Reference
Glossary
The words these docs use, in one place.
On this page+
Protocol and payments
- x402
- An open protocol for paying over HTTP 402 Payment Required. Axonpay uses version 2.
- Offer
- One entry in a 402's accepts list: scheme, network, asset, amount, payTo and extras.
- exact
- The x402 scheme for a fixed price paid with one transfer per call.
- upto
- An x402 scheme where the buyer authorizes a ceiling and the seller settles actual usage.
- Facilitator
- A service that verifies payments and submits them on-chain as fee payer. Axonpay runs one for Solana mainnet and devnet, free for sellers.
- Fee payer
- The address that pays a transaction's network fee. In x402 on Solana it belongs to the facilitator.
- payTo
- The address that receives a payment. Its token account must exist.
- Receipt
- The Solana transaction signature of a settled payment. Axonpay's facilitator also records every settle attempt in a public receipts ledger.
- CAIP-2
- A chain id format,
namespace:reference. Solana mainnet issolana:5eykt4….
Solana
- SPL token
- A token on Solana's token programs. USDC is one.
- ATA
- Associated token account: the canonical token account of an owner for a mint.
- TransferChecked
- The SPL instruction that moves tokens and checks the mint and decimals.
- Lamport
- The smallest unit of SOL: one billionth.
- Priority fee
- Extra fee per compute unit that helps a transaction land sooner.
- Slot
- A window of about 400 ms in which a leader can produce a block.
- PDA
- Program-derived address: an account controlled by a program rather than a private key.
- wSOL
- Wrapped SOL, SOL held in an SPL token account so it can be moved like a token.
- SIWS
- Sign-In-With-Solana: proving wallet ownership by signing a text message. Free, no transaction.
Axonpay
- Axon Gate
- The seller middleware: the x402 server packages configured for Solana.
- Agent Shop
- The directory of x402 endpoints, listed by payTo owners.
- 402 Inspector
- A dApp tool that reads any endpoint's offers without paying.
- Leash
- Axonpay's control layer: agent wallets, mandates, spend view and the kill switch. In the dApp it lives under Build & control.
- Agent wallet
- A keypair just for one agent, generated and encrypted in the browser.
- Mandate
- An agent's spending rules: daily budget and per-call cap in USDC, allowlist of endpoints, kill switch.
- Kill switch
- Sweep back: one transaction that returns all of an agent wallet's USDC and SOL to its owner.
- Axon Score
- A 0-100 seller score (beta) from the last 90 days of receipts: smoothed success rate (80%) and settle speed (20%). Null below 3 attempts.
- Agent GDP
- The running USD total of payments settled through Axonpay's facilitator, per network.
- Pay & call
- Paying an Agent Shop listing from your browser wallet and seeing the response and receipt.
- Composite call
- Planned: one payment that pays several upstream sellers in one transaction.