Required. It contains the Firebase project id (i.e. the unique identifier for your Firebase project), in the format of projects/{project_id}. The numeric project number with no padding is also supported in the format of projects/{project_number}.
Request body
The request body contains data with the following structure:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-05-29 UTC."],[],[],null,["Send a message to specified target (a registration token, topic or condition).\n\nHTTP request\n\n`POST https://fcm.googleapis.com/v1/{parent=projects/*}/messages:send`\n\nThe URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\nPath parameters\n\nRequest body\n\nThe request body contains data with the following structure:\n\nResponse body\n\nIf successful, the response body contains an instance of [Message](/docs/reference/fcm/rest/v1/projects.messages#Message).\n\nAuthorization scopes\n\nRequires one of the following OAuth scopes:\n\n- `https://www.googleapis.com/auth/firebase.messaging`\n- `https://www.googleapis.com/auth/cloud-platform`\n\nFor more information, see the [OAuth 2.0 Overview](https://developers.google.com/identity/protocols/OAuth2)."]]