European Parliament MCP Server API - v1.3.9
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    DataSourceStatus: "OK" | "EMPTY" | "TIMEOUT" | "UNAVAILABLE"

    Per-source data availability flag surfaced in the response envelope.

    • OK — fetch succeeded and at least one item contributed to the metric.
    • EMPTY — fetch succeeded but no items matched the subject/date filter.
    • TIMEOUT — per-source 6 s budget expired; metric reported as zero.
    • UNAVAILABLE — EP API returned an error.