Professor Sausages — On-chain

by professorsausages.com · remote · no sign-in to list tools · v1.0.1 · published by com.professorsausages

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

Final · 1Changes · 8

Compare Registry entry

12 tools: 1 do something that can't be undone, 8 change things and 3 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things8Claude Code: ask: see these tools
Only reads3Claude Code: allow: see these tools

5 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http sausage-onchain https://x402.professorsausages.com/mcp/onchain

Findings

Matches of fixed checks, with the text they matched.

5 warn

Warntoken_safety
The input schema at properties.address.examples[0] contains a 42-character base64 string.
Matched text
inputSchema.properties.address.examples[0]: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
What this check looks for
Warnaddress_screen
The input schema at properties.address.examples[0] contains a 42-character base64 string.
Matched text
inputSchema.properties.address.examples[0]: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
What this check looks for
Warnswap_quote
The input schema at properties.token_out.examples[0] contains a 42-character base64 string.
Matched text
inputSchema.properties.token_out.examples[0]: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
What this check looks for
Warnnft_scam_check
The input schema at properties.contract.examples[0] contains a 42-character base64 string.
Matched text
inputSchema.properties.contract.examples[0]: "0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D"
What this check looks for
Warnnft_scam_check
The input schema at properties.wallet.examples[0] contains a 42-character base64 string.
Matched text
inputSchema.properties.wallet.examples[0]: "0xFe89cc7aBB2C4183683ab71653C4cdc9B02D44b7"
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

12 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

spot_priceLive Chainlink on-chain spot price for an asset (latestRoundData, with round metadata).No findings
Why it is in this group
- The input addresses people (input.to): what it sends cannot be taken back.
Description, as the server wrote it
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.

Changes things 8Creates or changes something that can be changed back.Claude Code: ask

address_screenScreen a crypto address against the full live OFAC SDN list, segmented by chain.1 finding
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Findings
- Warn
  The input schema at properties.address.examples[0] contains a 42-character base64 string.
  Matched text
  inputSchema.properties.address.examples[0]: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  What this check looks for
Description, as the server wrote it
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.
chain_infoCanonical record for an EVM chain — name, native currency, explorers, liveness-scored public RPCs.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
gas_priceBid-ready EIP-1559 fees (slow/standard/fast maxFeePerGas + maxPriorityFeePerGas, tx-ready wei) for one chain, read live from public RPCs.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
nft_scam_checkDeterministic scam checklist with a verdict and evidence (spam flags, copymint collisions, holder concentration).2 findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Findings
- Warn
  The input schema at properties.contract.examples[0] contains a 42-character base64 string.
  Matched text
  inputSchema.properties.contract.examples[0]: "0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D"
  What this check looks for
- Warn
  The input schema at properties.wallet.examples[0] contains a 42-character base64 string.
  Matched text
  inputSchema.properties.wallet.examples[0]: "0xFe89cc7aBB2C4183683ab71653C4cdc9B02D44b7"
  What this check looks for
Description, as the server wrote it
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.
pricingEvery 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.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
request_dataThe suggestion box: ask for data we don't have (a pre-2015 filing, an uncovered ticker, an unsupported chain, a whole dataset).No findings
Why it is in this group
- The name "request_data" says "request": a word for a change.
Description, as the server wrote it
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.
swap_quoteIndicative 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.1 finding
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Findings
- Warn
  The input schema at properties.token_out.examples[0] contains a 42-character base64 string.
  Matched text
  inputSchema.properties.token_out.examples[0]: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  What this check looks for
Description, as the server wrote it
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.
token_safetyHeuristic token safety check: follows the proxy and scans the bytecode that actually runs, plus ownership and transfer restrictions.1 finding
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Findings
- Warn
  The input schema at properties.address.examples[0] contains a 42-character base64 string.
  Matched text
  inputSchema.properties.address.examples[0]: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  What this check looks for
Description, as the server wrote it
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.

Only reads 3Looks things up and changes nothing.Claude Code: allow

ens_resolveResolve an ENS name to an address, or an address to its forward-verified primary name — direction is detected from the input.No findings
Why it is in this group
- The name "ens_resolve" says "resolve": a word for reading.
Description, as the server wrote it
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.
find_dataDescribe the data you need in plain language (e.g.No findings
Why it is in this group
- The name "find_data" says "find": a word for reading.
Description, as the server wrote it
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.
gas_compareRank 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.No findings
Why it is in this group
- The name "gas_compare" says "compare": a word for reading.
Description, as the server wrote it
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.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http sausage-onchain https://x402.professorsausages.com/mcp/onchain

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__sausage-onchain__find_data",
      "mcp__sausage-onchain__gas_compare",
      "mcp__sausage-onchain__ens_resolve"
    ],
    "ask": [
      "mcp__sausage-onchain__pricing",
      "mcp__sausage-onchain__request_data",
      "mcp__sausage-onchain__gas_price",
      "mcp__sausage-onchain__spot_price",
      "mcp__sausage-onchain__token_safety",
      "mcp__sausage-onchain__address_screen",
      "mcp__sausage-onchain__swap_quote",
      "mcp__sausage-onchain__chain_info",
      "mcp__sausage-onchain__nft_scam_check"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as sausage-onchain. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.professorsausages/sausage-onchain/changes.xml

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Anlyon alternative

9 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Source: MCP Registry. Synced Oct 21, 2026, 18:00 UTC.

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