> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://apidocs.polytomic.com/2023-04-25/code-examples/model-sync-reverse-etl-from-mongo-db-to-salesforce/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://apidocs.polytomic.com/_mcp/server.

Before getting started make sure to set your Polytomic API key as an environment variable:

```bash
export POLYTOMIC_API_KEY=YOUR-API-TOKEN
```

This example tutorial will cover four steps:

1. Connecting to MongoDB.
2. Connecting to Salesforce.
3. Creating a data model using the MongoDB database.
4. Loading data from MongoDB into Salesforce.

## 1. Create a MongoDB connection

The following request will create a MongoDB connection. The configuration for each type of connection can be found at the [connection configuration](https://apidocs.polytomic.com/2023-04-25/configuring-your-connections) page.

```bash
curl --request POST  \
     --url https://app.polytomic.com/api/connections \
     --header "accept: application/json"  \
     --header "content-type: application/json"  \
     --header "X-Polytomic-Version: 2023-04-25"   \
     --header "Authorization: Bearer ${POLYTOMIC_API_KEY}"  \
     -d '{"name": "MongoDB Connection",
					"type": "mongodb", 
          "configuration": {
            	"hosts": "example.mongodb.net",
              "username": "user",
              "password": "secret"
          }
				}'
```

## 2. Create an Salesforce connection

The following request will create a Salesforce connection. The configuration for each type of connection can be found at the [connection configuration](https://apidocs.polytomic.com/2023-04-25/configuring-your-connections) page.

```bash
curl --request POST  \
     --url https://app.polytomic.com/api/connections \
     --header "accept: application/json"  \
     --header "content-type: application/json"  \
     --header "X-Polytomic-Version: 2023-04-25"   \
     --header "Authorization: Bearer ${POLYTOMIC_API_KEY}"  \
     -d '{"name": "Salesforce Connection","type": "salesforce", "configuration": {"domain": "https://example.my.salesforce.com"}}
```

Since Salesforce connections uses OAuth to authenticate, we'll need to follow the link returned in the `auth_url` parameter in the response.

#### Redirection

\


> **Note**
>
> By default, the API expects the `auth_url` to be opened in a new browser window. If you'd like to modify the redirect behavior, there is an optional `redirect_url` parameter that can be added to the request body.

## 3. Create a MongoDB data model

```bash
curl --request POST  \
     --url https://app.polytomic.com/api/models \
     --header "accept: application/json"  \
     --header "content-type: application/json"  \
     --header "X-Polytomic-Version: 2023-04-25"  \
     --header "Authorization: Bearer ${POLYTOMIC_API_KEY}"  \
     -d '{
           "name": "MongoDB Model",
            "configuration": {
               "database": "example",
               "collection": "users"
        },
     "connection_id": "YOUR-MONGODB-CONNECTION-ID"
     }'
```

#### Enumerating model sources

\


> **Note**
>
> For information about how to enumerate sources see the Quickstart [Create a model](https://apidocs.polytomic.com/2023-04-25/quickstart#2--create-a-model) section.

\


## 4. Create a sync from MongoDB into Salesforce using the data model

This sync maps the email field in the data model to the email field of Salesforce Contacts. It additionally maps the `FirstName` and `LastName` fields. The field mappings can be extended to syncs additional fields.

#### Enumerating targets

\


> **Note**
>
> For information about how to enumerate targets, see our [Create a sync](https://apidocs.polytomic.com/2023-04-25/quickstart#3--create-a-sync) section.

\


```bash
curl --request POST  \
     --url https://app.polytomic.com/api/syncs \
     --header "accept: application/json"  \
     --header "content-type: application/json"  \
     --header "X-Polytomic-Version: 2023-04-25"  \
     --header "Authorization: Bearer ${POLYTOMIC_API_KEY}"  \
     -d '{
          "name": "Mongo to Salesforce Sync",
          "mode": "create",
          "identity": {
               "source": {
                    "field": "email",
                    "model_id": "YOUR-MODEL-ID"
               },
               "target": "Email",
               "function": "equality"
           },
          "fields": [
               {
                    "source": {
                         "field": "first_name",
                         "model_id": "YOUR-MODEL-ID"
                    },
                    "target": "FirstName"
               },
               {
                    "source": {
                         "field": "last_name",
                         "model_id": "YOUR-MODEL-ID"
                    },
                    "target": "LastName"
               }
          ],
          "schedule": {
               "frequency": "manual"
          },
          "target": {
               "connection_id": "YOUR-SALESFORCE-CONNECTION-ID",
               "object": "Contact"
          }
     }'
```