On August 14, Claude Code auto mode becomes the default. Your agent will be able to discover APIs, read payment instructions, and spend money — without asking you. Here is how to set it up in 5 minutes, with zero API keys and zero KYC.
What you'll have after 5 minutes: Claude Code agent with access to 306 pay-per-call APIs (gas prices, CAPTCHA solving, web scraping, crypto data, AI inference, and more), 5 free trial calls, and the ability to auto-pay for API calls via USDC on Base.
$ npm install -g minia2a-mcp@latest added 1 package in 2s
This installs 8 tools into Claude Code: list_services, get_service, get_stats, register, credits, buy_credits, call_service, and check_endpoint. Version 1.1.3 includes the auto-mode readiness validator.
$ claude mcp add minia2a -- npx -y minia2a-mcp MCP server "minia2a" added to Claude Code
$ # sign "minia2a trial:<wallet>:x402-gas:<unix_ts>" (EIP-191) -> $SIG WALLET=0xYOUR_WALLET; TS=$(date +%s) curl -s "https://minia2a.uk/x402/gas?wallet=$WALLET" \ -H "X-Wallet-Signature: $SIG" -H "X-Trial-Timestamp: $TS" {"ok":true,"result":{"chain":"base","gasPriceWei":"6000000","gasPriceGwei":0.006}}
That's it. You now have a wallet address, 5 trial calls, and the ability to call any of 306 pay-per-call APIs. No API key. No KYC. No gas fees for registration.
Save your wallet address — you'll use it as a query parameter when calling services.
Ask Claude Code to list available services:
You: list the top 10 most popular APIs on minia2a Claude Code runs list_services → returns 306 endpoints. Top 10 by trial usage: 1. x402-recall 1,972 trials Search memory for agents 2. x402-gas 1,582 trials Multi-chain gas prices 3. x402-find 1,283 trials Service discovery 4. x402-captcha 1,203 trials CAPTCHA solving 5. x402-time 892 trials Time/date utilities 6. x402-polymarket 829 trials Prediction market data 7. x402-screenshot 381 trials Web page screenshots 8. x402-uuid 338 trials UUID generation 9. x402-web-scrape 309 trials Web scraping 10. x402-store 299 trials Key-value storage
Or browse the full catalog at discover-new.html.
A trial is two halves: the wallet in the query string and a signature over
minia2a trial:<wallet>:<serviceId>:<unix_ts> (EIP-191). Both together spend one of your 5 free calls.
The wallet param alone returns 400 missing X-Wallet-Signature header.
$ # sign "minia2a trial:$WALLET:x402-gas:$TS" with your wallet key -> $SIG curl -s "https://minia2a.uk/x402/gas?wallet=$WALLET" \ -H "X-Wallet-Signature: $SIG" -H "X-Trial-Timestamp: $TS" {"ok":true,"result":{"chain":"base","gasPriceWei":"6000000","gasPriceGwei":0.006}}
Out of trials? Drop the wallet param and pay the 402 challenge from your agent's own wallet. There is no balance, no credits to top up, and no account to fund:
$ curl -s -o /dev/null -w '%{http_code}\n' https://minia2a.uk/x402/gas 402
Or ask Claude Code to do it:
You: check current gas prices on Base, Optimism, and Arbitrum Claude Code runs call_service(x402-gas) → returns live gas prices. 1 credit spent. 499 remaining.
Create a .agent-budget file in your project root so Claude Code knows your spending limits before auto mode goes live:
$ cat > .agent-budget << 'EOF' { "daily_limit_usdc": 5, "max_per_call_usdc": 1 } EOF
When auto mode activates on Aug 14, Claude Code will read this file and autonomously approve any API call under $1.00 as long as the daily total stays under $5.00. Calls exceeding the limit will pause and ask for your approval.
How it works: Agent hits a 402 Payment Required → reads x-402-amount: 500 header (500 cents = $0.05) → checks .agent-budget → $0.05 under $1.00 limit → authorizes payment → transaction settles on Base in seconds → agent gets the data.
When your 5 free trial calls run out, pay per call with USDC on Base via x402:
$ # Any endpoint returns HTTP 402 with an accepts[] price. Sign + pay USDC, retry. # Or use @x402/fetch / the minia2a SDK to do this automatically.
Each call settles in USDC (most endpoints $0.01–$0.05). No credit balance — pay per call.
When auto mode goes live, your Claude Code agent will be able to:
All of this happens through HTTP headers and JSON. No browser. No human in the loop. No API keys to manage. The agent reads the 402 response, checks the budget, pays, and gets the data — all at machine speed.
| Category | Example Endpoints | Typical Cost |
|---|---|---|
| Blockchain Data | Gas prices, token security, ENS resolution, ABI lookup, transaction decode, wallet intelligence | 1–5 credits |
| Web Automation | Screenshots, web scraping, CAPTCHA solving, form filling, HTTP analysis | 1–10 credits |
| Market Data | Polymarket odds, crypto prices, DEX prices, funding rates, fear & greed index | 1–3 credits |
| AI Tools | Code review, commit messages, blog outlines, SQL generation, translation, summarization | 1–5 credits |
| Developer Utilities | UUID generation, JSON validation, JWT decoding, regex explanation, base64, hash functions | 1 credit |
| Security | SSL checks, email verification, domain intelligence, IP lookup, DNS records | 1–3 credits |
$ curl -s https://minia2a.uk/api/agent-ready | python3 -m json.tool { "status": "ready", "protocols": ["x402", "mcp"], "payment": {"chain": "base", "token": "USDC"}, "registration": { "endpoint": "POST /api/v1/register-simple", "description": "Auto-creates wallet, 5 free trial calls" }, "trial": { "anonymous": "5 free trial calls per IP", "registered": "5 free trial calls on registration" }, "auto_mode": { "budget_file": ".agent-budget", "budget_format": "{daily_limit_usdc:5,max_per_call_usdc:1}" } }
If you get this JSON response, your agent can discover, register, trial, and pay — all without touching a browser.
3 days to auto mode. Set up agent payments now so your Claude Code agent is ready on Day 1. 5 commands, 5 minutes, zero friction. Check readiness →
Published by minia2a — the open agent API marketplace. 306 verified x402 endpoints, trial-first, auto-mode ready. Install: npm install -g minia2a-mcp · Trials (no registration): sign minia2a trial:<wallet>:<serviceId>:<unix_ts> with EIP-191 and send X-Wallet-Signature + X-Trial-Timestamp · Validate: auto-mode-validator.html