INDEPENDENT DEVELOPER REFERENCE
Does the API support webhooks?
Yes, for Pick6 changes on the $149 Production plan. Callbacks are signed with HMAC-SHA256 and delivered at least once, so verify the signature and deduplicate the event ID. Sportsbook and DFS rows have no webhooks. Manage receivers from the signed-in dashboard.
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What a receiver must do
Verify x-dk-signature, formatted t=timestamp,v1=hex, as an HMAC of the timestamp, a dot and the exact raw body. Deduplicate x-dk-event-id. Respond quickly, and do not redirect, since redirects count as failures. A 403 from your receiver disables that hook, and a 429 sets a bounded cooldown. An account can have five active hooks.
Scope
Pick6 changes: Developer and Production include the resumable stream, and Production also includes signed webhooks. Native sportsbook scopes: paid plans can use a server-side WebSocket at /api/v1/sportsbook/ws. ESPN-attributed sportsbook rows and DFS rows have no push delivery.
Check the recorded data
Related resources
Signed Pick6 change webhooks on Production and a resumable stream on Developer: signature checks, retries, replay and limits.
Which plans include the Pick6 change stream?Developer and Production on the monthly contract. Each connection lasts up to 55 seconds, costs one request and resumes from a saved ID.
Track DraftKings line movement with the APIFollow recorded Pick6 changes with a resumable cursor, read sportsbook history by sequence, and compute moves without overclaiming.
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