Sablebolt swaps

io.sablebolt/swapssablebolt.iostreamable-httpv1.1.0Scanned 50 minutes ago

Account-free crypto swaps: assets, routes, limits, live quotes, address checks, swap status

8 tools: 2 do something that can't be undone and 6 only read.

Reads private data · 0
Reads text others write · 1
Can send data out · 2
1 finding

Anlyon alternative

2 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.

Import an OpenAPI spec →

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

8 tools

Can't be undone 2Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

create_swapCreates the swap and returns the payment instruction: the one-time deposit address, the memo if the chain needs one, the exact amount in decimal and in base units with the decimals…Reads text others writeCan send data outNo findings
Why it is in this group
- The name "create_swap" says "create": a word for a change.
- The input addresses people (input.to): what it sends cannot be taken back.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- outboundThe input takes a destination (input.to): what the tool writes goes there.
Description, as the server wrote it
Creates the swap and returns the payment instruction: the one-time deposit address, the memo if the chain needs one, the exact amount in decimal and in base units with the decimals and token contract as listed by the liquidity partner, a wallet URI where a standard exists (BIP-21, ERC-681, Solana Pay, Monero, TON), and the status URL. Use it only when you control the wallet at fromAddress and will send the deposit yourself; for a person use swap_page_link. The deposit must come from fromAddress; there is no refund address — a swap that cannot be completed is handled by support from the swap id. Floating rate: the final amount is set when the deposit confirms.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
swap_page_linkThe page where the person completes the swap, with the amount prefilled.Can send data out1 finding
Why it is in this group
- The name "swap_page_link" says "link": a word for a change.
- The input addresses people (input.to): what it sends cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- outboundThe input takes a destination (input.to): what the tool writes goes there.
Findings
- Warn
  The server marks "swap_page_link" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
  Matched text
  annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "swap_page_link" says "link": a word for a change.
  What this check looks for
Description, as the server wrote it
The page where the person completes the swap, with the amount prefilled. A swap for a person is completed by that person on the page: open the link, check the amount, both addresses and the memo on screen, then send the deposit from your own wallet. An agent that controls the sending wallet itself uses create_swap and pays the instruction it gets back.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false

Only reads 6Looks things up and changes nothing.Show 6 read-only tools

get_limitsMinimum and maximum amount for a route, in the asset you send.No findings
Why it is in this group
- The name "get_limits" says "get": a word for reading.
Description, as the server wrote it
Minimum and maximum amount for a route, in the asset you send.
Annotations the server declares
- readOnlyHint: true
get_quoteFloating estimate for a route and amount: amountTo, networkFee (taken out of the payout), receiveAmount, rate.No findings
Why it is in this group
- The name "get_quote" says "get": a word for reading.
Description, as the server wrote it
Floating estimate for a route and amount: amountTo, networkFee (taken out of the payout), receiveAmount, rate. The final amount is set when the deposit confirms.
Annotations the server declares
- readOnlyHint: true
get_swap_statusStatus of one swap by id: stage (1 waiting … 5 done), deposit and payout addresses, amounts, both transaction hashes.No findings
Why it is in this group
- The name "get_swap_status" says "get": a word for reading.
Description, as the server wrote it
Status of one swap by id: stage (1 waiting … 5 done), deposit and payout addresses, amounts, both transaction hashes.
Annotations the server declares
- readOnlyHint: true
list_assetsEvery asset the swap form knows, with slug, ticker, network, confirmations, extra-id name and whether it is available right now.No findings
Why it is in this group
- The name "list_assets" says "list": a word for reading.
Description, as the server wrote it
Every asset the swap form knows, with slug, ticker, network, confirmations, extra-id name and whether it is available right now.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
list_routesEvery route with its own page (from/to slugs) and whether both sides are available right now.No findings
Why it is in this group
- The name "list_routes" says "list": a word for reading.
Description, as the server wrote it
Every route with its own page (from/to slugs) and whether both sides are available right now.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
validate_addressWhether an address has the right format for an asset.No findings
Why it is in this group
- The name "validate_address" says "validate": a word for reading.
Description, as the server wrote it
Whether an address has the right format for an asset. Does not check who owns it or whether an exchange needs a memo.
Annotations the server declares
- readOnlyHint: 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.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write1: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; create_swap
Can send data out2: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.; create_swap
swap_page_link

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warnswap_page_link
The server marks "swap_page_link" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
Matched text
annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "swap_page_link" says "link": a word for a change.
What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http swaps https://api.sablebolt.io/mcp

claude mcp add --transport http swaps https://api.sablebolt.io/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__swaps__list_assets",
      "mcp__swaps__list_routes",
      "mcp__swaps__get_limits",
      "mcp__swaps__get_quote",
      "mcp__swaps__validate_address",
      "mcp__swaps__get_swap_status"
    ],
    "ask": [
      "mcp__swaps__create_swap",
      "mcp__swaps__swap_page_link"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as swaps. Review it before you use it.

Capability tags behind 2 rules

mcp__swaps__create_swap untrusted-input, outbound
mcp__swaps__swap_page_link outbound

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.sablebolt/swaps/verify?hash=334900aedd7fd826f5a2132e76bd0902349eb5cfe6338de20e4f3ba10983bb49" | jq -e '.changed == false'

Pinned hash 334900aedd7f, from Nov 3, 2026, 17:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.sablebolt/swaps/changes.xml

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Badge

[![anlyon.dev](https://anlyon.dev/badge/io.sablebolt/swaps.svg)](https://anlyon.dev/servers/io.sablebolt/swaps)

Source: MCP Registry. Synced Nov 3, 2026, 17:18 UTC.