# Validate fulfil credentials

> POST /connections/fulfil/validate

Source: https://docs.trykintsugi.com/reference/2026-07-21/validate-fulfil-credentials

API version: Tenanted API release 2026-07-21

POST /connections/fulfil/validate

Validate fulfil credentials

Probe a Fulfil merchant and personal access token without saving a connection. Returns the normalized merchant subdomain when company.company can be read. Returns 400 if the merchant or token is rejected, and 503 if Fulfil cannot be reached.

Category: Connections

Request body:
merchant (string, required) - Fulfil merchant subdomain, or a fulfil.io host.
apiKey (string, required) - Fulfil personal access token.

Response fields:
merchant (string, required) - Normalized Fulfil merchant subdomain that accepted the token.

Response statuses: 200, 400, 401, 403, 404, 422, 503

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