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predgeAI

whale-data-mcp

by predgeAI
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TypeScript
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@predge/whale-data-mcp

MCP server that exposes the Predge Whale Data x402 API (Polymarket whale trades + smart-money signals) as tools. Payment is handled under the hood: each paid tool call signs a USDC micropayment via an x402 client — the agent just calls the tool and gets data back. You supply a funded buyer key.

Defaults to Base mainnet (the live Predge API is mainnet-only). Paid tools spend real USDC — typically $0.005–$0.03/call, hard-capped at MAX_PRICE_USD ($0.05 by default) before any money moves. Use a dedicated, low-balance buyer wallet.

Install (one command)

Claude Code:

claude mcp add predge-whale-data \
  -e BUYER_PRIVATE_KEY=0xYOUR_FUNDED_BASE_MAINNET_KEY \
  -e X402_NETWORK=base \
  -- npx -y @predge/whale-data-mcp

Claude Desktop / Cursor / any MCP client — add to the client's MCP config:

{
  "mcpServers": {
    "predge-whale-data": {
      "command": "npx",
      "args": ["-y", "@predge/whale-data-mcp"],
      "env": {
        "BUYER_PRIVATE_KEY": "0xYOUR_FUNDED_BASE_MAINNET_KEY",
        "X402_NETWORK": "base"
      }
    }
  }
}

That's it — the agent gets 19 tools (18 paid routes + 1 free discovery tool). No API keys, no account; the buyer key pays USDC per call on Base or Solana. Fund it with a few dollars of USDC (the facilitator pays gas, so no ETH/SOL needed).

ElizaOS — add to your character file (via @fleek-platform/eliza-plugin-mcp):

{
  "plugins": ["@fleek-platform/eliza-plugin-mcp"],
  "settings": {
    "mcp": {
      "servers": {
        "predge": {
          "type": "stdio",
          "command": "npx",
          "args": ["-y", "@predge/whale-data-mcp"],
          "env": { "BUYER_PRIVATE_KEY": "0xYOUR_FUNDED_BASE_MAINNET_KEY", "MAX_PRICE_USD": "0.05" }
        }
      }
    }
  }
}

Set MAX_PRICE_USD to hard-cap spend — any call above it is refused before payment. Full integration guide (ElizaOS, Claude, raw x402 for non-MCP stacks, spend caps): https://data.predge.io/agents

Related MCP server: polymarket-trader-mcp

Tools

Tool

Price

Returns

predge_list_endpoints

free

API description + every endpoint with its price/schema (call first)

predge_whales_latest

~$0.005

Latest whale trades ≥$10k (15-min delay). Param: limit (1-100)

predge_whale_market

~$0.01

7-day whale activity for one market. Param: condition_id

predge_signals_daily

~$0.02

24h digest: top markets, net flow, largest bets

predge_wallets_leaderboard

~$0.01

Wallets by realized win rate. Params: window (7d|30d), limit

predge_wallet_profile

~$0.01

Wallet score, win rates, categories, last 20 trades. Param: address

predge_markets_movers

~$0.005

Largest YES-price moves. Param: window (1h|6h|24h)

predge_signals_consensus

~$0.03

Edge-verified smart-money net flow + direction per market

predge_attest ⭐

~$0.02

Flagship. Resolved-outcome attestation — the settled truth for a market (resolved, resolution, resolved_at). Optional side (yes|no) checks whether a past signal/win-rate claim was actually right. Params: condition_id, side

predge_sports_attest ⭐

~$0.02

Flagship. Ed25519-signed settled game outcome (winner, final score, completed) from ESPN, verifiable offline against Predge's published key. Optional winner (team abbr) → correct. Settle bets / prove a track record on tamper-evident truth. Leagues: nba, wnba, nfl, college-football, mlb, nhl, mls, epl, champions-league, laliga. Params: league, event_id, winner

