MetEngine Data Agent API

Real-time smart money analytics across Polymarket, Hyperliquid, and Meteora. 63 endpoints covering wallet scoring, insider detection, capital flow tracking, and position analysis. Pay per request with USDC on Solana -- no API keys, no accounts, no onboarding friction.

---

Display Rules

• NEVER truncate or trim wallet/contract addresses. Always show full addresses (e.g. 0x61276aba49117fd9299707d5d573652949d5c977, not 0x6127...c977).
• This applies to all Polymarket (0x hex), Hyperliquid (0x hex), Meteora (base58), condition_ids, token_ids, pool addresses, position addresses, and transaction hashes.

---

Skill Auto-Update

This skill file may change as new endpoints are added or pricing updates. Keep it fresh by downloading the latest version weekly.

Download the latest skill file:

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

Automate weekly updates (cron):

# 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

Check skill version before querying (optional):

# 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

Agents SHOULD check for updates at the start of a new session if more than 7 days have passed since the last update.

---

Session Memory (CRITICAL -- Read This First)

Before making ANY API call, check for a memory file at:

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

This file persists across sessions and stores everything needed to skip setup and make faster queries. If the memory file exists, read it first. It will tell you:

1. Wallet configuration -- path to the Solana keypair, public address, whether SOL/USDC balances were verified
2. Package status -- whether @x402/core, @x402/svm, @solana/kit are already installed and where
3. Client bootstrap -- a working code snippet from the last successful query (copy-paste ready)
4. Endpoint learnings -- which endpoints worked, which timed out, which fallbacks were used
5. Pricing cache -- last-fetched pricing schedule (avoids re-reading the full pricing section)

Memory File Format

Create or update ~/.claude/agents/metengine-memory.md using this template:

# 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>

Endpoint History

Date	Endpoint	Status	Latency	USDC Cost	Notes

Fallbacks Learned

Endpoint	Issue	Fallback Used

Quirks Encountered

### 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:

1. Read memory file
2. If wallet and packages are set up: a. Copy the Client Bootstrap code b. Check Fallbacks Learned for the endpoint you need c. Make the API call directly d. Update Endpoint History
3. If wallet or packages NOT set up: a. Follow the Onboarding Path below b. Update memory file after setup

**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)**

GET https://agent.metengine.xyz/health

**Step 2: Make a paid request**

GET https://agent.metengine.xyz/api/v1/markets/trending?timeframe=24h&limit=5

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

Agent MetEngine Solana | | | |-- GET /api/v1/endpoint ------>| | |<-- 402 + PaymentRequired -----| | | | | | [sign payment locally] | | | | | |-- GET + PAYMENT-SIGNATURE --->| | | |-- verify ------------------>| | |<-- valid -------------------| | | | | | [execute query] | | | | | |-- settle ------------------>| | |<-- tx hash -----------------| |<-- 200 + data + PAYMENT- -----| | | RESPONSE (settlement) | |

### 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 };
}

Usage Examples

// 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 },
});

NPM Dependencies

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

---

Pricing

All prices are in USDC on Solana Mainnet. Pricing is dynamic based on endpoint tier, timeframe, limit, and filter usage.

Tier Base Costs

Tier	Base Cost (USDC)	Description
light	$0.01	Simple lookups, searches, feeds
medium	$0.02	Aggregated analytics, trending data
heavy	$0.05	Computed intelligence, leaderboards, scoring
whale	$0.08	Multi-entity comparisons, complex scans

Price Modifiers

Timeframe multiplier (applied to base cost):

Timeframe	Multiplier
1h	0.5x
4h	0.7x
12h	0.9x
24h / today	1.0x
7d	2.0x
30d	3.0x
90d	4.0x
365d / all	5.0x

Limit multiplier: price *= max(1, requested_limit / default_limit)

Filter discounts (reduce scan cost):

Filter	Discount	Applicable Endpoints
category	0.7x	trending, top-performers, whales, capital-flow, high-conviction, opportunities
condition_id	0.5x	whales, sentiment, participants, wallet activity
smart_money_only=true	0.7x	whales, capital-flow, volume-heatmap (Polymarket + HL)
coin/coins	0.7x	HL whales, long-short-ratio, pressure/pairs
pool_type (not "all")	0.7x	All Meteora endpoints with pool_type param
pool_address	0.5x	pool detail, volume-history, events, fee-analysis, positions/active

Special rules:

• wallets/compare: price *= wallets.length / 2
• hl/traders/compare: price *= traders.length / 2
• meteora/lps/compare: price *= owners.length / 2
• wallets/profile: both includes=1.0x, one include=0.7x, neither=0.4x
• wallets/top-performers without category: 2.0x penalty

Hard caps:

• /api/v1/markets/opportunities: max $0.15
• /api/v1/wallets/copy-traders: max $0.12

Global bounds: Floor $0.01, Ceiling $0.20 per request.

