# x402-seller Signal Feed

> x402-seller Signal Feed is a paid API for AI agents from x402-seller-m8nx.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns a real-time market signal or price data point for a given token symbol, as part of a broader rug-protection and alpha intelligence suite for autonomous trading agents.

## Facts

- Endpoint: GET https://x402-seller-m8nx.onrender.com/signal
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-seller-signal-feed-3b2310db
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0TjxotK2sSNGOJjU1734F

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 x402-seller-signal-feed-3b2310db
```

Example prompt: Pull the current market signal for $WIF from x402-seller — I want to see the latest signal data before I make a trading decision.

## When to prefer this

Use this endpoint when your trading agent needs a quick, keyless, micropayment-based market signal for a specific token without setting up API credentials. Ideal for autonomous agents that need raw signal feeds without building integrations to multiple free APIs.

## Known failure modes

- Missing or invalid symbol parameter returns an error or empty response
- Payment not processed (x402 USDC payment fails) results in 402 Payment Required
- Token symbol not found in feed returns null or empty data
- Rate limiting or server downtime on Render hosting causes timeout
- Unsupported or delisted token returns no signal data

## How this service works

Rug protection and decision-ready intelligence for autonomous trading agents. Keyless by design: no signup, no API key — pay a cent per request in USDC (x402). The /alpha/launches LAUNCH RADAR discovers what just launched AND rug-screens every candidate in one call, ranked per-token verdicts — the proactive 'give me safe alpha' call. /vet gives a single-token go/no-go in ONE call by fusing a COMPOSITE rug score (GoPlus static analysis + a LIVE Honeypot.is buy/sell simulation + serial-rugger check) with our SELF-COLLECTED liquidity-drain trend — a rug-in-progress signal that exists nowhere for free because it requires collecting reserves over time. One call is cheaper than the inference tokens you'd burn stitching 4 free APIs, and it stops your agent losing its whole position to a honeypot. Also: /onchain/liquidity drain detector, /screen batch watchlist check, /brief market regime, and raw feeds (prices, stocks, DEX pools, launches, perp funding/OI).

## Output

Returns a JSON object containing market signal data for the requested token symbol — likely including price, signal score, or trend indicators relevant to autonomous trading decisions. Exact fields vary by token availability.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "symbol": {
       "type": "string",
       "default": "BTC"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "symbol": "BTC",
  "verdict": "bullish",
  "momentum": 0.42,
  "price_usd": 63950,
  "change_24h_pct": 0.5
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-seller-signal-feed-3b2310db/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-seller-m8nx.onrender.com](https://www.zero.xyz/host/x402-seller-m8nx.onrender.com/llms.txt)