MCP server

Base Transaction Decoder

io.github.0200project/base-transaction-decoder

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Decode any Base tx: plain English, strict JSON, risk flags, no LLM. 50 free/day per IP, then $0.02.

Website Source

At a glance

Type

MCP server

Publisher

0200project.com (verified by the MCP Registry)

Status

Working at last check

Tools

2

Token cost

About 755 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http base-transaction-decoder https://api.0200project.com/mcp?ref=mcp-registry

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.base-transaction-decoder]
url = "https://api.0200project.com/mcp?ref=mcp-registry"

Gemini CLI

{"mcpServers":{"base-transaction-decoder":{"httpUrl":"https://api.0200project.com/mcp?ref=mcp-registry"}}}

Cursor

{"mcpServers":{"base-transaction-decoder":{"url":"https://api.0200project.com/mcp?ref=mcp-registry"}}}

VS Code

{"servers":{"base-transaction-decoder":{"type":"http","url":"https://api.0200project.com/mcp?ref=mcp-registry"}}}

Antigravity

agy mcp add base-transaction-decoder https://api.0200project.com/mcp?ref=mcp-registry

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"base-transaction-decoder","server_url":"https://api.0200project.com/mcp?ref=mcp-registry","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"base-transaction-decoder","server_url":"https://api.0200project.com/mcp?ref=mcp-registry"}

Tools

• buy_pass Moves money · ~134 tokens
  Buy a 30-day pass for $9 in USDC on Base via x402: up to 10,000 explain_transaction calls with no per-call payment. Returns a bearer pass token; attach it at _meta["btx/pass"] on MCP calls or as the X-BTX-Pass header on POST /explain. No account; the token is the only proof of purchase. Renew by buy
• explain_transaction ~621 tokens
  Explain a Base-mainnet transaction in plain English. Input: a transaction hash. Returns strict JSON: summary (1-3 sentences), action_type (swap, erc20_transfer, nft_mint, bridge_out, approval_for_all, ...), assets_moved[] (token, amount, from, to), counterparties[] (labeled where known: routers, bri

Browse

• GitHub tools
• Payments
• GitHub and code hosting
• Calling other AI models

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