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polymer-pay-x402engine-chain

Route blockchain data requests through the Polymer Pay proxy with an API key.

1|2|Updated Mar 2, 2026
Search Tags:#blockchain#transactions#proxy#wallet#ens#polymer-pay#pay-per-use
One-click install
npx skills add https://github.com/polymerdao/pay-apis --skill polymer-pay-x402engine-chain
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: polymer-pay-x402engine-chain
Source: https://github.com/polymerdao/pay-apis/tree/main/skills/polymer-pay-x402engine-chain
Command: npx skills add https://github.com/polymerdao/pay-apis --skill polymer-pay-x402engine-chain

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Provides pay-per-use access to essential blockchain operations by routing requests through the Polymer Pay proxy, enabling wallet analytics, ENS resolution, token metadata, and transaction simulation without exposing direct API keys.

Core Features & Use Cases

  • Wallet Balances: Retrieve token balances for a wallet across supported chains.
  • Wallet Transactions: Fetch recent transaction history for a wallet address.
  • Wallet PnL: Analyze profit and loss per token for a given wallet.
  • ENS Resolve & Reverse: Resolve ENS names to addresses and reverse-resolve addresses to ENS names.
  • Token Prices & Metadata: Get current token prices and metadata (batch capable).
  • Transaction Simulation: Preview the outcome of a transaction before sending.

Quick Start

Call the x402engine-chain endpoints through the Polymer Pay proxy and include your API key in every request.

Frequently Asked Questions about polymer-pay-x402engine-chain

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I query wallet balances and transactions without managing API keys directly?▼

You can retrieve wallet balances and transaction history without direct API key management by routing requests through the Polymer Pay proxy. Developers include an x-polymer-pay-api-key header to access pay-per-use blockchain analytics across supported chains.

What is the best way to resolve ENS names to addresses for blockchain transactions?▼

ENS resolution maps human-readable names to wallet addresses for blockchain transactions. This Skill provides ENS resolve and reverse-lookup capabilities via the Polymer Pay proxy, returning addresses or names without requiring direct node access.

Can I simulate blockchain transactions before sending them to the network?▼

Yes, transaction simulation allows you to preview the outcome of a blockchain transaction before sending it. Requests route through the Polymer Pay proxy endpoint to execute the preview and return expected results.

How do I analyze wallet PnL and fetch token prices across multiple chains?▼

You analyze wallet PnL and fetch token prices by sending requests to the x402engine-chain endpoints through the Polymer Pay proxy. It returns profit and loss per token and batch-capable current token metadata.

Do I need a direct blockchain node or API key to fetch token metadata?▼

No, you do not need a direct blockchain node or exposed API key to fetch token metadata. The Skill uses a pay-per-use proxy model, requiring only the x-polymer-pay-api-key header to access current token prices and metadata.

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