Customer.io Connector

Customer.io is a platform designed for targeted messaging based on user behavior.

Start for free View documentation

4.8 on G2

Weld · Data Sources

Customer.ioYour warehouseLive

Pick the tables to sync, and they appear here with their status.

Lands in

Queryable over MCP

How it works

Set up in minutes.
No code, no maintenance.

Warehouse

Destination

Host

account.warehouse.com

Database

analytics_db

Reverse ETL

Warehouse data,
back in Customer.io.

Customer.io is a platform designed for targeted messaging based on user behavior. Weld's Customer.io reverse ETL connector pushes enriched and transformed data from your warehouse directly into Customer.io. Sync computed segments, lead scores and other insights on a schedule you control, with no manual exports or custom scripts.

Resources

Everything you need.
To get started.

Documentation

Customer.io setup guide

Step-by-step instructions to configure and start syncing.

MCP server

Connect your agents

Set up Claude, Cursor, ChatGPT or Codex against your Weld workspace.

Weld Connect API

Build custom connectors

Use the Weld Connect API to build and publish your own connector.

FAQ

Common questions

Answers to frequently asked questions about Weld connectors.

Weld Connect API

Set it up in code.
One REST API.

Use the Weld Connect REST API to create Customer.io connections, configure ELT syncs, and manage pipelines entirely through code. Built for embedding, automation, and CI/CD workflows.

Explore Weld Connect API reference

POST/elt_syncs

# Create a Customer.io ELT sync
curl -X POST https://connect.weld.app/elt_syncs \
  -H "x-api-key: $API_KEY" \
  -d '{
    "connection_id": "conn_abc123",
    "integration_id": "customer-io",
    "destination_schema_name": "customer-io_data",
    "sync_interval": "0 * * * *"
  }'
▌