MCP

Spraay Solana Gateway

plagtech/spraay-solana-gateway

HTTPregistry active

Summary

This gateway lets Claude batch send SOL or any SPL token to over 1,000 wallets in a single operation using the x402 payment protocol. You get tools for batch_send_sol, batch_send_token, quote estimation, and transaction status lookups. The interesting bit is that it runs on a pay-per-request model where you send USDC on Solana to pay for each API call, no accounts or API keys needed. Requests cost a penny for batch transfers and a tenth of a cent for quotes. If you're building an AI agent that needs to distribute tokens at scale on Solana, maybe for payroll, airdrops, or reward distribution, this gives you the primitives without managing your own batch transaction logic.

AI writes the code. CodeRabbit catches the slop.

Try For Free →

Lid closed, agents working

Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.

Try free for 7 days →

Block distraction from your iPhone for free

Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.

Block now (100% free) →

Granola, the best AI meeting recorder

Notes, actions and memory. Without a meeting bot. First month 100% off.

Download for free →

belt - the only tool your agent needs

belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...

one prompt install →

Free an open-source skills that make AI coding agents easier to understand, verify, and control.

Download for free →

Monitor with ease. Code with confidence.

Start Free Trial →

Agent, connect blockchain

Connect your Claude agent to live crypto prices and trading routes via 1inch

Get the MCP →

AI writes the code. CodeRabbit catches the slop.

Try For Free →

Lid closed, agents working

Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.

Try free for 7 days →

Block distraction from your iPhone for free

Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.

Block now (100% free) →

Granola, the best AI meeting recorder

Notes, actions and memory. Without a meeting bot. First month 100% off.

Download for free →

belt - the only tool your agent needs

belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...

one prompt install →

Free an open-source skills that make AI coding agents easier to understand, verify, and control.

Download for free →

Monitor with ease. Code with confidence.

Start Free Trial →

Agent, connect blockchain

Connect your Claude agent to live crypto prices and trading routes via 1inch

Get the MCP →

💧 Spraay Solana Gateway

x402-powered batch payment infrastructure for AI agents on Solana.

Any AI agent can batch send SOL, USDC, BONK, or any SPL token to 1,000+ wallets via the x402 payment protocol. No API keys. No accounts. Pay per request.

🏗️ Architecture

AI Agent (any framework)
    │
    ├── HTTP Request
    │
    ▼
┌──────────────────────────────────────────┐
│   Spraay Solana Gateway                  │
│   gateway-solana.spraay.app              │
│                                          │
│   @x402/express + @x402/svm             │
│   ┌─────────────┐  ┌──────────────┐     │
│   │ x402 Payment│  │ Solana Batch │     │
│   │ Middleware   │  │ Engine       │     │
│   └──────┬──────┘  └──────┬───────┘     │
│          │                │              │
│          ▼                ▼              │
│   USDC payment     Execute batch        │
│   verified via     SOL/SPL transfers    │
│   facilitator                           │
└──────────────────────────────────────────┘
    │
    ▼
Solana Network

📡 Endpoints

Endpoint	Method	Price	Description
`/solana/batch-send-sol`	POST	$0.01	Batch send SOL to multiple wallets
`/solana/batch-send-token`	POST	$0.01	Batch send any SPL token
`/solana/quote`	GET	$0.001	Get cost estimate
`/solana/status/:txid`	GET	$0.001	Check transaction status
`/health`	GET	Free	Health check
`/.well-known/x402`	GET	Free	x402 discovery manifest

🚀 Quick Start

1. Clone & Install

git clone https://github.com/plagtech/spraay-solana-gateway.git
cd spraay-solana-gateway
npm install

2. Configure

cp .env.example .env
# Edit .env with your treasury wallet and private key

3. Run

npm run dev    # development (auto-reload)
npm start      # production

📖 API Usage

Batch Send SOL

curl -X POST https://gateway-solana.spraay.app/solana/batch-send-sol \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <base64 payment proof>" \
  -d '{
    "recipients": [
      { "address": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM", "amount": 0.01 },
      { "address": "7S3P4HxJpyyigGzodYwHtCxZyUQe9JiBMHyLWP9SfKFJ", "amount": 0.02 }
    ]
  }'

Batch Send SPL Token

curl -X POST https://gateway-solana.spraay.app/solana/batch-send-token \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <base64 payment proof>" \
  -d '{
    "mint": "DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263",
    "recipients": [
      { "address": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM", "amount": 1000 },
      { "address": "7S3P4HxJpyyigGzodYwHtCxZyUQe9JiBMHyLWP9SfKFJ", "amount": 500 }
    ]
  }'

