What is base-transaction-decoder?

A remote MCP service that decodes transactions on Base, an Ethereum-based blockchain network, into plain English and strict JSON, with risk flags.

Use it to explain Base transaction data, obtain machine-readable transaction details, and identify reported risk flags.

It helps developers inspect blockchain transactions without manually interpreting their encoded data or using a language model for the decoding.

base-transaction-decoder — MCP server by 0200project

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add mcp/0200project/base-tx-explain/base-transaction-decoder

Clone the repo

git clone --depth 1 https://github.com/0200project/base-tx-explain

Made for: Claude Code, Codex, Cursor.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

base-transaction-decoder 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 yesterday.

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.

server.json · 6 lines

What it actually says

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

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.

yesterday First seen · 6 lines scan A abcaa2908242

Subscribe to this mod's changes

base-transaction-decoder is an MCP server published in the GitHub repository 0200project/base-tx-explain (0 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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 2026-08-31.

Backend and APIs Data and AI base blockchain mcp mcp-server transaction-decoder x402

base-transaction-decoder

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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