# APEX — Adaptive Payload EXchange

**Canonical:** https://apis.io/apis/neros/apex/  
**Provider:** Neros — https://apis.io/providers/neros/  
**Documentation:** https://github.com/Neros-Technologies/APEX

APEX — Adaptive Payload EXchange is published by [Neros](https://apis.io/providers/neros/) on the [APIs.io](https://apis.io/) network. Tagged areas include Protocol, Drones, Payloads, Embedded, and Interoperability.

APEX is Neros Technologies' open, MIT-licensed plug-and-play protocol for connecting drone platforms (hosts) and payloads (devices) over a standard 10-pin connector. The core protocol is class-agnostic — COBS framing, a 4-byte outer header, CRC-16/CCITT-FALSE, baud negotiation, a three-leg discovery handshake (DEVICE_INFO to CONFIG_REPLY to CONFIG_ACK), capability exchange, and a device lifecycle the host tracks — while payload behavior is defined in separate device-class specifications (Activation, Analog HMI, Wayfinding, Repeater; USB_FS_HUB reserved). It is a UART wire protocol, not an HTTP API: there is no base URL, no authentication scheme, and no hosted endpoint.

## Machine-readable artifacts (4)

- **SourceCode** — https://github.com/Neros-Technologies/APEX
- **Specification** — https://github.com/Neros-Technologies/APEX/blob/main/spec/APEX_Core.md
- **License** — https://github.com/Neros-Technologies/APEX/blob/main/LICENSE
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/neros/refs/heads/main/apis.yml

## Tags

Protocol, Drones, Payloads, Embedded, Interoperability

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/neros/apex/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/neros/.