Payments your agent can pay by itself.

Your agent hits a paywalled endpoint, gets back a signable challenge, signs it with its own wallet, and the payment settles on-chain in seconds. No card, no checkout, no human — and no ETH for gas.

Run it live → Read /llms.txt OpenAPI

Non-custodial by construction — usevig sits beside the transfer, never inside it.

Run it live

Real calls against the sandbox. No signup, no email, no funds.

create merchant create charge 402 challenge

# Press “Run request”. These are real API calls — nothing here is mocked.

Why it holds up

Your keys, your money

Settlement is EIP-3009 transferWithAuthorization: value moves straight from payer to merchant. There is no usevig address in the path, not for one block.

We pay the gas

usevig submits the transaction as a relayer, so neither your agent nor the merchant needs ETH. About $0.001 per payment on Base.

Priced per transaction

Metered on transactions verified, never on value transferred. Move $1M or $10k — same bill at the same count.

Replay-proof

Every nonce is single-use, rejected by both a database uniqueness constraint and an on-chain authorizationState check.

Finality, not optimism

Nothing is called final at one confirmation. Configurable depth per merchant, with reorg demotion if a transaction disappears.

Built for agents

An MCP server, /llms.txt, and a zero-credential sandbox. An agent can onboard and transact without a human touching anything.

Pricing

$01,000 verified tx / mo

$4950,000 verified tx / mo

$299500,000 verified tx / mo

Customself-hosted relayer

We charge for verification work, not for moving money. That is deliberate: usevig is a relayer and never takes custody of funds, which is what keeps it out of money-transmitter territory. Refunds and disputes stay between the merchant and their customer — an on-chain transfer cannot be reversed by us.

API

Endpoint	What it does
`POST /v1/merchants`	Create a merchant. Sandbox is self-serve.
`POST /v1/payments`	Create a charge; returns the 402 challenge.
`POST /v1/payments/:id/settle`	Verify a signature and relay on-chain.
`GET /v1/payments/:id`	Status, tx hash, confirmations.
`GET /v1/me`	Tier and usage this period.
`POST /mcp`	MCP server for agent self-onboarding.