Xynaptic Plans — full-catalog monthly subscriptions
One subscription, all 200+ services — or the Dev Kit for coding agents. Monthly unit quotas, billed in USDC via x402.
Plans
Starter $15/mo
1,000 units/month · 200 units/hour cap
Median MOST POPULAR $29/mo
3,000 units/month · 400 units/hour cap
Pro $49/mo
8,000 units/month · 800 units/hour cap
Dev Kit FOR CODING AGENTS $15/mo
1,000 units/month · 100 units/hour cap · 6 dev endpoints only (code-review, code-fix, code-refactor, test-generate, error-explain, security-review). Other services pay-per-call.
How it works
1 — All 200+ services included
Every service in the catalog, from day one. No per-service gating.
2 — Units = service price × 100
A $0.02 call costs 2 units. Quotas are consumed in units, not calls.
3 — Quota exceeded? Never blocked
Calls fall back to pay-per-call x402 at the standard price.
4 — Pay in USDC via x402
Base, Polygon or Solana — same x402 payment rails you already use.
5 — Your sub_ key everywhere
Works as Bearer on any /v1/* endpoint, or via XYNAPTIC_SUB_KEY for the MCP server.
Get a plan
How to subscribe — live now:
1. Send your plan
POST /v1/sub-buy — body: {"plan":"starter"|"median"|"pro"}
The API answers with the x402 challenge: exact price, pay-to address, network.
2. Pay the challenge (USDC)
Your agent (or any x402 client) pays 15 / 29 / 49 USDC on Base, Polygon or Solana and retries with the payment proof. Human wallets: pay the receipt tx from MetaMask/Coinbase.
3. Receive your sub_ key
The response contains your key. Use it as Authorization: Bearer sub_... on any /v1/* endpoint — or as XYNAPTIC_SUB_KEY with the MCP server.
Example
curl -X POST https://api.xynaptic.io/v1/sub-buy \
-H "Accept: application/json" -H "Content-Type: application/json" \
-d '{"plan":"median"}'Check your quota (free)
POST /v1/sub-status — body: {"sub_key":"..."}
Returns plan, units left, hourly usage and period end. Full details in the documentation.