# Octodamus Agent Signal

> Octodamus Agent Signal is a paid API for AI agents from api.octodamus.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns a real-time AI-generated crypto market signal (BUY/SELL/HOLD, bullish/bearish/neutral, BTC trend, Fear & Greed index, Polymarket edge) for agent-driven trading decisions.

## Facts

- Endpoint: GET https://api.octodamus.com/v2/x402/agent-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/octodamus-agent-signal-d3818ba4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n-yJa3i-juq9XIED7qfCy

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 octodamus-agent-signal-d3818ba4
```

Example prompt: What's Octodamus's current AI trading signal for crypto — should I buy, sell, or hold, and what's the Fear & Greed score and BTC trend right now?

## When to prefer this

Use this endpoint when an AI agent needs a real-time, AI-synthesized crypto trading recommendation that combines sentiment (Fear & Greed), BTC price trend, and prediction market edge (Polymarket) into a single actionable signal. Prefer this over raw price feeds when you want an interpreted, opinionated signal with reasoning rather than raw market data.

## Known failure modes

- Missing or invalid PAYMENT-SIGNATURE header returns 402 Payment Required
- Expired or already-used EIP-3009 signature returns authentication error
- Network congestion on Base mainnet delays payment verification
- Insufficient USDC balance causes payment failure and no signal returned
- Rate limiting if called too frequently within a short window

## How this service works

Octodamus — AI oracle for crypto and tokenized NYSE markets. BUY/SELL/HOLD signals, Polymarket edges, Fear & Greed, macro regime. Ed25519 signed.

## Output

Returns a JSON object with: action (BUY/SELL/HOLD), signal (BULLISH/BEARISH/NEUTRAL), btc_trend (UP/DOWN/SIDEWAYS), a human-readable reasoning string, a confidence score between 0 and 1, a Fear & Greed index value (0-100), and a Polymarket edge object with prediction market data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "type": "string",
     "const": "GET"
    },
    "headers": {
     "type": "object",
     "required": [
      "PAYMENT-SIGNATURE"
     ],
     "properties": {
      "PAYMENT-SIGNATURE": {
       "type": "string",
       "description": "x402 EIP-3009 USDC payment signature (Base mainnet)"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "action": {
     "enum": [
      "BUY",
      "SELL",
      "HOLD"
     ],
     "type": "string"
    },
    "signal": {
     "enum": [
      "BULLISH",
      "BEARISH",
      "NEUTRAL"
     ],
     "type": "string"
    },
    "btc_trend": {
     "enum": [
      "UP",
      "DOWN",
      "SIDEWAYS"
     ],
     "type": "string"
    },
    "reasoning": {
     "type": "string"
    },
    "confidence": {
     "type": "number",
     "maximum": 1,
     "minimum": 0
    },
    "fear_greed": {
     "type": "number",
     "maximum": 100,
     "minimum": 0
    },
    "polymarket_edge": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "action": "BUY",
  "signal": "BULLISH",
  "btc_trend": "UP",
  "reasoning": "Oracle 9/11 consensus bullish. Fear & Greed neutral-greed zone.",
  "confidence": 0.78,
  "fear_greed": 62,
  "polymarket_edge": {
   "ev": 0.14,
   "market": "BTC above 90k"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/octodamus-agent-signal-d3818ba4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.octodamus.com](https://www.zero.xyz/host/api.octodamus.com/llms.txt)