# RQM Reconstruct Time Domain Signal

> RQM Reconstruct Time Domain Signal is a paid API for AI agents from jobs.rqmtechnologies.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Converts bounded frequency-domain bins (complex samples) back into time-domain samples via inverse FFT and validates round-trip accuracy against a caller-supplied maximum RMSE threshold.

## Facts

- Endpoint: POST https://jobs.rqmtechnologies.com/x402/buyer-jobs/wave.reconstruct-time-domain-signal.v1
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rqm-reconstruct-time-domain-signal-8ba244ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_X0ojYk43pO5J7W_cprVQk

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-reconstruct-time-domain-signal-8ba244ff -d '<json body>'
```

Example prompt: Take these 512 complex frequency bins sampled at 44100 Hz with ortho normalization and reconstruct the original time-domain signal, then verify the round-trip RMSE stays below 0.01.

## When to prefer this

Use this endpoint when you have frequency-domain complex bins (e.g. from an FFT or RQM's Convert Capture To Spectrum endpoint) and need to recover the original time-domain signal with a bounded, verifiable reconstruction error. Ideal for pipelines that require a quantitative round-trip RMSE guarantee before passing results downstream. Prefer this over manual IFFT implementations when you need a managed, pay-per-call service with built-in validation. Not suitable when you need streaming reconstruction, hardware-in-the-loop truth, or causal/physical diagnosis of the signal.

## Known failure modes

- RMSE exceeds maximum_round_trip_rmse threshold — reconstruction rejected
- frequency_bins count outside 1–4096 range — validation error
- sample_rate_hz is zero or negative — rejected
- invalid normalization enum value — schema error
- mismatched reference_time_samples length — error
- malformed complex sample (missing real or imaginary) — schema validation failure
- payment failure (x402) — request not processed

## How this service works

Reconstruct Time Domain Signal: Convert these bounded frequency bins into time-domain samples and verify the caller's... Use when: The caller needs a bounded objective result that can directly gate or feed its next step. Returns: strict JSON summary, checksummed artifact manifest. Boundaries: Deterministic bounded local signal processing only; no causal, hardware, physical, regulatory, safety, or...

## Output

Returns time-domain complex samples reconstructed from the input frequency bins, along with a round-trip RMSE value computed against optional reference samples, and a pass/fail verdict indicating whether the RMSE is within the caller-specified maximum threshold.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "request": {
   "type": "object",
   "description": "Reconstruct Time Domain Signal request metadata is discovery-only while execution is disabled.",
   "additionalProperties": true
  },
  "schema_version": {
   "const": "rqm.jobs.bazaar-buyer-job-request.v1"
  },
  "idempotency_key": {
   "type": "string",
   "pattern": "^[A-Za-z0-9][A-Za-z0-9._:-]*$",
   "maxLength": 128,
   "minLength": 1
  },
  "max_total_price": {
   "type": "string",
   "pattern": "^(?:0|[1-9]\\d{0,13})(?:\\.\\d{1,6})?$"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rqm-reconstruct-time-domain-signal-8ba244ff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from jobs.rqmtechnologies.com](https://www.zero.xyz/host/jobs.rqmtechnologies.com/llms.txt)