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Bitcoin PSBT, Address & Descriptor Verifier + WorkSats L402 MCP

dev.workers.jeffpersons.botcheck/bitcoin-psbt-descriptor-l402-worksatsbotcheck.jeffpersons.workers.devstreamable-httpv0.1.0Scanned

Verify Bitcoin PSBTs, addresses, and BIP380 descriptors; earn or spend WorkSats L402 bearer credits.

6 tools: 4 change things and 2 only read.

Tools: 0 delete, 0 irreversible, 4 write, 2 read.
  • Reads private data · 0
  • Reads text others write · 0
  • Can send data out · 0
  • 1 finding

Anlyon alternative

4 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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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.

6 tools

Changes things 4Claude Code: ask
  • check_bitcoin_addressVerify a Bitcoin address (Bech32m P2TR, Bech32 P2WPKH/P2WSH, Base58 P2PKH/P2SH): network, type, witness version, scriptPubKey hex, and common pitfalls.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.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Verify a Bitcoin address (Bech32m P2TR, Bech32 P2WPKH/P2WSH, Base58 P2PKH/P2SH): network, type, witness version, scriptPubKey hex, and common pitfalls. Never send private keys or seed phrases. Free tier: 2 calls/day per IP; after that, pass a WorkSats `creditToken` (`crd_...`, earned by solving a task from `worksats_get_task` via `worksats_solve_task`).

    Annotations the server declares

    • title: Check Bitcoin Address
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • worksats_creditsManage WorkSats bearer credits (`crd_...`): check `balance`, `split` credits to pay another bot, `rotate`/`merge` received tokens so the sender cannot double-spend, `bounty_create`…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
    Manage WorkSats bearer credits (`crd_...`): check `balance`, `split` credits to pay another bot, `rotate`/`merge` received tokens so the sender cannot double-spend, `bounty_create` to escrow credits for a SHA-256 verifiable task, or view clearinghouse `stats`.

    Annotations the server declares

    • title: Manage WorkSats Bearer Credits
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • worksats_get_taskFetch an open buyer-funded bounty task or a deterministic house micro-task (`descriptor_checksum_and_derive`) from the WorkSats clearinghouse (`GET /v1/tasks/next`).1 finding

    Why it is in this group

    • The name "worksats_get_task" says "get": a word for reading.
    • The server marks it as not read-only (readOnlyHint: false).

    Findings

    • Warn

      The server marks "worksats_get_task" as not read-only (readOnlyHint: false), and its words say it reads.

      Matched text

      annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The name "worksats_get_task" says "get": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Fetch an open buyer-funded bounty task or a deterministic house micro-task (`descriptor_checksum_and_derive`) from the WorkSats clearinghouse (`GET /v1/tasks/next`). Solve it and call `worksats_solve_task` to mint bearer credits (`crd_...`).

    Annotations the server declares

    • title: Get WorkSats Micro-Task
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • worksats_solve_taskSubmit a solved WorkSats task ticket (`tsk_...`) to mint a signed bearer credit token (`crd_...`).No findings

    Why it is in this group

    • The description's first verb is "submit": a word for a change.
    Description, as the server wrote it
    Submit a solved WorkSats task ticket (`tsk_...`) to mint a signed bearer credit token (`crd_...`). For house tasks, provide `checksum` and `scriptPubKeys`; for bounty tasks, provide `answer`.

    Annotations the server declares

    • title: Submit WorkSats Task Solution
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
Only reads 2Show 2 read-only tools
  • check_descriptorValidate a Bitcoin output descriptor (wpkh, wsh, tr, pkh, sh, multi, sortedmulti, raw, addr, combo): verifies or computes the 8-character BIP380 checksum, checks derivation paths a…No findings

    Why it is in this group

    • The description's first verb is "validate": a word for reading.
    Description, as the server wrote it
    Validate a Bitcoin output descriptor (wpkh, wsh, tr, pkh, sh, multi, sortedmulti, raw, addr, combo): verifies or computes the 8-character BIP380 checksum, checks derivation paths and xpubs, and derives sample addresses and scriptPubKeys. Never send xprv, WIF, or seed phrases.

    Annotations the server declares

    • title: Check Bitcoin Output Descriptor
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • check_psbtInspect an unsigned or partially signed Bitcoin PSBT (BIP174 base64 or hex) before signing: decodes inputs, outputs, fee, fee rate (sat/vB), change detection, sighash types, taproo…No findings

    Why it is in this group

    • The description's first verb is "inspect": a word for reading.
    Description, as the server wrote it
    Inspect an unsigned or partially signed Bitcoin PSBT (BIP174 base64 or hex) before signing: decodes inputs, outputs, fee, fee rate (sat/vB), change detection, sighash types, taproot/witness scripts, and flags high-fee or missing-prevout risks. Never send private keys or seed phrases.

    Annotations the server declares

    • title: Check Bitcoin PSBT
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

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 or untrusted-input or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

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
  • Warnworksats_get_task

    The server marks "worksats_get_task" as not read-only (readOnlyHint: false), and its words say it reads.

    Matched text

    annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The name "worksats_get_task" says "get": a word for reading.

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

claude mcp add --transport http bitcoin-psbt-descriptor-l402-worksats https://botcheck.jeffpersons.workers.dev/mcp?client=registry
claude mcp add --transport http bitcoin-psbt-descriptor-l402-worksats https://botcheck.jeffpersons.workers.dev/mcp?client=registry

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__bitcoin-psbt-descriptor-l402-worksats__check_psbt",
      "mcp__bitcoin-psbt-descriptor-l402-worksats__check_descriptor"
    ],
    "ask": [
      "mcp__bitcoin-psbt-descriptor-l402-worksats__check_bitcoin_address",
      "mcp__bitcoin-psbt-descriptor-l402-worksats__worksats_get_task",
      "mcp__bitcoin-psbt-descriptor-l402-worksats__worksats_solve_task",
      "mcp__bitcoin-psbt-descriptor-l402-worksats__worksats_credits"
    ],
    "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 bitcoin-psbt-descriptor-l402-worksats. Review it before you use it.

Pin

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/dev.workers.jeffpersons.botcheck/bitcoin-psbt-descriptor-l402-worksats/verify?hash=40eb5fcdf5741688c14ba613079172ae58559db16bb488a3b0de61075e8e287d" | jq -e '.changed == false'

Pinned hash 40eb5fcdf574, from Oct 27, 2026, 00:17 UTC.

Watch

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

https://anlyon.dev/servers/dev.workers.jeffpersons.botcheck/bitcoin-psbt-descriptor-l402-worksats/changes.xml

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Source: MCP Registry. Synced Oct 27, 2026, 00:17 UTC.