Professor Sausages — On-chain

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

EVM gas, Chainlink prices, token-safety, swap quotes, ENS, OFAC & NFT via x402.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "Professor Sausages — On-chain": {
      "url": "https://x402.professorsausages.com/mcp/onchain",
      "transport": "streamable-http"
    }
  }
}

Measured tools (12)

• find_data

  Describe the data you need in plain language (e.g. 'Apple risk factors 2023', 'is this token a honeypot', 'is this email deliverable', 'read this page'). Searches this server's datasets first, then the whole Professor Sausages catalog, and returns matching endpoints with method, URL, price, and how to call them. Free.

  Parameters:

  • task (required) — string — What you're trying to find or do, in your own words

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• pricing

  Every endpoint this server fronts, with its exact per-call USD price (x402, USDC on Base) and a one-line summary, read live from the route table. Free.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• request_data

  The suggestion box: ask for data we don't have (a pre-2015 filing, an uncovered ticker, an unsupported chain, a whole dataset). Requests feed the nightly ingestion queue — filings are usually available within ~24h. Include contact if you want to hear back. Free.

  Parameters:

  • description (required) — string — What data you need, in your own words
  • contact — string — Optional: URL/email/handle for follow-up
  • use_case — string — Optional: what you're building

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• gas_price

  Bid-ready EIP-1559 fees (slow/standard/fast maxFeePerGas + maxPriorityFeePerGas, tx-ready wei) for one chain, read live from public RPCs. Pass tx_type to get the USD cost of that specific transaction instead, including the OP-stack L1 data fee naive estimators miss. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • gas — integer — Optional gas limit override when tx_type is set.
  • chain — string — Which chain's gas market to read.
  • speed — string — Which fee tier to price the estimate at.
  • tx_type — string — Optional: cost a specific transaction shape rather than returning raw fees.
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• gas_compare

  Rank every supported chain by all-in USD transaction cost — the 'where should I send this' routing decision, with the OP-stack L1 data fee included. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • gas — integer — Optional gas limit override.
  • speed — string — Fee tier to compare at.
  • tx_type — string — Transaction shape to price on every chain.
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• spot_price

  Live Chainlink on-chain spot price for an asset (latestRoundData, with round metadata). Pass `to` as well to cross-convert two assets via their USD feeds, with both legs reported. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • asset (required) — string — Asset symbol with a Chainlink feed (call /prices/feeds free to list them).
  • to — string — Optional second asset — converts `asset` into it instead of quoting USD.
  • chain — string — Which chain's oracle to read.
  • amount — number — Amount to convert (with `to`).
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• token_safety

  Heuristic token safety check: follows the proxy and scans the bytecode that actually runs, plus ownership and transfer restrictions. Returns a verdict with per-rule evidence. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • address (required) — string — Token contract address.
  • chain — string — Which chain the token contract is on.
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• address_screen

  Screen a crypto address against the full live OFAC SDN list, segmented by chain. Returns a verdict with the matching SDN entries as evidence — never a silent all-clear. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • address (required) — string — The address to screen, in that chain's native format.
  • chain — string — Which chain the address belongs to.
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• swap_quote

  Indicative UniswapV2 swap quote from live on-chain reserves: amount out, execution price, and price impact — what the trade will actually cost before you sign it. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • token_in (required) — string — Address of the token being sold.
  • token_out (required) — string — Address of the token being bought.
  • chain — string — Which chain to quote on.
  • amount — number — Amount of token_in to sell.
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• ens_resolve

  Resolve an ENS name to an address, or an address to its forward-verified primary name — direction is detected from the input. view='profile' returns the full identity card (multichain addresses, text records, contenthash, avatar); view='avatar' dereferences the avatar to an image URL. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • query (required) — string — An ENS name (ends in .eth) or a 0x address.
  • keys — string — Comma-separated ENS text-record keys (view='text').
  • view — string — resolve = name↔address; profile/avatar/text need a name.
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• chain_info

  Canonical record for an EVM chain — name, native currency, explorers, liveness-scored public RPCs. view='rpcs' returns only the ranked, eth_chainId-probed RPC list; view='wallet_config' returns a ready-to-submit EIP-3085 wallet_addEthereumChain object; view='search' finds chains by name or symbol; view='l2s' lists a parent chain's L2s. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • q — string — Name/symbol fragment (view='search').
  • view — string — Which shape of chain data to return.
  • parent — string — Parent chain id for view='l2s'.
  • chain_id — string — Numeric chain id (required for record/rpcs/wallet_config).
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• nft_scam_check

  Deterministic scam checklist with a verdict and evidence (spam flags, copymint collisions, holder concentration). Pass a collection contract to check the collection, or a wallet to check that wallet's whole scam exposure holding by holding. Paid: call without x_payment to receive this call's exact terms (amount, asset, network), sign them, then call again with x_payment. The free `pricing` tool lists every price at once.

  Parameters:

  • chain — string — Which chain to read (Ethereum mainnet today).
  • wallet — string — Wallet address — checks scam exposure across its holdings instead.
  • contract — string — Collection contract address to check.
  • x_payment — string — Optional signed x402 payment payload (base64, what the X-PAYMENT header carries). Omit to receive the exact payment terms; sign them (e.g. @x402/fetch) and call again with this argument to settle and get the data.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

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Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.