{"nature":"This API supplies data organisation and trend description only. It is not a recommendation to act; the decision is yours. Purely descriptive - no judgement, no prediction. Every record carries an official source plus a record_hash (canonical sha256, recomputable offline for self-verification; cross-check with free /gauge/verify).","note":"Signal catalogue: query /gauge?signal_id=&entity= with a signal_id plus one of its entities. dims_available lists the add-on dimensions this signal actually has (ruler/calibrated/strata/history) - buying one that is not listed returns 422 no_charge and you are not billed. Filters: ?signal_id= / ?industry= / ?tag=primary[:secondary] (a primary tag brings back every secondary under it, for you to pick from). Paging: ?limit= (default 25, max 100) and ?offset=. Entity lists are omitted by default - fetch one signal with ?signal_id=<id> (or add ?entities=1) to get its entities[].","pagination":{"limit":25,"offset":0,"total":334,"returned":25},"signals":[{"signal_id":"agriculture.crop-condition","signal_id_label":"Agriculture.Crop condition (NASS)","industry":"agriculture","kingdom":"natural","class":"index","temporal_cycle":"weekly","unit_basis":"per-us","description":"Official USDA NASS corn crop condition, share of acreage rated Good + Excellent (percent), national and by major state, weekly during the growing season (NASS Crop Progress). The published condition ruler and the state→national reconciliation leg; distinct from the satellite VHI proxy. Descriptive only, no yield forecast; requires NASS_API_KEY.","dims_available":["ruler"],"entities_count":6,"entities_ref":"/gauge/catalog?signal_id=agriculture.crop-condition"},{"signal_id":"agriculture.crop-condition-wheat","signal_id_label":"Agriculture.Wheat crop condition (NASS)","industry":null,"kingdom":"natural","class":"index","temporal_cycle":"weekly","unit_basis":"per-us","description":"Official USDA NASS WHEAT crop condition, share of acreage rated Good + Excellent (percent), national and by wheat-belt state, weekly during the growing season (NASS Crop Progress); auto-selects the winter/spring wheat class with the most recent report per state. The drought↔wheat-condition inverse-pair leg (interweave line F-wheat / FW); distinct from corn crop condition and the satellite VHI proxy. Descriptive only, no yield forecast; requires NASS_API_KEY.","dims_available":["ruler"],"entities_count":7,"entities_ref":"/gauge/catalog?signal_id=agriculture.crop-condition-wheat"},{"signal_id":"agriculture.crop-vhi","signal_id_label":"Agriculture.Crop vigour VHI","industry":"agriculture","kingdom":"natural","class":"index","temporal_cycle":"weekly","unit_basis":"per-cropland","description":"Cropland vegetation health index VHI in major crop regions (NOAA satellite, weekly) + official VHI<40 5-level drought classification + same-week seasonal percentile; yield proxy, descriptive only, no judgement or forecast","dims_available":["ruler","strata","history"],"entities_count":11,"entities_ref":"/gauge/catalog?signal_id=agriculture.crop-vhi"},{"signal_id":"agriculture.drought","signal_id_label":"Agriculture.Drought (soil water deficit)","industry":"agriculture","kingdom":"natural","class":"stock","temporal_cycle":"daily","unit_basis":"per-soil","description":"Root-zone soil moisture in major crop regions (28-100cm, ERA5) + same-season percentile + official USDM D0-D4 drought classification; descriptive only, no judgement or forecast","dims_available":["ruler","strata","history"],"entities_count":12,"entities_ref":"/gauge/catalog?signal_id=agriculture.drought"},{"signal_id":"agriculture.drought-area","signal_id_label":"Agriculture.USDM drought area%","industry":"agriculture","kingdom":"natural","class":"index","temporal_cycle":"weekly","unit_basis":"per-us","description":"Official US Drought Monitor share of area in severe drought or worse (D2+, percent), national and by state, weekly (NDMC/UNL). The published