io.github.plagtech/spraay-x402-mcp
MCP server for Spraay x402 Gateway. 60 tools for crypto payments, DeFi, and AI on Base.
Open source Open in the app JSON README (API)
About
MCP server for Spraay x402 Gateway. 60 tools for crypto payments, DeFi, and AI on Base.
Details
- Kind
- MCP servers
- Topic
- Finance & crypto
- Publisher
- plagtech
- Origin
- official
- Category
- ferramentas
- Transport
- local
- Version
- 3.1.1
- Stars
- 2
- Forks
- 1
- Last push
- 2026-07-01T22:56:49Z
- Repository state
- ativo
- Language
- JavaScript
- License
- MIT
- Added
- 2026-08-29 04:01:12
- Updated
- 2026-08-29 04:01:12
- Origin id
io.github.plagtech/spraay-x402-mcp
README
<!--
============================================================================
COUNTS — confirmed against the live gateway manifest on 2026-07-01.
Source of truth: https://gateway.spraay.app/.well-known/x402.json
Gateway: 192 endpoints (160 paid + 32 free), 33 categories
MCP server: 183 tools (97 manual + 86 auto-generated)
This README uses 183 because it documents the MCP server, which exposes a
subset of gateway endpoints as tools. CONFIRM 183 before committing:
npm run sync
Select-String -Path src\auto-tools.ts -Pattern "server\.tool\(" | Measure-Object | % Count
# that is the auto count (86); add the manual count:
Select-String -Path src\index.ts -Pattern "^ server\.tool\(" | Measure-Object | % Count
If the sum differs from 183, do one find-replace of "183" here.
Keep this number in sync with: the GitHub repo Description, meta.json,
smithery.yaml, and the cursor.directory listing. Gateway-level surfaces use
192; MCP-server surfaces use 183.
============================================================================
-->
# 💧 Spraay x402 MCP Server
[](https://smithery.ai/servers/Plagtech/Spraay-x402-mcp)
[](https://opensource.org/licenses/MIT)
**Full-stack DeFi infrastructure for AI agents — 183 pay-per-call tools, backed by the 192-endpoint Spraay x402 Gateway on Base, with Solana, Ethereum, XRP, and Stellar payment rails.**
Connect Claude, Cursor, or any MCP client to onchain payments, batch payouts,
swaps, bridging, payroll, invoicing, escrow, oracle data, analytics, 200+ AI
models, GPU/compute, research APIs, search/RAG, and more. Agents pay USDC per
request via the [x402 protocol](https://x402.org) — no API keys, no accounts.
> The tool list is generated from the live gateway manifest at build time
> (`npm run sync`), so the authoritative catalog and pricing always live at the
> gateway — see [Tool catalog](#tool-catalog). 24 of the gateway's endpoints are
> **free** (no payment required).
---
## Quick Start
Install and go — **no config, no API keys, no env vars.** On first run the
server auto-creates a wallet, saves it to `~/.spraay/.session`, and prints the
address to stderr. Fund that address with USDC on Base and start calling tools.
**Read [Security & Wallet Safety](#security--wallet-safety) — these tools move
real funds.**
### One-line install (Claude Code)
```bash
claude mcp add spraay -s user -- npx -y spraay-x402-mcp
```
### Manual config (Cursor / Claude Desktop)
**Cursor** (`.cursor/mcp.json`) or **Claude Desktop** (`claude_desktop_config.json`):
```json
{
"mcpServers": {
"spraay": {
"command": "npx",
"args": ["-y", "spraay-x402-mcp"]
}
}
}
```
That's it. The first run prints something like:
```
💧 Spraay created a new wallet: 0xABC…123
Private key saved to ~/.spraay/.session (keep it safe — it controls funds).
Fund this address with USDC on Base to start paying for tool calls.
```
#### Optional — bring your own wallet
To sign with a key you already control instead of the auto-created one, set
`EVM_PRIVATE_KEY` in your environment (it overrides the session wallet).
**Never paste a raw key into a committed config file** — use a dedicated hot
wallet funded only with what the agent may spend. See
[Security & Wallet Safety](#security--wallet-safety).
### Remote URL (no wallet on your machine)
Settlement is handled gateway-side; your client never holds a signing key.
