x402 in 30 seconds, then a paying call in 10 minutes.
45 pay-per-call endpoints across 7 verticals. HTTP 402 returns a signed challenge, your agent signs an EIP-3009 USDC authorization, the facilitator settles on Base mainnet. Cheapest call is $0.002 USDC. No subscriptions, no API keys, no rate-limit emails.
Try a free endpoint with one curl command
Discovery is free. This returns the live manifest of every endpoint, price, and the facilitator URL — exactly what an autonomous agent uses to plan its first paid call.
# run this from any shell
curl -s https://x402.adametherzlab.com/.well-known/x402-services.json | jq '.total, .verticals'
Expected output: an integer (45 endpoints) followed by a JSON array of vertical names. Try it now — no wallet required.
The seven verticals
Each vertical has a deep page with every endpoint, the exact USDC price, and a working live demo curl block.
Make your first paid call
The cheapest paid endpoints are $0.002 (DataForge web scrape) and $0.01 (companion planting, growing zone, herbal properties). Two-step protocol: get the 402 challenge, sign with USDC.
# 1. Get the 402 challenge (this is FREE)
curl -i -X POST https://x402.adametherzlab.com/api/companion-planting \
-H 'Content-Type: application/json' \
-d '{"query":"tomatoes in a 4x8 raised bed, hot dry climate"}'
# Returns HTTP 402 with x-payment-required headers describing
# the USDC amount, recipient and chain (Base mainnet, $0.01 in this case).
# 2. Sign an EIP-3009 TransferWithAuthorization for that amount,
# base64-encode it, and resubmit as the X-Payment header.
# Most agent stacks have a one-line wrapper:
# agent.x402.fetch(url, body) // returns the JSON response
# Or use Coinbase CDP's reference client. See /start for a 10-minute walkthrough.
Walk through the full first-paid-call flow with wallet setup at /start.
Pricing for AI agents
Pay-per-call USDC on Base mainnet. No tiered subscriptions, no overage charges — your agent only pays for the calls it makes.
Sub-cent
DataForge scrape (raw HTTP). Cheapest endpoint in the network. Use it for high-volume crawl work.
Penny class
Permaculture, growing-zone, herbal lookups, transaction verification. The everyday-agent tier.
Single-digit cents
Most analytical endpoints — corrosion, pest ID, soil health, market data, lead scoring.
Premium
Full agent briefs, AI market analysis, business reports, facility risk, supply chain risk. Reserve for high-value reasoning steps.
Settlement happens on Base via Coinbase's CDP x402 facilitator. ~2-3s confirmation. Funds land in 0x24A93e03deD53ac77d06611c763d2e3B4C6aaF40.
What is x402?
x402 is the HTTP-native micropayments standard from Coinbase. A server returns HTTP 402 Payment Required with a description of the asset, amount, chain and recipient. The client signs an authorization, base64-encodes it as the X-Payment header, and resubmits. The facilitator verifies the signature and settles on-chain. No accounts, no API keys, no DRM-style auth dance — just one extra header.
This funnel is the on-ramp to the AdametherzLab x402 network: 45 live endpoints across agriculture, industrial compliance, environmental, research, trading, content, and devops verticals. Hosted on Base mainnet, settled in USDC, paid to a single revenue wallet.