Metengine Data Agent

curl -sL https://www.metengine.xyz/skill.md -o ~/.claude/agents/metengine-data-agent.md

# Add to crontab: crontab -e
0 0 * * 0 curl -sL https://www.metengine.xyz/skill.md -o ~/.claude/agents/metengine-data-agent.md 2>/dev/null

# Compare local vs remote version
LOCAL_VER=$(grep '^version:' ~/.claude/agents/metengine-data-agent.md | head -1 | tr -d '"' | awk '{print $2}')
REMOTE_VER=$(curl -sL https://www.metengine.xyz/skill.md | grep '^version:' | head -1 | tr -d '"' | awk '{print $2}')
[ "$LOCAL_VER" != "$REMOTE_VER" ] && curl -sL https://www.metengine.xyz/skill.md -o ~/.claude/agents/metengine-data-agent.md

~/.claude/agents/metengine-memory.md

# MetEngine Session Memory
<!-- Auto-maintained by agents. Do not delete. -->

## Last Updated
YYYY-MM-DD HH:MM UTC

## Skill Version
<version from frontmatter>

## Wallet
- keypair_path: ~/.config/solana/id.json
- public_address: <base58 pubkey -- NEVER store the private key>
- sol_balance_ok: true/false
- usdc_balance_ok: true/false
- last_balance_check: YYYY-MM-DD

## Packages
- installed: true/false
- install_dir: <path where bun add was run>
- packages: @x402/core, @x402/svm, @solana/kit
- bun_version: <version>

## Client Bootstrap
<!-- Paste the minimal working paidFetch setup here after first successful call -->
```typescript
// <paste the one-time setup + paidFetch function that worked>

### Memory Update Rules

Agents MUST update the memory file:

1. **After first successful setup** -- Record wallet path, public address, installed packages, working bootstrap code
2. **After every API call** -- Append to Endpoint History (keep last 10 rows, prune older)
3. **When a fallback is used** -- Record in Fallbacks Learned
4. **When a new quirk is discovered** -- Record in Quirks Encountered
5. **At session end** -- Update `Last Updated` timestamp

### How Memory Saves Tokens

| Without Memory | With Memory | Token Savings |
|---------------|-------------|---------------|
| Read full skill file (2400 lines) to find setup instructions | Skip to Client Bootstrap section | ~80% fewer setup tokens |
| Trial-and-error wallet detection | Read wallet path from memory | ~500 tokens saved |
| Install packages every session | Check `installed: true`, skip | ~200 tokens saved |
| Hit known-broken endpoint, get 504, try fallback | Check Fallbacks Learned, use fallback directly | ~1000 tokens saved per avoided failure |
| Re-discover quirks through errors | Check Quirks Encountered | ~300 tokens saved per quirk |

### Quick Start for Returning Agents

If `~/.claude/agents/metengine-memory.md` exists:

**First-time agents:** Follow the Onboarding Path below, then create the memory file.

### Wallet Security Rules

- **NEVER** read, log, print, or display the contents of any keypair file
- **NEVER** store private keys in the memory file
- **ONLY** store the file path and the public address
- Load the keypair at runtime using `Bun.file(path).text()` or `fs.readFileSync(path)` -- pipe directly into the signer, never into a variable that gets logged

---

## Onboarding Path

Two steps from zero to data:

**Step 1: Verify service is live (free)**

**Step 2: Make a paid request**

First call returns `402` with price. Sign payment. Re-send with `PAYMENT-SIGNATURE` header. Receive `200` with data + settlement proof.

Prerequisites: A Solana wallet with SOL (for tx fees) and USDC (for payments). Install `@x402/core`, `@x402/svm`, `@solana/kit`.

---

## Payment Protocol: x402 on Solana Mainnet

Every paid endpoint uses a two-step handshake. No API keys. No accounts. Payment IS authentication.

### Flow

### Important: Settle-After-Execute

If the query fails (timeout, server error), no payment is settled. The agent keeps their funds. This is enforced server-side. Only successful `2xx` responses trigger settlement.

### Headers

| Header | Direction | Description |
|--------|-----------|-------------|
| `PAYMENT-REQUIRED` | Response (402) | Encoded payment requirements |
| `X-PAYMENT-REQUIRED` | Response (402) | Duplicate of above for compatibility |
| `PAYMENT-SIGNATURE` | Request | Signed payment payload |
| `X-PAYMENT` | Request | Alternate payment header name |
| `PAYMENT-RESPONSE` | Response (200) | Settlement proof with tx hash |
| `X-PAYMENT-RESPONSE` | Response (200) | Duplicate of above for compatibility |

### Client Implementation (TypeScript/Bun)

