# RQM Relay Multichannel IQ Capture Diagnostics

> RQM Relay Multichannel IQ Capture Diagnostics is a paid API for AI agents from api.rqm-relay.com, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-28).

Inspects up to eight channels of complex I/Q samples for nominal, degraded, or invalid signal quality and returns bounded findings with a diagnostic artifact.

## Facts

- Endpoint: POST https://api.rqm-relay.com/v1/capabilities/diagnose-multichannel-capture-v1/run?utm_source=zero.xyz
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rqm-relay-multichannel-iq-capture-diagnostics-bbfeeb6c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_X5zZcef31VXp9Fgh5VXEd

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 rqm-relay-multichannel-iq-capture-diagnostics-bbfeeb6c -d '<json body>'
```

Example prompt: Check the signal quality of my 8-channel IQ capture sampled at 2.4 MHz — channel IDs ch0 through ch7 — and tell me whether each channel is nominal, degraded, or invalid before I archive the data.

## When to prefer this

Use this endpoint when you need a programmatic, per-channel signal quality verdict on raw complex I/Q samples before processing or archiving — especially in automated pipelines handling SDR or phased array captures where degraded channels must be flagged before downstream use. Prefer this over manual inspection or single-channel validators when handling multichannel captures (up to 8 channels, up to 1024 samples each). Not suitable for hardware fault diagnosis or physical-cause root analysis.

## Known failure modes

- Invalid or expired quoteId — must obtain a fresh quote from /v1/quote before each call
- Sample count outside bounds — each channel requires between 1 and 1024 complex samples
- Channel count out of range — must supply between 1 and 8 channels
- sample_rate_hz out of range — must be greater than 0 and at most 1,000,000,000 Hz
- Malformed channel_id — must match pattern ^[A-Za-z0-9._-]+$ and be 1–64 characters
- Settlement pending — async result; caller must retry with the same signed request and idempotency key
- Missing required fields — sample_rate_hz or channels not provided

## How this service works

Inspect coordinated I/Q samples before processing or archiving. Send a sample rate and up to eight channels of complex samples (1024 per channel). Get nominal, degraded or invalid state with bounded findings and a diagnostic artifact. No physical-cause or hardware-failure diagnosis. First obtain a fresh /v1/quote for diagnose-multichannel-capture-v1. Price includes the Relay fee. Async result; retry the original signed request while settlement is pending.

## Output

Returns a diagnostic result indicating whether each channel's IQ capture is in a nominal, degraded, or invalid state, along with bounded findings describing specific quality issues detected and a diagnostic artifact for further review. No physical hardware or root-cause failure diagnosis is provided.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "title": "DiagnoseMultichannelCaptureRequest",
   "required": [
    "sample_rate_hz",
    "channels"
   ],
   "properties": {
    "channels": {
     "type": "array",
     "items": {
      "type": "object",
      "title": "WavePipelineChannelRequest",
      "required": [
       "channel_id",
       "samples"
      ],
      "properties": {
       "samples": {
        "type": "array",
        "items": {
         "type": "object",
         "title": "ComplexSampleRequest",
         "required": [
          "real",
          "imaginary"
         ],
         "properties": {
          "real": {
           "type": "number",
           "title": "Real"
          },
          "imaginary": {
           "type": "number",
           "title": "Imaginary"
          }
         },
         "additionalProperties": false
        },
        "title": "Samples",
        "maxItems": 1024,
        "minItems": 1
       },
       "channel_id": {
        "type": "string",
        "title": "Channel Id",
        "pattern": "^[A-Za-z0-9._-]+$",
        "maxLength": 64,
        "minLength": 1
       }
      },
      "additionalProperties": false
     },
     "title": "Channels",
     "maxItems": 8,
     "minItems": 1
    },
    "sample_rate_hz": {
     "type": "number",
     "title": "Sample Rate Hz",
     "maximum": 1000000000,
     "exclusiveMinimum": 0
    }
   },
   "additionalProperties": false
  },
  "quoteId": {
   "type": "string",
   "pattern": "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$",
   "description": "Obtain a fresh quote from POST /v1/quote for this capability; never reuse an example quote."
  },
  "idempotencyKey": {
   "type": "string",
   "maxLength": 200,
   "minLength": 8,
   "description": "A unique key for a new purchase; retain it unchanged for every retry."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rqm-relay-multichannel-iq-capture-diagnostics-bbfeeb6c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.rqm-relay.com](https://www.zero.xyz/host/api.rqm-relay.com/llms.txt)