Graph Advocate

Ask any blockchain data question in plain English. Get back live data — not just a recommendation.

Routing

Match the user's intent to the right service. Load only the reference you need.

Polymarket routing rule: Prefer token-api for common queries (markets, OHLCV, activity, user positions, P&L, platform stats). Only route to graph-polymarket-mcp for advanced queries: live orderbook depth, live spreads, disputed markets, UMA resolution, trader winrate/drawdown/profit factor, CTF splits/merges/redemptions.

If the request spans two services, use both and combine results.

Quick Examples

"Top 10 USDC holders on Ethereum"           → token-api
"Best subgraph for Uniswap V3 on Arbitrum?" → subgraph-registry
"Aave V3 liquidations above $50K"           → graph-aave-mcp
"Hottest Polymarket markets"                → token-api (/v1/polymarket/markets)
"Polymarket OHLCV for Bitcoin market"       → token-api (/v1/polymarket/markets/ohlc)
"Polymarket trader P&L for 0x..."           → token-api (/v1/polymarket/users/positions)
"Polymarket live orderbook depth"           → graph-polymarket-mcp (advanced)
"Polymarket trader winrate/drawdown"        → graph-polymarket-mcp (subgraph P&L stats)
"Score Hyperliquid trader 0x..."            → /hyperliquid/score (paid)
"Hyperliquid top traders for HYPE"          → /hyperliquid/screen (paid)
"Evaluate Hyperliquid vault 0x..."          → /hyperliquid/vault (paid)
"Compare Aave vs Compound TVL"              → graph-lending-mcp
"x402 payment volume on Base today"         → x402-analytics
"Top 10 x402 recipients in the last 30 days" → /ask (paid, NL→SQL)
"When did x402 volume on Base inflect?"     → /ask (paid, NL→SQL)
"Has 0x0FF5A6… ever been paid via x402?"     → /onchain-x402/address (paid, decentralized)
"Polymarket vs Limitless spread on 'trump'"  → /predmarket/spread (paid, cross-venue JOIN)
"Kalshi vs Polymarket fed-rate arbitrage"    → /kalshi-polymarket/spread (paid)
"Find agents that do trading"               → 8004scan

How It Works

1. Agent sends plain-English question
2. Graph Advocate identifies the best service
3. Searches the subgraph registry (15,500+ subgraphs with query hints)
4. Executes the query and returns live data in the response
5. Includes get_started link for agents to get their own free API key

Response Format

{
  "recommendation": "subgraph-registry",
  "reason": "why this service fits",
  "confidence": "high",
  "query_ready": { "tool": "...", "args": {...} },
  "execution_result": { "source": "subgraph-gateway", "data": {...} },
  "get_started": "Free API key: https://thegraph.com/studio/",
  "cache_for_seconds": 86400
}

Endpoints

Default mode: no wallet, free tier

This skill is fully functional with no wallet attached. The default routing —
plain-English question in, JSON recommendation + live data out — runs against the
free tier and never asks for funds. Agents that don't expose an x402-enabled
runtime simply never see a payment challenge.

If you're evaluating Graph Advocate for the first time, start without a wallet,
use the free tier, and decide later whether the paid endpoints are worth opting
into.

Optional paid mode (opt-in)

Some endpoints settle in USDC on Base via the x402 protocol. Paid mode is
opt-in: it only activates when your agent runtime is configured to accept
x402 payment challenges. Without that configuration, paid endpoints return
402 Payment Required and the call stops there — no funds move.

Pricing

• /route — 3 free queries/sender/day, then $0.01 USDC per call (Base mainnet)
• /polymarket/* — paid from call 1 ($0.01 - $0.05 per call)
• /hyperliquid/* — paid from call 1 ($0.02 - $0.10 per call)
• /predmarket/spread — paid from call 1 ($0.05 USDC) — Polymarket ↔ Limitless cross-venue spread on a topic. POST {topic, limit?} returns per-pair yes-mid spread (bps) and arbitrage direction. JOIN that single-venue passthroughs structurally can't return.
• /kalshi-polymarket/spread — paid from call 1 ($0.05 USDC) — Kalshi ↔ Polymarket cross-source spread on a topic.
• /kalshi/consensus-trend, /kalshi/sports-live-edge — paid from call 1 ($0.05 USDC each).
• /ask — paid from call 1 ($0.05 USDC) — natural-language Q&A over the x402 Base settlements warehouse. 132M+ payments + pre-aggregated daily_stats (388 days). Returns {answer, sql_trace, model, upstream_ms} so callers can verify the data path.
• /onchain-x402/address — paid from call 1 ($0.01 USDC) — decentralized address lookup against the x402 Base subgraph on The Graph Network. POST {address} returns lifetime stats (payer + recipient roles), recent 10 payments in each direction, facilitator metadata, and indexed_through_block for freshness.

