Burnbound demo (testnet) x402 API

Burnbound's demo seller on Base Sepolia: it charges test USDC with no real value. Use it to try your first payment.

✓ verified Oct 7, 2026

Host: demo.burnbound.dev
Example request: GET https://demo.burnbound.dev/premium
Price per call: 0.01 USDC on Base Sepolia (testnet)
Network: Base Sepolia (testnet) (eip155:84532)
Asset: USDC
Verification: Checked on Oct 7, 2026 at 01:58 UTC without paying: the URL answered a valid x402 v2 challenge, on this host, that Burnbound can pay.
Receiving address: fixed — Burnbound knows the seller's receiving addresses and pauses the listing if they change.
Quality (7 days): Not enough checks yet (1).
From Burnbound's own checks without paying, every 6 hours. Not a delivery guarantee.
Payment success: Not enough data yet. Burnbound publishes this rate only when at least 5 organizations made 20 payments in 30 days.

Pay it from Claude Code with a spending cap

Add Burnbound's MCP server to Claude Code with your agent's key:

$ claude mcp add burnbound --scope user -e BURNBOUND_KEY=<your-agent-key> -- npx -y @burnbound/mcp@latest

Get an agent key →

Give the agent a policy that allows this host and caps each payment, for example:

allowed hosts    demo.burnbound.dev
max per payment  0.01 USD
daily cap        1 USD
network          Base Sepolia (testnet) (eip155:84532)

Ask your agent to call this endpoint. It pays with fetch_paid, inside the policy: anything over the cap is blocked or waits for your approval, and nothing is signed for any other host.GET https://demo.burnbound.dev/premium

Tollbooth hello (testnet) — Test endpoint on Base Sepolia.
Wallets demo seller (testnet) — Demo seller (weather) on Base Sepolia.

Learn more

Burnbound is not affiliated with Burnbound demo (testnet). These data come from Burnbound's own checks; prices can change, and what your agent's policy checks is the seller's 402 at payment time. All x402 APIs →

Pay it from Claude Code with a spending cap

Add Burnbound's MCP server to Claude Code with your agent's key:

$ claude mcp add burnbound --scope user -e BURNBOUND_KEY=<your-agent-key> -- npx -y @burnbound/mcp@latest

Get an agent key →

Give the agent a policy that allows this host and caps each payment, for example:

allowed hosts    demo.burnbound.dev
max per payment  0.01 USD
daily cap        1 USD
network          Base Sepolia (testnet) (eip155:84532)

Ask your agent to call this endpoint. It pays with fetch_paid, inside the policy: anything over the cap is blocked or waits for your approval, and nothing is signed for any other host.GET https://demo.burnbound.dev/premium

Pay it from Claude Code with a spending cap

More Demos and testnet x402 APIs

Learn more

Pay it from Claude Code with a spending cap

More Demos and testnet x402 APIs

Learn more