Companion planting USDA zones Soil health Wildcrafting Pay-per-call USDC

Permaculture & homestead APIs
cheap enough to cron-job.

Six expert-grade x402 endpoints for permaculture design, zone-aware growing plans, soil health, wildcrafting field guides, food preservation, and herbal properties. LLM-backed with vertical-specialized system prompts. $0.01–$0.05 per call. No signup, settled on Base mainnet.

See the 6 endpoints → How to integrate →
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Six endpoints. From companion planting to wildcrafting.

Each returns structured guidance grounded in permaculture principles, USDA zone data, and field-tested practices. One curl call, one micropayment, one answer.

POST /api/companion-planting $0.01
Companion Planting Recommendations
Plant guild designs, polyculture combos, nitrogen fixers, pest deterrents, succession schedules. Returns spacing and timing.
query: "tomato in zone 8a, sandy loam"
POST /api/growing-zone $0.01
USDA Growing Zone Analysis
Hardiness zone, first/last frost dates, growing season length, heat zone data, suitable plant lists. Microclimate considerations included.
query: "Austin TX 78701"
POST /api/herbal-properties $0.01
Herbal Properties Reference
Traditional uses, active constituents, preparation methods, contraindications. Sources cited where known.
query: "yaupon holly medicinal use"
POST /api/wildcrafting-guide $0.01
Wildcrafting Field Guide
Identification, sustainable harvest practices, ethical guidelines, regional availability. Ethnobotany-aware.
query: "wild ginger East Texas"
POST /api/preservation-guide $0.01
Food Preservation Guide
Canning, dehydrating, fermenting, freezing. Shelf-life estimates, USDA-aligned safety, pH and acid considerations.
query: "preserve fresh tomatoes 6 months"
POST /api/soil-health $0.05
Soil Health Analysis
Cover crops, amendments, biological inoculants, drainage strategy. Regenerative-aligned with NRCS principles.
query: "compacted clay, low OM, veg garden"

One curl. Pay a penny in USDC. Get a real plan.

Standard x402: HTTP 402 challenge → sign EIP-3009 USDC transfer → resubmit. CDP facilitator handles settlement. ~2–5 sec total.

# 1. Initial request — server returns 402 with payment instructions
curl -X POST https://x402.adametherzlab.com/api/companion-planting \
  -H "Content-Type: application/json" \
  -d '{"query": "tomato in zone 8a sandy loam"}'

# 2. Sign EIP-3009 with @x402/client, resubmit with payment-signature header:
curl -X POST https://x402.adametherzlab.com/api/companion-planting \
  -H "Content-Type: application/json" \
  -H "payment-signature: <base64 EIP-3009 signed payload>" \
  -d '{"query": "tomato in zone 8a sandy loam"}'

# Returns:
{
  "endpoint": "/api/companion-planting",
  "name": "Companion Planting Recommendations",
  "vertical": "Permaculture",
  "query": "...",
  "result": "<structured guild design with companion plants, spacing, timing, benefits>",
  "pricing": { "amount": "0.01", "currency": "USDC", "network": "base" },
  "meta": { "model": "meta-llama/llama-3.3-70b-instruct" }
}

Use any x402 client: MCP server, @x402/client npm, or Coinbase CDP SDK.

Pay-per-call. Pennies, not subscriptions.

Most endpoints are $0.01. Soil-health is $0.05 (deeper analysis). No monthlies, no minimums.

companion-planting — $0.01 growing-zone — $0.01 herbal-properties — $0.01 wildcrafting-guide — $0.01 preservation-guide — $0.01 soil-health — $0.05

100 companion planting queries = $1. 1,000 wildcrafting lookups = $10. Cheap enough to run in a homesteading-bot cron.

FAQ

Is this useful for a small farm or garden?

Yes — that's the target. A bot that emails you weekly companion-planting tweaks for your beds, or a script that crosses your shopping list against your zone's frost date. The cost per call is low enough that running it in cron makes economic sense.

Can I rely on the wildcrafting guidance?

Use it as a starting point, not as a final ID. Always cross-reference with a regional field guide and confirm visually with an expert before consuming any wild plant. The endpoint surfaces best-practice ethnobotanical patterns; it isn't a substitute for in-person plant identification.

How current is the zone data?

The model knows USDA's 2023 plant hardiness zone update and standard heat-zone references. For micro-climate verification, combine with local agricultural extension office data.

Why pay-per-call for a permaculture API?

Because monthly subscriptions don't fit hobbyists or small operators. A homesteader who needs 30 lookups a year shouldn't pay $20/month. With per-call pricing, you pay exactly for what you use — $0.30 for the year if that's what you need.

How do I pay without a Coinbase account?

Any wallet with USDC on Base works. The protocol uses EIP-3009 transferWithAuthorization — sign off-chain, facilitator settles. No KYC, no signup.