| name | surf |
| description | Use when the user wants crypto data — token prices, on-chain SQL, prediction-market positions, CEX order books, wallet labels/net-worth, social mindshare, news, or unified search. 83 endpoints across exchange, on-chain, wallet, social, prediction, news and search — one API, flat $0.0085/call in USDC via x402. Settles directly to Surf's Base treasury; no Surf account needed. |
| triggers | ["surf","asksurf","crypto data","on-chain sql","clickhouse crypto","wallet labels","wallet net worth","smart followers","ct mindshare","social mindshare","kol search","fear and greed","etf flows","funding rate","long short ratio","liquidation chart","tokenomics unlock","vc fund portfolio","defi protocol metrics","bridge ranking","yield ranking","airdrop search","options skew","perp snapshot","gas price","polymarket data","kalshi data"] |
Surf — Crypto Data via BlockRun
Surf (asksurf.ai) aggregates 83 crypto data endpoints across CEX market data, on-chain SQL (13 chains, 80+ ClickHouse tables), 100M+ labeled wallets, prediction markets (Polymarket + Kalshi side-by-side), social/CT intelligence, news and unified search.
BlockRun is Surf's x402 payment rail — every call settles directly to Surf's Base treasury. You hold the wallet, BlockRun holds the Surf key, Surf holds the data. No Surf account, no API key, no monthly minimum.
How to Call from MCP
One tool, three params. The MCP tool auto-routes method (POST when body is set, GET otherwise) and auto-validates required params before settling:
blockrun_surf({ path: "market/price", params: { symbol: "BTC" } })
blockrun_surf({ path: "onchain/sql", body: {
sql: "SELECT token_address, count() FROM ethereum.dex_trades WHERE block_time > now() - INTERVAL 1 DAY GROUP BY 1 ORDER BY 2 DESC LIMIT 10"
}})
blockrun_surf({ path: "wallet/labels/batch", params: { addresses: "0xabc,0xdef" } })
Pricing — one flat rate
$0.0085 per call. Every endpoint, no tiers, including raw on-chain SQL.
Verified against the gateway's own payment-required header, which is free to request — send any call with no payment header and it quotes the exact charge. All of market/price, wallet/labels/batch, social/mindshare, news/feed, exchange/klines, search/web and onchain/sql return the same $0.0085 (SURF_TIER_1/2/3_PRICE are all identical upstream).
Ignore any "premium tier" pricing you may have seen — SQL used to cost more and no longer does.
Wrong / missing required params return HTTP 400 without charging — pre-validation runs before settlement.
Do NOT use Surf for prediction markets
Surf carries 17 prediction-market/* endpoints (Polymarket + Kalshi). Use blockrun_markets (Predexon) instead — same data, same price, and far deeper.
Predexon used to be 7.5× cheaper; since 2026-07-15 both bill the same flat rate, so the choice is now purely about coverage — and Predexon still wins on coverage by a wide margin.
| Predexon (blockrun_markets) | Surf |
|---|
| Polymarket / Kalshi markets | $0.0085 | $0.0085 (same) |
| Wallet clustering, smart money, leaderboards | ✅ | ❌ none |
| Limitless, Opinion, Predict.Fun, sports, UMA | ✅ | ❌ Polymarket + Kalshi only |
The only Surf prediction-market endpoint with no Predexon equivalent is prediction-market/category-metrics. Everything else is a strictly worse buy. See skills/prediction-markets/SKILL.md.
Reach for Surf when Predexon cannot answer it: on-chain SQL, 100M+ wallet labels across 13 chains, 16 CEXs, social/CT intelligence, news, tokenomics/unlocks, liquidations, ETF flows, VC portfolios. Predexon has none of those.
Quick Decision Table — "User asks about X"
| User wants… | Method | Path | Required |
|---|
| BTC/ETH price | GET | market/price | symbol |
| ETF flow history | GET | market/etf | symbol |
| Fear & Greed index | GET | market/fear-greed | – |
| Top 100 tokens by market cap | GET | market/ranking | – |
| Options skew / IV / volume | GET | market/options | symbol |
| CEX ticker for a pair | GET | exchange/price | pair |
| Perp snapshot (funding + OI) | GET | exchange/perp | pair |
| Order book depth | GET | exchange/depth | pair |
| OHLCV candles | GET | exchange/klines | pair |
| Funding rate history | GET | exchange/funding-history | pair |
| Long/short ratio | GET | exchange/long-short-ratio | pair |
| Bridge protocols by volume | GET | onchain/bridge/ranking | – |
| Yield pool ranking | GET | onchain/yield/ranking | – |
| Current gas price (per chain) | GET | onchain/gas-price | chain |
| Transaction details | GET | onchain/tx | hash, chain |
| Raw on-chain SQL |
Worked Examples
1. "What's BTC trading at?"
blockrun_surf({ path: "market/price", params: { symbol: "BTC" } })
Cost: $0.0085. Returns price history; latest point = current price.