```typescript
import { x402Client, x402HTTPClient } from "@x402/core/client";
import { registerExactSvmScheme } from "@x402/svm/exact/client";
import { toClientSvmSigner } from "@x402/svm";
import { getBase58Encoder, createKeyPairSignerFromBytes } from "@solana/kit";
import type { PaymentRequired, SettleResponse } from "@x402/core/types";

// --- One-time setup ---
const bytes = getBase58Encoder().encode(process.env.SOLANA_PRIVATE_KEY!);
const signer = await createKeyPairSignerFromBytes(bytes);
const client = new x402Client();
registerExactSvmScheme(client, { signer: toClientSvmSigner(signer) });
const httpClient = new x402HTTPClient(client);

// --- Reusable paid fetch ---
const BASE_URL = "https://agent.metengine.xyz";

async function paidFetch(
  path: string,
  options?: { method?: string; body?: Record<string, unknown> },
): Promise<{ data: unknown; settlement: SettleResponse; price: number }> {
  const method = options?.method ?? "GET";
  const url = `${BASE_URL}${path}`;
  const fetchOpts: RequestInit = { method };
  if (options?.body) {
    fetchOpts.headers = { "Content-Type": "application/json" };
    fetchOpts.body = JSON.stringify(options.body);
  }

  // Step 1: Get 402 with price
  const initial = await fetch(url, fetchOpts);
  if (initial.status !== 402) throw new Error(`Expected 402, got ${initial.status}`);
  const body = await initial.json();

  // Step 2: Parse payment requirements
  const paymentRequired: PaymentRequired = httpClient.getPaymentRequiredResponse(
    (name) => initial.headers.get(name), body,
  );
  const price = Number(paymentRequired.accepts[0]!.amount);

  // Step 3: Sign payment
  const paymentPayload = await httpClient.createPaymentPayload(paymentRequired);
  const paymentHeaders = httpClient.encodePaymentSignatureHeader(paymentPayload);

  // Step 4: Re-send with payment
  const paid = await fetch(url, {
    ...fetchOpts,
    headers: { ...fetchOpts.headers as Record<string, string>, ...paymentHeaders },
  });
  if (paid.status !== 200) {
    const err = await paid.json();
    throw new Error(`Payment failed (${paid.status}): ${JSON.stringify(err)}`);
  }
  const paidBody = (await paid.json()) as { data: unknown };

  // Step 5: Extract settlement proof
  const settlement = httpClient.getPaymentSettleResponse(
    (name) => paid.headers.get(name),
  );

  return { data: paidBody.data, settlement, price };
}

// GET endpoint
const { data, price } = await paidFetch("/api/v1/markets/trending?timeframe=24h&limit=5");
console.log(`Paid $${price} USDC. Got ${(data as any[]).length} markets.`);

// POST endpoint
const { data: intel } = await paidFetch("/api/v1/markets/intelligence", {
  method: "POST",
  body: { condition_id: "0xabc123...", top_n_wallets: 10 },
});

bun add @x402/core @x402/svm @solana/kit

GET https://agent.metengine.xyz/api/v1/pricing

{
  "data": [
    {
      "condition_id": "string",
      "question": "string",
      "category": "string",
      "period_volume_usdc": "number",
      "period_trade_count": "number",
      "volume_spike_multiplier": "number",
      "smart_money_wallets_active": "number",
      "smart_money_net_direction": "string",
      "buy_sell_ratio": "number",
      "leader_price": "number"
    }
  ]
}

{
  "data": [
    {
      "condition_id": "string",
      "question": "string",
      "category": "string",
      "end_date": "string (ISO 8601)",
      "status": "string",
      "total_volume_usdc": "number",
      "smart_money_outcome": "string | null",
      "smart_money_wallets": "number",
      "has_contrarian_signal": "boolean",
      "leader_price": "number"
    }
  ]
}

{
  "data": [
    {
      "name": "string",
      "active_markets": "number",
      "period_volume": "number",
      "period_trades": "number",
      "unique_traders": "number"
    }
  ]
}

{
  "data": {
    "timeframe": "string",
    "total_volume_usdc": "number",
    "total_trades": "number",
    "active_traders": "number",
    "active_markets": "number",
    "resolved_markets": "number",
    "smart_wallet_count": "number",
    "avg_trade_size_usdc": "number"
  }
}

{
  "data": {
    "condition_id": "string",
    "question": "string",
    "category": "string",
    "end_date": "string",
    "outcomes": "object",
    "smart_money": {
      "consensus_outcome": "string",
      "consensus_strength": "number",
      "by_outcome": {
        "<outcome_name>": {
          "wallet_count": "number",
          "total_usdc": "number",
          "percentage": "number",
          "top_wallets": [
            {
              "wallet": "string",
              "score": "number",
              "tags": ["string"],
              "usdc_invested": "number",
              "net_position": "number",
              "avg_buy_price": "number"
            }
          ]
        }
      }
    },
    "dumb_money": {
      "consensus_outcome": "string",
      "contrarian_to_smart": "boolean",
      "by_outcome": "object"
    },
    "signal_analysis": {
      "smart_vs_price_aligned": "boolean",
      "contrarian_signal": "boolean",
      "signal_summary": "string"
    },
    "recent_activity": {
      "volume_24h": "number",
      "trade_count_24h": "number",
      "buy_sell_ratio": "number",
      "volume_trend": "string"
    }
  }
}

{
  "data": {
    "condition_id": "string",
    "question": "string",
    "category": "string",
    "candles_by_outcome": {
      "<outcome_name>": [
        {
          "bucket": "string (ISO 8601)",
          "token_id": "string",
          "outcome": "string",
          "open": "number",
          "high": "number",
          "low": "number",
          "close": "number",
          "volume": "number",
          "trade_count": "number",
          "vwap": "number"
        }
      ]
    }
  }
}

{
  "data": {
    "condition_id": "string",
    "question": "string",
    "overall_sentiment": "object",
    "by_outcome": "object",
    "time_series": "array",
    "momentum": "object"
  }
}

{
  "data": {
    "condition_id": "string",
    "question": "string",
    "total_wallets": "number",
    "total_usdc": "number",
    "by_outcome": "object",
    "tier_distribution": "object"
  }
}

{
  "data": {
    "condition_id": "string",
    "question": "string",
    "category": "string",
    "insiders": [
      {
        "wallet": "string",
        "insider_score": "number",
        "signals": "object",
        "outcome": "string",
        "net_shares": "number",
        "buy_usdc": "number",
        "wallet_age_days": "number",
        "first_trade_timestamp": "string"
      }
    ],
    "summary": "object"
  }
}

{
  "data": {
    "condition_id": "string",
    "question": "string",
    "category": "string",
    "trade_count": "number",
    "total_volume": "number",
    "trades": [
      {
        "tx_hash": "string",
        "wallet": "string",
        "token_id": "string",
        "outcome": "string",
        "side": "string",
        "price": "number",
        "size": "number",
        "usdc_size": "number",
        "timestamp": "string",
        "wallet_score": "number",
        "wallet_tags": ["string"]
      }
    ]
  }
}

{
  "data": [
    {
      "condition_id": "string",
      "question": "string",
      "category": "string",
      "shared_wallet_count": "number",
      "wallet_overlap_pct": "number",
      "total_volume_usdc": "number"
    }
  ]
}

{
  "data": [
    {
      "condition_id": "string",
      "question": "string",
      "category": "string",
      "smart_money_favors": "string",
      "smart_money_percentage": "number",
      "smart_wallet_count": "number",
      "avg_smart_score": "number",
      "price_signal_gap": "number",
      "signal_direction": "string",
      "signal_strength": "string",
      "leader_price": "number",
      "time_until_close": "string"
    }
  ]
}

