x402 API marketplace skill for lobster.cash agents. Pay-per-call access to a continuously growing catalog of verified APIs.
Browse the marketplace → · Get a wallet → · Compatibility guide →
--- ## Quick Start ### 1. Install the lobster.cash wallet (if you haven't already) ```bash openclaw plugins install @crossmint/lobster.cash ``` Then tell your agent: *"Set up my wallet"* — open the consent link and approve. ### 2. Install the Dexter marketplace skill ```bash openclaw plugins install @dexterai/dexter-lobster ``` ### 3. Start using paid APIs Ask your agent: - *"What smart money wallets are buying right now?"* - *"Scan this token contract for honeypots"* - *"Get Polymarket odds on the next election"* - *"Run this prompt through Claude via OpenRouter"* The skill searches the Dexter bazaar, shows you pricing, and when you want to call an endpoint, lobster.cash handles the payment through the Dexter facilitator. ## How It Works ``` Agent → dexter-lobster skill → Dexter Bazaar (search / pricing) → lobster.cash (payment delegation) → x402.dexter.cash (settlement) → Solana (on-chain) ``` **Search** and **pricing** are free. When the agent calls a paid endpoint, it describes the payment intent and [lobster.cash](https://lobster.cash) handles execution through the Dexter facilitator. The skill never touches private keys, never builds transactions, never signs anything. ## What's Available The Dexter bazaar indexes x402 endpoints from across the ecosystem. Featured providers include Nansen, Alchemy, Allium, CoinGecko, OpenRouter, Exa, Dome, Quick Intel, Quicknode, Laso Finance, and many more -- covering DeFi analytics, AI/LLM inference, prediction markets, blockchain infrastructure, security scanning, person/company intelligence, payments, and document parsing. The catalog grows automatically. New endpoints are crawled from facilitator discovery feeds every 2 hours, auto-named by AI, and quality-verified with paid test calls every 24 hours. Run `./scripts/x402.sh categories` to see the current breakdown. ## Get Your API Listed Any x402-enabled endpoint can appear in the Dexter bazaar. Here's how: 1. **Make your API x402-compliant** — return HTTP 402 with an `accepts` array containing your pricing, asset (USDC), network, and `payTo` wallet. Use `@dexterai/x402` server middleware or any x402-compatible stack. 2. **Facilitate through a known facilitator** — endpoints that settle through [x402.dexter.cash](https://x402.dexter.cash), [Coinbase CDP](https://api.cdp.coinbase.com), [PayAI](https://facilitator.payai.network), or [Ultraviolet](https://facilitator.ultravioletadao.xyz) are automatically crawled every 2 hours. 3. **Wait for ingestion** — once crawled, Dexter's AI auto-namer generates a display name, description, and category for your endpoint. The quality verifier then pays for a real call, generates realistic test inputs using AI, scores the response quality (0–100), and writes detailed notes. 4. **Pass quality verification** — endpoints scoring 75+ are auto-approved for the marketplace. Below 50 gets flagged for review. The verifier re-tests every 24 hours so quality stays current. 5. **Optional: register directly** — submit your endpoint URL via `POST /api/x402/resources/register` on `api.dexter.cash` to skip waiting for the next crawl cycle. ## Facilitator Settlement runs through [x402.dexter.cash](https://x402.dexter.cash): - **Gas-sponsored** — you pay $0 in SOL/ETH - **Smart wallet support** — PDA wallets (Crossmint, Squads) via simulation-based CPI verification - **Multi-network** — Solana, Base, Polygon, Arbitrum, Optimism, SKALE - **x402 v1 + v2** — backward-compatible with both protocol versions ## lobster.cash Compatibility Built to the [lobster.cash skill compatibility guide](https://lobster.cash/docs/skill-compatibility-guide): - Wallet precheck before every payment - Payment intent description — not execution - Full error handling (insufficient balance, wallet not configured, payment failure) - Zero key handling — all wallet operations delegated to lobster.cash ## Repo Structure ``` skills/SKILL.md ← what the agent reads openclaw.plugin.json ← plugin manifest _meta.json ← registry metadata scripts/x402.sh ← CLI for search & pricing references/ api-endpoints.md ← bazaar API docs categories.md ← category breakdown ``` ## Links | | | |---|---| | **Marketplace** | [dexter.cash/marketplace](https://dexter.cash/marketplace) | | **Facilitator** | [x402.dexter.cash](https://x402.dexter.cash) | | **Agent Wallet** | [lobster.cash](https://lobster.cash) | | **x402 SDK** | [@dexterai/x402](https://www.npmjs.com/package/@dexterai/x402) | | **Register an API** | `POST api.dexter.cash/api/x402/resources/register` | | **Compatibility Guide** | [lobster.cash/docs/skill-compatibility-guide](https://lobster.cash/docs/skill-compatibility-guide) |