2. "Top 10 tokens by DEX volume on Ethereum in the last 24h"
blockrun_surf({
path: "onchain/sql",
body: {
sql: `
SELECT token_address, sum(amount_usd) AS volume_usd
FROM ethereum.dex_trades
WHERE block_time > now() - INTERVAL 1 DAY
GROUP BY token_address
ORDER BY volume_usd DESC
LIMIT 10
`
}
})
Cost: $0.0085. Raw ClickHouse — same query language Surf's own UI uses, at the same flat rate as any other Surf read.
3. "Is this whale wallet labeled? What does it hold?"
blockrun_surf({ path: "wallet/labels/batch", params: { addresses: "0xabc...,0xdef..." } })
blockrun_surf({ path: "wallet/detail", params: { address: "0xabc..." } })
blockrun_surf({ path: "wallet/protocols", params: { address: "0xabc..." } })
blockrun_surf({ path: "wallet/net-worth", params: { address: "0xabc..." } })
Cost: 4 × $0.0085 = $0.034. Replaces a Nansen subscription for one-off lookups.
4. "What's the market saying about the 2028 election?"
blockrun_surf({ path: "search/polymarket", params: { q: "2028 US president" } })
blockrun_surf({ path: "search/kalshi", params: { q: "2028 US president" } })
blockrun_surf({ path: "prediction-market/polymarket/prices",
params: { condition_id: "0x..." } })
5. "Where's mindshare moving for L1s?"
blockrun_surf({ path: "social/mindshare", params: { q: "solana", interval: "1d" } })
blockrun_surf({ path: "social/mindshare", params: { q: "monad", interval: "1d" } })
blockrun_surf({ path: "social/ranking" })
6. "ETF flows + funding rate + long/short — give me the macro picture"
blockrun_surf({ path: "market/etf", params: { symbol: "BTC" } })
blockrun_surf({ path: "market/fear-greed" })
blockrun_surf({ path: "exchange/funding-history", params: { pair: "BTC-USDT" } })
blockrun_surf({ path: "exchange/long-short-ratio", params: { pair: "BTC-USDT" } })
Cost: 4 × $0.0085 = $0.034.
Method Routing — When to Use body
Pass body (POST) only for these three endpoints:
onchain/query — structured, typed predicates against ClickHouseonchain/sql — raw SQL string in { sql: "..." }
Everything else is GET with params.
Python SDK (for non-MCP use)
from blockrun_llm import setup_agent_wallet
client = setup_agent_wallet()
price = client._get_with_payment_raw("/v1/surf/market/price", {"symbol": "BTC"})
result = client._request_with_payment_raw("/v1/surf/onchain/sql", {
"sql": "SELECT count() FROM ethereum.transactions WHERE block_time > now() - INTERVAL 1 HOUR"
})
Full Endpoint Catalog (83 endpoints, 12 categories)
Exchange (CEX) — 7
exchange/markets · exchange/price · exchange/perp · exchange/depth · exchange/klines · exchange/funding-history · exchange/long-short-ratio
Fund (VC intelligence) — 3
fund/detail · fund/portfolio · fund/ranking
Market — 11
market/ranking · market/fear-greed · market/futures · market/price · market/etf · market/options · market/liquidation/exchange-list · market/liquidation/order · market/liquidation/chart · market/onchain-indicator · market/price-indicator
News — 2
news/feed · news/detail
On-chain — 7
onchain/bridge/ranking · onchain/yield/ranking · onchain/gas-price · onchain/tx · onchain/schema · onchain/query (POST) · onchain/sql (POST)
Prediction Markets — 17
Polymarket: prediction-market/polymarket/ranking · .../trades · .../markets · .../events · .../prices · .../volumes · .../open-interest · .../positions · .../activity · prediction-market/category-metrics
Kalshi: prediction-market/kalshi/ranking · .../markets · .../events · .../prices · .../trades · .../volumes · .../open-interest
Project + DeFi — 3
project/detail · project/defi/metrics · project/defi/ranking
Search — 11
search/airdrop · search/events · search/kalshi · search/polymarket · search/web · search/project · search/news · search/wallet · search/fund · search/social/people · search/social/posts
Social — 11
social/detail · social/ranking · social/smart-followers/history · social/mindshare · social/tweets · social/tweet/replies · social/user · social/user/followers · social/user/following · social/user/posts · social/user/replies
Token — 4
token/tokenomics · token/dex-trades · token/holders · token/transfers
Wallet — 6
wallet/detail · wallet/history · wallet/net-worth · wallet/transfers · wallet/protocols · wallet/labels/batch
Web — 1
web/fetch
Gotchas
- Required params: 56 of 83 endpoints require at least one param. The 402 response and the in-tool route surface which fields are missing. Missing params → 400 + no charge.
- Solana wallet works too:
blockrun_surf routes through whichever chain the BlockRun wallet is on (Base or Solana). Surf settlement always lands in Surf's Base treasury.
onchain/sql is powerful but unrestricted: there's no row limit on the server side. Add LIMIT to your query or you'll pay for a megabyte of JSON.X-Payment-Receipt header lands on the response with the settlement tx hash — keep it for accounting.
Reference
