gauge
air
no-data-no-charge
official-source
record-hash

Add-on, air quality for one location

Add-on, air quality for one location: US AQI category and PM2.5 reading from EPA and CAMS official feeds. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. Every record carries an offline-recomputable record_hash. Also searched as: air quality index; pm2.5 level; city pollution reading; health exposure air.

get/gauge/air

Request

  • Base URL: https://api.truthbear.co
  • URL: https://api.truthbear.co/gauge/air
  • Auth: none declared

Query parameters

loc'us-stlouis' | 'us-memphis' | 'us-losangeles' | 'us-fresno' | 'us-phoenix' | 'us-denver' | 'us-saltlakecity' | 'us-houston' | 'us-newyork' | 'us-chicago' | 'us-seattle' | 'us-portland' required

required - location id; full list at free /gauge/preview

Response

Paid response

naturestring required

Neutrality statement: GAUGE supplies observations and trend description only - no judgement, no prediction, no recommendation

addon'air' | 'precip'

Conditional - returned only by the /gauge/air and /gauge/precip sub-endpoints: the add-on line marker

locationstring

The location key of this bundle - the ?loc= you passed in

namestring nullable

Human-readable name of the object

linestring

The line this bundle belongs to (e.g. airquality)

provenanceobject nullable

Data lineage: {served_from, data_as_of, oldest_leg_as_of, data_age_hours (frozen age, reference only), age_hours_now (age computed at request time - the real basis for freshness), freshness(fresh|recent|stale), freshness_basis (the cadence and threshold used for this row, as a string), dead_source (optional: upstream frozen or discontinued), data_lineage:[{signal,traceable_to,uncertainty,record_hash,...}], validation_status}. Freshness is cadence-aware, so monthly/quarterly/annual official lines are not misjudged against a 24h rule; the same basis is used by free /gauge/coverage. Buyers can trace back to the official source

decision_pointsobject nullable

{count, points:[{tag,current,swappable,how}], note} - decision points you can re-run with a swapped tag (one swapped tag = one call); leave it alone and the original context is the default, at no extra charge

notestring

Conditional - endpoint-specific honest disclosure (limits, granularity, disclaimer); some endpoints omit it

gradestring nullable

Honest data-grade disclosure (e.g. "screening-level, not decision-grade")

scopestring nullable

Honest statement of scope and limits: monitoring is not forecasting, intelligence is not instruction, and the boundary of what is verifiable

_citationobject nullable

Offline-verifiable citation: {statement_type, not_advice:bool, claim, fact, source, record_hash, signature(Ed25519), key_id, issuer_DID(did:key), verify_url} - the trust root for zero-trust self-verification

Changes

No recorded changes to this operation across all 1 revision of this API.