Supabase ➔ SendGrid Payload Specification

Technical reference for automating data exchange between Backend/DB and Email API workflows.

💡 How this integration works:

1. Supabase triggers an event when postgres_changes occurs.
2. Data is packaged into a standard JSON webhook payload.
3. Payload is delivered into your SendGrid intake pipeline and mapped to your Email API targets.

Authentication & Event Specs

Parameter	Source (Supabase)	Destination (SendGrid)
Auth Mechanism	`Anon / Service Role Key`	`Bearer API Key`
Trigger Event	`postgres_changes`	`Ingest Pipeline`

Sample Webhook JSON Payload

{
  "event": "postgres_changes_to_sendgrid",
  "timestamp": 1788105200,
  "source": {
    "platform": "Supabase",
    "auth_mode": "Anon / Service Role Key",
    "data": {
      "schema": "sample_schema_val",
      "table": "sample_table_val",
      "commit_timestamp": "sample_commit_timestamp_val",
      "record_data": "sample_record_data_val"
    }
  },
  "destination": {
    "platform": "SendGrid",
    "auth_mode": "Bearer API Key",
    "target_endpoint": "https://api.sendgrid.com/v1/ingest",
    "mapped_fields": {
      "msg_id": "{{source.schema}}",
      "recipient": "{{source.table}}",
      "event_type": "{{source.commit_timestamp}}",
      "smtp_code": "{{source.record_data}}"
    }
  }
}

Quick Integration Setup

Retrieve your secret API credentials from your Supabase developer dashboard using authentication method Anon / Service Role Key.
Configure the target endpoint URL to route payloads into the SendGrid intake pipeline.
Map incoming schema properties according to the JSON specification detailed above.

Expected HTTP Response Codes

Status Code	Meaning	Troubleshooting Step
`200 OK`	Success	Payload accepted and queued for routing.
`401 Unauthorized`	Auth Failure	Verify headers for valid `Anon / Service Role Key` credentials.
`422 Unprocessable`	Schema Error	Check field keys alignment between source and target payload.