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Coin Railz Portfolio Tracker
x402
Coin Railz Portfolio Tracker is a paid API for AI agents from coinrailz.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-15).
Returns real-time token holdings and total USD value for a wallet address across multiple EVM chains
Price / call$0.5
Success—
StatusUnknown
How this service works
Real-time multi-chain portfolio valuation - infrastructure for portfolio management agents (B2B2C infrastructure)
Output
Returns an array of token holdings across the specified chains (including token name, amount, and chain) plus a totalValueUsd number representing the aggregate portfolio value in US dollars.
Example use cases
Track agent portfolio value updates
“Can you check my wallet holdings on Ethereum, Base, and Polygon right now and tell me what my total portfolio is worth in USD? I want to see all the tokens I'm holding and their current values.”
Monitor multi-chain DeFi position risk
“Show me the real-time USD value of all my tokens across Ethereum and Polygon — I need to see my complete portfolio snapshot to decide if I should rebalance my positions.”
Reconcile portfolio across exchanges
“I just moved some tokens around — can you pull my current holdings across Base, Polygon, and Ethereum and give me the total value in dollars so I know exactly what I have across all chains?”
Technical details
Endpoint
POSThttps://coinrailz.com/x402/service/portfolio-trackerWhen to prefer
Use this endpoint when you need a real-time, multi-chain snapshot of a wallet's token portfolio value in USD — especially when supporting portfolio management agents that need to aggregate holdings across Ethereum, Base, Polygon, and other EVM chains in a single call. Prefer over single-chain balance endpoints when cross-chain aggregation is needed.
Side effects
- Invalid or malformed wallet address returns an error
- Unsupported chain name in the chains array causes a validation error
- Wallet with no holdings returns empty holdings array and zero totalValueUsd
- Network or RPC timeout for a specific chain may return partial results
- Payment failure (insufficient USDC) blocks the request entirely
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chains | array | Chains to track (default: ethereum, base, polygon) |
| walletAddressrequired | string | Wallet address to track |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| holdings | array | Token holdings across chains |
| totalValueUsd | number | Total portfolio value in USD |
Tags
x402
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