```json
{
"mcpServers": {
"spraay": {
"url": "https://spraay-x402-mcp--plagtech.run.tools"
}
}
}
```
### Smithery
```bash
smithery mcp add Plagtech/Spraay-x402-mcp
```
### From source
```bash
git clone https://github.com/plagtech/spraay-x402-mcp
cd spraay-x402-mcp
npm install
npm run build
npm start # auto-creates a wallet on first run
```
---
## Tool catalog
183 tools spanning the gateway's 33 categories. Highlights by area:
| Area | What it covers |
| --- | --- |
| **AI & Inference** | 200+ LLMs (OpenAI-compatible), wallet/tx classification, contract explanation, summaries |
| **Compute** | Text / image / video / TTS / STT / embeddings across Replicate, Chutes, OpenRouter; batch jobs |
| **Compute Futures** | Prepaid compute credits with tier discounts; draw down per inference |
| **Bittensor** | Decentralized inference, image gen, and embeddings via SN64 / SN19 |
| **Payments** | Batch payouts up to 200 recipients (Base, XRP Ledger, Stellar); estimates |
| **Payroll** | Stablecoin payroll runs across Base, Ethereum, Solana |
| **Invoicing & Escrow** | Crypto-native invoices and milestone escrow (persistent) |
| **DeFi & Data** | Swaps (Uniswap V3 / Aerodrome), oracle prices/gas/FX, bridge quotes, balances, ENS/Basename |
| **Analytics** | Wallet profiles and decoded transaction history |
| **Research** | 250M+ papers (OpenAlex), arXiv, Crossref, PubMed, PubChem, US Census, dictionary |
| **Search & RAG** | Web search, content extraction, question answering |
| **Communication** | Email, SMS, XMTP messaging, webhooks |
| **Infrastructure** | Multi-chain RPC, IPFS/Arweave storage, cron scheduling, structured logs |
| **Identity & Compliance** | KYC/sanctions screening, auth sessions, audit trail, crypto tax (FIFO, IRS 8949) |
| **Supply Chain (SCTP)** | Supplier registration, purchase orders, invoice verification, settlement |
| **Robotics (RTP)** | Register robots, dispatch paid tasks, escrow-backed completion |
| **Trust & Safety** | ProofLayer trust scores; free token-safety, address-safety, and tx-decode checks |
**24 free endpoints** require no payment — gas/prices/chain-status, address &
batch validation, ENS resolution, unit conversion, x402 discovery probes, and
model/compute discovery.
For the exact, current tool list and per-tool pricing, query the live manifest:
```bash
curl https://gateway.spraay.app/.well-known/x402.json
```
Pricing ranges from $0.001 (reads) to ~$0.10 (payroll, escrow release, tax),
settled in USDC on Base.
---
## How it works
1. An agent calls a tool (e.g. `spraay_batch_execute`).
2. The MCP server hits the [Spraay x402 Gateway](https://gateway.spraay.app).
3. The gateway responds `402 Payment Required` with a USDC amount.
4. **Remote mode:** settlement is handled gateway-side.
**Local mode:** `@x402/axios` signs a USDC micropayment from the auto-created
(or overridden) wallet.
5. The gateway validates payment and returns the data.
---
## Security & Wallet Safety
These tools can initiate **real USDC payments**. Treat the server like any tool
with funds access.
- **The auto-created wallet only holds what you send it.** Fund it with only as
much USDC as you're willing to let the agent spend. It starts empty, so a fresh
install cannot move funds until you fund it; read-only tools work regardless.
- **The session key lives at `~/.spraay/.session`.** Protect that file like any
secret — anyone who reads it controls the wallet. It's written with `0600`
permissions on POSIX systems. Back it up if the funds matter; delete it to
rotate to a new wallet on the next run.
- **Prefer the remote URL** if you'd rather keep no signing key on your machine —
settlement is handled gateway-side.
- If you bring your own key via `EVM_PRIVATE_KEY`, use a **dedicated hot wallet**
that controls no other assets, and **never** put a raw private key in a config
file, issue, or any committed file — keep it in your shell environment only.
The published npm package ships only `dist/`, `README`, and `LICENSE` (verify
with `npm pack --dry-run`) — no binaries, no build tooling, no install scripts.
Report security issues to **security@spraay.app**, not a public issue.
---
## Requirements
- **Node.js** 20+
- **MCP client** — Claude Desktop, Cursor, or any MCP-compatible client
- **USDC on Base** — fund the auto-created wallet (or your own); even $1 covers
thousands of calls
## Environment variables
None are required — the server runs with zero configuration. All of the
following are optional overrides.
| Variable | Required | Default | Description |
| --- | --- | --- | --- |
| `EVM_PRIVATE_KEY` | No | auto-created at `~/.spraay/.session` | Override the auto-created wallet with your own key. Use a dedicated, funded-as-needed hot wallet. |
| `SPRAAY_GATEWAY_URL` | No | `https://gateway.spraay.app` | Override the gateway URL. |
---
## Links
- **MCP server:** [mcp.spraay.app](https://mcp.spraay.app)
- **Gateway:** [gateway.spraay.app](https://gateway.spraay.app)
- **Manifest:** [gateway.spraay.app/.well-known/x402.json](https://gateway.spraay.app/.well-known/x402.json)
- **Smithery:** [smithery.ai/servers/Plagtech/Spraay-x402-mcp](https://smithery.ai/servers/Plagtech/Spraay-x402-mcp)
- **x402:** [x402.org](https://x402.org)
## License
MIT