HALOWERK naturwerk

Endpoints (25 live)

• POST /v1/river-gauge — Returns the latest instantaneous values at a USGS streamgage, together with what makes them readable. A stage of three point four feet means nothing on its own, so each value is placed against the station own record for the requested reference period: the minimum, median and maximum, and the percentile the current reading falls at. The reference period is stated with the comparison, because a percentile without a window is not a statistic. (0.004 USDC on Base)
• POST /v1/earthquake-brief — Returns a single earthquake in decision-ready form, either by its USGS event identifier or as the most significant event matching a search. Magnitude is reported with the magnitude type, because moment magnitude and local magnitude are not interchangeable at the edges of their ranges. (0.004 USDC on Base)
• POST /v1/biodiversity-density — Assesses the recorded biodiversity of an area around a point: how many distinct species appear, how many records support them, how recent those records are, how many separate datasets contributed, and the breakdown by kingdom. The trap this service is built around is that record density measures observers, not organisms — a city park with heavy footfall carries more records than a roadless reserve and is not thereby richer. (0.006 USDC on Base)
• POST /v1/climate-normals — Returns the German Weather Service reference-period values for the station nearest a coordinate: monthly means and annual totals for air temperature, precipitation and sunshine duration, plus the mean annual counts of frost days, ice days, summer days and hot days. (0.005 USDC on Base)
• POST /v1/water-quality — Retrieves water quality results for a monitoring site from the Water Quality Portal and normalises them into a comparable shape. The real work is units: the same measurement appears there as mg/L, ug/L, ppm and mg/l in mixed case, and combining them unchecked puts factor-of-thousand errors into any statistic built on top. (0.005 USDC on Base)
• POST /v1/noise-level — Queries the Sensor.Community live area feed, keeps the newest noise reading per outdoor sensor within the requested radius, and returns nearest readings plus median, p10 and p90 LAeq. It never converts missing sensors into an estimated dB value. Community sensors are indicative rather than calibrated regulatory measurements; no day/night legal limit or property valuation is inferred. (0.006 USDC on Base)
• POST /v1/sat-diff — Fetches two 128×128 NASA GIBS Harmonized Landsat Sentinel-2 reflectance renderings for a coordinate window, decodes the PNGs locally and compares only pixels present in both dates. It reports measured RGB change plus transparent colour-class heuristics for built-up, water/flooding and vegetation loss. HLS resolution is about 30 m; cloud, season, lighting and acquisition gaps can dominate differences. (0.015 USDC on Base)
• POST /v1/leak-indicator — Takes one or more district metered areas, each with a flow series and optionally a pressure series, a metered consumption figure and a service connection count, and returns three independent leak indicators per area plus a ranking across all of them. The first is minimum night flow: the lowest flow inside the night window is taken for every night in the record, the median of those nightly minima is reported, and where a connection count is given the legitimate night consumption is subtracted so… (0.005 USDC on Base)
• POST /v1/seismic-proximity — Retrieves the earthquakes within a radius and time window of a point and turns them into an exposure figure. Each event contributes according to its magnitude and its distance, using an explicit formula that is returned with the result: energy scales exponentially with magnitude and attenuates with distance, so a distant large event and a near small one can contribute comparably, which is the behaviour that makes a single count useless. (0.005 USDC on Base)
• POST /v1/gnss-degradation — Estimates how likely satellite navigation is to be degraded, keeping two distinct mechanisms apart. Ionospheric delay error rises with geomagnetic activity, affects single-frequency receivers far more than dual-frequency ones, and shifts the computed position without any obvious sign that something is wrong. (0.004 USDC on Base)
• POST /v1/irrigation-need — Computes reference evapotranspiration by the FAO-56 Penman-Monteith method from hourly forecast data, applies a crop coefficient, subtracts effective rainfall and returns the resulting daily water deficit and its running total. The method is named because it matters: a simple temperature-based estimate and Penman-Monteith diverge substantially in windy or dry conditions, and a number without its method cannot be compared with anything. (0.005 USDC on Base)
• POST /v1/quake-sequence — Clusters earthquakes that are close in space and time into sequences, using a single-link approach with an explicit distance and time threshold that both appear in the result. For each sequence you get the strongest event, the events that preceded it and those that followed, the duration, the spatial extent, the magnitude range and the rate of events per day. The naming is deliberate: the fields are before_strongest and after_strongest, not foreshocks and aftershocks. (0.005 USDC on Base)
• POST /v1/frost-window — Turns an hourly forecast into the thing that is actually planned around: continuous frost windows. Each window carries its start and end hour, its duration, the lowest temperature within it and the hour that low occurs, so a two-hour dip at dawn is distinguishable from a night-long freeze. (0.005 USDC on Base)
• POST /v1/growing-degree-days — Accumulates growing degree days at a location from the hourly forecast, for a base temperature you choose. Two methods are returned side by side: the hourly integration, which is the more accurate, and the conventional average of daily maximum and minimum, which is what agronomic tables and most published thresholds are built on. Reporting only one would either be less accurate or incomparable with the literature, so both are given with the difference between them stated. (0.005 USDC on Base)
• POST /v1/solar-storm — Assembles the current state of geomagnetic activity from four NOAA sources and says what each one is good for. The planetary Kp index is the standard scale and maps to the G-scale storm levels, but it is computed from ground magnetometers and therefore describes a storm that has already arrived. (0.004 USDC on Base)
• POST /v1/river-anomaly — Compares the recent record of a gauge against its own longer history and reports three kinds of finding, kept separate because their causes differ. An extreme level is a reading in the top or bottom percentile of the reference period. An unusual rate of rise is a change per hour exceeding the station own typical rate by a stated factor — this is the figure that matters in a flood and it leads the level rather than following it, so it is reported even when the absolute value is still ordinary. (0.005 USDC on Base)
• POST /v1/fire-weather — Calculates the Canadian Fire Weather Index components from an hourly forecast: the Fine Fuel Moisture Code for the surface litter that carries ignition, the Duff Moisture Code and Drought Code for the deeper layers that determine whether a fire keeps going, the Initial Spread Index combining wind with surface dryness, the Buildup Index, and the resulting Fire Weather Index. (0.005 USDC on Base)
• POST /v1/species-taxonomy — Takes a scientific or vernacular name and returns the accepted taxon it belongs to, with the complete classification from kingdom down to species, the taxonomic authority, the GBIF key and any linked identifiers. The distinction the response keeps is the one that matters for anything downstream: whether the name you supplied is the accepted name or a synonym, and if it is a synonym, what the accepted name is. (0.004 USDC on Base)
• POST /v1/volcanic-ash-route — Takes a route as an ordered list of waypoints, samples it at a chosen spacing and tests every sample against the currently active SIGMETs carrying a volcanic ash hazard. For each hit you get the affected segment as a from-to pair of waypoints, the SIGMET issuing centre and flight information region, the validity window, the reported base and top of the ash layer, and the raw text. (0.006 USDC on Base)
• POST /v1/aviation-brief — Collects the current observation, the terminal forecast, nearby pilot reports and active SIGMETs for the requested airports and returns them in one shape. The observation carries temperature, dewpoint, wind with gusts, visibility, altimeter setting, the cloud layers with their bases, and the derived ceiling — the lowest broken or overcast layer, which is the value that matters and is not the same as the lowest layer reported. (0.005 USDC on Base)

+5 more endpoints.