Base Transaction Decoder
by @0200project · io.github.0200project/base-transaction-decoder
Decode any Base tx: plain English, strict JSON, risk flags, no LLM. 50 free/day per IP, then $0.02.
- Category
- Developer tools
- Connection
- Remote (HTTP)
- Tools
- 2 reported
- Status
- Online
Connect it to your AI
Claude Code
claude mcp add --transport http base-transaction-decoder https://api.0200project.com/mcp?ref=mcp-registryClaude, ChatGPT, Cursor and other apps
Add it as a custom connector with this URL (Streamable HTTP):
https://api.0200project.com/mcp?ref=mcp-registryCursor, VS Code and other apps (mcp.json)
{
"mcpServers": {
"base-transaction-decoder": {
"url": "https://api.0200project.com/mcp?ref=mcp-registry"
}
}
}Tools it offers
2 tools, as the server itself reported during our check on Oct 31, 2026.
explain_transactionExplain 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[buy_passBuy 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
Questions
What is the Base Transaction Decoder MCP server?
Decode any Base tx: plain English, strict JSON, risk flags, no LLM. 50 free/day per IP, then $0.02. It is made by @0200project and listed in the official MCP Registry as io.github.0200project/base-transaction-decoder. MCP (Model Context Protocol) is the open standard that lets AI apps like Claude, ChatGPT and Cursor use outside tools.
How do I add Base Transaction Decoder to Claude?
In the Claude app or claude.ai, open Settings, then Connectors, choose "Add custom connector" and paste https://api.0200project.com/mcp?ref=mcp-registry. In Claude Code, run: claude mcp add --transport http base-transaction-decoder https://api.0200project.com/mcp?ref=mcp-registry
How do I add Base Transaction Decoder to ChatGPT?
ChatGPT can use remote MCP servers as connectors. In ChatGPT settings, under Apps and Connectors, turn on developer mode if asked, create a new connector and paste https://api.0200project.com/mcp?ref=mcp-registry.
How do I add Base Transaction Decoder to Cursor?
Open Cursor settings, go to MCP, choose "Add new MCP server" (or edit ~/.cursor/mcp.json) and add: { "mcpServers": { "base-transaction-decoder": { "url": "https://api.0200project.com/mcp?ref=mcp-registry" } } }
Does Base Transaction Decoder work right now?
Yes. It responded when we last checked on 31 Oct 2026. We check remote MCP servers every day.
What can Base Transaction Decoder do?
It gives your AI 2 tools, including explain_transaction, buy_pass. The full list is on this page.
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Markdown (GitHub README)
[](https://chen.media/mcp/github-0200project-base-transaction-decoder)HTML (switches to dark mode on its own)
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