predge_kalshi_attest ⭐

~$0.02

Flagship. Ed25519-signed settled Kalshi market resolution (resolved, resolution yes|no, resolved_at) from Kalshi's public API, verifiable offline. Attests the market's own result, not trader data. Optional side (yes|no) → correct. Params: ticker, side

predge_wallet_attest ⭐

~$0.02

Flagship. Ed25519-signed wallet win/loss track record over resolved markets, verifiable offline — turns a self-reported win rate into signed proof. Param: window (7d|30d, default 30d). Params: address, window

predge_bets_biggest

~$0.005

Top-20 largest single trades across all markets. Param: window (24h|7d)

predge_signals_daily_category

~$0.01

24h digest scoped to one category. Param: category

predge_signals_consensus_category

~$0.02

Consensus scoped to one category. Param: category

predge_signals_market

~$0.01

Single-market smart-money verdict ("trust this move?"). Param: condition_id

predge_wallet_history

~$0.02

Wallet trade history + running win-rate & PnL curve. Params: address, window (30d|90d|all)

predge_wallets_compare

~$0.02

Compare 2-10 wallets side-by-side + market overlap. Param: addresses

predge_market_history

~$0.01

Price/volume history for one market. Params: condition_id, window (7d|30d|all)

Every paid result includes a note with the on-chain settle tx. The two Kalshi routes (anonymous institutional flow) are not yet exposed as tools — they activate when Kalshi ingest is enabled; raw x402/HTTP already reaches them.

Config (env)

Paid tools need a funded key for at least one rail — Base (BUYER_PRIVATE_KEY) and/or Solana (SOLANA_BUYER_SECRET). Every paid route's 402 offers both networks; the client pays on whichever it holds a key for (cheapest when both). The facilitator pays the network fee on either rail — the wallet needs USDC only.

Var

Default

Notes

BUYER_PRIVATE_KEY

—

Funded Base-mainnet EVM key (0x…) for the Base rail.

SOLANA_BUYER_SECRET

—

Optional. Funded Solana-mainnet key (64-number JSON array or base58) for the Solana rail.

X402_NETWORK

base

Base network: base = mainnet (real USDC), base-sepolia only against a testnet deployment.

X402_SOLANA_NETWORK

matches X402_NETWORK

solana (mainnet) or solana-devnet.

SOLANA_RPC_URL

@x402/svm default

Optional custom Solana RPC (public mainnet-beta is rate-limited).

PREDGE_BASE_URL

prod API

https://x402-api-production-266e.up.railway.app. Override to point at another deployment.

MAX_PRICE_USD

0.05

Any call priced above this is refused before paying.

PREDGE_MCP_USER_AGENT

predge-whale-data-mcp/0.1.1

Sent on every request (lets the API attribute MCP traffic).

The free predge_list_endpoints tool works without any key.

Testnet

To exercise the payment path without real money, point PREDGE_BASE_URL at a Base-Sepolia deployment of the API and set X402_NETWORK=base-sepolia; fund the buyer from faucet.circle.com. (The public prod API is mainnet-only, so testnet needs your own deployment.)

Safety

  • Price cap — MAX_PRICE_USD is enforced in the payment selector, so an over-cap call is refused before any money moves (no wasted request).

  • Network guard — the client only pays a requirement on the configured network; it won't accidentally settle a mainnet requirement while in testnet mode (or vice-versa).

  • No key handling beyond env — the server reads BUYER_PRIVATE_KEY from env, never logs it, and never sends it anywhere but the local signer. Use a dedicated low-balance wallet and keep the key out of version control.

Run from source

git clone https://github.com/predgeAI/whale-data-mcp.git
cd whale-data-mcp && npm install && npm run build
# then point your MCP client's "command" at node with args ["/abs/path/whale-data-mcp/dist/index.js"]

Verify locally

npm run inspect                                        # list tools (no payment)
node dist/dev-list-tools.js predge_list_endpoints      # free call against prod
# paid call (spends real USDC on mainnet):
BUYER_PRIVATE_KEY=0x… X402_NETWORK=base node dist/dev-list-tools.js predge_whales_latest '{"limit":2}'

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