@true402.dev/mcp-server
MCP server for the true402 machine-native marketplace — give your agent pay-per-call access to AI inference and web tools over x402 (HTTP 402 micropayments in USDC on Base).
No accounts, no API keys. The agent's wallet is its identity: each paid tool returns an HTTP 402 challenge, the server signs an EIP-3009 USDC authorization, and the call settles on-chain. Configure a funded wallet to auto-pay, or run without one and the paid tools will surface the exact payment requirements instead of failing.
Tools
| Tool | Price | What it does |
|---|---|---|
chat | per-token + 3% | OpenAI-compatible LLM inference across many models |
list_models | free | List available models + pricing |
token_safety | $0.005 | ERC-20 rug/honeypot pre-check on Base → 0–100 score, risk band, flags, liquidity depth + a buy/sell honeypot simulation |
seo_audit | $0.015 | SEO + GEO (generative-engine-optimization) audit of a page → structured report |
web_extract | $0.005 | Fetch a URL → clean text + markdown + links + metadata |
link_preview | $0.003 | Fetch a URL → Open Graph / unfurl card |
robots_check | $0.003 | A site's AI-crawler policy (GPTBot, ClaudeBot, Google-Extended, PerplexityBot, …) + sitemaps + llms.txt |
headers_check | $0.003 | HTTP security-headers analysis (HSTS, CSP, …) + a 0–100 score |
new_pairs | $0.003 | Newly created Base DEX pairs (Uniswap V3 / Aerodrome) — fresh token launches |
liquidity_pulls | $0.003 | Liquidity-removal / rug alerts on Base pools |
whale_swaps | $0.005 | Large swaps on Base by USD size — whale flow |
token_report | $0.01 | Fuller on-chain token report |
Tools are auto-discovered from the live catalog, so new marketplace stalls appear automatically. Prices are illustrative; the live 402 challenge is authoritative.
Example: add token-safety to your agent
A copy-paste reference in examples/token-safety/ — a framework-agnostic
x402 client plus a drop-in LangChain tool that rug/honeypot-checks any Base token for $0.005/call.
Install
Requires Node.js ≥ 20. Runs over stdio — point any MCP client at it via npx.
Claude Desktop / Claude Code
Add to your MCP config (claude_desktop_config.json, or .mcp.json for Claude Code):
{
"mcpServers": {
"true402": {
"command": "npx",
"args": ["-y", "@true402.dev/mcp-server"],
"env": {
"WALLET_PRIVATE_KEY": "0xYOUR_FUNDED_BASE_WALLET_KEY"
}
}
}
}
Cursor / Cline / other MCP clients
Same idea — command npx, args ["-y", "@true402.dev/mcp-server"], and the WALLET_PRIVATE_KEY env var.
Configuration
| Env var | Default | Description |
|---|---|---|
SERVER_URL | https://true402.dev/api | true402 API base. Override to point at a self-hosted instance. |
WALLET_PRIVATE_KEY | (none) | A funded Base wallet private key used to sign x402 payments. Needs USDC (gas is sponsored by the facilitator — no ETH required). Without it, paid tools return the 402 requirements instead of paying. |
Security: the key is read only from the environment and is never logged, echoed, or returned. Use a dedicated low-balance wallet — fund it with only what you intend to spend.
How payment works
- The tool calls the true402 endpoint with no payment.
- The server replies
402with accepted payment options (USDC on Base). - This MCP server signs an EIP-3009
transferWithAuthorizationwith your wallet. - It retries with the signed
X-PAYMENTheader; the service verifies and responds. - Settlement happens on-chain. Your wallet pays only USDC — the facilitator sponsors gas.
Links
- Marketplace: https://true402.dev
- Live tool catalog: https://true402.dev/api/v1/services
- x402 protocol: https://x402.org
License
MIT