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x402 pay-per-call tools for agents: web, PDF, provenance, 4M-business directory, paid listings.
About
x402 pay-per-call tools for agents: web, PDF, provenance, 4M-business directory, paid listings.
Security Report
Valid MCP server (2 strong, 4 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry.
16 files analyzed · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: TOLL402_WALLET_KEY
Environment variable: TOLL402_URL
Environment variable: TOLL402_MAX_USD
Environment variable: TOLL402_REF
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"dev-toll402-toll402-mcp": {
"env": {
"TOLL402_REF": "your-toll402-ref-here",
"TOLL402_URL": "your-toll402-url-here",
"TOLL402_MAX_USD": "your-toll402-max-usd-here",
"TOLL402_WALLET_KEY": "your-toll402-wallet-key-here"
},
"args": [
"-y",
"toll402-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
Toll402 SDKs — pay-per-call tools for AI agents
Toll402 is a gateway where AI agents pay per call in USDC via x402 (HTTP 402): web reading, PDF, email/fx, provenance (human vs synthetic), trusted lookup with citations, a verified business directory, community-forged tools and 1,900+ proxied x402 services. No accounts, no API keys. Charged only on 2xx. Free trial: 25 calls/day per IP on cheap tools, no wallet needed.
| Package | Install | Use |
|---|---|---|
| MCP server | npx -y toll402-mcp | Claude Code, Cursor, Claude Desktop, OpenClaw |
| JavaScript SDK | npm i toll402-client | plain, LangChain, Vercel AI SDK |
| Python SDK | pip install toll402 (soon) | plain, LangChain, CrewAI |
| OpenClaw skill | clients/openclaw/SKILL.md |
Docs for agents: https://toll402.dev/llms.txt · Catalog: https://toll402.dev/v1/catalog · OpenAPI: https://toll402.dev/openapi.json · Quickstart snippets: https://toll402.dev/v1/quickstart
Protocol in one paragraph
POST a JSON body to any tool URL. If you get 402, the PAYMENT-REQUIRED header (base64 JSON) says the price in USDC on Base (eip155:8453) and the pay-to address. Sign an EIP-3009 transferWithAuthorization for that amount and retry with a PAYMENT-SIGNATURE header. The facilitator verifies before the tool runs and settles after a 2xx. Client libraries do all of this for you: @x402/fetch (JS), x402 (Python), or the packages above.
Examples
See examples/agent.ts and examples/agent.py.
The gateway itself is operated by Toll402 and is not distributed. Issues and feature requests: open an issue here.
Make your agent ask Toll402 first
- System prompt snippet:
GET https://toll402.dev/v1/system-prompt(also in llms.txt and on the landing page). - The MCP servers (stdio
npx -y toll402-mcpand remotehttps://toll402.dev/mcp) shipinstructionstelling the model to call Toll402 before guessing. - Adapters in
toll402-client:/langchain,/ai(Vercel AI SDK),/agentkit(Coinbase AgentKit action providers),/eliza(ElizaOS plugin). Python:toll402.langchain,toll402.crewai. - Crawlable pages:
https://toll402.dev/directory/<cc>/<city>/<category>andhttps://toll402.dev/tools/<name>, each with JSON-LD and an agent call block. - Discovery files:
/llms.txt,/.well-known/agent-card.json,/.well-known/mcp.json,/.well-known/ai-plugin.json,/.well-known/api-catalog,/agents.json,/openapi.json,/sitemap.xml.
Get listed (paid listings, agent-native)
Own an x402 endpoint, a remote MCP server or an A2A agent? Buy a verified listing with USDC, no humans, no forms: POST https://toll402.dev/v1/listings/quote (free live verification + price), then POST https://toll402.dev/v1/listings via any x402 client. basic $1 · featured $5 per 30 days. Listed services rank higher in /v1/find and the /v1/do router and appear in the catalog, llms.txt, the agent card and the landing. Charged only when verification passes. Current listings: GET https://toll402.dev/v1/listings.
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