Versioning

Both MCP servers report their version in serverInfo.version and on their server cards. The public API is under /api/v1.

What can change without notice

• New tools, prompts, resources, and API routes
• New optional inputs
• New fields in results and API responses
• New error codes for new situations

Write clients that ignore fields they don't know.

What needs 30 days' notice

• Removing or renaming a tool, resource, route, input, or result field
• Making an optional input required
• Changing what an existing field or error code means

Anything scheduled for removal is listed under deprecations on the server card with its replacement and the earliest removal date, and the tool description starts with "Deprecated here". It keeps working for at least 30 days after it is first listed.

Recent additions

Developer and player servers 1.14:

• New developer tools: get_store_links and set_store_links for the listing's pages on other stores such as Steam, GOG, or Epic Games Store (4238 for a link on the wrong site). get_game_details returns them as store_links
• search_catalog: several values in one filter match any of them (comma-separate asset_type, session_bucket, net, os, and authorship), and exclude_types, exclude_genres, exclude_tone, exclude_tags, and exclude_ai_uses leave listings out. sort defaults to best match
• os on search_catalog and get_shelf accepts ios

Developer and player servers 1.13:

• New tools: set_timezone (sets the human's IANA timezone; 4085 for an unknown name) and get_security_status (authenticator on, skipped, or not chosen, and recovery codes left)
• get_account returns legal_acceptance_required, legal_changes, setup_required, authenticator, and gate. Agents send the human to the website to finish those steps (see Account security)
• set_media returns a structured limits object for the slot it was asked about (thumbnail, cover, or screenshots with max_images)
• Signing in to approve an agent uses its own __Host-BG_MCP cookie on mcp.blazium.games, signed by the MCP server

Developer server 1.12:

• Tools, mods and plugins: asset_type gains tool and plugin; create_game and update_game accept parent, adult and indexable, and update_game accepts asset_type
• update_game_taxonomy accepts ai_uses
• New tools: set_mod_settings, get_press_kit, set_press_kit, and hide_community_tag
• Signing in and creating developer, project or deploy keys need developer mode on the account (4105)

Player server 1.12: suggest_tag, list_game_addons, and exclude_warnings and ai_uses on search_catalog. Adult listings stay out of search and recommendations unless the player opted in.

Developer server 1.11:

• Editions: list_skus, upsert_sku, and delete_sku. set_game_price returns 4164 while a listing has editions
• Builds: get_build_health, list_build_symbols, delete_build_symbols, upload_symbols_info, bundle_check, and mod_compat
• update_game_taxonomy accepts authorship and authorship_credit
• set_media returns the chauffeur media commands to upload local files (it no longer accepts url)

Player server: get_shelf, sku on quote_purchase and purchase_game, and authorship on search_catalog.

Current deprecations

Server	What	Replacement	Removed after
Developer (/mcp)	Wallet, top-up, purchase, donation, agent policy, library, and download tools, plus the wallet and library resources	The same tools on the player server; list_library becomes get_library	2026-10-28