# Services from iot.halowerk.com on Zero

> iot.halowerk.com serves 10 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/iot.halowerk.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/iot.halowerk.com/health.json

## Services

- [LoRa Coverage Link Budget Calculator](https://www.zero.xyz/c/lora-coverage-link-budget-calculator-17938b35/llms.txt): $0.003/call via x402. Computes estimated LoRa receive power and link margin using free-space path loss at 1m, a caller-supplied path-loss exponent, antenna gains, and receiver sensitivity.
- [Halowerk IoT Battery Degradation Calculator](https://www.zero.xyz/c/halowerk-iot-battery-degradation-calculator-6fa25e3a/llms.txt): $0.003/call via x402. Estimates remaining battery capacity after cycle and calendar fade using caller-supplied or default heuristic coefficients.
- [Halowerk IoT Fleet Anomaly Detector](https://www.zero.xyz/c/halowerk-iot-fleet-anomaly-detector-be981f18/llms.txt): $0.003/call via x402. Detects cross-sectional outliers in a fleet of IoT device readings using robust z-scores based on cohort median and median absolute deviation.
- [Halowerk IoT Sensor Calibration — OLS Linear Fit](https://www.zero.xyz/c/halowerk-iot-sensor-calibration-ols-linear-fit-0715d90e/llms.txt): $0.003/call via x402. Fits a linear calibration model (reference = slope × observed + offset) using ordinary least squares over paired sensor readings, returning slope, offset, and residual diagnostics.
- [Halowerk Robotic Path Clearance Calculator](https://www.zero.xyz/c/halowerk-robotic-path-clearance-calculator-f55c604d/llms.txt): $0.004/call via x402. Computes the minimum Euclidean clearance between each circular obstacle and every segment of a robot's planned path, accounting for both obstacle radius and robot radius.
- [Halowerk Edge Compute Bid Ranker](https://www.zero.xyz/c/halowerk-edge-compute-bid-ranker-f5aedf0d/llms.txt): $0.004/call via x402. Filters edge compute provider candidates by CPU, memory, and latency constraints, computes total workload cost from quoted unit prices, and returns feasible candidates ranked by cost then latency.
- [Halowerk IoT Device HMAC-SHA256 Authentication](https://www.zero.xyz/c/halowerk-iot-device-hmac-sha256-authentication-f9fcdaf3/llms.txt): $0.002/call via x402. Canonicalizes device_id, nonce, and message, then computes or verifies an HMAC-SHA256 authentication tag using caller-supplied ephemeral key material for IoT device challenge-response flows.
- [iot.halowerk.com OTA Firmware Release Tagger](https://www.zero.xyz/c/iot-halowerk-com-ota-firmware-release-tagger-ef71ca84/llms.txt): $0.003/call via x402. Canonicalizes firmware metadata (hash, version, device model, minimum bootloader) and produces a SHA-256 manifest digest plus HMAC-SHA256 release tag using caller-supplied ephemeral key material.
- [Halowerk IoT Digital Twin Field Sync](https://www.zero.xyz/c/halowerk-iot-digital-twin-field-sync-7fd53afd/llms.txt): $0.004/call via x402. Groups scalar field changes from local and remote sources by field name, selects the highest-version value as the winner, and flags conflicts where equal-version values differ.
- [Halowerk IoT Mesh Route Planner](https://www.zero.xyz/c/halowerk-iot-mesh-route-planner-617f1332/llms.txt): $0.004/call via x402. Computes a deterministic shortest path through a caller-supplied directed or bidirectional weighted graph using non-negative edge costs.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)