bap_friend

THE RISK

High Risk

Why bap_friend needs a policy

This tool broadcasts a transaction to the BSV blockchain, which is an irreversible on-chain action. While not financial or destructive in the traditional sense, it executes an external blockchain operation with permanent effects. Broadcasting transactions cannot be undone once confirmed on-chain, making this an Execute-category action with high severity due to the permanent, public nature of blockchain writes.

From the tool's definition Initiates a friend request to another BAP ID by broadcasting an on-chain MAP transaction

Documented attack patterns abuse exactly the kind of access bap_friend gives an agent:

POLICY

How to control bap_friend

PolicyLayer is an MCP gateway — it sits between your AI agents and Bitcoin SV MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for bap_friend:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "bap_friend": {
      "limits": [
        {
          "counter": "bap_friend_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

bap_friend stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Bitcoin SV MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Bitcoin SV MCP Server tools

Financial bsocial_createPost Create a social post on the BSV blockchain using B:// and MAP protocols. Posts are stored Financial wallet_cancelListing Cancel an ordinal marketplace listing Financial wallet_transferOrdToken Transfer an ordinal inscription or send BSV21 fungible tokens. Use type= Financial wallet_acquireCertificate Acquires an identity certificate from a certifier. Financial wallet_listOrdinal List an ordinal for sale on the marketplace Financial wallet_mintCollection Mint a collection of ordinals from a folder of images with proper metadata. This tool crea Financial wallet_opnsDeregister Deregister an OpNS name Financial wallet_purchaseListing Purchases a listing from the Bitcoin SV ordinals marketplace. Supports both NFT purchases

All 80 Bitcoin SV MCP Server tools →

Execute tools on other servers

Android Forensics ADB MCP Server adb_shell_command EMBA-MCP run_emba_scan Frida Game Hacking MCP remove_breakpoint Procmon request_elevation

Go deeper

Govern code and CI agents → Branch allowlists, approval on merges, and rate caps on the build and pipeline tools agents trigger.
High-risk tools in Bitcoin SV MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about bap_friend

What does the bap_friend tool do? +

Initiates a friend request to another BAP ID by broadcasting an on-chain MAP transaction. It is categorised as a Execute tool in the Bitcoin SV MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on bap_friend? +

Register the Bitcoin SV MCP Server MCP server in PolicyLayer and add a rule for bap_friend: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Bitcoin SV MCP Server. Nothing to install.

What risk level is bap_friend? +

bap_friend is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit bap_friend? +

Yes. Add a rate_limit block to the bap_friend rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block bap_friend completely? +

Set action: deny in the PolicyLayer policy for bap_friend. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides bap_friend? +

bap_friend is provided by the Bitcoin SV MCP Server MCP server (b-open-io/bsv-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Bitcoin SV MCP Server tool call.

Start from Bitcoin SV MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →