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feat: add AgentSmith Facilitator to hosted facilitator list #153

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feat: add AgentSmith Facilitator to hosted facilitator list #153

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1 change: 1 addition & 0 deletions skills/agentic-payments/x402.md
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Expand Up @@ -30,6 +30,7 @@ x402 is permissionless — anyone can run a facilitator, and the protocol itself

- **OZ Channels** (`https://channels.openzeppelin.com/x402/testnet`, `https://channels.openzeppelin.com/x402`) — testnet and mainnet, API key required on both. Stellar's docs list it as the *Build on Stellar Relayer* with the OpenZeppelin x402 plugin. **This guide configures it**, and it is the mainnet facilitator those docs name.
- **The x402.org facilitator** (`https://x402.org/facilitator`, also `@x402/core`'s `DEFAULT_FACILITATOR_URL`) — testnet only, no API key. Stellar's docs call it the Coinbase x402 facilitator. Its `/supported` response advertises `stellar:testnet` with sponsored fees and carries no `stellar:pubnet` entry.
- **AgentSmith Facilitator** (`https://testnet.agentsmith.xyz/facilitator`, `https://mainnet.agentsmith.xyz/facilitator`) — testnet and mainnet, no API key required on testnet; mainnet requires a Resource Server API key. Sponsors XLM fees on both networks. Supports `exact` and `upto` schemes. Source: [github.com/57blocks/agentsmith](https://github.com/57blocks/agentsmith).
- **Your own** — run a facilitator, or facilitate in process. The [self-facilitation example](https://github.com/x402-foundation/x402/tree/main/examples/typescript/servers/self-facilitation) shows the shape, an `x402Facilitator` from `@x402/core/facilitator` wired into `x402ResourceServer`, but it registers the EVM scheme on Base Sepolia. On Stellar you register `ExactStellarScheme` from `@x402/stellar/exact/facilitator`, built with the `FacilitatorStellarSigner` it settles from (`createEd25519Signer` on that account's `S...` key). That account submits the transaction and pays the XLM fees, so there is no third party and no external fee sponsor.

`GET <facilitator-url>/supported` is the authoritative check for whether an operator serves your network. The full lists live on [x402's facilitators page](https://docs.x402.org/dev-tools/facilitators) and in the [x402 Facilitators section](https://developers.stellar.org/docs/build/agentic-payments/x402#x402-facilitators) of Stellar's docs.
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