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API ReferenceBillingOrganization checkouts

Create a paid organization and hosted checkout

**Authentication:** Requires a dashboard session cookie; OAuth access tokens and API keys are not accepted. Requests must pass the dashboard's same-origin and CSRF checks. Sensitive billing actions require recent authentication and a single-use billing action token; POST /billing/action-token issues that token.

POST
/billing/organization-checkouts

Authentication: Requires a dashboard session cookie; OAuth access tokens and API keys are not accepted. Requests must pass the dashboard's same-origin and CSRF checks. Sensitive billing actions require recent authentication and a single-use billing action token; POST /billing/action-token issues that token.

Authorization

sendlit.session_token<token>

Better Auth dashboard session cookie used for local HTTP connections.

In: cookie

Request Body

application/json

Body

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X POST "https://api.sendlit.app/billing/organization-checkouts" \  -H "Content-Type: application/json" \  -d '{    "plan": "starter",    "interval": "month",    "catalogRevision": 0,    "organizationName": "string",    "teamName": "string"  }'
{
  "checkoutUrl": "http://example.com",
  "expiresAt": "string",
  "organizationId": "string"
}
{
  "error": "string"
}
{
  "error": "string"
}
{
  "error": "string"
}
{
  "error": "string"
}
{
  "error": "string"
}
{
  "error": "string"
}

Read the active billing catalog GET

Returns environment-configured offers without provider product IDs. Amounts are integer minor units. **Authentication:** No authentication is required.

List contacts GET

Returns a paginated list of contacts. Pass filter as serialized ContactFilterWithAggregator JSON for inline filtering, or segmentId to only return contacts currently matching that saved segment's filter (404 if the segment doesn't exist). SendLit supports fixed generic contact filters over first-class fields, tags, and custom fields; client-specific concepts should be synced into namespaced tags or customFields. q, filter, and segmentId combine with AND. The response's total reflects the combined filters. **Authentication:** Requires a team API key or a user OAuth access token. Dashboard session cookies are also accepted.