Burnbound

Spending limits for AI agents that pay x402 APIs. Bring your own wallet.

View on burnbound.devTry this MCPSponsored

Documentation

  1. Quickstart: Claude Code and Cursor From creating an agent key in the dashboard to the agent's first fetch_paid call, in Claude Code or Cursor.
  2. Concepts Policies, per-payment and daily caps, allowed hosts, human approvals, signing modes and the x402 v2 payment flow.
  3. MCP tools reference Configuration, the fetch_paid, get_budget, list_payments, get_approval_status and search_paid_apis tools, error codes and the wallet CLI of @burnbound/mcp.
  4. SDK Status of the JavaScript SDK (payFetch and wrapFetchWithPayment): not published on npm yet; use the MCP server today.
  5. Security and trust model What Burnbound stores and sees in each signing mode, the cooperative limit of client-side signing, and out-of-policy detection.
  6. FAQ Short answers about wallets, networks, fees, plans, custody and supported agents.

Step-by-step walkthroughs are in the guides, and the exact setup for Claude Code, Cursor, Claude Desktop, the Vercel AI SDK, LangChain.js and Mastra is in the integrations.

For LLMs and agents: /llms.txt lists every page, and /llms-full.txt has all of them as one Markdown file.