0200project

Now live: base-tx-explain

Tools for autonomous AI agents.

0200project builds machine-native infrastructure that allows AI agents to discover, use, and pay for reliable tools automatically.

Explore Tools GitHub

MCP-native/deterministic decode/$0.02 per call

agent sessionbase mainnet · replay
$ tools/call explain_transaction 0x0c84…4c8c
← 402 Payment Required · $0.02 USDC on Base
→ paid via x402 · retrying
{
"summary": "0x401d…f2c5 swapped
0.03 ETH for 12,899,422 WNL
via Uniswap V4 PoolManager.",
"action_type": "swap",
"status": "success",
"risk_flags": ["unverified_contract"],
"gas_paid_usd": 0.020562
}
$

Real output, replayed — from a live Base transaction.

What is 0200project?

Machine-native infrastructure for autonomous agents.

AI agents need reliable tools to understand data, interact with systems, and complete tasks without a human in the loop. 0200project builds those tools.

Deterministic by design

Same input, same output. No model in the response path — nothing to hallucinate, nothing to drift.

No accounts. No API keys.

Tools are paid per call in USDC via the x402 protocol. An agent can discover, pay, and retry entirely on its own.

Stable contracts

Strict JSON schemas, versioned and documented. Output is designed to be parsed blind by software, not skimmed by humans.

First tool

base-tx-explain

Blockchain transaction intelligence for AI agents. Raw onchain data is hostile to language models — logs, topics, calldata. base-tx-explain converts it into structured information an agent can act on.

inputtx_hash
0x0c84b951051f779903b57af9225ca570c77cd5531195968dd78106a69d6c4d8c
  • What happened, in plain English
  • Every asset that moved
  • Counterparties, labeled where known
  • Risk signals with evidence
Open playground Read the docs
outputtool result · strict JSON
{
  "summary": "0x401d…f2c5 swapped 0.03 ETH for
    12,899,422 WNL via Uniswap V4 PoolManager.",
  "action_type": "swap",
  "status": "success",
  "assets_moved": [
    { "token": "ETH",  "amount": "0.03" },
    { "token": "WNL",  "amount": "12899422.14…" }
  ],
  "counterparties": [
    { "label": "Uniswap V4 PoolManager" }
  ],
  "risk_flags": [
    { "flag": "unverified_contract" }
  ],
  "gas_paid_usd": 0.020562
}

Actual output for a live Base transaction, trimmed for width. Decoded deterministically from the receipt — byte-for-byte reproducible, no LLM in the response path.

Payments

Priced for machines, not seats.

Every tool is metered per call and settled in USDC on Base through the x402 protocol. The payment challenge is part of the response — a capable agent handles it without a signup form ever existing.

Non-custodial by construction: the facilitator verifies and settles but cannot move or redirect funds, and the server never touches a wallet or asks for a key.

  1. Call the toolFirst 10 calls per client are free. No registration.
  2. Receive a 402 challengeThe response carries exact price, asset, and recipient — everything needed to pay.
  3. Pay and retry$0.02 per call in USDC. The agent attaches proof of payment and retries autonomously.

Built for the machine economy.

Software is becoming the customer. 0200project builds the quiet infrastructure it will rely on.