# RTK Motion Rehabilitation Biomechanics Report

> RTK Motion Rehabilitation Biomechanics Report is a paid API for AI agents from api.rtkmotion.io, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Generates a per-exercise rehabilitation biomechanics report covering CoM stability, rep detection, joint load, bilateral asymmetry, ROM, and fatigue markers for one of five supported exercises.

## Facts

- Endpoint: GET https://api.rtkmotion.io/paid/rehab-report
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rtk-motion-rehabilitation-biomechanics-report-93f6c7e3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HkkgZblDpQVpyoeCROWr3

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

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability rtk-motion-rehabilitation-biomechanics-report-93f6c7e3
```

Example prompt: Pull the RTK Motion rehab biomechanics report for Squats — I need the CoM stability, bilateral asymmetry, joint load, and fatigue markers for a PT outcome measurement.

## When to prefer this

Choose this endpoint when you need a single-exercise, clinically-oriented biomechanics report with ECDSA-signed provenance for PT outcome measurement or medical insurance review. Prefer this over the cross-exercise summary endpoint when you need deep per-exercise detail (rep detection, fatigue markers, joint load) rather than an aggregate overview across exercises.

## Known failure modes

- Invalid exercise slug returns error or defaults to Burpees
- Payment failure (x402) blocks report delivery
- Unsigned or tampered payload if signature verification fails downstream
- Unsupported exercise type not in enum returns error response
- Network timeout during report generation

## How this service works

RTK Motion — per-exercise rehabilitation biomechanics report. CoM stability, rep detection, joint load, bilateral asymmetry, ROM, and fatigue markers for one exercise. Default exercise Burpees (?exercise=Burpees|HeadRotation|Pushups|SquatLunge|Squats). For PT_outcome_measurement or medical_insurance_review. JSON+TXT, ECDSA-signed provenance.

## Output

A JSON and TXT report (ECDSA-signed for provenance) containing: center-of-mass stability scores, detected rep count and quality, joint load values, bilateral asymmetry metrics, range-of-motion angles, and fatigue markers — all specific to the requested exercise.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "exercise": {
       "type": "string",
       "description": "Exercise slug: 'Burpees' (default), 'HeadRotation', 'Pushups', 'SquatLunge', or 'Squats'."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "case": "PhysicalRehab/40-50/Male/LabrumTear",
  "domain": "Rehabilitation Biomechanics",
  "report": {
   "rom": {},
   "fatigue": {},
   "asymmetry_pct": 0,
   "com_stability": {}
  },
  "sha256": "…",
  "formats": [
   "JSON",
   "TXT"
  ],
  "exercise": "Burpees",
  "next_step": {
   "note": "The complete report is delivered inline in `report`; download_url is a convenience copy.",
   "action": "Optional: GET download_url for the canonical report.json file",
   "required": false,
   "expires_in_seconds": 900
  },
  "provenance": {
   "algorithm": "secp256k1-ECDSA",
   "signed_by": "0x6C11F8a21f7ca922F483Ed21C3b6c2d9B305B10C"
  },
  "download_url": "https://api.rtkmotion.io/data/…",
  "human_readable_report": "…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rtk-motion-rehabilitation-biomechanics-report-93f6c7e3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.rtkmotion.io](https://www.zero.xyz/host/api.rtkmotion.io/llms.txt)