# btc_send_transfer

Send BTC to one or more recipients with sat-denominated amounts.

Agent View of the PolicyLayer registry record for `btc_send_transfer`. HTML page: https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-send-transfer

## Facts

- Tool: `btc_send_transfer`
- Server: Bitcoin wallet MCP server (`markmhendrickson/mcp-server-bitcoin`) — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin.md
- Homepage: https://github.com/markmhendrickson/mcp-server-bitcoin
- Risk category: Financial (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Approval-gated

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "btc_send_transfer",
    "arguments": {}
  }
}
```

## Why btc_send_transfer is rated Critical

This tool directly transfers Bitcoin to recipient addresses, which constitutes moving financial assets and committing financial obligations. This is the most severe category (Financial > Destructive > Execute > Write > Read). The blast radius of misuse by an AI agent is critical: unauthorized sending of BTC results in permanent loss of funds with no recovery mechanism.

From the tool's own definition: "Tool description states 'Send BTC to one or more recipients' - this is a direct transfer of cryptocurrency funds. Combined with server description indicating 'sending' operations on a Bitcoin wallet MCP server, this tool moves money (BTC) irreversibly."

## Use case

AI agents use btc_send_transfer to commit financial operations through Bitcoin wallet MCP server, usually the final step of a payment, billing, or trading workflow. A call moves real money.

## Recommended policy (PolicyLayer)

Verdict: **Approval-gated**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Bitcoin wallet MCP server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "btc_send_transfer": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}
```

## Other tools on Bitcoin wallet MCP server (92)

- `btc_sign_message` — Execute — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-sign-message.md
- `ledger_sign_stx_transaction` — Execute — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/ledger-sign-stx-transaction.md
- `stx_call_contract` — Execute — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-call-contract.md
- `stx_sign_structured_message` — Execute — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-sign-structured-message.md
- `stx_sign_transaction` — Execute — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-sign-transaction.md
- `stx_sign_transactions` — Execute — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-sign-transactions.md
- `bns_register` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/bns-register.md
- `btc_combine_utxos` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-combine-utxos.md
- `btc_send_max` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-send-max.md
- `btc_sign_batch_psbt` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-sign-batch-psbt.md
- `btc_wallet_send_transfer` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-wallet-send-transfer.md
- `ledger_sign_psbt` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/ledger-sign-psbt.md
- `ord_create_repeat_inscriptions` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/ord-create-repeat-inscriptions.md
- `ord_recover_bitcoin` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/ord-recover-bitcoin.md
- `ord_send_inscriptions` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/ord-send-inscriptions.md
- `ord_send_inscriptions_split` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/ord-send-inscriptions-split.md
- `sbtc_bridge_withdraw` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/sbtc-bridge-withdraw.md
- `stx_deploy_contract` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-deploy-contract.md
- `stx_revoke_delegation` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-revoke-delegation.md
- `stx_stack` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-stack.md
- `stx_transfer_sip10_ft` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-transfer-sip10-ft.md
- `stx_transfer_sip9_nft` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-transfer-sip9-nft.md
- `stx_transfer_stx` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/stx-transfer-stx.md
- `swap_execute` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/swap-execute.md
- `tx_cancel` — Financial — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/tx-cancel.md
- `bns_get_names` — Read — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/bns-get-names.md
- `bns_lookup` — Read — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/bns-lookup.md
- `btc_decode_psbt` — Read — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-decode-psbt.md
- `btc_estimate_fee` — Read — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-estimate-fee.md
- `btc_get_accounts` — Read — https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin/btc-get-accounts.md
- …and 62 more: https://policylayer.com/tools/markmhendrickson-mcp-server-bitcoin.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=markmhendrickson-mcp-server-bitcoin · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/markmhendrickson-mcp-server-bitcoin