Introducing OpenDexter: The x402 Search Engine for AI Agents
Dexter launches OpenDexter -- the first x402 search engine. Any AI agent can search 5,000+ paid APIs, check pricing, and pay with one call. Three access methods: MCP URL (zero install, session wallets), npm package (local wallet), or authenticated MCP (managed wallet). No account required.
Introducing OpenDexter: The x402 Search Engine for AI Agents
FOR IMMEDIATE RELEASE
Dexter Launches OpenDexter -- The First x402 Search Engine. Any Agent, Three Access Methods, No Account Required.
Search 5,000+ paid APIs. Pay with one call. No signup needed.
What is OpenDexter?
MARCH 2026 -- Dexter, the facilitator behind millions of x402 settlements, today introduces OpenDexter -- the x402 search engine for AI agents.
OpenDexter gives any AI agent instant access to the largest directory of paid x402 APIs in existence. Search over 5,000 endpoints across Solana, Base, Polygon, Arbitrum, Optimism, and Avalanche. Check pricing before you pay. Call any endpoint with automatic payment. No account, no API key, no signup.
Five tools. Three access methods. One marketplace.
Three Ways In
OpenDexter is available through three surfaces, each designed for a different use case:
1. The MCP URL (zero install)
https://open.dexter.cash/mcp
Point any MCP client at this URL and you're in. ChatGPT, Claude, Cursor, Windsurf, Cline -- anything that speaks MCP. No npm install, no login, no wallet setup. OpenDexter creates an ephemeral session wallet for each connection. Fund it with USDC and your agent can pay for any x402 API immediately.
2. The npm Package (local wallet)
npx @dexterai/opendexter install
One command installs OpenDexter into Cursor, Claude Code, Codex, VS Code, Windsurf, or Gemini CLI. Creates a local wallet at ~/.dexterai-mcp/wallet.json. Your keys stay on your machine -- no custodial risk, no session needed. Fund the wallet and go.
3. The Authenticated MCP (managed wallet)
https://mcp.dexter.cash/mcp
For users with Dexter accounts. Log in via OAuth and your existing Dexter managed wallet handles payments automatically. No wallet setup, no funding step. If you already use Dexter, this is the smoothest path.
Five Tools
Every OpenDexter surface ships the same core toolset:
| Tool | What it does |
|---|---|
| x402_search | Search the marketplace. Quality-ranked results with pricing, verification status, seller reputation, and volume data. |
| x402_check | Preview pricing for any endpoint without paying. See costs per chain before committing. |
| x402_fetch | Call any x402 API with automatic payment. Agent gets the response directly. |
| x402_pay | Call any x402 API with manual payment control. Two-phase flow for agents that manage their own signing. |
| x402_wallet | View wallet address and USDC balance. Know what you have before you spend. |
The x402 Search Engine
The agent economy has a discovery problem. Hundreds of paid APIs exist across multiple blockchains and facilitators, but agents have no standard way to find them.
OpenDexter solves this. One search tool gives your agent a live, quality-ranked marketplace with:
- 5,000+ indexed endpoints crawled from every major facilitator (Dexter, Coinbase, PayAI, and more)
- AI-powered quality scores -- every endpoint is automatically tested, scored, and re-verified
- Multi-signal ranking -- results ranked by quality, freshness, usage, seller trust, and reliability
- Seller reputation -- see who built each endpoint, their settlement history, and trust signals
- Real pricing -- exact USDC cost per call on every supported chain
- Fuzzy search -- typo-tolerant matching across names, descriptions, categories, and seller names
This is not a static list. It is a living, verified, ranked marketplace that gets smarter with every settlement.
Why OpenDexter?
Because the x402 ecosystem needed a front door that anyone could walk through.
Until now, discovering and paying for x402 APIs required either wiring up endpoints manually, using a specific facilitator's internal catalog, or having a Dexter account. OpenDexter removes all of those barriers.
Any agent. Any MCP client. No account. Just search, check, and pay.
About Dexter
Dexter is payment infrastructure for the AI economy. Operating the world's most-used x402 facilitator, Dexter powers millions of autonomous machine-to-machine payments across six blockchain networks. From facilitation to marketplace to proxy routing, Dexter handles the complete payment layer for agentic commerce.
$DEXTER | dexter.cash | @dexteraisol
Get Started
- OpenDexter MCP: open.dexter.cash/mcp
- npm Package:
npx @dexterai/opendexter install - Authenticated MCP: mcp.dexter.cash/mcp
- Browse the Marketplace: dexter.cash/marketplace
- Documentation: docs.dexter.cash
Media Contact: [email protected]
This announcement is for informational purposes only. Using paid APIs involves cost. Configure spending limits appropriate for your use case.