# Delx Signal Threshold

> Delx Signal Threshold is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Classifies a numeric signal value against optional upper and/or lower thresholds, returning a deterministic machine-readable JSON result

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/signal-threshold
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-signal-threshold-2313e816
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Y4KZH91prwcvnFfzu1Q8E

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 delx-signal-threshold-2313e816 -d '<json body>'
```

Example prompt: Classify this signal value of 0.87 against a lower threshold of 0.20 and an upper threshold of 0.75 — tell me which zone it falls in.

## When to prefer this

Choose this endpoint when you need fast, stateless, deterministic threshold classification of a numeric signal you already have in hand — particularly when you do not have access to a live market data feed and want a cheap ($0.003 USDC) first-party transform with no input retention. Ideal for signal prep pipelines, backtesting logic, or any agent workflow that computes its own tick or return values and needs boundary classification without calling an external data provider.

## Known failure modes

- Missing required 'value' field returns a validation error
- Non-numeric value type causes a schema rejection
- Upper threshold lower than lower threshold may produce unexpected or inverted zone classification
- Payment failure via x402 results in a 402 response before computation occurs

## How this service works

Classify a signal against optional upper and lower thresholds — call when classifying a signal against upper/lower thresholds. Use on caller-supplied ticks/returns when agents need signal prep without a licensed live market feed (ottoai-class demand, first-party transform). Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web se…

## Output

A deterministic JSON object indicating which zone the input value falls into relative to the supplied thresholds — e.g. whether the value is below the lower threshold, above the upper threshold, or within the defined range. No upstream data fetching occurs; the result is computed locally and statelessly from the caller-supplied inputs.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "lower": {
   "type": "number",
   "description": "Optional lower threshold."
  },
  "upper": {
   "type": "number",
   "description": "Optional upper threshold."
  },
  "value": {
   "type": "number",
   "description": "Numeric signal to classify against optional lower/upper thresholds."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "lower": 0,
  "state": "above_upper",
  "upper": 10,
  "value": 12,
  "schema": "delx/util-signal-threshold/v1",
  "triggered": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-signal-threshold-2313e816/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)