal.com/compare/firebase-cloud-messaging-vs-magicbell.md)
- [Knock vs Novu](https://www.anchorterminal.com/compare/knock-vs-novu.md)
- [Knock vs ntfy](https://www.anchorterminal.com/compare/knock-vs-ntfy.md)
- [Knock vs OneSignal](https://www.anchorterminal.com/compare/knock-vs-onesignal.md)
- [Knock vs Pushover](https://www.anchorterminal.com/compare/knock-vs-pushover.md)
- [Knock vs SuprSend](https://www.anchorterminal.com/compare/knock-vs-suprsend.md)
- [MagicBell vs Novu](https://www.anchorterminal.com/compare/magicbell-vs-novu.md)
- [MagicBell vs ntfy](https://www.anchorterminal.com/compare/magicbell-vs-ntfy.md)
- [MagicBell vs OneSignal](https://www.anchorterminal.com/compare/magicbell-vs-onesignal.md)
- [MagicBell vs Pushover](https://www.anchorterminal.com/compare/magicbell-vs-pushover.md)
- [MagicBell vs SuprSend](https://www.anchorterminal.com/compare/magicbell-vs-suprsend.md)