area-share ruler and the state→national reconciliation leg (state D2+% vs national D2+%); distinct from the agriculture.drought soil-moisture proxy. Descriptive only, no forecast.","dims_available":["ruler"],"entities_count":15,"entities_ref":"/gauge/catalog?signal_id=agriculture.drought-area"},{"signal_id":"agriculture.heat","signal_id_label":"Agriculture.Heat stress / GDD","industry":"agriculture","kingdom":"natural","class":"flow","temporal_cycle":"daily","unit_basis":"per-air","description":"Daily max temperature heat stress in major crop regions (corn pollination thresholds) + season-cumulative GDD (base 10 degC) + same-season percentile; descriptive only, heat stress is risk potential not a yield-loss determination","dims_available":["ruler","calibrated","strata","history"],"entities_count":12,"entities_ref":"/gauge/catalog?signal_id=agriculture.heat"},{"signal_id":"agriculture.soil-moisture","signal_id_label":"Agriculture.Soil moisture (NASA POWER)","industry":"agriculture","kingdom":"natural","class":"stock","temporal_cycle":"daily","unit_basis":"per-soil","description":"NASA POWER GWETROOT root-zone soil wetness (0-1 relative saturation, no API key, GEOS-IT NRT ~2-3 day lag); same-season percentile stat ruler; second independent physical source, cross-checkable against agriculture.drought (ERA5 Open-Meteo); T1 descriptive only, no judgement or forecast; absolute values carry a systematic bias by soil type, seasonal percentile anomalies are more reliable","dims_available":["ruler","strata","history"],"entities_count":6,"entities_ref":"/gauge/catalog?signal_id=agriculture.soil-moisture"},{"signal_id":"agriculture.wasde-balance","signal_id_label":"Agriculture.WASDE balance (PSD)","industry":"agriculture","kingdom":"natural","class":"stock","temporal_cycle":"monthly","unit_basis":"per-us","description":"US grain supply-demand balance — ending stocks (+ production, exports) in thousand metric tons for corn / soybeans / wheat, monthly, from the USDA FAS PSD Online store (WASDE-reconciled; the WASDE report itself is PDF). National quantity ruler, distinct from state crop condition and from price. Descriptive only; requires FAS_API_KEY.","dims_available":["ruler"],"entities_count":3,"entities_ref":"/gauge/catalog?signal_id=agriculture.wasde-balance"},{"signal_id":"ai-compute.financing-distress","signal_id_label":"AI compute.Financing distress","industry":"ai-compute","kingdom":"compute-infra-derived","class":"index","temporal_cycle":"daily","unit_basis":"per-provider","description":"AI compute provider financing / GPU debt / lease distress (upstream leading); triangle second leg; derived analysis, descriptive only, no judgement or forecast","dims_available":["ruler"],"entities_count":25,"entities_ref":"/gauge/catalog?signal_id=ai-compute.financing-distress"},{"signal_id":"ai-compute.industry-timeline","signal_id_label":"AI compute.Industry cycle timeline","industry":"ai-compute","kingdom":"economic-derived","class":"index","temporal_cycle":"daily","unit_basis":"per-industry","description":"Full AI compute / neocloud industry cycle (births and deaths by year + lifespan days + by tier); timeline structure unique to emerging industries; purely statistical description","dims_available":[],"entities_count":1,"entities_ref":"/gauge/catalog?signal_id=ai-compute.industry-timeline"},{"signal_id":"ai-compute.lifecycle","signal_id_label":"AI compute.Lifecycle","industry":"ai-compute","kingdom":"compute-infra-lifecycle","class":"event","temporal_cycle":"as-events","unit_basis":"per-provider","description":"Full industry cycle of AI compute / neocloud providers (founding birth + shutdown / acquisition / bankruptcy end + lifespan days + tier). Emerging industry Block A; MAIN leg of the AI compute death triangle; official facts restated, descriptive only, no assessment, no forecast","dims_available":["ruler"],"entities_count":25,"entities_ref":"/gauge/catalog?signal_id=ai-compute.lifecycle"},{"signal_id":"ai-compute.workload-exposure","signal_id_label":"AI