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POST
/
leads
/
{leadId}
/
variables
Add Custom Variables on Leads
curl --request POST \
  --url https://api.lemlist.com/api/leads/{leadId}/variables \
  --header 'Authorization: Basic <encoded-value>'
{
  "ok": true
}

Documentation Index

Fetch the complete documentation index at: https://developer.lemlist.com/llms.txt

Use this file to discover all available pages before exploring further.

To add custom fields, you can add as many as you want in the body of your request with the desired value for these new fields.
The purpose of this endpoint is first and foremost to create new variables, even though we have to give them specific values on a specific lead. That’s why you’ll get errors if you give variable names that already exist on a lead.By default, lemlist includes several variables related to leads: email, firstName, lastName, picture, phone, linkedinUrl, companyName, companyDomain, and icebreaker.Beware, you cannot add a new variable with the same name as an existing variable (default or custom).

Authorizations

​
Authorization
string
header
required

Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.

Path Parameters

​
leadId
string
required

The unique identifier of the lead

Query Parameters

​
customField1
string

Example custom variable

​
customField2
string

Example custom variable

​
customField3
string

Example custom variable

Response

Success

The response is of type object.