# Amprius Technologies

**Canonical:** https://apis.io/providers/amprius/  
**Website:** https://amprius.com  
**APIs profiled:** 0

Amprius Technologies is a Fremont, California-based developer and manufacturer of high-energy density lithium-ion batteries built on a proprietary 100% silicon anode platform. Its flagship SiCore and SiMaxx cell families are marketed as among the industry's highest gravimetric and volumetric energy density rechargeable cells, enabling longer endurance, faster charging, and higher payload capacity than conventional graphite-anode chemistries. Amprius targets aviation and aerospace (high-altitude pseudo-satellites, unmanned aerial systems, electric vertical takeoff and landing aircraft), defense (US Army soldier-worn power, BAE Systems), light electric vehicles, robotics, and AI hardware. Public references include AALTO's Airbus-derived Zephyr HAPS programs, Prismatic's PHASA-35 stratospheric aircraft, Nokia Drone Networks, and Matternet drone delivery. The company runs pilot manufacturing and R&D in Fremont and is scaling a GWh-scale Brighton, Colorado plant alongside contract manufacturing partnerships in Asia. Amprius is publicly traded on the New York Stock Exchange under the ticker AMPX. It is certified to ISO 9001:2015 and AS9100:2016. Amprius sells cells, modules, and engineering services to OEMs and defense primes; it does not publish a developer API, SDK, or open-source battery telemetry interface, and has no public GitHub organization.

## Kin Score — 3.8 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 3.8).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 2.4 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

Regulatory layer — **Energy & Utilities**: 8.1 (matched via tags).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Amprius Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Batteries, Lithium-Ion, Silicon Anode, Energy Density, Energy Storage, Aviation, Aerospace, Defense, Unmanned Aerial Systems, High Altitude Pseudo Satellites, Electric Vehicles, Robotics, Hardware, Manufacturing, Public Company

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/amprius/). Scores are computed from the provider's own public artifacts under a published rubric.