Fourth to PostgreSQL integration

Connect Fourth to PostgreSQL and automatically sync your finance & accounting data.

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Fourth

Data source

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CONNECTOR SOURCE

Fourth to PostgreSQL

Connect Fourth to PostgreSQL and automatically sync your finance & accounting data. Weld extracts Invoices, Payments, Accounts, and Transactions from Fourth, loads them into PostgreSQL, and lets you transform the data using SQL or dbt, no custom scripts required.

Fourth data schema

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10tables

199fields

1relationships

location_canonical_id

contractor_shift_expense

department_foreign_id

employee_payroll_period

department_foreign_id

employee_personnel_number

department_foreign_id

employee_personnel_number

department_foreign_id

system_forecast_items

department_foreign_id

system_forecast_items

department_foreign_id

department_foreign_id

string

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Everything you need to get started

Fourth

Setup guide Data schema10 tables Connector page

PostgreSQL

Setup guide Connector page

Weld Connect API

Set up programmatically

Use the Weld Connect REST API to create Fourth 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 Fourth ELT sync
curl -X POST https://connect.weld.app/elt_syncs \
  -H "x-api-key: $API_KEY" \
  -d '{
    "connection_id": "conn_abc123",
    "integration_id": "fourth",
    "destination_schema_name": "fourth_data",
    "sync_interval": "0 * * * *"
  }'
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FAQs

How do I sync Fourth data to PostgreSQL?

Sign up for Weld, connect Fourth as a source and PostgreSQL as a destination. Weld handles the extraction, loading, and lets you transform data using SQL or dbt.

What Fourth data can I sync to PostgreSQL?

You can sync Invoices, Payments, Accounts, Transactions, and Customers. The available objects depend on your Fourth account permissions and configuration.

How often does Weld sync data from Fourth?

Sync frequency depends on your Weld plan. Schedules range from every 5 minutes to daily intervals. Each sync processes only new and changed data.

Can I transform Fourth data before it lands in PostgreSQL?

Yes. Weld supports SQL-based transformations in the platform and integrates with dbt Cloud. You can clean, join, and model your data before analysis.

Is the Fourth to PostgreSQL integration secure?

Yes. Weld encrypts all data in transit and at rest, is SOC 2 Type II certified, and supports IP whitelisting. Credentials are stored encrypted and never logged.