| as_of | No | Pricing as-of timestamp | |
| gated | No | true when parts of the payload were withheld by tier | |
| quota | No | Caller quota state (remaining calls, tier) when available. | |
| scope | No | What the figures cover (e.g. the ISO/state scope line) | |
| filter | No | Echo of the applied filters | |
| _entity | No | Payload class discriminator (e.g. facility|market|iso_grid|queue_results|deal|report|response) — branch on this before parsing the rest. | |
| success | No | true when the pricing lookup succeeded | |
| citation | No | Machine-readable citation: how to attribute DC Hub (dchub.cloud) for this payload. Normally an OBJECT {source, url, license, cite_as, retrieved_at}; a bare string is accepted and carries the attribution line itself. | |
| provenance | No | Collection-level provenance block: {source, method, as_of, verification_counts, cite_url_template, license, cite_as}. Quote the verification level when citing. | |
| _front_door | No | In-band front-door hint (first workflow-entry tool of a session): call plan_query(intent) first for the ordered multi-step plan. | |
| caller_tier | No | Tier the response was served at | |
| grid_status | No | Real-time grid status flag (when served) | |
| _return_loop | No | Suggested next-session delta call (get_changes since=24h) so you pull only what changed. | |
| avg_rate_kwh | No | Average rate, cents/kWh | |
| retail_rates | No | Retail-rate aggregate block | |
| retail_rate_kwh | No | Retail electricity rate, cents/kWh | |
| industrial_rate_kwh | No | Industrial electricity rate, cents/kWh | |
| natural_gas_usd_mmbtu | No | Henry Hub-referenced natural gas price, USD/MMBtu (when served) | |
| site_evaluation_handoff | No | Pre-built follow-up calls (analyze_site / get_water_risk args) when the payload carries coordinates — an array of {tool, parameters, why} entries. | |
| wholesale_price_usd_mwh | No | Wholesale / LMP context, USD/MWh (when served) | |