The Universal Micropayment Standard. Equip Autonomous Agents with Live Tools for Fractions of a Cent.
The open M2M payment protocol for Claude Desktop, Cursor, and enterprise LLM loops. Settle live paid MCP tools in sub-cent fractions with zero credit card friction, zero subscriptions, and client-side BudgetGuard safety.
The Subcent402 Official Starter Pack
Equip your agent with 4 essential tools in a single command: TokenMarkdown, TokenEnrich, SEC Edgar Parser, and TokenVerify. Includes $1.00 free sandbox credits.
npx -y @subcent402/starter-pack-mcp
Test Any Tool Live with Subcent402
Select any MCP tool, provide test arguments, and watch autonomous sub-80ms micro-settlement execute live.
// Click "Run Live 402 Toll ⚡" above to trigger an autonomous micro-payment and fetch live data.
Pre-Funded Agent Credit Vaults
Equip your agent fleets with instant working capital. Zero transaction delays, auto-refills, and bonus execution credits.
Ideal for individual developers running Claude Desktop or Cursor.
- $50.00 In-Vault Balance
- ~50,000 Tool Invocations
- Auto-Refill Threshold Alerts
For AI agent agencies and production developer teams.
- $260.00 Total Credits (+$10 Bonus)
- ~260,000 Tool Invocations
- Multi-Agent BudgetGuard Policies
- 1-Click Slack Approval Webhooks
For multi-agent corporate deployments and enterprise compliance.
- $1,050.00 Total Credits (+$50 Bonus)
- Priority Global 300+ Edge Routing
- SOC2 Cryptographic Non-Repudiation Logs
Discover & Invoke Paid Tools Autonomously
A global directory of production-ready MCP tools published by community creators and verified ecosystem partners.
SEC 10-K & 8-K Parser
Instant vector-ready JSON extraction of SEC EDGAR 10-K, 10-Q, and 8-K filings by QuantData Labs.
TokenMarkdown Engine
Sub-150ms Web-to-Markdown engine stripping 95% of HTML/SVG DOM noise to slash LLM token bills.
Ephemeral Python GPU Sandbox
Sub-second disposable cloud sandbox to run untrusted Python code, PyTorch models, and data science safely.
TokenEnrich Signals
180-token B2B firmographics & live DNS/TLS wire resolvers. Eliminates 70% of Apollo/Clay waterfall waste.
GitHub PR & CVE Security Scanner
Automated vulnerability scanner checking incoming PRs against 240,000+ known CVEs by SecOps Dev.
Publish Your MCP Tool
Monetize your code in 60s. Collect micropayments directly to your wallet from 50,000+ AI agents worldwide.
Stripe Base Surcharges vs. Subcent402 Savings
Why Stripe's $0.30 fixed surcharge breaks micro-agent economics—and how Subcent402 eliminates billing waste.
Turn Any API or Code Function into Instant Revenue
Zero customer accounts to manage. Zero credit card checkout forms. Keep 98.5% of every transaction paid directly to your wallet.
3-Line Integration
Wrap any TypeScript or Python function with @withSubcent402. Zero database or server setup required.
Instant Non-Custodial Payouts
Funds route directly P2P into your Base USDC or Lightning wallet. Zero minimum payout thresholds.
Global Agent Discovery
Published tools are indexed in /llms.txt and auto-discoverable by Claude Desktop, Cursor, and LangChain agents.
Claude Desktop & Cursor Config Generator
Select your active tools, configure your daily spending limit, and copy the ready-to-run configuration block.
1. Select Active Tools:
2. BudgetGuard Daily Limit (USD):
3 Lines of Code. TypeScript & Python.
Drop into any Model Context Protocol tool, FastAPI endpoint, or REST API with sub-0.2ms offline HMAC verification.
// 1. Wrap any MCP tool in 3 lines of code
import { withSubcent402 } from "@subcent402/sdk";
export const extractTool = withSubcent402({
priceUsd: 0.001,
toolName: "tokenmarkdown_extract",
recipientWallet: "0xYourWalletOrLightning",
rootSecret: process.env.SUBCENT402_ROOT_SECRET!
}, async (params) => {
return await extractCleanMarkdown(params.url);
});Zero Subscriptions for Agents. Managed Edge for Teams.
Agents pay per tool call on the wire. Hosted Gateway SaaS available for enterprise fleet governance.
Self-hosted open source SDKs.
- Full `@subcent402/sdk` & Python SDK
- Stateless Offline HMAC Verifier (<0.2ms)
- Local BudgetGuard & Session Passes
Global edge routing on Cloudflare Workers.
- Global 300+ Region Edge Settlement
- 1.0% Reduced Protocol Routing Fee
- Real-Time Spending Analytics & Webhooks
- 1-Click Slack / Browser HITL Webhooks
Multi-agent fleet management & compliance.
- Dedicated Single-Tenant Edge Gateway
- SOC2 & Audit Non-Repudiation Logs
- Team-Wide Multi-Agent Budget Policies
- Dedicated 24/7 SLA & Engineering Support
Frequently Asked Questions
Everything you need to know about sub-cent agent tolls, stateless Macaroon cryptography, and non-custodial payouts.
Why can't we use traditional Stripe, Visa, or PayPal for AI agents?
Stripe charges a fixed $0.30 base fee + 2.9% on every transaction. If an autonomous agent invokes an MCP tool that costs $0.002, Stripe's fixed fee is 150x the cost of the actual tool! Subcent402 enables true sub-cent tolls ($0.001 – $0.01) with a flat 1.5% protocol routing fee and 0% base surcharge.
Do agents or users need to create accounts or generate static API keys?
No. Subcent402 implements programmatic L402 / HTTP 402 macaroons. Tools return MCP_ERROR(-32042) with a cryptographic challenge; the agent client auto-settles the challenge in <80ms and attaches the preimage proof in _auth_l402. Zero human signup forms or OAuth browser redirects.
How do we prevent runaway AI loops from draining corporate budgets?
@subcent402/client includes BudgetGuard, enforcing hard daily spend caps (e.g. $5.00/day), per-call limits ($0.05/call), and 1-click human-in-the-loop (HITL) approvals via Slack/Discord webhooks whenever an action exceeds safety thresholds.
Which payment rails and currencies are supported?
Subcent402 natively supports Base USDC (L2 smart contract with EIP-712 Permit) and Bitcoin Lightning Network (BOLT11 / LNURL). For developers who want zero crypto exposure, we provide Pre-Funded Virtual Credit Vaults.
Does validating a payment add latency to tool calls?
No. Tool servers verify Macaroon HMAC-SHA256 signatures statelessly and offline in <0.2ms. Zero database queries or network roundtrips required on the verifier side.
How do tool creators publish and receive payouts?
Wrap your TypeScript or Python function with @withSubcent402, specify your price ($0.001 – $0.05) and payout wallet. Payouts route non-custodially directly to your wallet with zero minimum withdrawal thresholds.
Start monetizing and invoking MCP tools in under 60 seconds.
$1.00 free sandbox credits included. Zero credit card required. Drop into Claude Desktop, Cursor, Python, or FastAPI immediately.