Portfolios, transactions, DeFi positions, PnL, across 38+ chains.
npm install -g zerion-cli
No API key. No signup. Agents pay $0.01 USDC per request on Base. Payment = access.
GET api.zerion.io/v1/*
Get an API key for higher rate limits and production use. Also works via MCP server.
Authorization: Basic {YOUR_API_KEY}
Works with: Claude Code, Codex, Cursor, Cowork, and any x402 or MCP-compatible agent
From raw blockchain to agent-ready insights
Everything an agent needs to understand any crypto wallet
Explore all endpoints, parameters and response schemas in the docs
Production-grade data infrastructure, agent-ready
HTTP 402 Payment Required as a native payment flow
Request data
Agent sends GET request to x402 endpoint
Receive 402
Server returns payment details (amount, USDC, Base)
Sign payment
Agent signs USDC authorization via ERC-3009
Get data
Retry with payment header, receive data + receipt
Request data
Agent sends GET request to x402 endpoint
Receive 402
Server returns payment details (amount, USDC, Base)
Sign payment
Agent signs USDC authorization via ERC-3009
Get data
Retry with payment header, receive data + receipt
Everything you need to get started
Get your free API key in seconds. No credit card required.
