# naxytra

> Pay-per-call tools for AI agents. Discovery is free; each paid call costs $0.01 USDC on Base mainnet ($0.001 USDC on Base Sepolia testnet), paid with x402 v2 (gasless EIP-3009 USDC authorization) and settled through the Coinbase CDP facilitator only after the call succeeds. No API keys, no accounts.

naxytra is the umbrella for two services: the xytara runtime (pay, route, execute, settle) and the xoonya proof engine (post-quantum proof verification). Each paid call returns a signed delivery receipt (Ed25519 + ML-DSA-65).

## Buy

- MCP server (Streamable HTTP): https://xytara-mcp-executor.onrender.com/mcp
  - 17 deterministic tools: summarize, zones.lookup, catalog, reply.draft, json.validate, text.extract, html.to-text, text.chunk, x402.decode, keccak256, address.validate, x402.verify-receipt, tx.status, abi.encode, abi.decode, merkle.verify, eip712.hash
  - Free: initialize, tools/list, resources, prompts, and the catalog tool
  - Paid: every other tools/call, $0.01 USDC per call (Base mainnet) · $0.001 (Base Sepolia)
  - An unpaid tools/call returns a payment-required tool result (x402 MCP transport); attach the signed payment and retry
  - HTTP-402 variant for fetch-wrapper x402 clients: https://xytara-mcp-executor.onrender.com/mcp/http402
- Runtime execute: POST https://xytara.onrender.com/x402/commands/execute (also https://xytara.onrender.com/x402/mcp/tools/invoke), same price
  - task_ref adapter.mcp.invoke: any of the 17 MCP tools
  - task_ref adapter.xoonya.invoke: post-quantum proof verification (proof.verify-signature, proof.verify-bundle)
  - other catalog task_refs are reference entries and return 501 capability_not_executable (no charge)
- A2A: message/send on https://xytara.onrender.com/v1/a2a with metadata.task_ref set to one of the two tasks above, same price
- Credits: POST https://xytara.onrender.com/x402/credits/topup, $1.00 USDC on Base mainnet buys 400 credits (1 credit = $0.0025; a task costs 1-8 credits, a typical MCP call 3). The response returns a spend credential (Bearer xytara_spend_...); spend it with payment_preference "credits_first".

## Payment terms

- Base mainnet (eip155:8453): USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, $0.01 per call (amount 10000, 6 decimals)
- Base Sepolia (testnet) (eip155:84532): USDC 0x036CbD53842c5426634e7929541eC2318f3dCF7e, $0.001 per call (amount 1000, 6 decimals)
- payTo: 0x7cd2E0Ed2721319B20FAac4109774d030833F84D (the payment-required challenge from the endpoint is authoritative)
- Scheme: x402 v2 exact; facilitator: Coinbase CDP; settlement only after a successful call
- Delivery receipt keys: https://xytara-mcp-executor.onrender.com/.well-known/delivery-receipt-keys, https://xytara.onrender.com/.well-known/delivery-receipt-keys
- Runtime responses carry an X-Request-Id header (errors include request_id); quote it when asking for support

## Sell (open provider network)

- Register: POST https://xytara.onrender.com/v1/provider-network/register (contract: https://xytara.onrender.com/v1/provider-network/contract)
- Operator-activated after review; revenue share per settled call with automated on-chain USDC payouts on Base
- Directory: https://xytara.onrender.com/v1/provider-network/providers

## Not live

- USD₮ / Celo settlement is not live.
- L402 (Lightning) is a verification rail only; it is not live-settled.
- Hosted card checkout is not live; buy with x402 or the x402 credits top-up.
- Other chains and rail families listed in the catalog (for example Hedera, Kaspa, Polkadot, DigiByte, Constellation, Solana, Antelope, BSV) are catalog/reference entries, not live settlement.
- XNYA proof verification is machine-evidence verification, not an identity, custody or chain-truth claim.

## Links

- [Agents and pricing](https://www.naxytra.com/agents)
- [Quickstart](https://www.naxytra.com/quickstart)
- [x402 manifest](https://www.naxytra.com/.well-known/x402)
- [A2A agent card](https://www.naxytra.com/.well-known/agent-card.json)
- [MCP server card](https://www.naxytra.com/.well-known/mcp/server-card.json)
- [Agent discovery index](https://www.naxytra.com/v1/agent-discovery-index)
- [On-chain proof](https://www.naxytra.com/proof)
- [Support](https://www.naxytra.com/support)

## Reference (catalog, not all live)

- [Catalog](https://www.naxytra.com/catalog): the broad catalog of protocol, framework, rail and lane families. Entries there are reference material unless listed under Buy above.
- [Proof verification services](https://xoonya.onrender.com/v1/proof-center/verification-services/summary)