Mr Hamlin

Posted on Mar 15

x402 Just Got Real — Here's the Gateway With 70 Endpoints Your Agent Can Pay For Today

#x402 #ai #web3 #agents

x402 Went From Experiment to Industry Standard

In early 2026, x402 crossed a threshold.

Stripe launched x402 payments on Base in February, letting developers charge AI agents directly in USDC. Google released the Agent Payments Protocol (AP2), with x402 as its first crypto extension — built alongside Coinbase, MetaMask, and the Ethereum Foundation. Cloudflare co-founded the x402 Foundation with Coinbase and shipped native x402 support into their Agents SDK, including paidTool for charging per MCP tool call. x402 V2 dropped with wallet-based sessions, automatic API discovery, and a modular plugin SDK.

The infrastructure players have placed their bets. x402 is becoming the payment rail for the agent economy.

But if you're a developer building an AI agent right now, a fair question remains: what can your agent actually buy with x402 today?

Spraay: 70 Endpoints, 12 Categories, One Payment Protocol

Spraay is an x402 payment gateway live at gateway.spraay.app. It exposes 70 pay-per-call endpoints across 12 categories — all payable in USDC on Base. No API keys. No accounts. No subscriptions.

Your AI agent sends a request, gets a 402 response with pricing, pays in USDC, and receives the data. That's it.

Here's what's available:

Data & Intelligence

Oracle — real-time price feeds, gas estimates, FX rates ($0.008)
Analytics — wallet scoring, portfolio analysis, risk profiling ($0.01)
AI Inference — 93 models across dual providers: BlockRun (43 models) + OpenRouter (50 models) ($0.04)
Indexer — cross-chain tx history, balances, NFTs ($0.008)

Financial Primitives

Batch Payments — multi-recipient token transfers across 11 chains ($0.02)
Escrow — milestone-based, time-locked conditional payments ($0.10)
Swap — atomic quotes & execution via Uniswap V3 / Aerodrome ($0.008)
Bridge — cross-chain token transfers across Spraay's 11-chain footprint ($0.05)
Payroll — recurring batch payments powered by StablePay ($0.10)
Invoice — on-demand generation with payment tracking ($0.05)

GPU / Compute

GPU Run — image gen, video, LLM, audio via Replicate with 13 model shortcuts ($0.06)
GPU Status — poll async job results ($0.005)
GPU Models — browse available models (free)

Search / RAG

Web Search — LLM-ready results via Tavily ($0.02)
Extract — pull clean content from URLs for RAG pipelines ($0.02)
Q&A — synthesized answers with cited sources ($0.03)

Communication

Email — payment confirmations, alerts, receipts via AgentMail ($0.01)
XMTP Relay — agent-to-agent encrypted messaging ($0.01)
Webhook — event forwarding for tx confirmations ($0.01)

Robotics (RTP) — 6 Live Endpoints

This is new. Spraay implements the Robot Task Protocol (RTP), an open standard for AI agents to discover, commission, and pay for physical robot tasks via x402.

Register Robot — register capabilities, pricing, connection config (free)
Dispatch Task — pay x402 to send a task, escrow holds until completion ($0.05)
Complete Task — robot reports result, escrow releases or refunds (free)
Discover Robots — filter by capability, chain, price, status ($0.005)
Task Status — poll lifecycle: PENDING → DISPATCHED → COMPLETED ($0.002)
Robot Profile — full capability and pricing details ($0.002)

Infrastructure

RPC — premium multi-chain RPC via Alchemy, 7 chains ($0.001)
IPFS/Arweave — permanent storage via Pinata ($0.01)
Cron/Scheduler — recurring payments, DCA triggers ($0.01)
Logging — structured log ingestion for debugging agent workflows ($0.002)

Identity, Compliance & More

KYC/KYB — compliance-gated identity verification ($0.08)
Auth/SSO — pay-per-session auth proxy ($0.01)
Audit Trail — immutable payment logs for enterprise reporting ($0.03)
Tax — per-request crypto tax calculation ($0.08)

Why This Matters for Agent Builders

Most x402 content is still theoretical. Spraay is operational. If you're building on LangChain, CrewAI, Google ADK, Cloudflare Agents, or any MCP-compatible framework, these are endpoints you can hit today:

# Your agent needs to pay 5 contributors
POST gateway.spraay.app/api/v1/batch

# Your agent needs Claude or GPT-4o inference
POST gateway.spraay.app/api/v1/ai/chat

# Your agent needs to search the web
POST gateway.spraay.app/api/v1/search/web

# Your agent needs to run an image model on GPU
POST gateway.spraay.app/api/v1/gpu/run

# Your agent needs to dispatch a robot task
POST gateway.spraay.app/api/v1/robots/task

One gateway. One payment protocol. 70 capabilities.

The MCP Server: 60+ Tools

Spraay ships an MCP server with 60+ tools — listed on the Official MCP Registry, Smithery, and integrated with Goose. If your agent framework supports MCP (Claude, Cursor, Windsurf, Google ADK, Cloudflare Agents SDK), your agent gets access to the full endpoint catalog through tool discovery.

The flow:

Agent discovers available tools via MCP
Selects the right tool for its task
Pays via x402 on Base
Receives the result

No custom integration code. No SDK to install.

Quick Start

Option 1: Direct x402 requests

import { createClient } from "x402-client";

const client = createClient({
  baseUrl: "https://gateway.spraay.app",
  privateKey: process.env.EVM_PRIVATE_KEY,  // Wallet with USDC on Base
});

// Fetch live ETH price — pays $0.008 USDC automatically
const prices = await client.get("/api/v1/prices");

// Batch send USDC to multiple wallets — pays $0.02 USDC
const tx = await client.post("/api/v1/batch", {
  token: "USDC",
  recipients: [
    { address: "0xabc...", amount: "10.00" },
    { address: "0xdef...", amount: "20.00" }
  ]
});

Option 2: MCP tool discovery

{
  "mcpServers": {
    "spraay": {
      "url": "https://smithery.ai/server/@plagtech/spraay-x402-mcp"
    }
  }
}

Your agent will automatically discover all 60+ tools with x402 payment handling built in.

What's Next

Spraay is actively expanding:

More chains — already live on 11 chains (Base, Ethereum, Arbitrum, Polygon, Solana, BNB, Avalanche, and more), with SUI and Stacks deployments next
ProofLayer — on-chain trust scores and behavioral attestations for AI agents
Virtuals Protocol ACP — registered as a service provider for agent-to-agent commerce
Pricing refinements — optimizing tiers across AI inference, escrow, and oracle endpoints

The x402 ecosystem is still early — recent data shows the protocol processing modest daily volumes as real use cases ramp up. But the infrastructure is here. Stripe, Google, and Cloudflare have validated the standard. Now it needs endpoints worth paying for.

Spraay is building those endpoints.

Links:

🌐 Gateway: gateway.spraay.app
📖 Docs: docs.spraay.app
🔧 MCP Server: @plagtech/spraay-x402-mcp
🤖 RTP Spec: github.com/plagtech/rtp-spec
🐦 Twitter: @Spraay_app
💻 GitHub: github.com/plagtech
💧 Built on Base

If you're building AI agents that need to transact, Spraay gives you 70 endpoints to start with x402.

DEV Community