# SentEdge SFX Gallery – WAV Delivery

> SentEdge SFX Gallery – WAV Delivery is a paid API for AI agents from sentedge.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns a machine-verified, production-ready WAV sound effect as base64 JSON with full acoustic metadata for agent-driven placement without listening.

## Facts

- Endpoint: POST https://sentedge.ai/api/sfx/:id/wav
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sentedge-sfx-gallery-wav-delivery-12fc1104
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sAnB8XBjcP45b87fF1Wj5

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 sentedge-sfx-gallery-wav-delivery-12fc1104 -d '<json body>'
```

Example prompt: Fetch the SentEdge SFX with ID sfx_doorbell_001 — I need the WAV and its acoustic metadata including where to align it to the cut and how much gain to apply.

## When to prefer this

Choose this endpoint when you need a single, production-verified sound effect delivered with full acoustic metadata for automated placement — particularly when no human will audition the audio and precise alignment data (start/peak/end, gain, dialogue-masking) is required. It is ideal for AI-driven video editing, game audio pipelines, or automated post-production workflows where audio quality guarantees and machine-readable placement cues matter more than breadth of catalogue options.

## Known failure modes

- Unknown SFX ID returns a 404 with an error message and empty audio payload
- Payment failure via x402 returns a 402 with payment instructions before audio is delivered
- Malformed POST body returns a 400 validation error
- Server-side verification failure (e.g. clipping detected post-processing) may return a 500 with a rejection reason

## How this service works

Master WAV of one verified SentEdge sound effect — 44.1kHz stereo, peak-normalised to -1 dBFS, trimmed and faded, delivered base64 in JSON with its measured acoustics. Every sound is machine-verified: envelope shape matches its declared intent, no clipping, one transient where one was specified. The metadata tells an agent where to align it to a cut (start/peak/end), whether it masks dialogue, and what gain to apply — so it can be placed without listening. Non-exclusive. Free searchable catalogue: GET https://sentedge.ai/api/sfx — filter by name, band, cut-alignment, dialogue-masking, loopability or duration (?q=, ?occupies=, ?align_on=, ?masks_dialogue=, ?loopable=, ?max_duration_s=, ?limit=) instead of pulling all 1000.

## Output

A JSON object containing the full WAV audio file base64-encoded (44.1kHz stereo, peak-normalised to -1 dBFS, trimmed and faded), plus acoustic metadata fields including envelope shape, transient position (start/peak/end timestamps), dialogue-masking flag, and recommended gain value — everything needed to place the effect programmatically without auditioning.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sentedge-sfx-gallery-wav-delivery-12fc1104/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sentedge.ai](https://www.zero.xyz/host/sentedge.ai/llms.txt)