Get Quote

curl "https://gateway-solana.spraay.app/solana/quote?recipients=100&token=BONK"

🔐 x402 Payment Flow

Agent sends request without payment header
Gateway returns 402 Payment Required with Solana USDC payment instructions
Agent sends USDC on Solana to the treasury address
Agent retries request with payment proof in X-PAYMENT header
Gateway verifies payment via facilitator, executes batch transfer

Supported facilitators:

Devnet: https://x402.org/facilitator
Mainnet: https://facilitator.payai.network (PayAI — free tx fees)

🤖 MCP Server

The gateway includes an MCP server for AI agent framework integration:

# Install MCP SDK
npm install @modelcontextprotocol/sdk

# Run MCP server
node mcp/spraay-solana-mcp.js

Tools available:

spraay_solana_batch_send_sol — Batch send SOL
spraay_solana_batch_send_token — Batch send SPL tokens
spraay_solana_quote — Cost estimation
spraay_solana_tx_status — Transaction lookup

🌐 Deployment

Railway

Create new service in Railway project
Connect GitHub repo: plagtech/spraay-solana-gateway
Set environment variables in Railway dashboard
Deploy → configure custom domain

DNS (GoDaddy)

Type: CNAME
Name: gateway-solana
Value: <railway-app-url>.railway.app
TTL: 600

🔗 Spraay Ecosystem

Service	URL
Spraay App	spraay.app
Base Gateway	gateway.spraay.app
Solana Gateway	gateway-solana.spraay.app
GitHub	github.com/plagtech
Twitter	@Spraay_app

📄 License

MIT

Featured

AI writes the code. CodeRabbit catches the slop.

Try For Free →

Lid closed, agents working

Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.

Try free for 7 days →

Block distraction from your iPhone for free

Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.

Block now (100% free) →

Granola, the best AI meeting recorder

Notes, actions and memory. Without a meeting bot. First month 100% off.

Download for free →

belt - the only tool your agent needs

belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...

one prompt install →

Free an open-source skills that make AI coding agents easier to understand, verify, and control.

Download for free →

Monitor with ease. Code with confidence.

Start Free Trial →

Agent, connect blockchain

Connect your Claude agent to live crypto prices and trading routes via 1inch

Get the MCP →

Categories

AI & LLM Tools Finance & Commerce

Registryactive

TransportHTTP

UpdatedFeb 28, 2026

Related AI & LLM Tools MCP Servers

ponder-surveys/dreamwork

AI job search agent — browse listings, generate packs, auto-apply

pquattro/memoraeu

Zero-knowledge persistent memory layer for AI agents. Encrypted client-side, hosted in France.

pro.pixeldrive/pixeldrive

Generate branded images at scale: design templates and render them to PNGs by prompt.

promptfax/promptfax

PromptFax is a pay-per-use remote MCP server that lets an AI assistant send a real fax to a US fax number. Your assistant uploads a PDF or image, enters the destination, reviews a quote, opens Stripe Checkout, and queues the transmission. Pricing is $2.00 for the first 5 pages, then $0.10 per page after that, capped at $4.50 for up to 35 pages. Payment is captured only after the fax is recorded as delivered. There is no PromptFax account, no subscription, and no API key to manage. PromptFax uses OAuth and Streamable HTTP, so users install once and their assistant can start a fax workflow when needed. Inside ChatGPT, PromptFax opens a connector widget that handles document review, destination entry, Stripe Checkout, and the delivery report. Inside Claude or other MCP hosts, PromptFax falls back to an agent-friendly hosted session page that handles the same flow without requiring the host to pass files directly. Every real send requires a user-reviewed quote and Stripe authorization. The assistant cannot silently complete a fax. The `send_fax` and `cancel` tools are marked as destructive so well-behaved MCP hosts can surface confirmation steps. ## Capabilities - Send outbound faxes to US fax numbers - Attach a PDF or image from the host, widget, hosted session page, or HTTPS URL - Generate a pay-per-use quote before payment - Open Stripe Checkout for payment authorization - Queue a paid fax for transmission - Check workflow, payment, and delivery status - Retry eligible failed faxes - Cancel an active send while cancellation is still possible ## Tools - `start_session` — Create or resume a PromptFax MCP session. - `attach_document` — Bind a PromptFax document or HTTPS PDF URLs to an MCP session. - `get_quote` — Create a fax quote from a session, document, or HTTPS PDF URL. - `checkout` — Open Stripe Checkout after the user accepts a quote. - `send_fax` — Queue a paid fax for transmission. - `get_status` — Fetch workflow, payment, and transmission status. - `retry_failed_fax` — Prepare a retry flow after a retry-eligible failed fax. - `cancel` — Cancel the active send while cancellation is still possible. ## Common use cases - Sending a one-off medical record, referral, or intake form to a clinic's fax line. - Returning a signed contract to a small business or law office that still operates by fax. - Sending insurance claim forms, prior-authorization paperwork, or appeal letters. - Sending a benefits or HR form to a payroll vendor that requires fax submission. - Sending court filings or notarized documents to a filing office. ## Data handling PromptFax does not require an email address, does not provision a PromptFax account, and stores uploaded documents only as long as the fax workflow needs them. Server-side working copies are deleted after transmission. The browser-local delivery report persists for up to 24 hours unless cleared sooner. PromptFax is outbound-only and currently supports US fax numbers only. Payments are processed by Stripe for Cogint Labs LLC. ## Links - Homepage: https://promptfax.app/ - MCP endpoint: https://promptfax.app/mcp - Setup docs: https://promptfax.app/mcp-setup - Tool catalog: https://promptfax.app/mcp-tools - Demo: https://promptfax.app/mcp-demo - Pricing: https://promptfax.app/pricing - Privacy: https://promptfax.app/privacy - Terms: https://promptfax.app/terms

promptfax/promptfax-d2a8bd34

PromptFax is a pay-per-use remote MCP server that lets an AI assistant send a real fax to a US fax number. Your assistant uploads a PDF or image, enters the destination, reviews a quote, opens Stripe Checkout, and queues the transmission. Pricing is $2.00 for the first 5 pages, then $0.10 per page after that, capped at $4.50 for up to 35 pages. Payment is captured only after the fax is recorded as delivered. There is no PromptFax account, no subscription, and no API key to manage. PromptFax uses OAuth and Streamable HTTP, so users install once and their assistant can start a fax workflow when needed. Inside ChatGPT, PromptFax opens a connector widget that handles document review, destination entry, Stripe Checkout, and the delivery report. Inside Claude or other MCP hosts, PromptFax falls back to an agent-friendly hosted session page that handles the same flow without requiring the host to pass files directly. Every real send requires a user-reviewed quote and Stripe authorization. The assistant cannot silently complete a fax. The `send_fax` and `cancel` tools are marked as destructive so well-behaved MCP hosts can surface confirmation steps. ## Capabilities - Send outbound faxes to US fax numbers - Attach a PDF or image from the host, widget, hosted session page, or HTTPS URL - Generate a pay-per-use quote before payment - Open Stripe Checkout for payment authorization - Queue a paid fax for transmission - Check workflow, payment, and delivery status - Retry eligible failed faxes - Cancel an active send while cancellation is still possible ## Tools - `start_session` — Create or resume a PromptFax MCP session. - `attach_document` — Bind a PromptFax document or HTTPS PDF URLs to an MCP session. - `get_quote` — Create a fax quote from a session, document, or HTTPS PDF URL. - `checkout` — Open Stripe Checkout after the user accepts a quote. - `send_fax` — Queue a paid fax for transmission. - `get_status` — Fetch workflow, payment, and transmission status. - `retry_failed_fax` — Prepare a retry flow after a retry-eligible failed fax. - `cancel` — Cancel the active send while cancellation is still possible. ## Common use cases - Sending a one-off medical record, referral, or intake form to a clinic's fax line. - Returning a signed contract to a small business or law office that still operates by fax. - Sending insurance claim forms, prior-authorization paperwork, or appeal letters. - Sending a benefits or HR form to a payroll vendor that requires fax submission. - Sending court filings or notarized documents to a filing office. ## Data handling PromptFax does not require an email address, does not provision a PromptFax account, and stores uploaded documents only as long as the fax workflow needs them. Server-side working copies are deleted after transmission. The browser-local delivery report persists for up to 24 hours unless cleared sooner. PromptFax is outbound-only and currently supports US fax numbers only. Payments are processed by Stripe for Cogint Labs LLC. ## Links - Homepage: https://promptfax.app/ - MCP endpoint: https://promptfax.app/mcp - Setup docs: https://promptfax.app/mcp-setup - Tool catalog: https://promptfax.app/mcp-tools - Demo: https://promptfax.app/mcp-demo - Pricing: https://promptfax.app/pricing - Privacy: https://promptfax.app/privacy - Terms: https://promptfax.app/terms

pure-maple/modelmux

Model multiplexer — route tasks to Codex, Gemini, and Claude CLIs with smart routing.