402 challenge — preview before paying

Every paid endpoint's 402 response body includes an output_example field with a sample of the payload you'll receive after paying. Inspect this before signing — if the shape doesn't fit your use case, bail without spending.

Per-call approval (recommended)

Every paid call is preceded by an HTTP 402 challenge that names the price,
the recipient address, and the settlement network:

HTTP/1.1 402 Payment Required
X-Payment: { "amount": "0.01", "currency": "USDC", "network": "base",
             "recipient": "0x0FF5A6ec…7C86", "challenge": "<nonce>" }

The 402 challenge is the per-call approval surface. Configure your runtime
to surface 402 challenges to the user before any payment is signed — most
x402 clients accept an interactive-approval flag (e.g. confirmBeforePay).
With per-call approval enabled, you see the exact price and recipient on every
paid request and decide yes/no per call. This is the recommended posture for
any wallet that holds more than a trivial amount.

If you instead configure your runtime to accept 402 challenges automatically,
paid calls settle without an interactive prompt. That is a runtime-level choice,
not a property of this skill — and if you choose it, the spend controls below
become load-bearing.

Free-quota visibility (no-charge)

Before any paid call, check today's remaining free-tier quota:

GET https://graphadvocate.com/quota?sender=0x<your-agent-address>

Returns:

{
  "sender": "0x…",
  "free_quota_daily": 3,
  "used_today": 1,
  "remaining_today": 2,
  "free_tier_exhausted": false,
  "next_call_paid": false,
  "price_usdc_per_paid_call": 0.01
}

/quota is a no-charge metadata route. Use it to:

1. Display "N free queries remaining today" in your UI before the agent runs.
2. Halt autonomous loops when remaining_today hits 0 instead of accepting
   the 402 challenge.
3. Audit per-sender spend by polling daily.

Required spend controls before autonomous use

1. Dedicated low-balance wallet. Fund only what you're willing to spend
   in a session (e.g. $5 USDC). Never connect a wallet that holds your treasury.
2. Spend caps in your agent runtime. Most x402 clients accept
   maxAmountPerCall and maxTotalSpend parameters. If yours does not, wrap
   calls to this skill in a counter that breaks after N invocations.
3. Stop conditions. Add at least one of:
   - Hard cap on call count per task (e.g. max_calls_per_run = 5)
   - Time bound on the task (e.g. abort after 5 minutes)
   - Cost ceiling check before each call (read wallet USDC balance; halt if below threshold)
4. First-run probe mode. Treat the first execution as a probe — log every
   call, inspect spend, then enable autonomous mode only after confirming the
   per-task cost matches expectations.

Receipts and no-charge surface

• Every paid call returns an x-payment-response header with the on-chain
  settlement reference. Log it. If a call doesn't return that header but charged
  your wallet, file an issue — the contract is "no settlement, no charge."
• No-charge endpoints never trigger payment: /.well-known/agent-card.json,
  /agents/capabilities.json, /mcp/catalog, /llms.txt, /dashboard,
  /chat, /quota, GET /.

Payments are received by Ampersend smart account 0x0FF5A6ecef783BBA35463ec2F8403B9B5e9e7C86.

External Endpoints

Security & Privacy

• Instruction-only skill — no code is downloaded or executed on your machine
• No credentials required — Graph Advocate does not need API keys from you
• No local file access — reads nothing from your filesystem
• Stateless — no session data persists between requests

Identity

• ERC-8004: Agent #734 (Arbitrum), #41,034 (Base)
• ENS: graphadvocate.eth
• Ampersend: app.ampersend.ai/discover/agent/8453:41034

Trust Statement

By using this skill, your plain-English data queries are sent to graphadvocate.com (hosted on Railway, operated by @paulieb14). The service returns structured JSON with live data. Queries may include wallet addresses and protocol/trading intent — do not send sensitive private context (private keys, seed phrases, internal strategy details) and only install if you trust this endpoint operator.

Paid mode is opt-in. This skill never requests credentials from you. Paid
endpoints only settle when your agent runtime is configured to accept x402
payment challenges. Configure interactive approval if you want a per-call
y/N prompt, and always use a low-balance wallet — see the "Optional paid mode"
section above for the recommended posture and spend controls.

Links

• GitHub: https://github.com/PaulieB14/graph-advocate
• The Graph: https://thegraph.com
• Subgraph Studio: https://thegraph.com/studio