skills.rest
davepoon
davepoonCOMMUNITY
Explore all skills by this author →
Website𝕏@davepoonGitHub

hexanon-x402-apis

Call eight pay-per-call x402 HTTP APIs with USDC micropayments on Base.

3.4k|487|Updated Jul 25, 2025
Search Tags:#api#autonomous agents#micropayments#x402#usdc#base#pay-per-call
One-click install
npx skills add https://github.com/davepoon/buildwithclaude --skill hexanon-x402-apis
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: hexanon-x402-apis
Source: https://github.com/davepoon/buildwithclaude/tree/main/plugins/all-skills/skills/hexanon-x402-apis
Command: npx skills add https://github.com/davepoon/buildwithclaude --skill hexanon-x402-apis

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires @x402/fetch, @x402/evm, viem.

What problem does it solve?

Autonomous agents often need external data like vehicle history, market signals, or trending repositories, but most APIs require accounts, API keys, and subscriptions. This Skill gives agents direct pay-per-call access to eight x402 APIs using USDC micropayments on Base, with no signup or API keys.

Core Features & Use Cases

  • Eight Specialized APIs: Vindex (vehicle/VIN intelligence), Demandex (e-commerce demand signals), OrcaTrace (Polymarket whale intelligence), gitBeacon (GitHub trending repos), Signalis (narrative intelligence), Moltalyzer (Moltbook digests), x402lint (x402 conformance scanning), and Isocast (Polymarket weather-market signals).
  • x402 Payment Flow: Probe any paid route unauthenticated to receive an HTTP 402 challenge with exact price, pay with an x402 client like @x402/fetch, and retry the request.
  • Free Preview Routes: Every API exposes free sample or index endpoints so agents can inspect response shapes before spending USDC.
  • Use Case: An agent asked to evaluate a used car can call Vindex to decode the VIN, fetch merged US/Canada recalls, and retrieve known issues and a pre-purchase report for a few cents per call.

Quick Start

Ask the agent to decode a VIN and check recalls using the Vindex API, funding a Base wallet with USDC first if paid endpoints are needed.

Frequently Asked Questions about hexanon-x402-apis

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

FAQPage Schema
How do I call an x402 API from an autonomous agent?▼

Probe the paid route unauthenticated to receive an HTTP 402 challenge containing the exact price, asset, network, and pay-to address. Then pay using a pinned x402 client library like @x402/fetch with your wallet signer and retry the request.

What APIs are included in the Hexanon x402 family?▼

Eight APIs are included: Vindex for vehicle and VIN intelligence, Demandex for e-commerce demand signals, OrcaTrace for Polymarket whale intelligence, gitBeacon for GitHub trending repos, Signalis for narrative intelligence, Moltalyzer for Moltbook digests, x402lint for x402 conformance scanning, and Isocast for Polymarket weather-market signals.

Do I need an API key or account to use these x402 APIs?▼

No accounts or API keys are required. Payment happens per call via USDC micropayments on Base (eip155:8453) through the x402 protocol, and free sample routes need no wallet at all.

How do I set up a wallet for x402 USDC payments on Base?▼

Fund a Base (eip155:8453) wallet with USDC and provision its key to your agent before enabling paid calls. Wallet setup is a human step; free routes require no wallet.

Can I preview API responses before paying for x402 endpoints?▼

Yes, every API exposes free sample or index routes so you can inspect response shapes before spending anything. The live 402 challenge on each route always shows the exact current price before your client pays.

What are the limitations of the endpoint pricing snapshot?▼

The documented prices are a reviewed snapshot and may drift over time. The 402 challenge returned at call time is always the exact current price, so a stale snapshot can never overcharge you.

Related Skills

Explore More Software Engineering Skills→
browser-usebrowser-use
111.9k

x402

Configure Browser Use Cloud payments via x402 crypto wallet protocol.

Official
Advanced
Michae2xlMichae2xl

market-research

Conduct market research, competitive analysis, and investor due diligence with source-attributed summaries.

Community
Advanced
AgriciDanielAgriciDaniel
16.0k

seo-dataforseo

Fetches live SERP, keyword, backlink, and AI visibility data via the DataForSEO MCP server.

Community
Advanced
moonpaymoonpay
110

corbits-marketplace

Discover and pay for premium API proxies with per-request USDC micropayments.

Official
Intermediate