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docs(agents): link EIP-3009 on first use in x402 and MPP #2398

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GigaHierz merged 2 commits into from
Oct 20, 2026
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docs(agents): link EIP-3009 on first use in x402 and MPP #2398

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docs(agents): link EIP-3009 on first use in x402 and MPP (#2263)
GigaHierz Oct 15, 2026
a6e0a7c
docs(agents): link EVM on first use in x402 and MPP (#2263)
GigaHierz Oct 19, 2026
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4 changes: 2 additions & 2 deletions build/agents/mpp.mdx
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Expand Up @@ -46,7 +46,7 @@ submits the transaction and pays the gas; it never custodies funds.
MPP settlement on Celo runs through the same hosted facilitator as x402, which
charges a small credit per transaction. Get an API key (a human does this once):

1. Open [x402.celo.org](https://x402.celo.org) and connect an EVM wallet.
1. Open [x402.celo.org](https://x402.celo.org) and connect an [EVM](https://ethereum.org/developers/docs/evm/) wallet.
2. Click **Create API key** and sign the message (no gas, no transaction).
3. Copy the key (shown once) — it looks like `x402_...`.
4. Set it as `X402_API_KEY` in your project.
Expand Down Expand Up @@ -168,7 +168,7 @@ npm run buyer # terminal 2 — pays and prints the settlement tx
| USDC | Celo mainnet | `0xcebA9300f2b948710d2653dD7B07f33A8B32118C` |
| USDC | Celo Sepolia | `0x01C5C0122039549AD1493B8220cABEdD739BC44E` |

Both are 6-decimal and support gasless EIP-3009 transfers.
Both are 6-decimal and support gasless [EIP-3009](https://eips.ethereum.org/EIPS/eip-3009) transfers.

## Resources

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4 changes: 2 additions & 2 deletions build/agents/x402.mdx
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Expand Up @@ -12,7 +12,7 @@ x402 is an open protocol for internet-native payments that activates the HTTP 40
- **Instant Settlement**: Sub-second on Celo, compared to days with traditional payments
- **Zero Protocol Fees**: Only pay nominal blockchain gas fees
- **Agent-First**: Designed for autonomous AI agent transactions
- **Chain Agnostic**: Supports 170+ EVM chains including Celo
- **Chain Agnostic**: Supports 170+ [EVM](https://ethereum.org/developers/docs/evm/) chains including Celo

## Why x402?

Expand Down Expand Up @@ -63,7 +63,7 @@ sequenceDiagram

## Get Started with the Celo Facilitator

Celo runs its own hosted x402 facilitator, built on the open-source [`x402-rs`](https://github.com/x402-rs/x402-rs) implementation. It is the recommended default for accepting x402 payments on Celo. It accepts **USDC** and **USDT** on Celo via the gasless EIP-3009 `transferWithAuthorization` scheme — the buyer signs an authorization off-chain, and the facilitator submits it on-chain and pays the gas itself. The facilitator never custodies funds: `transferWithAuthorization` moves tokens directly payer → payee inside the token contract.
Celo runs its own hosted x402 facilitator, built on the open-source [`x402-rs`](https://github.com/x402-rs/x402-rs) implementation. It is the recommended default for accepting x402 payments on Celo. It accepts **USDC** and **USDT** on Celo via the gasless [EIP-3009](https://eips.ethereum.org/EIPS/eip-3009) `transferWithAuthorization` scheme — the buyer signs an authorization off-chain, and the facilitator submits it on-chain and pays the gas itself. The facilitator never custodies funds: `transferWithAuthorization` moves tokens directly payer → payee inside the token contract.

Two hosts are involved, and they are not interchangeable:

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