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Agent Starter Kit: 10 APIs Your Auto-Mode Claude Can Call Today

#ai #webdev #programming #cli

Your Agent Has Permission. What Does It Actually Buy?

Claude Code auto mode goes default on August 14. Millions of agents will have permission to act autonomously. They will have a spending budget (.agent-budget). They will have payment rails (x402 + USDC).

But most agents still can not answer: what do I actually buy?

Here are 10 working x402 APIs, with copy-paste curl commands. No wallet needed for the first 15 calls per endpoint.

30-Second Setup 

echo '{"daily_limit_usdc":5,"max_per_call_usdc":1}' > ~/.agent-budget
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Your agent can now spend up to $5/day, max $1 per call.

The Starter Pack

1. Gas Price — $0.01

Current gas prices across Ethereum, Base, Arbitrum, Optimism.

curl -s https://minia2a.uk/x402/gas
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2. Polymarket Odds — $0.01

Real-time prediction market odds.

curl -s https://minia2a.uk/x402/polymarket
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3. Web Scrape — $0.02

Scrape any webpage to clean text.

curl -s -X POST https://minia2a.uk/x402/web-scrape \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com"}'
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4. Token Security Audit — $0.03

Check any ERC-20 token for honeypot risks and contract vulnerabilities.

curl -s https://minia2a.uk/x402/token-security \
  -H "Content-Type: application/json" \
  -d '{"token":"0x...","chain":"base"}'
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5. Captcha Solve — $0.02

Solve reCAPTCHA/hCaptcha challenges.

curl -s -X POST https://minia2a.uk/x402/captcha-solve \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com","sitekey":"SITEKEY"}'
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6. ENS Resolve — Free Trial

Resolve .eth names to addresses.

curl -s https://minia2a.uk/x402/ens-resolve \
  -H "Content-Type: application/json" \
  -d '{"name":"vitalik.eth"}'
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7. Screenshot — $0.02

Capture full-page screenshot of any URL.

curl -s -X POST https://minia2a.uk/x402/screenshot \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com"}'
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8. Wallet Intelligence — $0.02

Analyze any wallet: age, activity, protocols, risk score.

curl -s https://minia2a.uk/x402/wallet-intel \
  -H "Content-Type: application/json" \
  -d '{"address":"0x...","chain":"base"}'
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9. Crypto Price — $0.01

Real-time price for any cryptocurrency.

curl -s https://minia2a.uk/x402/crypto-price \
  -H "Content-Type: application/json" \
  -d '{"symbol":"ETH","currency":"USD"}'
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10. Sentiment Analysis — $0.01

Analyze text sentiment with confidence scores.

curl -s -X POST https://minia2a.uk/x402/sentiment \
  -H "Content-Type: application/json" \
  -d '{"text":"Bitcoin just broke ATH"}'
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How Auto-Mode Payment Works

Step What Happens Agent Sees
1 Agent calls endpoint (no wallet, no key) 200 OK + trial data
2 After 15 free trials, endpoint returns 402 402 Payment Required + machine-readable headers
3 Agent reads headers: amount, chain, token, recipient x-402-amount: 1, x-402-chain: base, x-402-token: USDC
4 Agent checks .agent-budget: is $0.01 ≤ $1 max? Within budget → auto-approve
5 Agent registers (10s, no KYC): gets wallet + 500 credits POST /api/v1/register-simple
6 Agent spends credits on API calls Credits deducted per call

The 4-Header Check

Before your agent spends its first cent, verify the endpoint is auto-mode ready:

curl -sI https://minia2a.uk/x402/gas | grep x-402-
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You should see:

  • x-402-amount — how much this costs (in cents)
  • x-402-chain — which blockchain (base, arbitrum, solana)
  • x-402-token — which token (USDC)
  • x-402-recipient — where to send payment

No headers = no auto-mode payment. The agent literally cannot pay without them.

Security

  • Budget enforcement: Agent will not exceed .agent-budget limits
  • No API keys: No secrets to leak, no key rotation
  • Machine-readable 402: Agent knows exactly what it is paying before it pays
  • Immutable receipts: Every payment on Base L2, verifiable on-chain

minia2a is an agent-to-agent API marketplace with trial-first access, live health probes, and machine-readable 402 headers. 800+ services. minia2a.uk

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