What is blockchain-mcp AGENTS.md?

Repository guidance for Blockchain MCP, a read-only service that exposes tools for inspecting Bitcoin, Ethereum, and Mezo blockchain data. An MCP server is a service that lets an AI assistant call defined tools.

Use it when developing, configuring, or documenting this MCP server and its integrations with coding assistants.

It explains the supported endpoints, repository layout, and client configuration while making clear that the tools cannot sign transactions, access wallets, or change blockchain state.

How boar-network/blockchain-mcp configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to boar-network/blockchain-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/boar-network/blockchain-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/boar-network/blockchain-mcp

Made for: Claude Code, Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/boar-network/blockchain-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/boar-network/blockchain-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/boar-network/blockchain-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/boar-network/blockchain-mcp/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/boar-network/blockchain-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/boar-network/blockchain-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 585 This file is loaded in full into every session.

When invoked 585 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00585	$0.00585
Opus 5.5	$0.00234	$0.00234
Sonnet 5.5	$0.00117	$0.00117
Haiku 4.5	$0.00059	$0.00059

Measured 2mo ago against content hash da6ff8efe1f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

blockchain-mcp AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 56 lines

How it starts

The opening of the file, as written. The whole thing — 56 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Boar Blockchain MCP

This repository is the source of truth for Boar blockchain MCP - a free, keyless remote MCP server exposing 65 read-only blockchain tools across Bitcoin, Ethereum, and Mezo (mainnet and testnet). No local installation required.

The server runs on Cloudflare Workers and is available at:

Basic endpoint (46 tools): https://mcp.boar.network/basic
Advanced endpoint (19 tools): https://mcp.boar.network/advanced

All tools are strictly read-only. No transaction signing, no wallet access, no state mutation.

Repository Structure

clients/ - setup guides for Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Gemini CLI, OpenCode
docs/ - tool references, basic vs advanced guide, prompt cookbook
.mcp.json - MCP server configuration for Claude Code (project-level auto-detection)
opencode.json - MCP server configuration for OpenCode (project-level auto-detection)
.claude-plugin/ - Claude plugin standard files (see below)
.plugin/ - Open Plugin Standard files (see below)

Plugin Standards

Claude Plugin Standard

The .claude-plugin/ directory follows the Claude plugin standard for Claude Code and Claude Desktop.

Relevant files:

.claude-plugin/plugin.json - plugin manifest referencing the MCP server config
.claude-plugin/mcp.json - MCP server configuration (referenced by plugin.json via "mcpServers": "./mcp.json")
.claude-plugin/marketplace.json - marketplace manifest enabling installation via /plugin install

To install via Claude Code:

/plugin install boar-blockchain-mcp@boar-network/blockchain-mcp

OpenCode

The opencode.json file in the repo root is auto-detected by OpenCode as a project-level MCP config.

Relevant files:

opencode.json - MCP server configuration using "type": "remote" and top-level "mcp" key (OpenCode's format)
clients/opencode.md - setup guide

Open Plugin Standard

The .plugin/ directory follows the Open Plugin Standard.

Read the full file on GitHub · 56 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 56 lines · 585 tokens per session scan A da6ff8efe1f2

Subscribe to this mod's changes

blockchain-mcp AGENTS.md is an instructions file published in the GitHub repository boar-network/blockchain-mcp (12 stars, last pushed 4mo ago), licensed MIT. It adds 585 tokens to every session, about $0.0023 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Web3 and blockchain

blockchain-mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
blockchain-mcp AGENTS.mdboar-network/blockchain-mcp	Instructions file	12	4mo ago	MIT	A	585	Claude Code, Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	1,907	GitHub Copilot

blockchain-mcp: Instructions file for Claude Code