Machine-Readable Pricing

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

Returns the full pricing schedule as JSON including all tiers, routes, multipliers, discounts, and special rules. Free endpoint. No payment required.

---

Capability Manifest

Polymarket (27 endpoints)

#	Method	Path	Tier	Description
1	GET	/api/v1/markets/trending	medium	Trending markets with volume spikes
2	GET	/api/v1/markets/search	light	Search markets by keyword, category, status, or Polymarket URL
3	GET	/api/v1/markets/categories	light	All categories with activity stats
4	GET	/api/v1/platform/stats	light	Platform-wide aggregate stats
5	POST	/api/v1/markets/intelligence	heavy	Full smart money intelligence report for a market
6	GET	/api/v1/markets/price-history	light	OHLCV price/probability time series
7	POST	/api/v1/markets/sentiment	medium	Sentiment time series with smart money overlay
8	POST	/api/v1/markets/participants	medium	Participant summary by scoring tier
9	POST	/api/v1/markets/insiders	heavy	Insider pattern detection (7-signal behavioral scoring)
10	GET	/api/v1/markets/trades	light	Chronological trade feed for a market
11	GET	/api/v1/markets/similar	whale	Related markets by wallet overlap
12	GET	/api/v1/markets/opportunities	whale	Markets where smart money disagrees with price
13	GET	/api/v1/markets/high-conviction	heavy	High-conviction smart money bets
14	GET	/api/v1/markets/capital-flow	medium	Capital flow by category (sector rotation)
15	GET	/api/v1/trades/whales	medium	Large whale trades
16	GET	/api/v1/markets/volume-heatmap	medium	Volume distribution across categories/hours/days
17	POST	/api/v1/wallets/profile	heavy	Full wallet dossier with score, positions, trades
18	POST	/api/v1/wallets/activity	medium	Recent trading activity for a wallet
19	POST	/api/v1/wallets/pnl-breakdown	medium	Per-market PnL breakdown
20	POST	/api/v1/wallets/compare	whale	Compare 2-5 wallets side-by-side
21	POST	/api/v1/wallets/copy-traders	whale	Detect wallets copying a target wallet
22	GET	/api/v1/wallets/top-performers	heavy	Leaderboard by PnL, ROI, Sharpe, win rate, volume
23	GET	/api/v1/wallets/niche-experts	heavy	Top wallets in a specific category
24	GET	/api/v1/markets/resolutions	light	Resolved markets with smart money accuracy
25	GET	/api/v1/wallets/alpha-callers	heavy	Wallets that trade early on later-trending markets
26	GET	/api/v1/markets/dumb-money	medium	Low-score trader positions (contrarian indicator)
27	GET	/api/v1/wallets/insiders	heavy	Global insider candidates by behavioral score

Hyperliquid (18 endpoints)

#	Method	Path	Tier	Description
28	GET	/api/v1/hl/platform/stats	light	Platform aggregate stats
29	GET	/api/v1/hl/coins/trending	medium	Trending coins by activity
30	GET	/api/v1/hl/coins/list	light	All traded coins with 7d stats
31	GET	/api/v1/hl/coins/volume-heatmap	medium	Volume by coin and hour
32	GET	/api/v1/hl/traders/leaderboard	heavy	Ranked trader leaderboard
33	POST	/api/v1/hl/traders/profile	heavy	Full trader dossier
34	POST	/api/v1/hl/traders/compare	whale	Compare 2-5 traders
35	GET	/api/v1/hl/traders/daily-pnl	medium	Daily PnL time series with streaks
36	POST	/api/v1/hl/traders/pnl-by-coin	medium	Per-coin PnL breakdown (closed PnL only)
37	GET	/api/v1/hl/traders/fresh-whales	heavy	New high-volume wallets
38	GET	/api/v1/hl/trades/whales	medium	Large trades
39	GET	/api/v1/hl/trades/feed	light	Chronological trade feed for a coin
40	GET	/api/v1/hl/trades/long-short-ratio	medium	Long/short volume ratio time series
41	GET	/api/v1/hl/smart-wallets/list	light	Smart wallet list with scores
42	GET	/api/v1/hl/smart-wallets/activity	medium	Smart wallet recent trades
43	GET	/api/v1/hl/smart-wallets/signals	heavy	Aggregated directional signals by coin
44	GET	/api/v1/hl/pressure/pairs	heavy	Long/short pressure with smart positions
45	GET	/api/v1/hl/pressure/summary	medium	Pressure summary across all coins

