feat: Add Spraay batch payment crew - Batch payments on Base

[plagtech]

Spraay Batch Payment Crew

Adds a new crew example demonstrating AI agents for batch cryptocurrency payments on Base.

What this example shows

• Creating custom CrewAI tools using BaseTool with Pydantic schemas
• Multi-agent sequential workflow (Planner → Executor → Reporter)
• Real smart contract interaction via web3.py
• Input validation and error handling for blockchain operations

Use case

Batch payments for payroll, airdrops, DAO distributions, and grants. Up to 200 recipients in a single transaction with ~80% gas savings.

Files

• crews/spraay_batch_payments/spraay_batch_payment_crew.py
• crews/spraay_batch_payments/README.md

Dependencies

crewai, crewai-tools, web3

Contract: 0x1646452F98E36A3c9Cfc3eDD8868221E207B5eEC (Base mainnet)

[plagtech]

Update — March 2026

Spraay x402 Gateway has expanded significantly since this PR was opened:

62 paid endpoints across 8 categories (up from 6):

• AI Chat (200+ models via OpenRouter)
• Batch Payments (200 recipients/tx)
• DeFi (Uniswap V3 swaps)
• Price Oracle / Gas / FX
• Cross-chain Bridge (11 chains)
• Payroll, Invoicing, Escrow
• Wallet Analytics, AI Inference
• NEW: GPU/Compute — image gen, video, LLMs, audio via Replicate ($0.05/call)
• NEW: Search/RAG — web search, content extraction, Q&A via Tavily ($0.01-$0.02/call)
• Communication (email, SMS, webhooks, XMTP)
• Infrastructure (RPC, IPFS, cron, logging)
• Identity (KYC, auth/SSO)
• Compliance (audit trail, tax)

63-tool MCP server on Smithery: @plagtech/spraay-x402-mcp
Developer docs: https://docs.spraay.app
Gateway: https://gateway.spraay.app

All endpoints are x402-native — agents pay USDC per request on Base. No API keys, no accounts.