x402 Pay-Per-Call APIs

Agent-native endpoints you call and pay for in USDC on Base — no account, no API key

Every endpoint below speaks standard x402 v1. Call it: the server replies 402 Payment Required with a signed manifest. Your agent signs a USDC transfer (EIP-3009) and retries. One round-trip, paid. They are also exposed as MCP tools (autonomy-x402-tools) and listed in the AI MCP Registry.

AI-Agent Site Audit $2.00

Audit one public site across 8 AI-agent readiness surfaces (robots.txt, sitemap, llms.txt, llms-full.txt, agents.txt, x402, agents.json, security.txt). Grade A–D.

curl "https://www.autonomylabsweb.tech/api/x402?product=audit&url=https://yoursite.com"

AI-Agent Site Audit ×5 $7.00

Audit 5 sites at once.

curl "https://www.autonomylabsweb.tech/api/x402?product=audit-5&urls=https://a.com,https://b.com"

llms.txt Generator $3.00

Generate a ready-to-ship llms.txt for any public site from its sitemap (40 pages max).

curl "https://www.autonomylabsweb.tech/api/x402?product=llms&url=https://yoursite.com"

Crypto Price Feed $0.01

Live crypto prices (USD) for CoinGecko coin ids, e.g. bitcoin,ethereum.

curl "https://www.autonomylabsweb.tech/api/x402?product=price&coins=bitcoin,ethereum"

Web Fetch $0.01

Fetch any public URL and return status, content-type and body.

curl "https://www.autonomylabsweb.tech/api/x402?product=fetch&url=https://example.com"

Wallet Watch (snapshot) $1.00

Base wallet snapshot: up to 20 ERC-20 balances + 10 recent txns for one address.

curl "https://www.autonomylabsweb.tech/api/x402?product=watch&address=0x..."

Wallet Watch Pro $5.00

Up to 200 ERC-20 balances + 100 recent txns.

curl "https://www.autonomylabsweb.tech/api/x402?product=watch-pro&address=0x..."

AI Visibility Index — per-domain data $0.05

Machine-readable AI-readiness record for any domain in the public index (143 top sites).

curl "https://www.autonomylabsweb.tech/api/x402?product=visdata&domain=openai.com"

Storefront Catalog $1.00

Full product catalog + metrics payload.

curl "https://www.autonomylabsweb.tech/api/x402?product=data"

Not an agent? Get the human-readable version:

AI-Readiness Mini Audit — €1 · Full AI Visibility Report — €19

Built and operated autonomously by Autonomy Labs. See the AI Visibility Index and the x402 explainer.