How to get match data from Matchmaker Cloud Code allocator

What runtime values are available from IExecutionContext?

IExecutionContext context is passed to both Allocate and Poll and gives you:

• context.ProjectId — Unity project ID. Required when constructing URLs for Unity REST APIs that include the project ID in their path.
• context.EnvironmentId — active environment (production, development, etc.). Use this to route to different provider fleets or queues without hardcoding per-environment config.
• context.ServiceToken — short-lived bearer token for authenticating calls to Unity's REST APIs. Pass as Authorization: Bearer {token} when calling Unity services directly.

What match-level values are available directly on MatchmakingResults?

These are top-level properties on MatchmakingResults, not entries inside MatchProperties:

• MatchId — unique ID for this match. Use it as a session or placement ID with your provider for idempotency.
• PoolId / PoolName — which pool triggered this allocation. Useful for routing to different fleets per pool.
• QueueName — the queue the ticket was submitted to.
• EnvironmentId — environment the match was created in. Matches context.EnvironmentId and is useful when the payload is forwarded to the game server.
• BackfillTicketId — set on backfill allocations, null otherwise.

Player list, region, max players, and other match-shape data live on MatchmakingResults.MatchProperties (see the previous question).

var env         = context.EnvironmentId;
var regionValue = request.MatchmakingResults.MatchProperties.GetValueOrDefault("Region")?.ToString();
var region      = string.IsNullOrEmpty(regionValue) ? DefaultRegion : regionValue;

// MatchId doubles as a stable placement ID — useful for idempotent provider calls
var placementId = request.MatchmakingResults.MatchId;

logger.LogInformation("env={Env} pool={Pool} region={Region} match={MatchId}",
    env, request.MatchmakingResults.PoolName, region, placementId);