https://forum.developer.betfair.com/ vBulletin Forums en Tue, 08 Sep 2026 04:01:47 GMT vBulletin 60 https://forum.developer.betfair.com/images/misc/rss.png https://forum.developer.betfair.com/ https://forum.developer.betfair.com/forum/developer-program/software-vendor-program/42985-live-pricing-esa Thu, 03 Sep 2026 19:23:33 GMT I am currently developing a multi-tenant commercial web application for Betfair customers. Our backend architecture is designed to minimise server... I am currently developing a multi-tenant commercial web application for Betfair customers.
Our backend architecture is designed to minimise server infrastructure overhead and betfair server usage. I am configuring our systems to use my Delayed App Key for development and connection testing, with the architecture built to swap to our Live Vendor Key once certified.
Before i finalise our live data layer, i want to ensure our data distribution model is fully compliant with the Betfair Vendor Program guidelines.
my Proposed Architecture (mental model):

1. Market Metadata: my backend uses our Vendor credentials to pull listMarketCatalogue and cache event frameworks in MongoDB/Redis.
2. Live Pricing (ESA): To avoid opening hundreds of separate TCP/WebSocket connections for every individual web customer (which would exhaust server resources and flood Betfair with redundant connection requests), we intend to use a centralized caching model.
3. Data Flow: Our backend will open a minimal pool of Master Stream connections to the Betfair Exchange Stream API (ESA), authenticate the subscription via an active, logged-in customer's session token (ssoid), and stream the price deltas into a central Redis cache. Our web app will then broadcast those updates to our active users internally via lightweight WebSockets.

my Questions:

1. Does Betfair permit this "Token-Pinned Master Stream" model where a shared backend stream is authenticated via an active user's ssoid to populate a localized cache for active users?
2. If this is acceptable, does your team have a preferred best practice for seamlessly handling authentication handovers on an active stream when a user session expires?
3. If this model violates data redistribution clauses, what is Betfair's recommended architectural pattern for scalable, multi-tenant web applications to consume the Stream API without triggering connection limits?

i want to ensure my platform is completely aligned with your commercial requirements from day one. Thank you for your time and guidance.]]> Software Vendor Program kimpolley https://forum.developer.betfair.com/forum/developer-program/software-vendor-program/42985-live-pricing-esa https://forum.developer.betfair.com/forum/developer-program/general-betting/42982-posting-real-bets-with-delayed-app-key Fri, 28 Aug 2026 20:45:40 GMT Fejl24 blah blah blah Fejl24 blah blah blah General Betting AndersSkovsborg https://forum.developer.betfair.com/forum/developer-program/general-betting/42982-posting-real-bets-with-delayed-app-key https://forum.developer.betfair.com/forum/developer-program/historical-data/42979-best_avail_back_sched_off-best_avail_lay_sched_off-diescrepency Fri, 28 Aug 2026 04:21:30 GMT I have downloaded the AU+NZ historical files and find there are over 800 records with the lay price less than the back price. Has anyone else come...
Thank you]]> Historical Data billborric https://forum.developer.betfair.com/forum/developer-program/historical-data/42979-best_avail_back_sched_off-best_avail_lay_sched_off-diescrepency https://forum.developer.betfair.com/forum/sports-exchange-api/exchange-api/42967-does-the-delayed-key-preserve-timeframe Tue, 25 Aug 2026 09:29:48 GMT Hello, I have two questions. - Does the DELAYED API key preserve the timeframe of events, i.e. are they sent to the stream in chronological order?...
- Does the DELAYED API key preserve the timeframe of events, i.e. are they sent to the stream in chronological order?

- Does the '.publish_time' return the time that the delayed key sent the data, or does it return the actual live time that the delayed key received the data (to later store for a few minutes before sending over).

Thank you!

EDIT: Another question, assuming it is in order, are there any updates missed in the time it takes to send? For example, live data of A -> B -> C, the delayed key won't send me A -> C right? What if A - > B occurs in the first 'batch', will there then be B -> C in the later batch (a few minutes later), or will it skip to say G -> H?]]> Exchange API forestBETTING https://forum.developer.betfair.com/forum/sports-exchange-api/exchange-api/42967-does-the-delayed-key-preserve-timeframe https://forum.developer.betfair.com/forum/developer-program/historical-data/42949-new-field-betdelaymodels-added-to-historical-data-files-from-17th-august-2026 Thu, 20 Aug 2026 09:29:12 GMT The new field betDelayModels will be available in the Betfair Historical Data service market files after the date 17/08/26 Please note that... The new field betDelayModels will be available in the Betfair Historical Data service market files after the date 17/08/26

Please note that following field will be available on all messages where publish time is greater than or equal to 17/08/26 10:00 BST

Also note that files for markets that span across the point 17/08/26, 10:00 BST will contain market definition messages without this new field up until 17th of August 2026 10:00 BST and with the new field after17th of August 2026 10:00 BST

• "betDelayModels": [] or absence of this field, indicates - Only traditional model of bet delay enabled
• "betDelayModels": [PASSIVE] - Passive Delay enabled for the market
• "betDelayModels": [DYNAMIC] - Dynamic Delay enabled for the market
• "betDelayModels": [PASSIVE,DYNAMIC] - Both Passive and Dynamic delays enabled for the market

Please see the latest Betfair Historical Data feed specification document attached.

Kind Regards

Betfair Developer Program]]> Historical Data Betfair Developer Program https://forum.developer.betfair.com/forum/developer-program/historical-data/42949-new-field-betdelaymodels-added-to-historical-data-files-from-17th-august-2026