Pay-per-call APIs · Celo mainnet

Any API. Now something an agent can pay for.

Wrap any HTTP API into a pay-per-call endpoint on Celo. Agents pay per request in USDC. No account. No key. No gas.

Read the docs → Open the live gateway ↗
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A machine gaze rendered in halftone
AGENT #9765 · ERC-8004
WRAP◇PAY◇SETTLE◇REPEAT◇ WRAP◇PAY◇SETTLE◇REPEAT◇ WRAP◇PAY◇SETTLE◇REPEAT◇ WRAP◇PAY◇SETTLE◇REPEAT◇
The wall

APIs were built for humans.
Machines can't sign up.

A person creates the key, configures it, and hands it to the agent. There is a human in the middle of every machine transaction. Omni402 removes them from both sides: providers sell with one command, agents buy with a wallet.

The mechanism

Payment lives inside the request.

The buyer signs a gasless EIP-3009 authorization. Celo's facilitator submits it on-chain and sponsors the gas. USDC moves buyer to seller inside the token contract. Nobody custodies funds.

01 / ask
Agent calls the API
a plain HTTP request, no key attached
02 / gate
402 Payment Required
the gateway names its price in USDC
03 / sign
Wallet signs, no gas
an EIP-3009 authorization, off-chain
04 / settle
Facilitator pays gas
USDC settles on Celo, receipt returned
The agent economy

Thousands of small payments,
moving on their own.

Each node is an agent with its own wallet. Each thread is a settled request. No human approves any of it.

0
ERC-8004 agent ID
< $0.001
gas per settlement
~1s
Celo block finality
x402 · settlement feed

The market is live.

Every call an agent makes is a stablecoin settlement on Celo. Watch it move.

buyer → service live · celo
    First settlement, decoded from the chain ✓ verified on Celo mainnet
    Amount
    0.001000 USDC
    Block
    74,479,633
    Buyer agent
    0x4F43Cf9E7D0Cfe47185ac97BDa737217cEA3EDE3
    Seller
    0x20ECAe56e1c21a0d4079bDD0202D0fb6d1FD5000
    Authorization
    EIP-3009 AuthorizationUsed
    Gas paid by
    the facilitator, not the buyer
    receipt → celoscan.io/tx/0xf6f71df2…a38b38
    Browse payable endpoints ↗ Open the dashboard ↗
    Built on Celo

    Identity. Payments. Discovery.

    The three things an agent economy needs. Omni402 wires all three on Celo.

    Identity

    ERC-8004 agent identity

    Every agent is a portable, on-chain NFT identity, browsable and reputation-ready.

    agent #9765 ↗
    Payments

    x402 / MPP settlement

    HTTP-native pay-per-call in USDC, settled through Celo's facilitator with sponsored gas.

    api.x402.celo.org
    Discovery

    MCP marketplace

    An MCP server lets any Claude or GPT agent list what is for sale and pay for it on its own.

    list_paid_apis ↗
    Questions the old web can't answer
    Can an agent buy without a human?Yes.
    Does it need a credit card?No.
    Who signs the payment?The agent's own wallet.
    Does the buyer need gas?No. Celo sponsors it.
    Where does the money land?On-chain, with you.

    Wrap your first API in one command.

    Point it at any API, set a price, and agents can start paying on Celo.

    npx x402ify https://api.example.com --price 0.01 --wallet 0xYourWallet
    Get the repo ↗ Read the docs