> ## Documentation Index
> Fetch the complete documentation index at: https://developers.stellar.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Agentic Payments

> Build payment-enabled APIs and AI agents on Stellar using HTTP-native payment protocols like x402 and MPP.

Agentic payments enable programmatic, per-request payments over HTTP — designed for AI agents, APIs, and machine-to-machine interactions. These protocols extend the `402 Payment Required` HTTP status code into a machine-readable payment negotiation layer, allowing clients to pay for API requests natively on Stellar.

* **[x402 on Stellar](/docs/build/agentic-payments/x402)** — An open protocol from the Coinbase Developer Platform for per-request payments using Soroban authorization entries, with facilitator-based verification and settlement.
* **[MPP on Stellar](/docs/build/agentic-payments/mpp)** — The Machine Payments Protocol for direct on-chain settlement via Soroban SAC transfers, with support for both one-time charge payments and high-frequency off-chain payment channels.

> **[x402 on Stellar](/docs/build/agentic-payments/x402)**
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> **[MPP on Stellar](/docs/build/agentic-payments/mpp)**
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> 2 items