{
  "data": [
    {
      "condition_id": "string",
      "question": "string",
      "category": "string",
      "smart_wallet_count": "number",
      "avg_smart_score": "number",
      "total_smart_usdc": "number",
      "conviction_score": "number",
      "favored_outcome": "string",
      "favored_outcome_percentage": "number",
      "entry_vs_current_gap": "number"
    }
  ]
}

{
  "data": {
    "timeframe": "string",
    "total_net_flow": "number",
    "categories": [
      {
        "category": "string",
        "current_buy_volume": "number",
        "current_sell_volume": "number",
        "current_net_flow": "number",
        "previous_buy_volume": "number",
        "previous_sell_volume": "number",
        "previous_net_flow": "number",
        "net_flow_change": "number",
        "flow_trend": "string"
      }
    ],
    "biggest_inflow": "string",
    "biggest_outflow": "string"
  }
}

{
  "data": [
    {
      "tx_hash": "string",
      "wallet": "string",
      "condition_id": "string",
      "token_id": "string",
      "question": "string",
      "outcome": "string",
      "category": "string",
      "side": "string",
      "price": "number",
      "size": "number",
      "usdc_size": "number",
      "timestamp": "string",
      "wallet_score": "number",
      "win_rate": "number",
      "wallet_tags": ["string"]
    }
  ]
}

{
  "data": {
    "total_volume": "number",
    "total_trades": "number",
    "breakdown": [
      {
        "label": "string",
        "volume": "number",
        "trade_count": "number",
        "pct_of_total": "number",
        "volume_change_pct": "number",
        "trend": "string"
      }
    ],
    "biggest_gainer": "string",
    "biggest_loser": "string"
  }
}

{
  "data": {
    "wallet": "string",
    "profile": {
      "score": "number",
      "sharpe": "number",
      "win_rate": "number",
      "total_pnl": "number",
      "total_volume": "number",
      "resolved_positions": "number",
      "tags": ["string"],
      "tier": "string",
      "primary_category": "string",
      "is_specialist": "boolean"
    },
    "category_breakdown": "array",
    "active_positions": "array",
    "recent_trades": "array"
  }
}

{
  "data": {
    "wallet": "string",
    "wallet_score": "number",
    "wallet_tags": ["string"],
    "period_summary": "object",
    "trades": "array"
  }
}

{
  "data": {
    "wallet": "string",
    "total_realized_pnl": "number",
    "total_positions": "number",
    "winning_positions": "number",
    "losing_positions": "number",
    "best_trade": "object",
    "worst_trade": "object",
    "positions": "array"
  }
}

{
  "data": {
    "wallets": "array of wallet profiles",
    "comparison_winners": "object",
    "category_overlap": "object",
    "shared_positions": "array"
  }
}

{
  "data": [
    {
      "wallet": "string",
      "overlap_trades": "number",
      "avg_lag_seconds": "number",
      "copied_tokens": "array",
      "wallet_score": "number"
    }
  ]
}

{
  "data": [
    {
      "rank": "number",
      "wallet": "string",
      "period_pnl_usdc": "number",
      "period_roi_percent": "number",
      "period_trades": "number",
      "period_win_rate": "number",
      "overall_score": "number",
      "sharpe_ratio": "number",
      "primary_category": "string",
      "tags": ["string"],
      "active_positions_count": "number"
    }
  ]
}

{
  "data": [
    {
      "wallet": "string",
      "category_sharpe": "number",
      "category_win_rate": "number",
      "category_volume": "number",
      "category_pnl": "number",
      "category_positions": "number",
      "is_specialist": "boolean",
      "volume_concentration": "number",
      "overall_score": "number",
      "tags": ["string"]
    }
  ]
}

{
  "data": [
    {
      "condition_id": "string",
      "question": "string",
      "category": "string",
      "winning_outcome": "string",
      "end_date": "string",
      "total_volume_usdc": "number",
      "smart_money_correct": "number",
      "smart_money_wrong": "number",
      "smart_money_accuracy": "number"
    }
  ]
}

