surf-chain

Research

On-chain analytics via Surf — raw SQL against 80+ indexed chain tables, structured queries, schema introspection, wallet labels (CEX/Whale/Bridge/MEV…), wallet net worth, transfers, DeFi positions, gas prices, bridge volumes, yield pools. Use when the user wants on-chain forensics, wallet intelligence, holder analysis, transfer tracking, or custom chain queries.

QUICK START

How to use this skill

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Source SKILL.md: https://github.com/BlockRunAI/Franklin/blob/HEAD/src/skills-bundled/surf-chain/SKILL.md

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You are running inside Franklin on {{wallet_chain}}. Use the BlockRun tool to call Surf's on-chain endpoints. The flagship capability here is on-chain SQL — write a query against 80+ indexed chain tables and get back a result set in sub-second.

Two different "chains" to keep straight:

Payment chain — where Franklin's wallet signs the x402 USDC payment. Currently {{wallet_chain}}. Surf only accepts settlement on Base (treasury 0x058a59…). If the user is on Solana, ask them to /chain base before retrying.
Query chain — the chain the data is about. Passed as a parameter to endpoints like onchain/gas-price, onchain/tx, token/holders, token/transfers. Valid values include ethereum, base, arbitrum, polygon, optimism, bsc. When the user doesn't specify and they're on base, default to chain: "base". If they ask about Solana on-chain data, note that these EVM-shaped endpoints don't cover Solana — use a Solana-specific tool instead.

How to use

BlockRun({ path: "/v1/surf/<endpoint>", method: "<GET|POST>", params|body: { ... } }). Method is GET unless the catalog says POST.

Endpoint catalog

Direct lookups (Tier 1, $0.001)

Path	Method	Required	What it returns
`/v1/surf/onchain/gas-price`	GET	`chain`	Current gas on the named chain
`/v1/surf/onchain/tx`	GET	`hash`, `chain`	Tx details
`/v1/surf/onchain/bridge/ranking`	GET	—	Bridge protocols ranked by volume
`/v1/surf/onchain/yield/ranking`	GET	—	Yield pools (lending, LP, staking)

Raw + structured chain query (Tier 3, $0.02 — premium)

Path	Method	Required	What it returns
`/v1/surf/onchain/schema`	GET	—	ClickHouse table schema introspection. Always call this FIRST before writing SQL so you know the tables, columns, and types.
`/v1/surf/onchain/query`	POST	— (typed body)	Structured chain query with typed predicates. Safer than SQL when the question fits a fixed shape.
`/v1/surf/onchain/sql`	POST	body: `{ query: string }`	Raw SQL against 80+ indexed tables. Sub-second. Use for novel questions that the typed query can't express.

Token analytics (Tier 2, $0.005)

Path	Method	Required	What it returns
`/v1/surf/token/holders`	GET	`address`, `chain`	Top token holders with balances
`/v1/surf/token/transfers`	GET	`address`, `chain`	Token transfer history

Wallet intelligence (Tier 2, $0.005)

Path	Method	Required	What it returns
`/v1/surf/wallet/detail`	GET	`address`	Aggregated wallet profile across chains
`/v1/surf/wallet/history`	GET	`address`	Transaction history
`/v1/surf/wallet/net-worth`	GET	`address`	Net-worth time series
`/v1/surf/wallet/transfers`	GET	`address`	Transfer history
`/v1/surf/wallet/protocols`	GET	`address`	DeFi positions (Aave, Lido, Uniswap, etc.)
`/v1/surf/wallet/labels/batch`	GET	`addresses` (comma-sep)	Batch label lookup: CEX, Whale, Bridge, MEV, Contract, etc.

How to choose

"What's gas on Base?" → onchain/gas-price with chain: "base" ($0.001). One call, done.
"Look up this tx" → onchain/tx with hash + chain.
"Who owns this token?" → token/holders ($0.005). Pair with wallet/labels/batch on the top 20 to see which holders are CEXes vs whales.
"Profile this wallet" → wallet/detail first ($0.005). If they want depth, follow up with wallet/history, wallet/net-worth, wallet/protocols.
"Is this address a CEX / whale / MEV bot?" → wallet/labels/batch — cheapest forensic call.
"Bridge volume this week" → onchain/bridge/ranking ($0.001).
"Best yield on USDC right now" → onchain/yield/ranking ($0.001), filter for USDC.

On-chain SQL workflow

For novel chain questions (e.g. "all addresses that received >100 ETH from Tornado in 2025"):

Schema first — BlockRun({ path: "/v1/surf/onchain/schema", method: "GET" }) ($0.02). Note the tables, columns, types.
Try structured query — BlockRun({ path: "/v1/surf/onchain/query", method: "POST", body: { /* typed predicates */ } }) ($0.02) when the shape fits.
Raw SQL fallback — BlockRun({ path: "/v1/surf/onchain/sql", method: "POST", body: { query: "SELECT …" } }) ($0.02) for anything else.
Validate — if SQL fails parse or returns empty unexpectedly, fix the query and re-run. Each retry is $0.02 — be deliberate.

Cost discipline

Wallet/token reads are $0.005 each. If you need 5 lookups, expect $0.025.
Tier-3 chain queries are $0.02/call. Plan the schema → query → result loop before firing; don't fire speculative SQL.
Always include the cost in your summary back to the user.

The user asked

$ARGUMENTS