X402 Universal Payer
- 89 repo stars
- Updated July 28, 2026
- nirholas/three.ws
An auto-paying bridge that lets an AI agent pay any x402 endpoint across EVM and Solana chains, with Bazaar discovery, spend caps, and payee/host allowlists.
About
x402 Universal Payer is an auto-paying MCP bridge that lets an AI agent pay any x402 endpoint on the open web, spanning EVM chains like Base and Arbitrum plus Solana, and auto-discovering paid resources through the x402 Bazaar. A solo builder reaches for it when they want an agent to transact across many paid services, with per-call and total spend caps, payee and host allowlists, and batch-settlement channels keeping spending bounded and auditable.
- Pays any x402 endpoint across EVM and Solana
- Bazaar discovery registers paid resources as tools
- Per-call and cumulative spend caps
- Payee and host allowlists
- Persisted batch-settlement channels
X402 Universal Payer by the numbers
- Data as of Jul 28, 2026 (Skillselion catalog sync)
claude mcp add --env MCP_BRIDGE_EVM_PRIVATE_KEY=YOUR_MCP_BRIDGE_EVM_PRIVATE_KEY --env MCP_BRIDGE_SVM_PRIVATE_KEY=YOUR_MCP_BRIDGE_SVM_PRIVATE_KEY --env MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC=YOUR_MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC --env MCP_BRIDGE_MAX_TOTAL_ATOMIC=YOUR_MCP_BRIDGE_MAX_TOTAL_ATOMIC --env MCP_BRIDGE_ALLOWED_PAYTO=YOUR_MCP_BRIDGE_ALLOWED_PAYTO --env MCP_BRIDGE_ALLOWED_HOSTS=YOUR_MCP_BRIDGE_ALLOWED_HOSTS --env MCP_BRIDGE_ALLOW_HTTP=YOUR_MCP_BRIDGE_ALLOW_HTTP --env MCP_BRIDGE_DISCOVER_LIMIT=YOUR_MCP_BRIDGE_DISCOVER_LIMIT --env MCP_BRIDGE_BAZAAR_URL=YOUR_MCP_BRIDGE_BAZAAR_URL --env MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER=YOUR_MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER --env MCP_BRIDGE_MAX_DEPOSIT_ATOMIC=YOUR_MCP_BRIDGE_MAX_DEPOSIT_ATOMIC --env X402_MCP_BRIDGE_CHANNELS_DIR=YOUR_X402_MCP_BRIDGE_CHANNELS_DIR --env RPC_URL_8453=YOUR_RPC_URL_8453 x402-bridge -- npx -y @three-ws/mcp-bridgeAdd your badge
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| repo stars | ★ 89 |
|---|---|
| Package | @three-ws/mcp-bridge |
| Transport | STDIO |
| Auth | Required |
| Last updated | July 28, 2026 |
| Repository | nirholas/three.ws ↗ |
What it does
An auto-paying bridge that lets an AI agent pay any x402 endpoint across EVM and Solana chains, with Bazaar discovery, spend caps, and payee/host allowlists.
Who is it for?
agents transacting across many paid x402 services
Skip if: fiat payments or non-x402 endpoints
What you get
- agent ability to pay any x402 endpoint
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