Add Spraay x402 Gateway integration

integrations/spraay.md

@@ -0,0 +1,62 @@
+---
+layout: integration
+name: Spraay x402 Gateway
+description: Multi-chain batch payments, balance checks, RPC calls, and oracle prices for Haystack agents and pipelines via the Spraay x402 gateway. Supports 15+ blockchains including Base, Ethereum, Solana, Stellar, and XRP Ledger.
+authors:
+  - name: plagtech
+    socials:
+      github: plagtech
+      twitter: Spraay_app
+pypi: https://pypi.org/project/haystack-spraay/
+repo: https://github.com/plagtech/haystack-spraay
+report_issue: https://github.com/plagtech/haystack-spraay/issues
+type: Tool Integration
+logo: /logos/spraay.png
+version: Haystack 2.0
+---
+## Overview
+
+`haystack-spraay` provides Haystack components and tools for interacting with the [Spraay x402 Gateway](https://gateway.spraay.app) — a multi-chain batch payment protocol that lets AI agents make USDC micropayments across 16+ blockchains using the [x402 HTTP payment protocol](https://github.com/coinbase/x402).
+
+## Installation
+```bash
+pip install haystack-spraay
+```
+
+## Usage with Haystack Agent
+```python
+from haystack.components.agents import Agent
+from haystack.components.generators.chat import OpenAIChatGenerator
+from haystack.dataclasses import ChatMessage
+from haystack_spraay.tools import spraay_batch_payment, spraay_check_balance
+
+agent = Agent(
+    chat_generator=OpenAIChatGenerator(model="gpt-4o-mini"),
+    tools=[spraay_batch_payment, spraay_check_balance],
+    system_prompt="You are a blockchain payment assistant.",
+)
+
+result = agent.run(
+    messages=[ChatMessage.from_user("Check the USDC balance of 0xAd62...")]
+)
+```
+
+## Usage as Pipeline Components
+```python
+from haystack_spraay.components import SpraayBalanceCheck
+
+balance = SpraayBalanceCheck(chain="base")
+result = balance.run(address="0xAd62f03C7514bb8c51f1eA70C2b75C37404695c8")
+```
+
+## Components
+
+- **SpraayBatchPayment**: Send batch USDC payments to multiple recipients
+- **SpraayBalanceCheck**: Check token balances on any chain
+- **SpraayGasPrice**: Get real-time gas prices
+- **SpraayRPCCall**: Make raw JSON-RPC calls
+- **SpraayOraclePrice**: Get real-time token prices
+
+## Supported Chains
+
+Base, Ethereum, Arbitrum, Polygon, BNB Chain, Avalanche, Solana, Stellar, XRP Ledger, Bitcoin, BOB, Unichain, Plasma, Bittensor, Stacks.