compute.Hosted workload exposure","industry":"ai-compute","kingdom":"compute-infra-derived","class":"index","temporal_cycle":"daily","unit_basis":"per-provider","description":"AI compute death -> exposure of ai-tools / ai-deps / promises hosted on it (downstream cross-validation + outermost cascade) + corporate death corroboration; triangle third leg; descriptive only, no judgement","dims_available":["ruler"],"entities_count":25,"entities_ref":"/gauge/catalog?signal_id=ai-compute.workload-exposure"},{"signal_id":"ai-dataset.industry-timeline","signal_id_label":"AI dataset.Industry cycle timeline","industry":"ai-dataset","kingdom":"economic-derived","class":"index","temporal_cycle":"daily","unit_basis":"per-industry","description":"Full AI training dataset industry cycle (births and deaths by year + lifespan days + by takedown reason + by modality); timeline structure unique to emerging industries; purely statistical description","dims_available":[],"entities_count":1,"entities_ref":"/gauge/catalog?signal_id=ai-dataset.industry-timeline"},{"signal_id":"ai-dataset.legal-distress","signal_id_label":"AI dataset.Legal pressure","industry":"ai-dataset","kingdom":"training-data-derived","class":"index","temporal_cycle":"daily","unit_basis":"per-dataset","description":"AI dataset legal and ethics pressure escalation (DMCA / litigation / regulator / ethics; upstream leading, leads takedown by weeks to months); triangle second leg; derived analysis, descriptive only, no judgement, not legal advice","dims_available":["ruler"],"entities_count":24,"entities_ref":"/gauge/catalog?signal_id=ai-dataset.legal-distress"},{"signal_id":"ai-dataset.lifecycle","signal_id_label":"AI dataset.Lifecycle","industry":"ai-dataset","kingdom":"training-data-lifecycle","class":"event","temporal_cycle":"as-events","unit_basis":"per-dataset","description":"Full industry cycle of AI training datasets (release birth + takedown / deletion / retraction end + lifespan days + modality/host/death_type). Emerging industry Block A; MAIN leg of the AI dataset death triangle; a deleted dataset is by definition not reconstructible; public and legal facts restated, descriptive only, no assessment, no legal advice","dims_available":["ruler"],"entities_count":24,"entities_ref":"/gauge/catalog?signal_id=ai-dataset.lifecycle"},{"signal_id":"ai-dataset.model-lineage-exposure","signal_id_label":"AI dataset.Model lineage exposure","industry":"ai-dataset","kingdom":"training-data-derived","class":"index","temporal_cycle":"daily","unit_basis":"per-dataset","description":"AI dataset death -> exposure of models / tools / promises trained on it (downstream cross-validation + outermost cascade into ai-deps / ai-tools / promises) + removal-corroboration gate; downstream core of the triangle third leg; descriptive only, no judgement, not legal advice","dims_available":["ruler"],"entities_count":24,"entities_ref":"/gauge/catalog?signal_id=ai-dataset.model-lineage-exposure"},{"signal_id":"ai-dependency.cascade","signal_id_label":"AI dependency.Cascade","industry":"ai-dependency","kingdom":"artificial-derived","class":"index","temporal_cycle":"daily","unit_basis":"per-dependency","description":"Model or API deprecation -> exposure of dependent AI tools (D->B cross-validation); downstream triangle third leg; descriptive only, states dependency facts, no forecast","dims_available":["ruler"],"entities_count":27,"entities_ref":"/gauge/catalog?signal_id=ai-dependency.cascade"},{"signal_id":"ai-dependency.deprecation-notices","signal_id_label":"AI dependency.Deprecation notice","industry":"ai-dependency","kingdom":"artificial","class":"event","temporal_cycle":"daily","unit_basis":"per-dependency","description":"Count and list of official deprecation notices (deprecation announcement / scheduled sunset date / migration guide / shutdown notice); upstream leading indicator on the AI dependency triangle