One successful search page or item lookup consumes one request. Cache hits and empty successful results also consume one. Failed requests and successful idempotent replays consume zero. Bulk searches charge each successful keyword; jobs charge each successful page.
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GET /usage for your workspace allowance. Account usage and request-history endpoints do not consume monthly requests. MCP discovery does not consume data units.
The X-SoldFetch-Usage-Units response header records usage for REST data responses. Quota is shared by API keys and interfaces in the same workspace.