{
  "data": [
    {
      "wallet": "string",
      "market_question": "string",
      "condition_id": "string",
      "entry_date": "string",
      "days_before_resolution": "number",
      "bet_size_usdc": "number",
      "winning_outcome": "string",
      "wallet_score": "number",
      "win_rate": "number"
    }
  ]
}

{
  "data": {
    "condition_id": "string",
    "question": "string",
    "category": "string",
    "summary": {
      "total_wallets": "number",
      "total_usdc": "number",
      "avg_score": "number",
      "consensus_outcome": "string"
    },
    "positions": "array"
  }
}

{
  "data": {
    "candidates": [
      {
        "wallet": "string",
        "insider_score": "number",
        "wallet_age_days": "number",
        "first_trade": "string",
        "markets_traded": "number",
        "total_buy_usdc": "number",
        "category_count": "number",
        "categories": ["string"],
        "win_count": "number",
        "total_resolved": "number",
        "win_rate": "number",
        "signals": "object"
      }
    ],
    "total_candidates": "number"
  }
}

{
  "data": {
    "total_volume_usd": "number",
    "total_trades": "number",
    "active_traders": "number",
    "smart_wallet_count": "number",
    "unique_coins": "number"
  }
}

{
  "data": [
    {
      "coin": "string",
      "volume_usd": "number",
      "trade_count": "number",
      "unique_traders": "number",
      "long_short_ratio": "number",
      "smart_wallet_count": "number",
      "volume_change_pct": "number"
    }
  ]
}

{
  "data": [
    {
      "coin": "string",
      "volume_usd": "number",
      "trade_count": "number",
      "unique_traders": "number"
    }
  ]
}

{
  "data": [
    {
      "coin": "string",
      "bucket": "string",
      "volume_usd": "number",
      "trade_count": "number",
      "smart_volume_usd": "number"
    }
  ]
}

{
  "data": [
    {
      "trader": "string",
      "total_pnl": "number",
      "total_volume": "number",
      "total_trades": "number",
      "winning_trades": "number",
      "win_rate": "number",
      "roi_pct": "number",
      "smart_score": "number"
    }
  ]
}

{
  "data": {
    "trader": "string",
    "stats": "object",
    "coin_breakdown": "array",
    "daily_pnl": "array",
    "recent_trades": "array"
  }
}

{
  "data": {
    "traders": "array of trader profiles",
    "shared_coins": "array",
    "comparison_winners": "object"
  }
}

{
  "data": [
    {
      "date": "string",
      "pnl": "number",
      "volume": "number",
      "trades": "number",
      "cumulative_pnl": "number",
      "streak": "number"
    }
  ]
}

{
  "data": [
    {
      "coin": "string",
      "pnl": "number",
      "volume": "number",
      "trades": "number",
      "winning_trades": "number",
      "win_rate": "number"
    }
  ]
}

{
  "data": [
    {
      "trader": "string",
      "first_trade": "string",
      "wallet_age_days": "number",
      "total_pnl": "number",
      "total_volume": "number",
      "total_trades": "number",
      "winning_trades": "number"
    }
  ]
}

{
  "data": [
    {
      "trader": "string",
      "coin": "string",
      "side": "string",
      "direction": "string",
      "price": "number",
      "size": "number",
      "usd_value": "number",
      "closed_pnl": "number",
      "timestamp": "string",
      "smart_score": "number"
    }
  ]
}

{
  "data": [
    {
      "trader": "string",
      "coin": "string",
      "side": "string",
      "direction": "string",
      "price": "number",
      "size": "number",
      "usd_value": "number",
      "closed_pnl": "number",
      "timestamp": "string"
    }
  ]
}

{
  "data": [
    {
      "bucket": "string",
      "long_volume": "number",
      "short_volume": "number",
      "long_short_ratio": "number",
      "smart_long_volume": "number",
      "smart_short_volume": "number",
      "smart_long_short_ratio": "number"
    }
  ]
}

{
  "data": [
    {
      "trader": "string",
      "score": "number",
      "total_pnl": "number",
      "total_volume": "number",
      "total_trades": "number",
      "win_rate": "number"
    }
  ]
}