second chain (deprecations are always pre-announced); descriptive only, no judgement","dims_available":["ruler"],"entities_count":21,"entities_ref":"/gauge/catalog?signal_id=ai-dependency.deprecation-notices"},{"signal_id":"ai-dependency.industry-timeline","signal_id_label":"AI dependency.Industry cycle timeline","industry":"ai-dependency","kingdom":"regulatory-derived","class":"index","temporal_cycle":"daily","unit_basis":"per-industry","description":"Full AI dependency industry cycle timeline (births and deaths by year + lifespan day statistics + longest running / shortest lived); models die fast, so median lifespan days runs markedly short; timeline structure unique to emerging industries; purely statistical description","dims_available":[],"entities_count":1,"entities_ref":"/gauge/catalog?signal_id=ai-dependency.industry-timeline"},{"signal_id":"ai-dependency.lifecycle","signal_id_label":"AI dependency.Lifecycle","industry":"ai-dependency","kingdom":"regulatory-lifecycle","class":"event","temporal_cycle":"as-events","unit_basis":"per-policy","description":"Full industry cycle of AI model/API/SDK dependencies (birth + deprecation / removal end + lifespan_days + death_type; official deprecation records). Emerging industry Block A; MAIN leg of the AI dependency causal triangle and mirror of the climate policy line; descriptive only, no assessment, no forecast","dims_available":["ruler"],"entities_count":27,"entities_ref":"/gauge/catalog?signal_id=ai-dependency.lifecycle"},{"signal_id":"airquality.aqi","signal_id_label":"Air quality.US AQI","industry":"airquality","kingdom":"natural","class":"index","temporal_cycle":"daily","unit_basis":"per-air","description":"US EPA Air Quality Index (AQI) for US cities; Copernicus CAMS model, readings relayed as-is, no judgement or forecast","dims_available":["ruler","calibrated","strata","history"],"entities_count":12,"entities_ref":"/gauge/catalog?signal_id=airquality.aqi"},{"signal_id":"airquality.pm25","signal_id_label":"Air quality.PM2.5","industry":"airquality","kingdom":"natural","class":"concentration","temporal_cycle":"daily","unit_basis":"per-air","description":"PM2.5 concentration for US cities (ug/m3); Copernicus CAMS model, readings relayed as-is","dims_available":["ruler","calibrated","strata","history"],"entities_count":12,"entities_ref":"/gauge/catalog?signal_id=airquality.pm25"},{"signal_id":"ai-tool.distress","signal_id_label":"AI tool.Decline warning","industry":"ai-tool","kingdom":"artificial","class":"event","temporal_cycle":"daily","unit_basis":"per-tool","description":"AI tool / MCP decline signals (page gone / pricing hike / GitHub archived / consecutive absence); upstream leading on the triangle second chain; descriptive only, no judgement","dims_available":["ruler"],"entities_count":21,"entities_ref":"/gauge/catalog?signal_id=ai-tool.distress"},{"signal_id":"ai-tool.industry-timeline","signal_id_label":"AI tool.Industry cycle timeline","industry":"ai-tool","kingdom":"artificial","class":"index","temporal_cycle":"daily","unit_basis":"per-industry","description":"Full AI tool / MCP industry cycle (births and deaths by year + lifespan day statistics); timeline structure unique to emerging industries; purely statistical description","dims_available":[],"entities_count":1,"entities_ref":"/gauge/catalog?signal_id=ai-tool.industry-timeline"},{"signal_id":"ai-tool.lifecycle","signal_id_label":"AI tool.Liveness and lifecycle","industry":"ai-tool","kingdom":"ai-tool-lifecycle","class":"event","temporal_cycle":"as-events","unit_basis":"per-tool","description":"Full industry cycle of AI tools and MCP servers (birth + shutdown / archival end + lifespan_days + death_type; web-tool liveness=DNS/HTTP, mcp-server liveness=GitHub archived/last-push). Emerging industry Block A + alive oracle; descriptive only, no assessment, no forecast","dims_available":["ruler"],"entities_count":27,"entities_ref":"/gauge/catalog?signal_id=ai-tool.lifecycle"}]}