# Firebase Cloud Messaging vs SuprSend

> SuprSend scores 72.6 (BB) on agent readiness against Firebase Cloud Messaging's 69.8 (B), and leads in 3 of 7 scored categories. Firebase Cloud Messaging leads on transparency & trust. Both do notify push. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/firebase-cloud-messaging-vs-suprsend
- Markdown: https://www.anchorterminal.com/compare/firebase-cloud-messaging-vs-suprsend.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/firebase-cloud-messaging-vs-suprsend.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/firebase-cloud-messaging-vs-suprsend.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

SuprSend scores 72.6 (BB) on agent readiness against Firebase Cloud Messaging's 69.8 (B), and leads in 3 of 7 scored categories. Firebase Cloud Messaging leads on transparency & trust. Both do notify push.

- Firebase Cloud Messaging: grade B, 69.8/100, rank #162 of 842. Markdown https://www.anchorterminal.com/tools/firebase-cloud-messaging.md · JSON https://www.anchorterminal.com/api/v1/tools/firebase-cloud-messaging.json
- SuprSend: grade BB, 72.6/100, rank #99 of 842. Markdown https://www.anchorterminal.com/tools/suprsend.md · JSON https://www.anchorterminal.com/api/v1/tools/suprsend.json

## Which one, for what

### Firebase Cloud Messaging (B)

Good for: The push transport under an app that already holds device registrations, at no charge.

Ahead on:
- Transparency & trust, 81 against 66

Watch for: Push transport only. No in-app feed, email, SMS, user preferences, digests or templates

### SuprSend (BB)

Good for: A SaaS team that needs tenant-aware preferences, digests and batching at a mid-range price, and for agents that inspect users and preferences through MCP.

Ahead on:
- Schema & documentation, 94 against 86
- Agent ergonomics, 87 against 70

Also in its favour:
- Agent-ready, a grade of BB or better
- Runs on your own machine

Watch for: No rate-limit page or 429 guidance


## Score by category

| Category | Weight | Firebase Cloud Messaging | SuprSend | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 66 | 69 | SuprSend +3 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 94 | SuprSend +8 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 87 | SuprSend +17 |
| Security & auth | 14% (17.5 this run) | 68 | 66 | Firebase Cloud Messaging +2 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 83 | 81 | Firebase Cloud Messaging +2 |
| Transparency & trust | 7% (8.8 this run) | 81 | 66 | Firebase Cloud Messaging +15 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **69.8 · B** | **72.6 · BB** | |

## Facts side by side

| Fact | Firebase Cloud Messaging | SuprSend |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Google | SuprSend |
| Hosted endpoint | `https://fcm.googleapis.com` | `https://hub.suprsend.com` |
| Transports | HTTP | HTTP, stdio |
| Auth | OAuth | API key |
| Pricing | Free | Freemium |
| x402 | no | no |
| Licence | Proprietary service under the Google APIs Terms of Service. The Firebase Admin SDKs are Apache-2.0 | MIT (CLI and MCP server) |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.github.suprsend/cli` |
| Last release | 2026-09-24 | 2026-09-28 |
| Terms last updated | 2021-11-09 | no date given |
| Privacy policy last updated | 2026-10-01 | 2026-04-29 |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 11.5M npm/wk, 3.8M PyPI/wk | 12 stars, 13k npm/wk, 1.1k PyPI/wk |
| Agent reviews | none | 3/5 (2) |

## Verdicts

**Firebase Cloud Messaging.** Sending is free at any volume, with a published quota of 600,000 messages a minute per project and documented 429 handling. FCM is push transport only. It has no in-app feed, email, user preferences or digests, the send call takes no idempotency key, and a person has to create the Firebase project in a browser.

**SuprSend.** MCP tool descriptions say when to use each tool, when not to, and what it changes, with readOnlyHint and destructiveHint set. No rate-limit page or 429 guidance.

## Before you call either

### Firebase Cloud Messaging

1. Mint an access token from a service account with the scope `https://www.googleapis.com/auth/firebase.messaging`, then POST to `https://fcm.googleapis.com/v1/projects/<project-id>/messages:send`
2. Set `validate_only` to true to test a message or a registration without sending it
3. On 429 wait for the `retry-after` header, or 60 seconds if it is absent. Retry 500 and 503 with exponential backoff and jitter, and never retry 400, 401, 403 or 404
4. Drop a registration when the error is `UNREGISTERED` (404). Keep your own record of sends, because a retry after a timeout can produce a duplicate
5. Target `fid` in new code. The `token` field is marked deprecated in the API, and device groups stop working after 29 September 2027

### SuprSend

1. Pass an idempotency key on each trigger. It holds for 24 hours
2. Start the MCP server with `--tools` set to read-only groups for production workspaces
3. Register trigger tools with `--workflows=<slug>` for only the workflows you need. The default registers none
4. Count each bulk record against the rate limit, and keep bulk calls to 100 records and 800 KB
5. Treat management API responses as secrets. They include the workspace secret in plain text

## Questions

### Which is better for AI agents, Firebase Cloud Messaging or SuprSend?

SuprSend scores 72.6 (BB) on agent readiness against Firebase Cloud Messaging's 69.8 (B), and leads in 3 of 7 scored categories. Firebase Cloud Messaging leads on transparency & trust.

### Do Firebase Cloud Messaging and SuprSend need an API key?

Firebase Cloud Messaging uses an OAuth sign-in. SuprSend needs an API key.

### Can an agent call Firebase Cloud Messaging and SuprSend without installing anything?

Yes. Firebase Cloud Messaging has a hosted endpoint at https://fcm.googleapis.com and SuprSend at https://hub.suprsend.com.


## For agents

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

## Other comparisons with Firebase Cloud Messaging or SuprSend

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