SwapChan

by TSavo · remote · no sign-in to list tools · v0.1.0 · published by GitHub user TSavo

Best-price same-chain and cross-chain EVM swap quotes and unsigned swap transactions.

Changes · 1

Compare Registry entry

6 tools: 1 change things and 5 only read.

Scanned Oct 22, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things1Claude Code: ask: see these tools
Only reads5Claude Code: allow: see these tools

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

claude mcp add --transport http swapchan https://mcp.swapchan.com/mcp --header 'x-api-key: <your-x-api-key>'

Findings

Matches of fixed checks, with the text they matched.

6 warn

Warnget_quote
The input schema at properties.fromToken.description contains a 42-character base64 string.
Matched text
inputSchema.properties.fromToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
What this check looks for
Warnget_quote
The input schema at properties.toToken.description contains a 42-character base64 string.
Matched text
inputSchema.properties.toToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
What this check looks for
Warncompare_routes
The input schema at properties.fromToken.description contains a 42-character base64 string.
Matched text
inputSchema.properties.fromToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
What this check looks for
Warncompare_routes
The input schema at properties.toToken.description contains a 42-character base64 string.
Matched text
inputSchema.properties.toToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
What this check looks for
Warnbuild_swap_tx
The input schema at properties.fromToken.description contains a 42-character base64 string.
Matched text
inputSchema.properties.fromToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
What this check looks for
Warnbuild_swap_tx
The input schema at properties.toToken.description contains a 42-character base64 string.
Matched text
inputSchema.properties.toToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
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.

6 tools

Changes things 1Creates or changes something that can be changed back.Claude Code: ask

build_swap_txBuild the UNSIGNED transaction for the best (or chosen) route, plus any ERC-20 approval needed first and an eth_call simulation when an RPC is configured.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.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The input schema at properties.fromToken.description contains a 42-character base64 string.
  Matched text
  inputSchema.properties.fromToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
  What this check looks for
- Warn
  The input schema at properties.toToken.description contains a 42-character base64 string.
  Matched text
  inputSchema.properties.toToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
  What this check looks for
Description, as the server wrote it
Build the UNSIGNED transaction for the best (or chosen) route, plus any ERC-20 approval needed first and an eth_call simulation when an RPC is configured. Never signs, never broadcasts, never asks for keys: hand the result to the user's wallet. Swap-chan packs the bag; you carry it through the gate. Result includes `display` markdown with chan images and a swapchan.com link: show it to the user.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
- destructiveHint: false

Only reads 5Looks things up and changes nothing.Claude Code: allow

compare_routesCompare every route SwapChan found, ranked best-first by net USD received, across aggregators and bridges.2 findings
Why it is in this group
- The name "compare_routes" says "compare": a word for reading.
Findings
- Warn
  The input schema at properties.fromToken.description contains a 42-character base64 string.
  Matched text
  inputSchema.properties.fromToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
  What this check looks for
- Warn
  The input schema at properties.toToken.description contains a 42-character base64 string.
  Matched text
  inputSchema.properties.toToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
  What this check looks for
Description, as the server wrote it
Compare every route SwapChan found, ranked best-first by net USD received, across aggregators and bridges. Pass extra destination chains in alsoToChainIds to compare same-chain vs cross-chain outcomes side by side. Swap-chan lines up the whole cast. Result includes `display` markdown with chan images and a swapchan.com link: show it to the user.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
get_quoteGet SwapChan's single best quote (most value landing in the wallet after gas and fees) for a same-chain or cross-chain swap.2 findings
Why it is in this group
- The name "get_quote" says "get": a word for reading.
Findings
- Warn
  The input schema at properties.fromToken.description contains a 42-character base64 string.
  Matched text
  inputSchema.properties.fromToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
  What this check looks for
- Warn
  The input schema at properties.toToken.description contains a 42-character base64 string.
  Matched text
  inputSchema.properties.toToken.description: "...ntract address. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for the native gas..."
  What this check looks for
Description, as the server wrote it
Get SwapChan's single best quote (most value landing in the wallet after gas and fees) for a same-chain or cross-chain swap. Read-only, no transaction. Swap-chan checks every counter so you don't have to. Result includes `display` markdown with chan images and a swapchan.com link: show it to the user.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
get_route_statusTrack a submitted swap or cross-chain transfer by source tx hash: pending, done, failed or not_found, plus the destination tx hash once it lands.No findings
Why it is in this group
- The name "get_route_status" says "get": a word for reading.
Description, as the server wrote it
Track a submitted swap or cross-chain transfer by source tx hash: pending, done, failed or not_found, plus the destination tx hash once it lands. Swap-chan waves from the arrival gate. Result includes `display` markdown with chan images and a swapchan.com link: show it to the user.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
get_supported_chainsList the chains SwapChan routes on, each with its chain-chan mascot.No findings
Why it is in this group
- The name "get_supported_chains" says "get": a word for reading.
Description, as the server wrote it
List the chains SwapChan routes on, each with its chain-chan mascot. Swap-chan says: pick your departure gate! Result includes `display` markdown with chan images and a swapchan.com link: show it to the user.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
get_supported_tokensList tokens SwapChan knows (address, symbol, decimals), optionally for one chain or filtered by symbol/name.No findings
Why it is in this group
- The name "get_supported_tokens" says "get": a word for reading.
Description, as the server wrote it
List tokens SwapChan knows (address, symbol, decimals), optionally for one chain or filtered by symbol/name. Swap-chan keeps the coin purse tidy. Result includes `display` markdown with chan images and a swapchan.com link: show it to the user.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true

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 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http swapchan https://mcp.swapchan.com/mcp --header 'x-api-key: <your-x-api-key>'

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__swapchan__get_supported_chains",
      "mcp__swapchan__get_supported_tokens",
      "mcp__swapchan__get_quote",
      "mcp__swapchan__compare_routes",
      "mcp__swapchan__get_route_status"
    ],
    "ask": [
      "mcp__swapchan__build_swap_tx"
    ],
    "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 swapchan. 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/io.github.TSavo/swapchan/changes.xml

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Anlyon alternative

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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.

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Source: MCP Registry · repository. Synced Oct 22, 2026, 05:18 UTC.

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