# NEXUS Agent Services – Fast Trading Signal

> NEXUS Agent Services – Fast Trading Signal is a paid API for AI agents from nexus-agent-xa12.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns a fast-tier directional trading signal (BULLISH/BEARISH/NEUTRAL) with confidence score for a given crypto symbol, paid per-call via USDC on Base.

## Facts

- Endpoint: GET https://nexus-agent-xa12.onrender.com/v1/signals/fast
- 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/nexus-agent-services-fast-trading-signal-faa38fb8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JiLkhve9IbxPG69iEP5He

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 nexus-agent-services-fast-trading-signal-faa38fb8
```

Example prompt: What's the current NEXUS fast signal for BTC — is it bullish or bearish, and how confident is the model?

## When to prefer this

Use this endpoint when an agent needs a quick, low-latency directional trading signal for BTC, ETH, or SOL and is willing to pay $0.02 USDC per call via x402 on Base. Prefer this over the other NEXUS tiers when speed matters more than depth of analysis.

## Known failure modes

- Payment not fulfilled via x402 — returns 402 Payment Required if USDC payment on Base is not completed
- Invalid or unsupported symbol — only BTC, ETH, SOL are accepted; other symbols may return an error or empty result
- Service unavailable — hosted on Render free tier, cold starts may cause timeouts
- Missing required query parameter — omitting symbol may result in a missing or malformed response

## How this service works

Pay-per-call financial data. Streamable HTTP MCP. x402 USDC on Base. Not financial advice.

## Output

A JSON object containing: the signal tier ('fast'), a directional signal string (e.g. 'BULLISH'), the data source ('NEXUS_FAST'), the queried symbol (e.g. 'BTC'), and a confidence score between 0 and 1 (e.g. 0.55).

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "symbol": {
       "type": "string",
       "description": "BTC, ETH, SOL"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": "fast",
  "signal": "BULLISH",
  "source": "NEXUS_FAST",
  "symbol": "BTC",
  "confidence": 0.55
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexus-agent-services-fast-trading-signal-faa38fb8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-agent-xa12.onrender.com](https://www.zero.xyz/host/nexus-agent-xa12.onrender.com/llms.txt)