# Predge Whale Intelligence — Prediction Market Call Logger

> Predge Whale Intelligence — Prediction Market Call Logger is a paid API for AI agents from api.predge.io, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Records a signed prediction market call (yes/no position) on a Polymarket condition, with optional stake and note, returned as a cryptographically chained entry.

## Facts

- Endpoint: POST https://api.predge.io/v1/calls
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/predge-whale-intelligence-prediction-market-call-logger-d12bb317
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cFRekg6Zji3q6aHQMB_uH

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 predge-whale-intelligence-prediction-market-call-logger-d12bb317 -d '<json body>'
```

Example prompt: Log a 'yes' call on Polymarket condition 0xabc123 for $250 with the note 'strong insider signal' on Predge so I have a signed, auditable record of my trade.

## When to prefer this

Choose this endpoint when you need a cryptographically signed, tamper-evident, sequentially chained log of a Polymarket prediction call — especially for whale-grade accountability, auditability, or building a verifiable track record of positions on open Polymarket markets. Prefer it over simple off-chain note-taking when provable timestamps and ed25519-signed integrity matter.

## Known failure modes

- Invalid or closed Polymarket condition_id returns an error (market not open)
- Malformed side value (not 'yes' or 'no') causes validation failure
- Note exceeding 500 characters is rejected
- Invalid size_usd format (not fixed 2 decimal places) causes rejection
- Payment failure (insufficient USDC) blocks the call from being recorded
- Signature verification failure returns authentication error

## How this service works

Real-time alerts on whale traders on Polymarket. Heuristic Insider Watch, wallet scoring 0–100, Bloomberg-style web terminal. Free plan included.

## Output

Returns a JSON object containing a unique call ID (UUID), a sequence number, a signed call object with ed25519 algorithm and canonical payload, and two SHA hashes (prev_hash and content_hash) forming a tamper-evident chain of prediction records.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "note": {
   "type": "string",
   "description": "Optional free-text note (<=500 chars, signed)"
  },
  "side": {
   "type": "string",
   "description": "\"yes\" or \"no\""
  },
  "size_usd": {
   "type": "number",
   "description": "Optional stake to record (signed as fixed 2-dp string)"
  },
  "condition_id": {
   "type": "string",
   "description": "Polymarket condition id of an OPEN market"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "0b5e7c1e-0000-4000-8000-000000000000",
  "seq": 42,
  "call": {
   "kind": "live-call",
   "algorithm": "ed25519",
   "canonical": "{…}",
   "signature": "…"
  },
  "prev_hash": "a1b2…",
  "content_hash": "9f8e…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/predge-whale-intelligence-prediction-market-call-logger-d12bb317/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.predge.io](https://www.zero.xyz/host/api.predge.io/llms.txt)