# Firebase Cloud Messaging API API

> Firebase Cloud Messaging API API on Apizie: 6 endpoints (Send a message to specified target (a [Firebase Installation ID…, Lists TopicSubscriptions for a given app instance., Creates a TopicSubscription. Subscribes an app installation instance (by registration_id, either FID or FCM…, Gets a TopicSubscription., …) returned as clean JSON through one API key. Send your own provider key in the x-upstream-key header. Call it over REST at https://zieapi.vercel.app/v1/analytics:googleapis-fcm/{endpoint} or from Claude, ChatGPT and Cursor through the Apizie MCP server. Free plan: 1,000 requests a month.

- Project key: `analytics:googleapis-fcm`
- Category: Analytics
- Status: byok
- Source: https://firebase.google.com/docs/cloud-messaging
- Page: https://zieapi.vercel.app/api/analytics/googleapis-fcm
- OpenAPI: https://zieapi.vercel.app/api/analytics/googleapis-fcm/openapi.json

FCM send API that provides a cross-platform messaging solution to reliably deliver messages.

## Endpoints

### Send a message to specified target (a [Firebase Installation ID…
`POST https://zieapi.vercel.app/v1/analytics:googleapis-fcm/fcm-projects-messages-send` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| parent | string | yes | Required. It contains the Firebase project id (i.e. the unique identifier for your Firebase project), in the format of… |
| body | object | yes | JSON request body |

### Lists TopicSubscriptions for a given app instance.
`GET https://zieapi.vercel.app/v1/analytics:googleapis-fcm/fcm-projects-registrations-topic-subscriptions-list` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| pageSize | integer | no | Optional. The maximum number of subscriptions to return. The service may return fewer than this value. If unspecified, at most 1000… |
| pageToken | string | no | Optional. A page token, received from a previous `ListTopicSubscriptions` call. Provide this to retrieve the subsequent page. |
| parent | string | yes | Required. The parent resource, which owns this collection of subscriptions. Format: projects/{project}/registrations/{registration} The… |

### Creates a TopicSubscription. Subscribes an app installation instance (by registration_id, either FID or FCM…
`POST https://zieapi.vercel.app/v1/analytics:googleapis-fcm/fcm-projects-registrations-topic-subscriptions-create` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| parent | string | yes | Required. The parent resource where this subscription will be created. Format: projects/{project}/registrations/{registration} The… |
| topicName | string | no | Required. The ID to use for the subscription, which is the topic name. This will become the last segment of the TopicSubscription's… |
| body | object | yes | JSON request body |

### Gets a TopicSubscription.
`GET https://zieapi.vercel.app/v1/analytics:googleapis-fcm/fcm-projects-registrations-topic-subscriptions-get` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| name | string | yes | Required. The name of the topic subscription to retrieve. Format:… |

### Updates a TopicSubscription. Subscribes an app installation instance by registration_id, either FID or FCM…
`POST https://zieapi.vercel.app/v1/analytics:googleapis-fcm/fcm-projects-registrations-topic-subscriptions-patch` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| allowMissing | boolean | no | Optional. If set to true, and the topic subscription is not found, a new topic subscription will be created. |
| name | string | yes | Identifier. The resource name of the subscription. Format:… |
| body | object | yes | JSON request body |

### Deletes a TopicSubscription.
`POST https://zieapi.vercel.app/v1/analytics:googleapis-fcm/fcm-projects-registrations-topic-subscriptions-delete` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| allowMissing | boolean | no | Optional. If set to true, and the topic subscription is not found, the request will succeed but no action will be taken on the server. |
| name | string | yes | Required. The name of the topic subscription to delete. Format:… |

## Example
```
curl "https://zieapi.vercel.app/v1/analytics:googleapis-fcm/fcm-projects-messages-send" \
  -H "x-api-key: $APIZIE_KEY" \
  -H "x-upstream-key: $PROVIDER_KEY"
```

## FAQ

### How do I call the Firebase Cloud Messaging API API?
Create a free Apizie key, then send POST https://zieapi.vercel.app/v1/analytics:googleapis-fcm/fcm-projects-messages-send with the header x-api-key. Every endpoint returns { project, data, timestamp }.

### Is the Firebase Cloud Messaging API API free on Apizie?
Yes. The Free plan includes 1,000 requests a month at 100 requests a minute, no credit card. Firebase Cloud Messaging API itself also needs your own key from googleapis.com.

### Can AI agents use the Firebase Cloud Messaging API API?
Yes. Add the Apizie MCP server (https://zieapi.vercel.app/mcp) to Claude, ChatGPT, Cursor or VS Code, then ask in plain language. The agent calls run_scraper with project key analytics:googleapis-fcm.

### What is the status of the Firebase Cloud Messaging API API?
Needs your own provider key (bring your own key)