Meteora (18 endpoints)

#	Method	Path	Tier	Description
46	GET	/api/v1/meteora/pools/trending	medium	Trending pools by volume spike
47	GET	/api/v1/meteora/pools/top	medium	Top pools by volume, fees, or LP count
48	GET	/api/v1/meteora/pools/search	light	Search pools by address or token name
49	GET	/api/v1/meteora/pools/detail	medium	Full pool detail
50	GET	/api/v1/meteora/pools/volume-history	light	Volume time series
51	GET	/api/v1/meteora/pools/events	light	Chronological event feed
52	GET	/api/v1/meteora/pools/fee-analysis	medium	Fee claiming analysis
53	GET	/api/v1/meteora/lps/top	heavy	Top LPs leaderboard
54	POST	/api/v1/meteora/lps/profile	heavy	Full LP dossier
55	GET	/api/v1/meteora/lps/whales	medium	Large LP events
56	POST	/api/v1/meteora/lps/compare	whale	Compare 2-5 LPs
57	GET	/api/v1/meteora/positions/active	medium	Active LP positions
58	GET	/api/v1/meteora/positions/history	light	Position event history (DLMM only)
59	GET	/api/v1/meteora/platform/stats	light	Platform-wide stats
60	GET	/api/v1/meteora/platform/volume-heatmap	medium	Volume by action/hour
61	GET	/api/v1/meteora/platform/metengine-share	light	MetEngine routing share
62	GET	/api/v1/meteora/dca/pressure	medium	DCA accumulation pressure by token
63	GET	/api/v1/meteora/pools/smart-wallet	heavy	Pools with highest smart wallet LP activity

---

Complete Endpoint Reference

Response Envelope

All 200 responses use the format: { "data": <payload> }

All error responses use: { "error": "<message>" } with optional "reason" field.

---

POLYMARKET

1. GET /api/v1/markets/trending

Trending markets with volume spikes.

Parameters (query string):

Param	Type	Default	Values	Required
timeframe	string	24h	1h, 4h, 12h, 24h, 7d	no
category	string	-	any valid category	no
sort_by	string	volume_spike	volume_spike, trade_count, smart_money_inflow	no
limit	integer	20	1-100	no

Response schema:

{
  "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"
    }
  ]
}

2. GET /api/v1/markets/search

Search markets by keyword, category, status. Accepts Polymarket URLs as the query param.

Parameters (query string):

Param	Type	Default	Values	Required
query	string	-	keyword or Polymarket URL	no
category	string	-	any valid category	no
status	string	active	active, closing_soon, resolved	no
has_smart_money_signal	boolean	-	true, false	no
sort_by	string	relevance	end_date, volume, relevance	no
limit	integer	20	1-100	no

Response schema:

{
  "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"
    }
  ]
}

3. GET /api/v1/markets/categories

List all categories with activity stats.

Parameters (query string):

Param	Type	Default	Values	Required
include_stats	boolean	true	true, false	no
timeframe	string	24h	24h, 7d	no

Response schema:

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

4. GET /api/v1/platform/stats

Platform-wide aggregate stats.

Parameters (query string):

Param	Type	Default	Values	Required
timeframe	string	24h	24h, 7d, 30d	no

Response schema:

{
  "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"
  }
}

5. POST /api/v1/markets/intelligence

Full smart money intelligence report on a specific market.

Request body (JSON):

Field	Type	Default	Values	Required
condition_id	string	-	-	yes
top_n_wallets	integer	10	1-50	no

Response schema:

{
  "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"
    }
  }
}